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DIGITAL LASER PRINT

ML-4550 Series

ML-4550 / ML-4551N / ML-4551ND

ML-4551NR / ML-4551NDR

Basic Model : ML-4550

SERVICE Manual

DIGITAL LASER PRINT CONTENTS

[The keynote of Product]

- Series Model: ML-4550 / 4551N / 4551ND

- High speed Laser Printer:

Up to 43 ppm in A4 (45 ppm in Letter),

Duplex: 29 ipm (A4); 30 ipm (Letter)

- Resolution: Up to 1200 x 1200 dpi

- Marvell 500Mhz

- Memory: 128 MB (Max. 512 MB)

128, or 256 MB optional memory available.

Use only the Samsung-approved DIMM.

128 MB: ML-MEM150, 256 MB: ML-MEM160

- Option:

ML-4550:500-sheet trays, ethernet 10/100 Base

TX wired LAN, ethernet 10/100 Base hard disk, duplex unit, DIMM

- Toner cartridge:

Starter: 10K or 20K pages

Consumable: 10K or 20K pages

- Duty cycle: Monthly Up to 150,000 pages

Contents

1. Precautions

1.1 Safety Warning

1.2 Caution for safety

1.2.1 Toxic material

1.2.2 Electric Shock and Fire Safety Precautions

1.2.3 Handling Precautions

1.2.4 Assembly / Disassembly Precautions

1.2.5 Disregarding this warning may cause bodily injury

1.3 ESD Precautions

2. Product Specifications

2.1 Product Overview

2.2 Specifications

2.2.1 General Specifications

2.2.2 Controller & S/W

2.2.3 Paper Handling

2.2.4 Consumables

2.2.5 Reliability & Service

2.2.6 Environment

2.2.7 Options

2.2.8 Others

2.3 Model Comparison Table

3. Summary of Product

3.1 Printer Components

3.1.1 Front View

3.1.2 Rear View

3.1.3 Control Panel

3.2 System Layout

3.2.1 Feeding

3.2.2 Transfer

3.2.3 Driver Ass'y

3.2.4 Fuser

3.2.5 LSU (Laser Scanner Unit)

2-1

2-1

2-1

2-2

2-3

2-4

2-4

2-4

2-5

2-5

2-6

1-1

1-2

1-2

1-2

1-3

1-3

1-4

1-5

3-8

3-9

3-9

3-9

3-9

3-1

3-1

3-2

3-3

3-7

Continue...

3.2.6 Print Cartridge

3.3 Engine H/W Specifications

3.3.1 ML-4550 (PCL) Main Board

3.3.2 SMPS & HVPS board

3.3.3 Engine F/W

4. Alignment and Adjustments

4.1 How to use EDC (Engine Diagnostic Control) Mode

4.1.1 EDC Setup

4.1.2 Entrance method for EDC

4.1.3 Cover Status

4.1.4 Sensor Status

4.1.5 Motor Test

4.1.6 Fan Test

4.1.7 Clutch / Sol

4.1.8 Fuser Ctrl

4.1.9 LSU

4.1.10 Deve Control

4.1.11 Print Test and Option version

4.2 Paper Path

4.2.1 Clearing Paper Jams

4.3 Sample Pattern

4.3.1 Information Pages

4.3.2 Demo Pages

4.4 Periodic Defective Image

4.5 Error Messages

5. Disassembly and Reassembly

5.1 General Precautions on Disassembly

5.2 Transfer Roller

5.3 MPF Ass’y

5.4 Holder Pad Ass'y

5.5 Retard Ass'y

5.6 Feed2 Idle Unit

5.7 Cover Right

4-8

4-9

4-10

4-12

4-5

4-6

4-7

4-7

4-1

4-1

4-1

4-2

4-3

4-5

4-17

4-17

4-17

4-18

4-19

5-1

5-2

5-3

5-4

5-5

5-6

5-7

3-10

3-11

3-11

3-16

3-20

Continue...

5.8 Main PBA

5.9 Main Drive Ass'y

5.10 DEVE Drive Ass'y

5.11 Connector PBA

5.12 Solenoid

5.13 Rear Cover

5.14 Cover Left

5.15 Top Cover

5.16 Open Cover

5.17 Inner Cover

5.18 Fuser Ass'y

5.19 Duplex Solenoid Ass'y

5.20 Exit Roller

5.21 LSU

5.22 DC Fan

5.23 Toner Sensor PBA

5.24 REGI Ass'y

5.25 MP Pick Up Ass'y

5.26 Pick Up & Feed2 Assy

5.27 Engine Shield

6. Troubleshooting

6.1 The cause and solution of Bad image

6.2 The cause and solution of the bad discharge

6.3 The cause and solution of the malfunction

6.4 Maintaining the toner cartridge

6.5 The cause and solutions of bad environment of the software

7. Exploded Views & Parts List

7.1 Main Assembly

7.2 Cover Assembly

7.3 Frame Assembly

7.4 Fuser Unit

7.5 REGI Assembly

6-1

6-8

6-13

6-17

6-22

7-2

7-5

7-7

7-12

7-14

5-13

5-14

5-15

5-16

5-17

5-18

5-20

5-21

5-8

5-9

5-10

5-11

5-12

5-22

5-23

5-24

5-25

5-26

5-28

5-31

Continue...

7.6 Main Motor Assembly

7.7 Deve Motor Assembly

7.8 Exit Sorenoid Assembly

7.9 Cassette Assembly

7.10 Duplex Unit

7.11 SCF Unit

8.1 System Block Diagram

9.

Connection Diagram

9.1 Connection Diagram

10. Schematic Diagram

10.1 Main Board

10.2 DIMM board

10.3 CRUM board

10.4 EMPTY board

10.5 HVPS

10.6 Panel

10.7 SCF

10.8 Toner sensor

10.9 HDD.eps

11. Reference Information

11.1 Troubleshooting Tools

11.2 Acronyms and Abbreviations

11.3 Select a location for the printer

11.4 Sample Tests Patterns

9-1

10-1

10-17

10-19

10-20

10-21

10-25

10-26

10-29

10-30

11-1

11-2

11-4

11-5

7-16

7-18

7-20

7-22

7-24

7-26

8-1

1

1. Precautions

Precautions

In order to prevent accidents and to prevent damage to the equipment please read the precautions listed below carefully before servicing the printer and follow them closely.

1.1 Safety Warning

(1) Only to be serviced by appropriately qualified service engineers.

High voltages and lasers inside this product are dangerous. This printer should only be serviced by a suitably trained and qualified service engineer.

(2) Use only Samsung replacement parts

There are no user serviceable parts inside the printer. Do not make any unauthorized changes or additions to the printer, these could cause the printer to malfunction and create electric shock or fire hazards.

(3) Laser Safety Statement

The Printer is certified in the U.S. to conform to the requirements of DHHS 21 CFR, chapter 1 Subchapter J for

Class 1(1) laser products, and elsewhere, it is certified as a Class I laser product conforming to the requirements of IEC 825. Class I laser products are not considered to be hazardous. The laser system and printer are designed so there is never any human access to laser radiation above a Class I level during normal operation, user maintenance, or prescribed service condition.

Warning >> Never operate or service the printer with the protective cover removed from Laser/Scanner assembly. The reflected beam, although invisible, can damage your eyes. When using this product, these basic safety pre-cautions should always be followed to reduce risk of fire, electric shock, and injury to persons.

CAUTION - INVISIBLE LASER RADIATION

WHEN THIS COVER OPEN.

DO NOT OPEN THIS COVER.

VORSICHT - UNSICHTBARE LASERSTRAHLUNG,

WENN ABDECKUNG GE FFNET.

NICHT DEM STRAHL AUSSETZEN.

ATTENTION - RAYONNEMENT LASER INVISIBLE EN CAS

D OUVERTURE. EXPOSITION DANGEREUSE

AU FAISCEAU.

ATTENZIONE - RADIAZIONE LASER INVISIBILE IN CASO DI

APERTURA. EVITARE L ESPOSIZIONE AL

FASCIO.

PRECAUCION - RADIACION LASER IVISIBLE CUANDO SE ABRE.

EVITAR EXPONERSE AL RAYO.

ADVARSEL. - USYNLIG LASERSTR LNING VED BNING, N R

SIKKERHEDSBRYDERE ER UDE AF FUNKTION.

UNDG UDSAETTELSE FOR STR LNING.

ADVARSEL. - USYNLIG LASERSTR LNING N R DEKSEL

PNES. STIRR IKKE INN I STR LEN.

UNNG EKSPONERING FOR STR LEN.

VARNING - OSYNLIG LASERSTR LNING N R DENNA DEL

R PPNAD OCH SP RREN R URKOPPLAD.

BETRAKTA EJ STR LEN. STR LEN R FARLIG.

VARO! - AVATTAESSA JA SUOJALUKITUS OHITETTAESSA

OLET ALTTIINA N KYM TT M LLE LASER-

S TEILYLLE L KATSO S TEESEEN.

Service Manual

1-1

Samsung Electronics

Precautions

1.2 Caution for safety

1.2.1 Toxic material

This product contains toxic materials that could cause illness if ingested.

(1) If the LCD control panel is damaged it is possible for the liquid inside to leak. This liquid is toxic. Contact with the skin should be avoided, wash any splashes from eyes or skin immediately and contact your doctor. If the liquid gets into the mouth or is swallowed see a doctor immediately.

(2) Please keep toner cartridges away from children. The toner powder contained in the toner cartridge may be harmful and if swallowed you should contact a doctor.

1.2.2 Electric Shock and Fire Safety Precautions

Failure to follow the following instructions could cause electric shock or potentially cause a fire.

(1) Use only the correct voltage, failure to do so could damage the printer and potentially cause a fire or electric shock.

(2) Use only the power cable supplied with the printer. Use of an incorrectly specified cable could cause the cable to overheat and potentially cause a fire.

(3) Do not overload the power socket, this could lead to overheating of the cables inside the wall and could lead to a fire.

(4) Do not allow water or other liquids to spill into the printer, this can cause electric shock. Do not allow paper clips, pins or other foreign objects to fall into the printer these could cause a short circuit leading to an electric shock or fire hazard..

(5) Never touch the plugs on either end of the power cable with wet hands, this can cause electric shock. When servicing the printer remove the power plug from the wall socket.

(6) Use caution when inserting or removing the power connector. The power connector must be inserted completely otherwise a poor contact could cause overheating possibly leading to a fire. When removing the power connector grip it firmly and pull.

(7) Take care of the power cable. Do not allow it to become twisted, bent sharply round corners or other wise damaged. Do not place objects on top of the power cable. If the power cable is damaged it could overheat and cause a fire or exposed cables could cause an electric shock. Replace a damaged power cable immediately, do not reuse or repair the damaged cable. Some chemicals can attack the coating on the power cable, weakening the cover or exposing cables causing fire and shock risks.

(8) Ensure that the power sockets and plugs are not cracked or broken in any way. Any such defects should be repaired immediately. Take care not to cut or damage the power cable or plugs when moving the machine.

(9) Use caution during thunder or lightening storms. Samsung recommends that this machine be disconnected from the power source when such weather conditions are expected. Do not touch the machine or the power cord if it is still connected to the wall socket in these weather conditions.

(10) Avoid damp or dusty areas, install the printer in a clean well ventilated location. Do not position the machine near a humidifier. Damp and dust build up inside the machine can lead to overheating and cause a fire.

(11) Do not position the printer in direct sunlight. This will cause the temperature inside the printer to rise possibly leading to the printer failing to work properly and in extreme conditions could lead to a fire.

(12) Do not insert any metal objects into the machine through the ventilator fan or other part of the casing, it could make contact with a high voltage conductor inside the machine and cause an electric shock.

1-2

Service Manual

Samsung Electronics

Precautions

1.2.3 Handling Precautions

The following instructions are for your own personal safety, to avoid injury and so as not to damage the printer

(1) Ensure the printer is installed on a level surface, capable of supporting its weight. Failure to do so could cause the printer to tip or fall.

(2) The printer contains many rollers, gears and fans. Take great care to ensure that you do not catch your fingers, hair or clothing in any of these rotating devices.

(3) Do not place any small metal objects, containers of water, chemicals or other liquids close to the printer which if spilled could get into the machine and cause damage or a shock or fire hazard.

(4) Do not install the machine in areas with high dust or moisture levels, beside on open window or close to a humidifier or heater. Damage could be caused to the printer in such areas.

(5) Do not place candles, burning cigarettes, etc on the printer, These could cause a fire.

1.2.4 Assembly / Disassembly Precautions

Replace parts carefully, always use Samsung parts. Take care to note the exact location of parts and also cable routing before dismantling any part of the machine. Ensure all parts and cables are replaced correctly.

Please carry out the following procedures before dismantling the printer or replacing any parts.

(1) Check the contents of the machine memory and make a note of any user settings. These will be erased if the mainboard or network card is replaced.

(2) Ensure that power is disconnected before servicing or replacing any electrical parts.

(3) Disconnect printer interface cables and power cables.

(4) Only use approved spare parts. Ensure that part number, product name, any voltage, current or temperature rating are correct.

(5) When removing or re-fitting any parts do not use excessive force, especially when fitting screws into plastic.

(6) Take care not to drop any small parts into the machine.

(7) Handling of the OPC Drum

- The OPC Drum can be irreparably damaged if it exposed to light.

Take care not to expose the OPC Drum either to direct sunlight or to fluorescent or incandescent room lighting. Exposure for as little as 5 mins can damage the surface’s photoconductive properties and will result in print quality degradation. Take extra care when servicing the printer. Remove the OPC Drum and store it in a black bag or other lightproof container. Take care when working with the covers(especially the top cover) open as light is admitted to the OPC area and can damage the OPC Drum.

- Take care not to scratch the green surface of OPC Drum Unit.

If the green surface of the Drum Cartridge is scratched or touched the print quality will be compromised.

Service Manual

1-3

Samsung Electronics

Precautions

1.2.5 Disregarding this warning may cause bodily injury

(1) Be careful with the high temperature part.

The fuser unit works at a high temperature. Use caution when working on the printer. Wait for the fuser to cool down before disassembly.

(2) Do not put finger or hair into the rotating parts.

When operating a printer, do not put hand or hair into the rotating parts (Paper feeding entrance, motor, fan, etc.). If do, you can get harm.

(3) When you move the printer.

This printer weighs 22kg including toner cartridge and cassette. Use safe lifting and handling techniques. Use the lifting handles located on each side of the machine. Back injury could be caused if you do not lift carefully.

(4) Ensure the printer is installed safely.

The printer weighs 22Kg, ensure the printer is installed on a level surface, capable of supporting its weight.

Failure to do so could cause the printer to tip or fall possibly causing personal injury or damaging the printer.

(5) Do not install the printer on a sloping or unstable surface. After installation, double check that the printer is stable.

1-4

Service Manual

Samsung Electronics

Precautions

1.3 ESD Precautions

Certain semiconductor devices can be easily damaged by static electricity. Such components are commonly called

“Electrostatically Sensitive (ES) Devices”, or ESDs. Examples of typical ESDs are: integrated circuits, some field effect transistors, and semiconductor “chip” components.

The techniques outlined below should be followed to help reduce the incidence of component damage caused by static electricity.

Caution >>Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.

1. Immediately before handling a semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, employ a commercially available wrist strap device, which should be removed for your personal safety reasons prior to applying power to the unit under test.

2. After removing an electrical assembly equipped with ESDs, place the assembly on a conductive surface, such as aluminum or copper foil, or conductive foam, to prevent electrostatic charge buildup in the vicinity of the assembly.

3. Use only a grounded tip soldering iron to solder or desolder ESDs.

4. Use only an “anti-static” solder removal device. Some solder removal devices not classified as “anti-static” can generate electrical charges sufficient to damage ESDs.

5. Do not use Freon-propelled chemicals. When sprayed, these can generate electrical charges sufficient to damage ESDs.

6. Do not remove a replacement ESD from its protective packaging until immediately before installing it. Most replacement ESDs are packaged with all leads shorted together by conductive foam, aluminum foil, or a comparable conductive material.

7. Immediately before removing the protective shorting material from the leads of a replacement ESD, touch the protective material to the chassis or circuit assembly into which the device will be installed.

8. Maintain continuous electrical contact between the ESD and the assembly into which it will be installed, until completely plugged or soldered into the circuit.

9. Minimize bodily motions when handling unpackaged replacement ESDs. Normal motions, such as the brushing together of clothing fabric and lifting one’s foot from a carpeted floor, can generate static electricity sufficient to damage an ESD.

Service Manual

1-5

Samsung Electronics

2

2. Product Specifications

2.1 Product Overview

Item Descriptions

Basic Model ML-4550

Series Model

Maket of Sailes

Specification

ML-4550, ML-4551N, ML-4551ND, ML-4551NDG(Kor.)

Office user Laser printer. (Network for work Group)

43ppm(Ltr. 45ppm), 500MHz Processor, 128MB Memory

10K(initial), 20K(sailes)

USB(Hight Speed USB 2.0), Network Option,

ML-4551N, ML-4551ND(Network base)

Face Down(250 sheets), Face Up(100 sheets)

2.2 Specifications

Product Specifications are subject to without notice. See below for product specifications.

2.2.1 General Specifications

ITEM

Engine Speed Simplex

Duplex

ML-4550

ML-4550 SERIES

ML-4551N

Up to 43 ppm in A4 (45 ppm in Letter)

Option : 29 ipm in A4 (30 ipm in Letter)

Warmup time -

FPOT From Ready

Less than 45 sec : Power-on boot

Less than 8.5 sec

From Idle Less than 43.5 sec

From Coldboot Less than 53.5 sec

Resolution Up to 1200 x 1200 dpi effective output

ML-4551ND

Specifications

Remark

Service Manual

2-1

Samsung Electronics

Specifications

2.2.2. Controller & S/W

ITEM

Processor

Memory

Printer Languages

Fonts

Driver

Std.

ML-4550

Marvell 500Mhz

128 MB

ML-4550 SERIES

ML-4551N ML-4551ND

Max.

-

512MB(256+256)

PostScript3, PCL6, IBM ProPrinter, EPSON, PDF Direct(only HDD installed)

45 scalable, 1 bitmap, 136 PostScript 3 fonts, OCR Fonts

Default Driver PCL6 : Win 95/98/NT4.0/2000/Me/XP(32/64bits)/2003 Server(32/64bits)

PS : Linux & Mac

Supporting OS Windows 95/98/NT4.0/2000/Me/XP(32/62bits)/2003 Server(32/62bits)

Various Linux OS including Red Hat 8~9, Fedora Core 1~3, Mandrake 9.2~10.1

and SuSE 8.2~9.2

Mac OS 8.6~9.2/10.1~10.4

WHQL

Wired Network Protocol

Windows 2000, XP, 2003 Server

N/A

Supporting OS N/A

SPX/IPX, TCP/IP, SNMP, HTTP 1.1, AppleTalk

Windows 98/ME/NT4.0/2000/XP(32/64bits)/2003

Server(32/64bits)

Netware 4.x, 5.x, 6.x

Mac OS 8.6~9.2, 10.1~10.4

Various Linux OS including Red Hat 8.0~9.2, Fedora

Core 1~3, Mandrake 9.2~10.1 and SuSE 8.2~9.2

Wireless Protocol N/A

Network

Application

Interface

Parallel

USB

Wired Network -

Wireless Network -

User Interface

LCD -

-

-

LED

Key

Supporting OS N/A

RCP N/A

Status Monitor N/A

Smart Panel YES (Include RCP and SM)

Network N/A

Management

-

-

IEEE 1284

High Speed USB 2.0

Optional

N/A

16 x 12 Character LCD

2LED(Status LED, Save Button LED)

8 Key: Menu , , OK (*) ,

10/100 Base TX

, Back Toner Save , Demo , Stop

2-2

Service Manual

Samsung Electronics

Specifications

2.2.3. Paper Handling

ITEM

Standard

Capacity

-

Max. Capacity -

Printing Max. Size

Min. Size

Multi-purpose tray

Capacity

Media sizes

-

-

Media type -

Media weight -

Sensing -

Standard Cassette Tray

Capacity

Media sizes

Media types

-

-

-

Media weight -

Sensing -

Second Optional

Cassette Tray

Capacity

Media sizes

Media types

-

-

-

Media weight -

Sensing -

Third Optional

Cassette Tray

Capacity

Media sizes

Media types

-

-

-

Media weight -

Sensing -

Output Stacking

Capacity Face-Down

Face-Up

Output Full sensing -

Optional Stacker

Capacity Face-Down

Duplex

Supporting

-

Media sizes

Media types

Media weight -

-

-

Samsung Electronics

ML-4550

ML-4550 SERIES

ML-4551N ML-4551ND

500-sheet Cassette Tray, 100-sheet Multi Purpose Tray @75g/

2,100 sheets @75g/

216 x 356 mm (8.5" x 14")

76 x 127 mm (3.0" x 5.0")(>105g)

100 sheets @75g/

A4, A5, A6, Letter, Legal, Oficio, Folio, Executive,ISO B5, JIS B5, 3"x5", Monarch,

No.10, DL, C5, C6

Transparencies, Envelopes, Labels, Card stock

16~43 lb (60 to176g/ )

Paper empty sensor

500 sheets @ 75g/

A4, A5, Letter, Legal, Executive, Folio, Oficio, ISO B5, JIS B5

Plain Paper

16~28lb (60 to 105g/ )

Paper empty sensor, Paper Size Sensor

500 sheets @ 75g/

A4, A5, Letter, Legal, Executive, Folio, Oficio, ISO B5, JIS B5

Plain Paper

16~28lb (60 to 105g/ )

Paper empty sensor, Paper Size Sensor

500 sheets @ 75g/

A4, A5, Letter, Legal, Executive, Folio, Oficio, ISO B5, JIS B5

Plain Paper

16~28lb (60 to 105g/ )

Paper empty sensor, Paper Size Sensor

250 sheets @ 75g/

100 sheets @ 75g/

Paper full Sensor

N/A

Optional

A4, Letter, Legal, Folio, Oficio

Plain Paper

20~24lb (75~90g/ )

Built-in

Service Manual

2-3

Specifications

2.2.4. Consumables

ITEM

Toner

Drum

Black

Key

Life detect

Yield

ML-4550

ML-4550 SERIES

ML-4551N

Standard 10K pages @ ISO 19752 standard Coverage

High Yield 20K pages @ ISO 19752 standard Coverage

Electronic key(CRUM)

Toner remaining volume would be traced via software

Same as consumables

ML-4551ND

2.2.5. Reliability & Service

ITEM

Printing Volume -

(SET AMPV)

Max. Monthly -

Duty

MPBF

MTTR

SET Life Cycle -

-

-

ML-4550

5,000 sheets / month

ML-4550 SERIES

ML-4551N

150,000 sheets

150,000 sheets

20 min.

500,000 sheets or 5 years (whichever comes first)

ML-4551ND

2.2.6. Environment

ITEM

Acoustic Noise Printing

Level(Sound

Power/Pressure)

Standby

ML-4550

Less than 57.0 dBA

Less than 35.0 dBA

ML-4550 SERIES

ML-4551N

Power

Sleep

AVG.

Back Ground Level

Less than 650W

Consumption Sleep/Power Off Less than 13W

Dimension SET 396 x 453 x 353 mm (15.6" x 17.8" x 13.9")

(W x D x H)

SET Packing 518 x 566 x 568 mm (External)

CRU 314 x 242 x 138 mm

Toner Packing 370 x 286 x 180 mm (External)

Weight SET

Toner(10K)

Gross

17.8kg(39.2 Ib)

10K : 1.85kg(4.08 Ibs), 20K : 2.06kg(4.54 Ibs)

21.6kg(47.62 Ibs)

2-4

Service Manual

ML-4551ND

396 x 501 x 353 mm

(15.6" x 19.7" x 13.9")

19.1kg

23.5kg(51.81 Ibs)

Samsung Electronics

Specifications

2.2.7. Options

ITEM

Memory -

Second Cassette -

Third Cassette -

Stacker -

Stapler

PostScript -

Wired Network -

Hard Disk

Duplex Unit

-

-

ML-4550 SERIES

ML-4550

128MB/512MB (256MB+256MB)

ML-4551N

500 sheet Cassette Tray

500 sheet Cassette Tray

N/A

N/A

Default

Ethernet 10/100 Base

TX (Internal)

40GB

Optional

Default

ML-4551ND

Default

Default

2.2.8. Others

ITEM

Performance Jam Rate

Requirement

ML-4550

Base Line Paper : 1/12K

Standard Paper : 1/10K

Stress Paper : 1/1500

ML-4550 SERIES

ML-4551N ML-4551ND

Service Manual

2-5

Samsung Electronics

2.3 Model Comparison Table

Project

Model Name

SEC

ML-4550

HP

LJ-4250

Lexmark

T642

Brother

HL-8050N

Dell

W5200N

Engine

FPOT

Speed(ppm)

Resolution

Noise(dB)

Weight

Demension(W*D*H)

Control

Processor

Ram(Std.)

Ram(Max.)

Emulation

Interface

Optional Interface

Paper Handling

Paper Input(Capa./Type)

Paper Output

Others

Max.Monthly Duty

Consumable Yeild

Power Consumption

Duplex

Options

8.5 sec

43ppm (Ltr. 45ppm)

1200 dpi

57dB(Printing), 35dB(Idle)

17.83kg

15.6 x 17.8 x 13.9

396 x 453 x 353 mm

500MHz

128MB

512MB

PCL6, PS3

IEEE1284, USB 2.0

10/100 Base TX

8 sec

43ppm (Ltr. 45ppm)

1200 dpi not_inform

20.2kg (45 lbs)

16.5 x17.8 x14.8

418x451x377mm

460MHz

48MB

512MB

PCL6, PS3

IEEE1284, USB 2.0

10/100 Base TX

8.5 sec

43ppm (Ltr. 45ppm)

1200 dpi x 1200 dpi

55dB(Printing), 30dB(Idle)

23.1Kg (51lbs)

436x523x406mm

(17.2 x20.6 x16 )

457 MHz RISC

64MB

576MB

PCL6, PS3

IEEE1284, USB 1.1

10/100 Base TX

9 sec

34ppm (Ltr. 35ppm)

1200dpi x 1200 dpi

54dB(Printing), 27dB(Idle)

20.6Kg (45.2 lbs)

16.6 x 18.3 x 15.9

300MHz

64MB

576MB

PCL6, PS3,

10/100 Base TX

IEEE1284, USB

2.010/100 Base TX

N/A

8.5 sec

43ppm (Ltr. 45ppm)

1200 dpi x 1200 dpi

55dB(Printing), 34dB(Idle)

45lbs

(17.2 x20.2 x16 )

500 MHz RISC

80MB

336MB

PCL6, PS3,

10/100 Base TX

IEEE1284, USB

2.010/100 Base TX

N/A

500 Sheets

Cassette100 MP Tray

250 Sheets Face down

100 Sheets Face up

500 Sheets

Cassette100 MP Tray

250 Sheets Face down

500 Sheets

Cassette100 MP Tray

500 Sheets Face Down

550 Sheets Cassette

150 Sheets Cassette

500 Sheet Face down

70 Sheet Face up

500 Sheets

Cassette100 MP Tray

250 Sheets Face Down

150,000 sheets

Standard 10K

High Yield 20K

200,000 sheets

Standard 10K

High Yield 20K

Printing : Less than 650 W Printing : 680 W

Sleep : under 13 W Sleep : under 20 W

Option Option

- Memory (128MB/256MB)

- 3x500 sheet SCF

- Duplex

- 40GB HD

- Memory

- 500 sheet SCF

- Duplex

- HP Jetdirect

- 20GB HD

- Stacker & Stapler

225,000 sheets

Standard 6K

High Yield 21K not_inform

Option

- 250 sh duplexer

- 3x250 sh drawer

- 2000 sh drawer(Max.3850)

- 85 sh envelope feeder

- 650 sh output expander

- 1850 sh High capacity output stacker

- 40 sheet staple

- 5 bin mailbox

(5x120 sh )

-

17K

Printing: < 593W

Sleep:< 12W

Option

- SCF

- Memory

- Stand

- Sorter/Mail box

225,000 sheets

Standard 18K

High Yield 27K not_inform

NO

- duplexer

- 85 envelope feeder

- 500 sheet cassette

- 250 sheet cassette

Service Manual

ACCESSORY

Item

INA-ACCESSORY

CBF-POWER CORD

BAG PE

S/W APPLICATION-CD

S/W APPLICATION-CD

MANUAL-(CARD)WARRANTY CARD

MANUAL-NETWORK GUIDE

LABEL(P)-BLANK 90*25

Specifications

Code

JC99-01974E

3903-000042

6902-000288

JC46-00280A

JC46-00293A

JC68-00690A

JC68-01579A

JC68-01584A

Quantity

Samsung Electronics

Service Manual

2-7

3

3. Summary of Product

Summary of Product

This chapter describes the functions and operating principal of the main component.

3.1 Printer Components

3.1.1 Front View

Samsung Electronics

Service Manual

3-1

Summary of Product

3.1.2 Rear View

3-2

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Samsung Electronics

3.1.3 Control Panel

The control panel on the top right side of your printer has the display and the nine buttons.

Summary of Product

3.1.3.1 Display

Samsung Electronics

Service Manual

3-3

Summary of Product

3.1.3.2 Overview of Control Panel Menus

The control panel menus are used to configure the printer for your environment.

The control panel provides access to the following menus.

3-4

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Samsung Electronics

Summary of Product

3.1.3.3 Special Features

Your new printer is equipped with special features that improve the print quality,giving you a competitive edge.

You can:

Print with excellent quality and high speed

• You can print up to 1200 x 1200 dpi effective output. See the Software Section.

• Your printer prints A4-sized paper at up to 43 ppm a and letter-sized paper at up to 45 ppm. For duplex printing, your printer prints A4-sized paper at up to 29 ipm b and lettersized paper at up to 30 ipm.

Handle paper flexibly

• The multi-purpose tray supports letterheads, envelopes, labels, transparencies, customsized materials, postcards, and heavy paper. The multi-purpose tray holds up to 100 sheets of plain paper.

• The 500-sheet standard tray 1 supports plain paper in various sizes.

• The 500-sheet optional tray support plain paper in various sizes. You can install up to 3 additional trays.

• Two output tray; select either the output tray (face-down) or the rear cover (face-up) for the most convenient access.

• Straight-through paper path capability from the multi-purpose tray to the rear cover.

Create professional documents

• Print Watermarks. You can customize your documents with words, such as “Confidential.”

See the Software Section.

Save your time and money

• Print Posters. The text and pictures of each page of your document are magnified and printed across the sheet of paper and can then be taped together to form a poster. See the Software Section.

a. pages per minute b. images per minute

1

3

2

4

• This printer allows you to use toner save mode to save toner.

• You can print on both sides of the paper to save paper (double-sided printing) if you use the ML-4551ND or install the optional duplex unit in the ML-4550 and ML-4551N.

• You can print multiple pages on a single sheet of paper to save paper (N-Up printing). See the Software Section.

• You can use preprinted forms and letterhead with plain paper. See the Software Section.

• This printer automatically conserves electricity by substantially reducing power consumption when not in use.

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Service Manual

3-5

Summary of Product

Expand the printer capacity

• Your printer has 128 MB of memory which can be expanded to 512 MB.

• A Network interface enables network printing. You can add an optional network interface card to the ML-4550. The ML-4551N and ML-4551ND come with a built-in network interface, 10/100 Base TX.

• You can add 500-sheet optional trays to your printer. These trays let you add paper to the printer less often.

• A PostScript 3 Emulation* (PS) enables PS printing.

Use the optional hard disk

You can install an optional hard disk in your printer.

• The 40 GB hard disk can store the data from your computer in the print queue. This decreases the workload of the computer.

• You can use various print features, such as storing a job in the hard disk, proofing a job, and printing private documents.

• You can manage the print jobs in the print queue of the printer hard disk. For details.

Print in various environments

• You can print in Windows 98/Me/NT 4.0/2000/XP/2003.

• Your printer is compatible with Linux and Macintosh.

• Your printer comes with both Parallel and USB interfaces.

• You can also use a network interface. The ML-4551N and ML-4551ND come with a built-in network interface, 10/100

Base TX. However, you need to install the optional wired network interface card to the ML-4550.

Printer Features

The table below lists a general overview of features supported by your printer.

(I: Installed, O: Option)

Features

IEEE 1284 Parallel

USB 2.0

Network Interface

(Ethernet 10/100 Base TX)

Hard Disk

PostScript* Emulation

Duplex Unit

Optional Tray 2

Optional Tray 3

Optional Tray 4

ML-4550

I

I

O

O

O

O

O

I

O

ML-4551N

I

I

I

O

I

O

O

O

O

ML-4551ND

I

I

I

O

I

I

O

O

O

3-6

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Samsung Electronics

3.2 System Layout

Summary of Product

Samsung Electronics

❶ Cassette

❸ MPF

❷ Duplex

❹ Print Cartridge

❺ LSU ❻ Fuser

❼ SMPS & HVPS Board ❽ Duplex Solenoid

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3-7

Summary of Product

3.2.1 Feeding

It is consists of a basic cassette, an MP tray for supplying different types of media : envelope, label special paper, duplex unit, and parts related to paper transferring.

1) Separation method

Separate it from the friction pad mounted to the center of the cassette and apply retard roller that uses a spring clutch. A feed roller uses an electronic clutch to control driving power.

2) Basic cassette

It takes a center loading method and applies 'friction pad separating method.' It means that there is a paper sensor, but a paper size is detected after detecting the first paper by software.

Both the side guide and the rear guide can be adjusted for for various types of papers from A5 to legal size paper.

It has a paper existence sensing function (Capacity: 500 sheets of general paper), paper arranging function, various size papers accepting function, SCF paper path function, and displaying function of paper remaining amount.

In the front side, there is a paper level indicator.

3) Pick-up roller

It has functions such as a paper pickup function, driving control function, paper feeding function, and removing electronic static function.

4) Retard roller

It takes an arrangement method which uses a stopper roller and a weight without electric actuator.

It has paper separating function, driving control function, and multi feeding prevention function.

6) Registration roller

It has a paper arranging function, paper transferring function, paper detecting function, jam removing function, and so on.

7) MP tray

It has a paper arranging function, paper transferring function, jam removing function, and so on.

It uses rubbing pad method to feed 100 sheets of general papers and 10 envelops.

It is possible to extend to 300mm for accepting a legal size paper.

8) Duplex unit

It has paper transferring function, paper guide function, jam removing function, paper sensing function, and main board supporting function.

It is designed for basic attachment, and the duplex feeding takes a side feeding method. Usable papers are A4, letter, and legal size paper.

For removing a jam occurred in a front part, it is designed to open a cassette and a guide.

It is designed to open a rear cover to remove a jam in a rear part.

If a face up tray is open, the duplex option cannot be used.

9) SCF (Second Cassette Feeder)

It is the same method with the main cassette, and the capacity is 500 sheets.

It has a separate driving mechanism. It is designed for a common use with a main cassette.

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Summary of Product

3.2.2 Transfer

It consists of a PTL (Pre-transfer Lamp) and a transfer roller. A PTL sheds light on an OPC drum, lowers an electric potential of an OPC drum's surface, and improves the efficiency of the transfer.

A transfer roller transfers toner on an OPC drum to the paper.

Life span: Print over 150,000 sheets (In 16~27 )

3.2.3 Driver Ass'y

By driving the motor, the system takes power. It consists of a main motor for feeding fuser and duplex reverse turn, and a deve-motor for a toner cartridge.

- Main Motor : DC 24V, Rated RPM : 1604rpm

- Deve Motor : DC 24V, Rated RPM : 1424 rpm

3.2.4 Fuser

It is consisted of a heat lamp, heat roller, pressure roller, thermistor and thermostat. It sticks the toner on a paper by heat and pressure to complete the printing job.

- E-coil Heator : 1,300 Watt 50W

1) Thermostat

When a heat lamp is overheated, a Thermostat cuts off the main power to prevent over-heating.

- Non-Cotact type Thermostat

3) Heat roller

The heat roller transfers the heat from the e-coil to apply a heat on the paper. The surface of a heat roller is coated with Teflon, so toner does not stick to the surface.

4) Pressure roller

A pressure roller mounted under a heat roller is made of a silicon resin, and the surface also is coated with Teflon. When a paper passes between a heat roller and a pressure roller, toner adheres to the surface of a paper permanently.

5) Items for safety

Protecting device for overheating

- 1st protection device: Hardware cuts off when overheated

- 2nd protection device: Software cuts off when overheated

- 3rd protection device: Thermostat cuts off main power.

Safety device

- A fuser power is cut off when a front cover is opened

- Maintain a temperature of fuser cover's surface under 80(C for user, and attach a caution label at where customer can see easily when customer open a rear cover.

3.2.5 LSU (Laser Scanner Unit)

It is the core part of the LBP which switches from the video data received to the controller to the electrostatic latent image on the OPC drum by controlling laser beam, exposing OPC drum, and turning principle of polygon mirror. The OPC drum is turned with the paper feeding speed. The /HSYNC signal is created when the laser beam from LSU reaches the end of the polygon mirror, and the signal is sent to the controller. The controller detects the /HSYNC signal to adjust the vertical line of the image on paper. In other words, after the /HSYNC signal is detected, the image data is sent to the LSU to adjust the left margin on paper. The one side of the polygon mirror is one line for scanning.

Service Manual

Samsung Electronics

3-9

Summary of Product

3.2.6 Print Cartridge

By using the electronic photo process, it creates a visual image. In the print cartridge, the OPC unit and the toner cartridge unit are in a body. The OPC unit has OPC drum and charging roller, and the toner cartridge unit has toner, supply roller, developing roller, and blade (Doctor blade)

- Developing Method: Non-contacting method

- Toner : Non magnetic 1 component pulverized type toner

- The life span of toner : 10,000 or 20,000 pages (LSA Pattern/A4 standard)

- Toner remaining amount detecting sensor : Yes

- OPC Cleaning : Cleaning blade type

- Management of disusable toner : Collect the toner by using Cleaning Blade

- OPC Drum protecting Shutter : Yes

- Classifying device for toner cartridge : ID is classified by CRUM.

2

Cleaning Roller

V

PP

= 1500V, f = 3.0KHz

4

-650V

-50V

-

200V

+

+ -

200V

-1.30KV

1

8

Cleaning Blade

3

6

5

+5.0kV

7

<Toner Cartridge Layout>

3-10

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Samsung Electronics

Summary of Product

3.3 Engine H/W Specifications

3.3.1 ML-4550 (PCL) Main Board

The Engine Board and the Controller Board are in one united board, and it is consisted of CPU part and print part in functional aspect. The CPU is functioned as the bus control, O/O handling, drivers, and PC interface. The main board sends the Current Image by Video data to the LSU and manages the conduct of Electrophotography for printing. It is consisted of the circuits of the motor (paper feed, pass) driving, clutch driving, pre-transfer lamp driving, current driving, and fan driving.

The signals from the paper feed jam sensor and paper empty sensor are directly inputted to the main board.

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Service Manual

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Summary of Product

3.3.1.1 Asic (ORION 2)

Marvell Feroceon 2850 ARM Compatoble (I-Cache: 32KB, D-Cache-32KB)

64-bit RISC embedded processor core

Dual bus architecture for bus traffic distribution

- AMBA High performance Bus (AHB)

- System Bus with SDRAM

- 64-bit Mbus Crossbar extension Interface with Flash and Device port

SDRAMC

- 32 Bits Dual mode DDR-II, 200MHz

- 4 Banks (Up to 256MB per Bank)

Device Controller

- Boot Flash 1 Bank (Up to 128MB)

- Device/NOR Flash 3 Banks (Up to 128MB per Bank)

No Graphic Execution Unit and Image processor

No Codec (Encoding / Decoding)

Printer Video Controller Interface for LBP engines

- Hyper-C : Printer Video Controller with RET algorithm

(Line Memory & Lookup Table Memory : 512 x 8 , 4096 x 16)

Dual / Single Beam, LVDS Pad (VDO, HSYNC)

PCI Controller

- 32Bits, 66MHz (PCI) / 133MHz (PCI-X)

- PCI Local Bus Specification rev. 2.2 compliant

- PCI Express Specification beta 1.0a compliant

- Host /Agent Mode (Support 3+4 Express Devices in Host Mode)

Engine Controller (LPEC1)

- LSU Interface unit

- Step Motor: 2 Channels

- PWM: 8 Channels

- ADC: 6 Channels

USB 2.0 Interface with Embedded USB 2.0 PHY

Gigabit Ethernet Controller

- IEEE 802.3 compliant with 10/100/1000 Mbps full-duplex GbE port

- Support GMII,MII and RGMII interface with external PHY/SERDES device

Package : 496pins PBGA

Power : 1.2V(Core), 3.3V(IO) power operation

Speed : 600MHz core(ARM9 Compatible) operation, 200MHz bus operation

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Summary of Product

3.3.1.2 Memory

NOR Flash Memory : It stores System Program and downloads the System Program through PC Interface, and in case of model for export it compresses the PCL font, then stores it.

- Capacity : 128M Byte

- Access Time : 70 nsec

DDR SDRAM : It is used as Swath Buffer, System Working Memory Area, etc. when printing.

It stores Font List, compressed into Flash memory, on DRAM and uses it as PCL font in case of model for export.

- Capacity : 128 Byte(Basic), up to 512Mbyte (User Option)

- Type : DDR-II SDRAM 200MHz , 32bit

3.3.1.3 Others

The Option PBA can be mounted for supporting the serial communication.

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Service Manual

3-13

Summary of Product

3.3.1.4. 88F5281 Internal Block Diagram

Feroceon CPU

32 KB

L1

Dcache

32 KB

L1

Icache

Local bus ? 4 bit up to 200 MHz

Mbus-L to

Mbus

Bridge

Mbus ? Crossbar extension)

64 bit @ 166 MHz

GPPs,

UART x 2,

TWSI,

Flash

PCI-

Express x 1 port

PCI/PCI-X

64-bit port

Gigabit

Ethernet port

USB 2.0 port

Dual Channel

32 bit up to 200 MHz

DDR1/DDR2

SDRAM Controller

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Samsung Electronics

Summary of Product

3.3.1.5 Sensor Input Circuit

3.3.1.5.1 Paper Empty Sensing

The Paper empty sensor (Photo Interruptor) on the engine board informs the state of paper to CPU whether it is empty or not with operation of the actuator.

When cassette is empty, it detects the fact by reading the D0 Bit of CPU, and then informs the fact by selecting the second LED(yellow) among the panel LEDs.

3.3.1.5.2 MP Sensing

By operation of Actuator on the frame, MP Sensor (Photo interruptor) on the engine board informs the state of paper to

CPU whether it is empty or not. It reads the D0 Bit of CPU for recognizing paper in MP, and paper is fed from MP if there is.

3.3.1.5.3 Paper Feeding/Width Toner Cartridge Sensing

When paper passes the actuator (feed sensor part), it detects the signal of Photo interrupter, informs the paper feeding state to CPU, and then sprays the image data after certain time.

If it doesn’t detect the feed sensor within 1sec. after paper is fed, paper Jam0 (CPU #_ ) is occurred (Red and Yellow will be turned on among the OP panel LEDs), and the fact whether the developer is inserted or not is detected with the same principle. After the developer is mounted, the actuator is operated. The signal from the photo interrupter is detected when it is passing the actuator of the sensor part. That is the developer ID sensing.

3.3.1.5.4 Paper Exit Sensing

It detects paper state whether paper gets out from the set with operation of exit sensor on the engine board and actuator on the frame. Paper detects the on/off time of exit sensor by reading D2 Bit of CPU, and the normal operation or jam information is informed to the CPU.

The paper JAM2 is informed. (Red, Yellow LED will be turned on among the OP panel LEDs)

3.3.1.5.5 Cover Open Sensing

The Cover open sensor is located on the front cover. After the front cover is opened, +24V (DC fan, Solenoid, Main

Motor, Polygon motor part of LSU and HVPS), which is supplied to the each unit, is cut off. The cover-open sensing is operated by the D0 bit of CPU, and the developer ID sensing is operated by D7 bit of CPU.

In case, the red LED among OP pnael LEDs will be ON for informing the facts to user.

3.3.1.5.6 DC FAN / SOLENOID Driving

It is driven by transistor and controlled by D6 bit of CPU.

When it is high, the fan is driving by turning on the TR, and it is off when the sleep mode is selected. There are two solenoids, and they are driven by paper pick-up and MP signal. It is turned on or off by D4 bit of CPU, and its driving time is

300ms. The diode protects the driving TR from the noise pulse, which is flown when the solenoid id de-energizing.

FAN Driving Circuit is driven by Transistor, and controlled by D6 Bit of

3.3.1.5.7 Motor Driving

The motor driving circuit is formed when the Driver IC is selected in the first place. The A3977 Motor Driver IC is used in this case. But resistance Rs value of sensing and voltage value of the V reference can be changed by motor driving voltage value. The motor driving voltage is calculated with the following formula.

I = Vref / Rs, wherein Vref is (R1x 5V) / (R1+R2).

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Service Manual

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Summary of Product

3.3.2 SMPS & HVPS board

Outputs 5V, 24V to supply the power to the main board and Optional Board(SCF, Duplex) (Not ADF Board)

SMPS

HVPS

3-16

Service Manual

Samsung Electronics

Summary of Product

3.3.2.1 HVPS (High Voltage Power Supply)

• Transfer High Voltage (THV+)

- Input Voltage : 24 V DC 15%

- Output Voltage : MAX +5.0KV 5 %,(Duty Variable, no loading )

-1.2KV

15% (when cleaning, 200 )

- Output Voltage Trigger : 6.5

- Input contrast of the Voltage stability degree :under 5 % (fluctuating input 21.6V ~ 26.4V)

Loading contrast : 5 % or less

- Output Voltage Rising Time : 100 ms Max

- Output Voltage Falling Time : 100 ms Max

- Fluctuating transfer voltage with environmental various : +650 V(Duty 10%) ~ 5 KV (Duty 90%)

- Environment Recognition Control Method : The THV-PWM ACTIVE is transfer active signal. It detects the resistance by recognizing the voltage value, F/B, while permits the environmental recognition voltage.

- Output Voltage Control Method : Transfer Output Voltage is outputted and controlled by changing Duty of THVPWM

Signal. 10% Duty : +650V, 90%

Duty : +5KV 5%

Fuser Voltage

- Input Voltage : 24 V DC 15%

- Output Voltage : 30V~1000V DC 30V

- Output Voltage Rising Time : 50 ms Max

- Output Voltage Falling Time : 50 ms Max

- Output Loading range : 30 M ~ 1000 M

- Output Control Signal(MHV-PWM) : CPU is HV output when PWM is Low

Cleaning Voltage (THV-)

- The (+) Transfer Voltage is not outputted because the THV PWM is controlled with high.

- The (-) Transfer Voltage is outputted because the THV-Enable Signal is controlled with low

- The output fluctuation range is big because there is no Feedback control.

Developing Voltage (DEV)

- Input Voltage : 24 V DC 15%

- Output Voltage: -200V ~ -600V DC 20V

- Output Voltage Fluctuation range: PWM Control

- Input contrast of the output stability degree : 5 % or less

Loading contrast : 5 % or less

- Output Voltage Rising Time : 50 ms Max

- Output Voltage Falling Time : 50 ms Max

- Output Loading range : 10M ~ 1000 M

- Output Control Signal (BIAS-PWM) : the CPU output is HV output when PWM is low.

Supply

- Output Voltage : -400V~ -800V DC 50V(ZENER using, DEV )

- Input contrast of the output stability degree : under 5 %

Loading contrast : 5 % or less

- Output Voltage Rising Time : 50 ms Max

- Output Voltage Falling Time : 50 ms Max

- Output Loading range : 10 M ~ 1000 M

- Output Control Signal (BIAS-PWM) : the CPU is HV output when PWM is low.

Samsung Electronics

Service Manual

3-17

Summary of Product

3.3.2.2 SMPS (Switching Mode Power Supply)

It is the power source of entire system. It is assembled by an independent module, so it is possible to use for common use.

It is mounted at the bottom of the set.

It is consisted of the AMPS part, which supplies the DC power for driving the system, and the AC heater control part, which supplies the power to fuser. SMPS has two output channels. Which are 3.3V and +24V.

• AC Input

- Input Rated Voltage : AC 220V ~ 240V AC 120V / AC 220V(EXP version)

- Input Voltage fluctuating range : AC 198V ~ 264V AC 90V ~ 135V / AC 198V ~ 264V (EXP version)

- Rated Frequency : 50/60 Hz

- Frequency Fluctuating range : 47 ~ 63 Hz

- Input Current : Under 4.0Arms / 2.0Arms (But, the status when lamp is off or rated voltage is inputted/outputted )

• Rated Output Power

• Power Consumption

NO

1

2

3

ITEM

Stand-By

PRINTING

Sleep-Mode

CH1(+3.3V)

1.0 A

1.0 A

0.8A

• Length of Power Cord : 1830 50mm

• Power Switch : Use

CH2(+5V)

0.07A

0.14A

0.01A

CH3(24V)

0.4 A

2.0 A

0.4A

System

AVG : 55 Wh

AVG : 280 Wh

AVG : 10 Wh

3-18

Service Manual

Samsung Electronics

Summary of Product

• Feature

- Insulating Resistance : 50 or more (at DC 500V)

- Insulating revisiting pressure : Must be no problem within 1 min. (at 1500Vac,10mA)

- Leaking Current : under 3.5mA

- Running Current : under 40A PEAK (AT 25 , COLD START) under 60A PEAK (In other conditions)

- Rising Time : within 2Sec

- Falling Time : over 20ms

- Surge : Ring Wave 6KV-500A (Normal, Common)

• Environment Condition

- Operating temperature range :

- Maintaining temperature range : -25 85

- Preserving Humidity Condition : 30% 90% RH

- Operating atmospheric pressure range :

3.3.2.3 FUSER AC POWER CONTROL

Fuser(HEAT LAMP) gets heat from AC power. The AV power controls the switch with the Triac, a semiconductor switch.

The ON/OFF control is operated when the gate of the Triac is turned on/off by Photo triac (insulting part).

In other words, the AC control part is passive circuit, so it turns the heater on/off with taking signal from engine control part.

When the HEATER ON signal is turned on at engine, the LED of PC1 (Photo Triac) takes the voltage and flashes.

From the flashing light, the Triac part (light receiving part) takes the voltage, and the voltage is supplied to the gate of

Triac and flows into the Triac. As a result, the AC current flows in the heat lamp, and heat is occurred.

On the other hand, when the signal is off, the PC1 is off, the voltage is cut off at the gate of Triac, the Triac becomes off, and then the heat lamp is turned off.

Triac (THY1) feature :12A, 600V SWITCHING

Phototriac Coupler (PC3)

Turn On If Current : 15mA 50mA(Design :16mA)

High Repetive Peak Off State Voltage : Min 600V

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Service Manual

3-19

Summary of Product

3.3.3 Engine F/W

3.3.3.1.Control Algorithm

• Feeding

If feeding from a cassette, the drive of the pickup roller is controlled by controlling the solenoid. The on/off of the solenoid is controlled by controlling the general output port or the external output port. If feeding from a manual feeder, decide to insert the paper according to the operation of the manual sensor, and by driving the main motor, insert the paper in front of the feed sensor. While paper moves, occurrence of Jam is judged as below.

ITEM

JAM 0

JAM 1

Description

- After picking up, paper cannot be entered due to paper is not fed.

- After picking up, paper entered but it cannot reach to the feed sensor in certain time due to slip, etc.

- After picking up, if the feed sensor is not on, re-pick up. After re-picking up, if the feed sensor is not on after certain time, it is JAM 0.

* It is a status that the leading edge of the paper doesn’t pass the feed sensor.

- Even though the paper reaches to the feed sensor, the feed sensor doesn’t be ON.

* It is a status that the leading edge of the paper already passes the feed sensor.

- After the leading edge of the paper passes the feed sensor, the trailing edge of the paper cannot pass the feed sensor after a certain time. (The feed sensor cannot be OFF)

- After the leading edge of the paper passes the feed sensor, the paper cannot reach the exit sensor after certain time. (The exit sensor cannot be ON)

* The paper exists between the feed sensor and the exit sensor.

JAM 2

- After the trailing edge of the paper passes the feed sensor, the paper cannot pass the exit sensor after certain time.

DUPLEX

JAM 1

- After the trailing edge of the paper passes the exit sensor, the leading edge of the paper cannot reach the duplex sensor after certain time.

DUPLEX

JAM 0

- After the leading edge of the paper passes the duplex sensor, the leading edge of the paper cannot reach the feed sensor after certain time.

3.3.3.1.2 Driver

By gearing, the main motor drives the rollers such as feeding roller, developing roller, fuser roller, and exiting roller.

The step motor is controlled for the such acceleration section and steady section. In the initial stage of the motor run, appoint the acceleration section to prevent the step-out of the motor. It is controlled by the A 3977 motor driver IC. The step signal and the enable signal are sent to make the phase for driving the motor in CPU.

3.3.3.1.3 Transfer

The charging voltage, developing voltage and the transfer voltage are controlled by PWM (Pulse Width

Modulation). The each output voltage is changeable due to the PWM duty. The transfer voltage admitted when the paper passes the transfer roller is decided by environment recognition. The resistance value of the transfer roller is changed due to the surrounding environment or the environment of the set, and the voltage value, which changes due to the environments, is changed through AD converter. The voltage value for impressing to the transfer roller is decided by the changed value. Each voltage value is controlled according to 3.3.4.2 Timing Chart.

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Summary of Product

3.3.3.1.4 Fusing

The temperature change of the heat roller°Øs surface is changed to the resistance value through the thermistor.

By converting the voltage value, which impressed to the resistance, to the digital value through the AD converter, the temperature is decided. The AC power is controller by comparing the target temperature to the value from the thermistor. If the value from the thermistor is out of controlling range while controlling the fusing, the error stated in the below table occurs.

• Lamp Method

Error

OPEN HEAT ERROR

LOW HEAT ERROR

Description

- When warming up, it has been lower than 60 over 35 seconds

- StandbyIt has been lower than 130 over 10 seconds

- Printing

Up to 2 consecutive pages :

It has been lower than 155 over 7 seconds.

From 3 consecutive pages :

It has been 25 lower than the fixed fusing temperature over 7 seconds.

It has been higher than 230 over 10 seconds OVER HEAT ERROR

=>This can be changed in the future.

LCD Display

ENGINE FUSER ERROR

ENGINE LOW HEAT ERROR”

ENGINE OVERHEAT ERROR”

3.3.3.1.5 LSU

The LSU is consisted of the LD (Laser Diode) and the polygon motor control. When the printing signal occurs, it turns on the LD and drives the polygon motor. When the detector detects the beam, Hsync occurs. When the polygon motor speed becomes strady, Lready occurs. If two conditions are satisfied, the status are not satisfied, the error shown in below occurs.

Error Type

Polygon Motor Error

Hsync Error

Description

Whenthe polygon motor speed doesn t become steady

The polygon motor speed is steady but the Hsync is not generated

LCD Display

LSU NOT READY

HSYNC ERROR

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4

4. Alignment and Adjustments

Alignment & Adjustments

This chapter describes the main functions for service, such as the product maintenance method, the test output related to maintenance and repair, DCU using method, Jam removing method, and so on. It includes the contents of manual.

4.1 How to use EDC (Engine Diagnostic Control) Mode

4.1.1 EDC Setup

EDC(Engine Diagnostic Control, EDC will be used below) is considered to test and check whether each functions of machinery and h/w module are normal or not. All of the test function are able to be controlled by the keys and LCD window on the panel without any other kits. It’s developed for related engineers, not for users.

4.1.2 Entrance method for EDC

In order to enter the EDC mode, the entering method should be special because this mode is developed for engineers related, not for end users.

- Entering the mode, the message, COMPONENT TEST/Press Menu Key is displayed.

- In this mode, an engineer should press the Menu Key to search each function he would like to test.

• Usage

1. Check printer is powered on.

2. Wait until the printer becomes a ready mode.

3. Press Menu -> Stop -> Left -> Back -> Ok -> Right in order.

4. Confirm the message COMPONENT TEST/Press Menu Key is displayed.

5. Press Menu key.

6. Follow a usage for a function you would like to use.

* The procedure and content above can be changed according to the situation.

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Alignment & Adjustments

4.1.3 Cover Status

This function is to check all cover sand all doors status.

• Usage

1. Press the Arrow Keys ( ) until finding Component Test / 1.Cover Status message on the panel.

2. Press the OK Key , when it is found.

3. Press the Arrow keys until finding a suitable function (Refer to the table below).

4. Press the OK Key , when it is found.

5. Press the OK Key for execution or the Back key for return.

• Function

Function Name

Top Cover

Tray1 Cassette

Tray2 Cassette

Tray3 Cassette

Tray4 Cassette

Fuser Door

Description

If the cover is opened, Open message will be displayed and if not, Closed displayed.

If the Tray is opened, Open message will be displayed and if not, Closed displayed.

If the Tray is opened, Open message will be displayed and if not, Closed displayed.

If the Tray is opened, Open message will be displayed and if not, Closed displayed.

If the Tray is opened, Open message will be displayed and if not, Closed displayed.

If the Door is opened, Open message will be displayed and if not, Closed displayed.

Display(LCD)

Top Cover

[Closed]/[Open]

Tray1 Cassette

[Closed]/[Open]

Tray2 Cassette

[Closed]/[Open]

Tray3 Cassette

[Closed]/[Open]

Tray4 Cassette

[Closed]/[Open]

Fuser Door

[Closed]/[Open]

Remarks

• The procedure and content above can be changed according to the situation.

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Alignment & Adjustments

4.1.4 Sensor Status

These Functions are to check a current state (normal or not) of each Sensor.

• Usage

- The other sensors

1. Press the Arrow Keys ( ) until finding Component Test / 2.Sensor Status message on the panel.

2. Press the OK Key , when it is found.

3. Press the Arrow keys until finding a suitable function. (Refer to the table below)

4. Press the OK Key , when it is found.

3. Touch a sensor you would like to test.

4. Check the message on the LCD window for the state of it.

• Function

Sensor

RegiSensor

T1 FeedSensor

T2 FeedSensor

T3 FeedSensor

T4 FeedSensor

ExitSensor

DJam1Sensor

Out Bin Sensor

Bypass Empty

T1 Paper Empty

T2 Paper Empty

T3 Paper Empty

Description

See the message after touching the sensor.

Display (LCD)

Before touching After touching

Regi. Sensor

[Without Paper]

Regi. Sensor

[With Paper]

See the message after touching the sensor.

See the message after touching the sensor.

T1 Feed Sensor

[Without Paper]

T2 Feed Sensor

[Without Paper]

T1 Feed Sensor

[With Paper]

T2 Feed Sensor

[With Paper]

See the message after touching the sensor.

Remarks

See the message after touching the sensor.

See the message after touching the sensor.

See the message after touching the sensor.

T3 Feed Sensor

[Without Paper]

T4 Feed Sensor

[Without Paper]

Exit Sensor

[Without Paper]

DJam1 Sensor

[Without Paper]

T3 Feed Sensor

[With Paper]

T4 Feed Sensor

[With Paper]

Exit Sensor

[With Paper]

Djam1 Sensor

[With Paper]

See the message after touching the sensor.

See the message after touching the sensor.

See the message after touching the sensor.

See the message after touching the sensor.

See the message after touching the sensor.

OutBin. Sensor

[Normal]

Bypass Empty

[Empty]

T1 Paper Empty

[Empty]

T2 Paper Empty

[Empty]

T3 Paper Empty

[Empty]

OutBin Sensor

[Full]

Bypass Empty

[Present]

T1 Paper Empty

[Present]

T2 Paper Empty

[Present]

T3 Paper Empty

[Present]

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Alignment & Adjustments

Sensor

T4 Paper Empty

Description

See the message after touching the sensor.

Display (LCD)

Before touching After touching

T4 Paper Empty

[Empty]

T4 Paper Empty

[Present]

T1 PSize0 Sen.

See the message after touching the sensor.

Remarks

T1 PSize1 Sen.

See the message after touching the sensor.

T1 Psize0 Sen.

[Low]

T1 Psize1 Sen.

[Low]

T1 Psize0 Sen.

[High]

T1 Psize1 Sen.

[High]

T1 PSize2 Sen.

See the message after touching the sensor.

T2 PSize0 Sen.

T2 PSize1 Sen.

T2 PSize2 Sen.

See the message after touching the sensor.

See the message after touching the sensor.

See the message after touching the sensor.

T1 Psize2 Sen.

[Low]

T2 Psize0 Sen.

[Low]

T2 Psize1 Sen.

[Low]

T2 Psize2 Sen.

[Low]

T1 Psize2 Sen.

[High]

T2 Psize0 Sen.

[High]

T2 Psize1 Sen.

[High]

T2 Psize2 Sen.

[High]

T3 PSize0 Sen.

T3 PSize1 Sen.

T3 PSize2 Sen.

T4 PSize0 Sen.

See the message after touching the sensor.

See the message after touching the sensor.

See the message after touching the sensor.

See the message after touching the sensor.

T3 Psize0 Sen.

[Low]

T3 Psize1 Sen.

[Low]

T3 Psize2 Sen.

[Low]

T4 Psize0 Sen.

[Low]

T4 PSize1 Sen.

T4 PSize2 Sen.

See the message after touching the sensor.

See the message after touching the sensor.

T4 Psize1 Sen.

[Low]

T4 Psize2 Sen.

[Low]

TOP Margin Sen See the message after touching the sensor.

TOP Margin Sen.

[Without Paper]

DPX Detect Sen See the message after touching the sensor.

DPX Detect Sen

[Low]

T3 Psize0 Sen.

[High]

T3 Psize1 Sen.

[High]

T3 Psize2 Sen.

[High]

T4 Psize0 Sen.

[High]

T4 Psize1 Sen.

[High]

T4 Psize2 Sen.

[High]

TOP Margin Sen.

[With Paper]

DPX Detect Sen

[High]

* The procedure and content above can be changed according to the situation.

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Alignment & Adjustments

4.1.5 Motor Test

These functions are to check a current state (normal or not) of all motors.

• Usage

1. Press the Arrow Keys ( ) until finding Component Test / 3.Motor Test message on the panel.

2. Press the OK Key , when it is found.

3. Press the Arrow keys until finding a suitable function (Refer to the table below).

4. Press the OK Key , when it is found.

5. Press the OK Key for execution or the Back key for return.

• Function

Function Name Description Display(LCD)

Main Mtr Fwd.

Main Mtr Bwd.

Main Mtr Slow.

Dev Mtr Nor.

The motor will run on the forward direction or stop.

The motor will run on the backward direction or stop.

Main Mtr Fwd. [ON] / [OFF]

Main Mtr Bwd. [ON] / [OFF]

The motor will run on the forwarding direction by half speed. Main Mtr Slow. [ON] / [OFF]

The motor will run on the forwarding direction by normal speed. Dev Mtr Slow. [ON] / [OFF]

Dev Mtr Slow.

The motor will run on the forwarding direction by half speed.

Duplex Mtr Fwd.

The motor will run on the forwarding direction.

T2 Feed Motor

T3 Feed Motor

T4 Feed Motor

The motor will run on the forward direction or stop.

The motor will run on the forward direction or stop.

The tray2 motor will run on the forward direction or stop.

Dev Mtr Slow. [ON] / [OFF]

Duplex Mtr Fwd. [ON] / [OFF]

T2 Feed Motor [ON] / [OFF]

T3 Feed Motor [ON] / [OFF]

T Feed Motor [ON] / [OFF]

* The procedure and content above can be changed according to the situation.

4.1.6 Fan Test

These functions are to check a current state (normal or not) of all fans.

• Usage

1. Press the Arrow Keys ( ) until finding Component Test / 4.Fan Test message on the panel.

2. Press the OK Key , when it is found.

3. Press the Arrow keys until finding a suitable function (Refer to the table below).

4. Press the OK Key , when it is found.

5. Press the OK Key for execution or the Back key for return.

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Samsung Electronics

Alignment & Adjustments

• Function

Function Name

Fuser Fan

Fuser Fan Rdy

Description

The fan will run or stop.

Check whether the fan is in locked state.

SMPS Fan The fan will run or stop.

SMPS Fan Rdy Check whether the fan is in locked state.

Duplex Fan The fan will run or stop.

* The procedure and content above can be changed according to the situation.

Display(LCD)

Fuser Fan [ON] / [OFF]

Fuser Fan Rdy.

[Ready] / [Not Ready]

SMPS Fan [ON] / [OFF]

SMPS Fan Rdy.

[Ready] / [Not Ready]

Duplex Fan [ON] / [OFF]

4.1.7 Clutch / Sol

These functions are to check a current state (normal or not) of the solenoids and clutches.

• Usage

1. Press the Arrow Keys ( ) until finding Component Test / 5.Clutch/Sol Test message on the panel.

2. Press the OK Key , when it is found.

3. Press the Arrow keys until finding a suitable function. (Refer to the table below)

4. Press the OK Key , when it is found.

5. Press the OK Key for execution or the Back key for retun.

• Function

Function Name

T1 P-up Clutch

T2 P-up Clutch

T3 P-up Clutch

T4 P-up Clutch

Bypass Clutch

Duplex Sol.

Description

The clutch will run or stop.

The clutch will run or stop.

The clutch will run or stop.

The clutch will run or stop.

The clutch will run or stop.

The solenoid will run or stop.

* The procedure and content above can be changed according to the situation.

Display(LCD)

T1 P-up Clutch [ON] / [OFF]

T2 P-up Clutch [ON] / [OFF]

T3 P-up Clutch [ON] / [OFF]

T4 P-up Clutch [ON] / [OFF]

Bypass Clutch [ON] / [OFF]

Duplex Sol. [ON] / [OFF]

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4.1.8 Fuser Ctrl

This function is to check a current state (normal or not) of the fuser unit.

• Usage

1. Press the Arrow Keys ( ) until finding Component Test / 6.Fuser Ctrl message on the panel.

2. Press the OK Key , when it is found.

3. Press the Arrow keys until finding a suitable function. (Refer to the table below)

4. Press the OK Key , when it is found.

5. Press the OK Key for execution or the Back key for retun.

• Function

Function Name

Fuser Bias

Temp Control

Fuser Temp

Inner Temp

Description

The bias will have the saved value previously

The fuser unit will control the power for fixing and display the current temperature on the panel.

The target temperature is 160 .

The ADC will be displayed on the panel.

The ADC will be displayed on the panel.

* The procedure and content above can be changed according to the situation

Display(LCD) Remarks

Fuser Bias [ON] / [OFF]

Temp Control

[OFF] / [ON] [xxx]

Fuser Temp [xxx]

[xxx] is a current temperature.

[xxx] is it’s

ADC.

Inner Temp [xxx] [xxx] is it’s

ADC.

4.1.9 LSU

These functions are to check a current state (normal or not) of the Laser Scanning Unit.

• Usage

1. Press the Arrow Keys ( ) until finding Component Test / 7.LSU Control message on the panel.

2. Press the OK Key , when it is found.

3. Press the arrow keys until finding a suitable function. (Refer to the table below)

4. Press the OK Key , when it is found.

5. Press the OK Key for execution or the Cancel key for stop.

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Alignment & Adjustments

• Function

Function Name

LD Power 1&2

Laser Motor

Description

The LD will have the saved value previously

The motor will run or stop.

Laser Ready When Laser Scanning Unit is ready to print (Laser diode on, Stable polygon motor speed) the message,

Normal is displayed. On the other case Fault

* The procedure and content above can be changed according to the situation.

Display(LCD)

LD Power 1&2

[ON] / [OFF]

Laser Motor

[ON] / [OFF]

Laser Ready

[Normal]

Remarks

4.1.10 Deve Control

These functions are to check whether the control for HVPS is normal or not.

• Usage

1. Press the Arrow Keys ( ) until finding Component Test / 8.Deve Control message on the panel.

2. Press the OK Key , when it is found.

3. Press the arrow keys until finding a suitable function. (Refer to the table below)

4. Press the OK Key , when it is found.

5. Press the OK Key for execution or the Cancel key for stop.

• Function

Function Name

THV Plus Bias

Description

The bias will have the previously saved value.

THV Minus Bias

DEV Bias

DEV AC Bias

DEV Vpp Bias

MHV Bias

PTL

The bias will have the previously saved value.

The bias will have the previously saved value.

The bias will have the previously saved value.

The bias will have the previously saved value.

The bias will have the previously saved value.

The lamp will be lighted or not.

Display(LCD)

THV Plus Bias

[ON] / [OFF]

THV Minus Bias

[ON] / [OFF]

DEV Bias [ON] / [OFF]

DEV AC Bias

[ON] / [OFF]

DEV Vpp Bias

[ON] / [OFF]

MHV Bias [ON] / [OFF]

PTL [ON] / [OFF]

Remarks

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Alignment & Adjustments

Function Name

Erase Lamp

Description

The lamp will be lighted or not.

THV Read

MHV Read

The Adc will be displayed on the panel.

The Adc will be displayed on the panel.

* The procedure and content above can be changed according to the situation.

Display(LCD)

Erase Lamp [ON] / [OFF]

THV Read [xxx]

MHV Read [xxx]

Remarks

[xxx] is it’s ADC xxx] is it’s ADC

4.1.11 Print Test and Option version

These functions are to check a total print process state and the option s version.

• Usage

1. Press the Arrow Keys ( ) until finding Component Test / 10.Print Test message on the panel.

2. Press the OK Key , when it is found.

3. Press the arrow keys until finding a suitable function. (Refer to the table below)

4. Press the OK Key , when it is found.

5. Press the OK Key for execution or the Cancel key for stop.

• Function

Function Name

Pattern Print

T2 Version

T3 Version

T4 Version

Duplex Version

Description

The printer can print the previously saved mode

(Simplex or Duplex / Copy/ pattern kind)

This is the version for Tray2

This is the version for Tray3

This is the version for Tray4

This is the version for Duplex

* The procedure and content above can be changed according to the situation.

Display(LCD)

Pattern Print [ON]

Remarks

T2 Version [x.xx]

T3 Version [x.xx] x.xx is version.

x.xx is version.

T4 Version [x.xx] x.xx is version.

Duplex Version [x.xx] x.xx is version.

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Alignment & Adjustments

4.2 Paper Path

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Service Manual

<Jam 0>

❶ Cassette

❸ MPF

❺ LSU

❼ SMPS & HVPS Board

❷ Duplex

❹ Print Cartridge

❻ Fuser

❽ Duplex Solenoid

<Jam 1>

Samsung Electronics

Alignment & Adjustments

<Jam 2>

<Jam Duplex 1> <Jam Duplex 0>

• Simplex

1) A paper is fed from a cassette or MPF by a printing order.

2) The fed paper passes a paper feeding sensor.

- If the sensor does not operate after feeding the paper, the Jam0 occurs.

3) The paper passes a paper exit sensor, and it comes out from a machine.

- If the tailing edge of the paper does not come out from a machine after the leading edge of the paper passes the sensor, then certain time later, a Jam2 occurs.

• Duplex

1) A paper is fad from a cassette or MPF by a printing order.

2) The fed paper passes a paper feeding sensor.

- If the sensor does not operate after feeding the paper, a Jam0 occurs.

3) The paper that passes a paper exit sensor takes several printing processes, and moves to a paper exit sensor.

- If the sensor does not operate after certain time, a Jam 1 occurs.

4) If the paper does not discharge until the paper passes an exit roller and a Roller-Exit-F/Down, a

Jam 2 occurs.

5) The printing paper starts to be printed for duplex only by reversing rotation by an exit motor. The printing paper enters to a machine through an exit roller, and reaches to duplex sensor.

- If the printing paper cannot reach to the duplex sensor after certain time, a duplex Jam 1 occurs.

6) The printing paper that passes the duplex sensor reaches to a feed sensor again and a printing operation is tried over again.

- If the printing paper cannot reach to a feed sensor after certain time later, a duplex Jam 2 occurs.

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Alignment & Adjustments

4.2.1 Clearing Paper Jams

Note : When removing paper that is jammed in the printer, if possible always pull the paper in the direction that it normally moves so as not to damage internal components. Always pull firmly and evenly; do not jerk the paper. If the paper tears, ensure that all fragments of paper are removed; otherwise a jam will occur again.

When a paper jam occurs, the Status LED lights red. Open and close the top cover. The jammed paper automatically exits the printer. If the paper does not exit, check the display on the control panel. The message indicating the corresponding location of the paper jam appears. Refer to the table below to locate the paper jam and to clear it:

4.2.1.1 In the paper feed area

• In the Tray1

1. Pull the tray 1 open.

2. Remove the jammed paper by gently pulling it straight out. Make sure that all of the paper is properly aligned in the tray 1.

If the paper does not move when you pull, or if you do not see the paper in this area, check the fuser area around the toner cartridge.

3. Insert the tray 1 into the printer until it snaps into place. Printing automatically resumes.

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• In the optional tray

1. Pull the optional tray open.

2. Remove the jammed paper from the printer.

Alignment & Adjustments

3. Pull the upper tray half way out.

4. Pull the jammed paper straight up and out.

If the paper does not move when you pull, or if you do not see the paper in this area, stop and go to step 3.

5. Fully insert the trays back into the printer. Printing automatically resumes.

• In the multi-purpose tray

1. If the paper is not feeding properly, pull the paper out of the printer.

2. Open and close the top cover to resume printing.

3. Open and close the top cover.Printing can be resumed.

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Alignment & Adjustments

4.2.1.2 Around the printer cartridge

Note : The fuser area is hot. Take care when removing paper from the printer.

1. Open the top cover and pull the printer cartridge out.

3. Remove the jammed paper by gently pulling it straight out.

Caution : • To prevent damage to the printer cartridge, do not expose it to light for more than a few minutes. Cover it with a piece of paper, if necessary.

• Do not touch the green surface underside of the printer cartridge. Use the handle on the cartridge to avoid touching this area.

2. Carefully lift up the guide feed.

If you do not see the jammed paper or if there is any resistance removing the paper, stop pulling and go to the paper exit area.

4. Flip down the guide feed.

5. Replace the printer cartridge and close the top cover.

Printing automatically resumes.

Note : If it is difficult to reinstall the printer cartridge, make sure that the guide feed has been flipped back down into position.

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Alignment & Adjustments

4.2.1.3 In the paper exit area

1. Open and close the top cover. The jammed paper is automatically ejected from the printer.

2. Gently pull the paper out of the output tray.

3. Open the rear cover.

4. By pusing the fuser levers upwards, loosen the jammed paper. Then gently pull the paper straight out.

If you do not see the jammed paper or if there is any resistance when you pull, stop and go to the next step.

4.2.1.4 In the duplex unit area

• Duplex jam 0

1. Pull the duplex unit out of the printer.

2. Locate the jammed paper and remove it.

3. Insert the duplex unit into the slot.

4. Open and close the top cover. The printer will resume printing.

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Alignment & Adjustments

• Duplex jam 1

1. Open the rear cover.

2. Gently pull the jammed paper straight up.

3. Close the rear cover.

4. Open and close the top cover. The printer will resume printing.

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Alignment & Adjustments

4.3 Sample Pattern

This product has the several sample patterns for maintenance. With the sample patterns, check the existence of the abnormality. The patterns help to regularly maintain the product.

4.3.1 Information Pages

Your printer comes with a set of information pages that helps you solve printing problems and obtain the best results from your printer. You can access these pages from the printer’s front panel.

To print information pages:

1. On the printer’s front panel, press the Menu button, then press the Enter button to select Information.

2. Select Info Pages, then press the Enter button.

Slect key( ), tind to intormation menu.

Press Enter key, sutch to intormation page.

Press Enter key, the printing.

* 3. Select the appropriate information page, then press the Enter button to print.

* If installed The HDD, select press(1~3 times), then display intormation menu.

Note : Print the “Menu Map” to see other information pages available for printing.

4.3.2 Demo Pages

Your printer comes with a set of sample pages which demonstrate different functions.

To print sample pages:

1. On the printer’s front panel, press the Menu button, then press the OK button to select Information.

2. Select Demo Pages, then press the OK button.

3. Select the desired sample page, then press the OK button to print.

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Alignment & Adjustments

4.4 Periodic Defective Image

If the delinquent image regularly occurs in the printed-paper, it is due to delinquent or damaged roller.

Refer to the table in below and check the condition of the roller.

No

1

4

5

2

3

6

7

Roller

OPC Drum

Charge Roller

Supply Roller

Developing Roller

Transfer Roller

Heat Roller

Pressure Roller

Defective image

95 mm

38 mm

45 mm

43 mm

55 mm

126 mm

126 mm

Typical defect white spot on black image or black spot, image ghost black spot light or dark horizontal image band horizontal image band, image ghost image ghost

Black spot and image ghost black spot on the backside

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4

3

2

1

OPC Drum

Charge Roller

Supply Roller

Developing Roller

7

6

5

Transfer Roller

Heat Roller

Pressure Roller

<Rollers Layout>

Samsung Electronics

Alignment & Adjustments

4.5 Error Messages

Messages appear on the Smart Panel program window or the control panel display to indicate the printer’s status or errors. Refer to the tables below to understand the messages’ meaning and correct the problem if necessary. Messages and their meanings are listed in alphabetical order.

ADC Not Confirm Error

Door Open

There is a problem in your printer system.

Unplug the power cord and plug it back in.

If the problem persists, please call for service.

The top cover or rear cover is not securely Close the cover until it locks into place.

latched.

Paper has jammed during duplex printing.

Clear the jam. Duplex Jam 0

Check Inside

Duplex Jam 1

Open/Close Door

Fuser Door Open

Paper has jammed during duplex printing.

Clear the jam.

Fuser is Cleaning

Inner Temp. Open

Cycle Power

Inner Temp. Short

Cycle Power

Install Toner

Invalid Toner

Load [Size] In [Tray]

Load Manual

Press Cont Key

Low Heat Error

Cycle Power

The fuser door is not securely latched.

Open the rear cover and close the fuser door until it locks into place.

Your printer is printing a leaning sheet now.

Please wait a few minutes.

There is a problem in your printer system.

Unplug the power cord and plug it back in.

If the problem persists, please call for service.

There is a problem in your printer system.

Unplug the power cord and plug it back in.

If the problem persists, please call for service.

A toner cartridge is not installed.

View of when the inner terminal of the set and the DEVE is not connected properly.

The toner cartridge you have installed is not for your printer.

The paper size specified in the printer properties does not match the paper you are loading.

Install a toner cartridge.

Check if there is any deformity at the inner terminal of the set, of check the

CRUM at the DEVE for any polluted areas.

Install a Samsung-genuine toner cartridge, designed for your printer.

Load the correct paper in the tray.

The multi-purpose tray is empty in manual Load a sheet of print media and press OK.

feed mode.

You need to press OK each page to be printed.

There is a problem in the fuser unit.

Unplug the power cord and plug it back in.

If the problem persists, please call for service.

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Alignment & Adjustments

LSU Motor Error

Cycle Power

MP Tray

Paper Empty

OPC is Cleaning

Open Heat Error

Cycle Power

Out-Bin Full

Over Heat Error

Cycle Power

Paper Exit Jam 1

Open/Close Door

Paper Jam 0

Open/Close Door

Paper Jam 1

Open/Close Door

Paper Jam 2

Check Inside

Paper [Tray] Jam

Open [Tray]

Printing...

Ready

Replace Toner

Self Diagnostic

LSU

Self Diagnostic

Temperature

Sleeping...

A problem has occurred in the LSU

(Laser Scanning Unit).

Unplug the power cord and plug it back in.

If the problem persists, please call for service.

There is no paper in the multi-purpose tray.

Load paper in the multi-purpose tray.

Your printer is printing a cleaning sheet now.

There is a problem in the fuser unit.

The output tray is full.

There is a problem in the fuser unit.

Please wait a few minutes.

Unplug the power cord and plug it back in.

If the problem persists, please call for service.

It can hold up to 250 sheets of plain paper. Once the paper is removed from the output tray, the printer resumes printing.

Unplug the power cord and plug it back in.

If the problem persists, please call for service.

Clear the jam.

Paper has jammed before reaching to the exit sensor.

Paper has jammed in the feeding area of the tray.

Paper has jammed in the fuser area.

Clear the jam.

Clear the jam.

Paper has jammed in the paper exit area.

Clear the jam.

Paper has jammed in the displayed optional tray.

The printer is printing jobs.

The printer is on-line and ready to print.

This message appears between the Toner Replace the toner cartridge with a new

Empty status.

one.

Please wait a few minutes.

The LSU (Laser Scanning Unit) in your printer is checking some problems detected.

The engine in your printer is checking some problems detected.

The printer is in power save mode.

Clear the jam.

Complete your printing.

Use your printer.

Please wait a few minutes.

When data is received, it switches to on-line automatically.

4-20

Service Manual

Samsung Electronics

Alignment & Adjustments

Toner Emhaust

Toner Low

[Tray]

Cassette Out

[Tray]

Paper Empty

Warming Up

Please Wait...

The life of the toner cartridge in end.

The displayed toner cartridge is almost empty.

The displayed tray is open.

Replace the toner cartridge with a new one

Take out the toner cartridge and thoroughly shake it. By doing this, you can temporarily reestablish printing operations.

Close the tray until it locks into place.

There is no paper in the tray.

Your printer is warming up now.

Load paper in the tray.

Please wait a few minutes.

Samsung Electronics

Service Manual

4-21

Disassembly and Reassembly 5

5. Disassembly and Reassembly

5.1 General Precautions on Disassembly

When you disassemble and reassemble components, you must use extreme caution. The close proximity of cables to moving parts makes proper routing a must.

Releasing Plastic Latches

Many of the parts are held in place with plastic latches. The latches break easily; release them

If components are removed, any cables disturbed carefully. by the procedure must be restored as close as

To remove such parts, press the hook end of the possible to their original positions. Before removlatch away from the part to which it is latched.

ing any component from the machine, note the cable routing that will be affected.

Whenever servicing the machine, you must perform as follows:

1. Check to verify that documents are not stored in memory.

2. Be sure to remove the print cartridge before you disassemble parts.

3. Unplug the power cord.

4. Use a flat and clean surface.

5. Replace only with authorized components.

6. Do not force plastic-material components.

7. Make sure all components are in their proper position.

Service Manual

5-1

Samsung Electronics

Disassembly and Reassembly

5.2 Transfer Roller

1. Open the Open Cover.

Open Cover

2. Hold the lever at both ends of the roller, then remove the roller.

Holder

Transfer Roller

<Cautions When Replacing a Transfer Roller>

* Do not grab the Transfer Roller shown in picture (A).

It may cause a malfunction due to a foreign object.

* Hold the both side of the Transfer Roller shown in picture (B) when replacing it.

Transfer Roller

5-2

Service Manual

(A) (B)

Samsung Electronics

5.3 MPF Ass’y

1. Open the MPF Ass'y.

MPF Ass’y

Disassembly and Reassembly

3. Remove the Tray Link from the MP Cover.

Tray Link

2. Remove two springs from the Knock Up Plate Ass'y.

4. Push the MP Cover and remove it, as shown below.

MP Cover

Service Manual

5-3

Samsung Electronics

Disassembly and Reassembly

5. Remove MP Cover in the direction of arrow, as shown below.

* NOTICE : Do not separate the spring from the MP Pick Up

Rack for convenience of assembling. Locate the hook section of the spring that is connected to the Knock Up Plate

Ass'y as shown in the outside for convenience of assembling.

MP Pick Up Rack

Knock Up Plate Ass’y

Tray Link

5.4 Holder Pad Ass'y

1. Before you remove the Holder Pad Ass'y, you should remove : -MPFAss'y (Refer to the5.3)

2. Unplug the connector and remove the three screws, as shown below.

3. Remove the Photo Interrupter and the MP Actuator, as shown below.

Friction Pad

MP Actuator

Holder Pad Ass’y

5-4

Service Manual

Samsung Electronics

5.5 Roller Idle ASS'Y

1. Remove the Roller Ass'y, as shown below.

Disassembly and Reassembly

2. Releasse the lock as shown below and take out the retard Ass’y.

Roller Idle ASS’Y

Samsung Electronics

Service Manual

5-5

Disassembly and Reassembly

5.6 Feed2 Idle Unit

1. Before you remove the Feed2 Idle Unit, you should remove :

- Holder Pad Ass'y (Refer to the 5.4)

2. Remove four screws. Then lift the Idle Unit, as shown below.

Feed2 Idle Unit

5-6

Service Manual

Samsung Electronics

5.7 Cover Right

1. Pull the Cassette out of the printer.

Disassembly and Reassembly

3. Remove two screws and take out the right side, as shown below.

Cassette

2. Remove the Cover Dummy and Cover Control Box.

Cover Control Box

Cover Right

Service Manual

5-7

Samsung Electronics

Disassembly and Reassembly

5.8 Main PBA

1. Before you remove the Main PBA, you should remove: - Cover Right (Refer to the 5.7)

2. Unplug the all Connectors, as shown below.

4. Remove two screws and take out the Dummy

Bracket.

BRACKET

NIC HOLE

3. The Connectors are located, as shown below.

Key Panel

Cover Open

DPX_SOL

DEVE

Motor

PTL

SMPS/HVPS

PBA

Key Panel

Network

Card

HDD(Optional)

Duplex

Thermistor

LSU

Toner

Sensor

USB

Port

Exit Sensor

Main Motor

Connector

PBA

P1284

Port

Connector

SCF

Memory(Optional)

5. Remove six screws and take out the Main PBA.

Main PBA

5-8

Service Manual

Samsung Electronics

Disassembly and Reassembly

5.9 Main Drive Ass'y

1. Before you remove the Main Drive Ass'y, you should remove :

- Cover Right (Refer to the 5.7)

2. Unplug the Connector from the Main Motor Ass'y, as shown below.

4. Remove five screws and take out the Main Drive

Ass'y.

Main Drive

Ass’y

Motor

Connector

Notice : Make sure the Power Switch is turned off before disassembling the Motor Connector.

3. Remove the Feed1 Gear, as shown below.

5. When separating the Main Motor Ass'y, disconnect the Connector from the Main Motor Ass'y, remove four screws, and then remove the Main Motor Ass'y.

Main Motor

Ass’y

Service Manual

5-9

Samsung Electronics

Feed1 Gear

Disassembly and Reassembly

5.10 DEVE Drive Ass'y

1. Before you remove the DEVE Drive Ass'y, you should remove : - Cover Right (Refer to the 5.7)

2. Unplug the Connector from the DEVE Motor Ass'y, as shown below.

4. When separating the DEVE Motor Ass'y, disconnect the Connector from the DEVE Motor Ass'y, remove three screws, and then remove the DEVE Motor

Ass'y.

DEVE Motor

Ass’y

Notice : Make sure the Power Switch is turned off before disassembling the Motor Connector.

3. Remove four screws and take out the DEVE Drive

Ass'y.

DEVE Drive

Ass’y

5-10

Service Manual

Samsung Electronics

Disassembly and Reassembly

5.11 Connector PBA

1. Before you remove the Connector PBA, you should remove : - Cover Right (Refer to the 5.7)

2. Unplug the all Connectors from the Connector PBA and take it out.

3. The Connectors are located, as shown below.

Main Solenoid

MP Solenoid

Main Clutch

MP Empty

Cassette

Open S/W

Connector

PBA

Main PBA

Samsung Electronics

Service Manual

5-11

Disassembly and Reassembly

5.12 Solenoid

1. Before you remove the Solenoid, you should remove:

- Cover Right (Refer to the 5.7)

- Main Drive Ass'y (Refer to the 5.9)

2. Unplug the MP Solenoid Harness and the Main

Solenoid Harness from the Connector PBA.

4. Remove one screws and take out the Main Solenoid.

Main Solenoid

MP Solenoid

Connector PBA

Main Solenoid

*NOTICE : It is not necessary to disassemble the Main Drive

Ass'y to remove the MP Solenoid.

3. Remove one screws and take out the MP Solenoid.

MP Solenoid

5-12

Service Manual

Samsung Electronics

Disassembly and Reassembly

5.13 Rear Cover

1. Open the Rear Cover, and then take out the Stopper.

1 ie Stopper

2

2. Remove the Rear Cover in the direction of arrow

Rear Cover

1

2

Samsung Electronics

Service Manual

5-13

Disassembly and Reassembly

5.14 Cover Left

1. Pull the Cassette out of the printer.

3. Take out the Cover Left.

Cover-Left

Cassette

2. Remove two screws and take out the left side.

5-14

Service Manual

Samsung Electronics

Disassembly and Reassembly

5.15 Top Cover

1. Before you remove the Top Cover, you should remove:

- Rear Cover (Refer to the 5.14)

- Cover Right (Refer to the 5.7)

- Cover Left (Refer to the 5.13)

2. Open the MPF Ass'y, the Rear Cover, the Open Cover.

4. Unlatch both ends of the Top Cover.

Open Cover

MPF Ass’y

3. Unplug the two Connectors after you remove the three screws from the Main PBA.

5. Unlatch the hook and take out the Top Cover.

Samsung Electronics

Key Panel

Service Manual

5-15

Disassembly and Reassembly

6. Remove seven screws and then take out the LCD

Panel and the Key Panel.

LCD Panel

Key Panel

5.16 Open Cover

1. Before you remove the Open Cover, you should remove:

- Top Cover (Refer to the 5.15)

2. Remove two screws and take out the Stopper.

3. Take out the Open Cover, as shown below.

Open Cover

Stopper

5-16

Service Manual

Samsung Electronics

5.17 Inner Cover

1. Before you remove the Inner Cover, you should remove:

-MPFAss'y (Refer to the5.3)

- Top Cover (Refer to the 5.15)

2. Remove two screws and take out the Inner Cover.

Inner Cover

Disassembly and Reassembly

Samsung Electronics

Service Manual

5-17

Disassembly and Reassembly

5.18 Fuser Ass'y

1. Before you remove the Fuser Ass'y, you should remove:

- Rear Cover (Refer to the 5.14)

2. Pull the Locking Lever. Then take out the Fuser Ass'y, as shown below.

Fuser Ass’y

4. Remove two screws securing the Electrode L, R and remove it, as shown below.

Harness L

Bush

Electrode

Harness R

Thrmistor

Connector

3. Remove two screws and take the Thermostat out of the Fuser Ass'y.

5. Remove two screws securing the Fuser Upper Unit and remove it, as shown below.

Fuser Upper Unit

Thermostat

1

2

Fuser Lower Unit

5-18

Service Manual

Samsung Electronics

Disassembly and Reassembly

6. Remove two screws securing the Release Lever L,R and remove it, as shown below.

Pressure Roller

8. Take out the Heat Roller Ass'y, as shown below.

Cover-Fuser Upper

Bearing

Release Lever L

Cover-Fuser Lower

Release Lever R

7. Remove two screws and take out the Gear Bracket.

Heat Roller Ass’y

Fuser Gear

9. Remove the screw securing the Thermistor and remove it, as shown below.

Gear Bracket

Thermistor

Samsung Electronics

Service Manual

5-19

Disassembly and Reassembly

5.19 Duplex Solenoid Ass'y

1. Before you remove the Exit Solenoid Ass'y, you should remove:

- Top Cover (Refer to the 5.15)

2. Unplug the Duplex Solenoid Harness from the Main

PBA.

Duplex

Solenoid

4. Remove spring pin and remove two screws and take out the Exit Solenoid.

Duplex Solenoid

Spring pin

3. Remove three screws and take out the Exit Solenoid

Ass'y.

Duplex Solenoid

Ass’y

5-20

Service Manual

Samsung Electronics

Disassembly and Reassembly

5.20 Exit Roller

1. Before you remove the Exit Roller, you should remove:

- Top Cover (Refer to the 5.15)

2. Take out the Actuator.

Actuator

4. Release the Exit Gear, as shown below.

Bearing

1

2

Exit Gear

5. Remove the Duplex Exit Roller as same method.

Duplex

Exit Roller

3. Remove the Exit Roller and Bearing, as shown below.

Exit Roller

Rack-Exit Roller

Bearing

Bearing

6. Release the Duplex Exit Gear, as shown below.

Bearing

1

2

Duplex Exit Gear

Service Manual

5-21

Samsung Electronics

Disassembly and Reassembly

5.21 LSU

1. Before you remove the LSU, you should remove:

- Rear Cover (Refer to the 5.14)

- Cover Right (Refer to the 5.7)

- Cover Left (Refer to the 5.13)

- Top Cover (Refer to the 5.15)

2. Remove the Cover-Frame Exit and unplug the

Cover Frame Exit

3. Remove three screws and take out the LSU.

LSU

LSU

Connector from the Main PBA, as shown below.

5-22

Service Manual

Samsung Electronics

Disassembly and Reassembly

5.22 DC Fan

1. Before you remove the DC Fan, you should remove:

- Cover Right (Refer to the 5.7)

- Cover Left (Refer to the 5.13)

- Cover Rear (Refer to the 5.14)

2. Unplug the two Connectors from the Toner Sensor

PBA.

3. Remove the screw for taking out the Stopper, and then take out the DC Fan.

DC Fan

Stopper

Out Full

DC Fan

Toner Sensor

PBA

Samsung Electronics

Service Manual

5-23

Disassembly and Reassembly

5.23 Toner Sensor PBA

1. Before you remove the LSU, you should remove:

- Top Cover (Refer to the 5.15)

- LSU (Refer to the 5.21)

2. Unplug the all Connectors from the Toner Sensor

PBA.

4. Remove the screw securing the Cover Open PBA and remove it. Then unplug the Connector from the

Main PBA, as shown below.

Cover Open PBA

Harness Cover

Cover Open

Toner Sensor

PBA

3. Remove two screws and take out the Toner Sensor PBA.

Toner Sensor PBA

HV Small

Spring

5. Remove three screws and take out the LSU Lower

Cover.

LSU Lower

Cover

5-24

Service Manual

Samsung Electronics

Disassembly and Reassembly

5.24 REGI Ass'y

1. Before you remove the REGI Ass'y, you should remove:

- Top Cover (Refer to the 5.15)

2. Unplug the Harness and remove four screws, as shown below.

4. Take out the REGI Ass'y, as shown below.

REGI Ass’y

3. Release the lock as shown below and lift up the Gear

Cap.

5. Unplug the Harness, remove the screw and take out the PTL PBA.

PTL Upper

Terminal

PTL PBA

PTL PBA

Gear Cap

Samsung Electronics

Service Manual

5-25

Disassembly and Reassembly

5.25 MP Pick Up Ass'y

1. Before you remove the MP Pick Up Ass'y, you should remove:

- MPFAss'y (Refer to the5.3)

- Main Drive Ass'y (Refer to the 5.9)

- Top Cover (Refer to the 5.15)

- Inner Cover (Refer to the 5.17)

2. First of all remove two screws. Lift up the MP Pick Up

Shaft for taking out the MP Pick Up Rack.

MP Pick Up Rack

4. Remove the screw securing the Bracket and remove the Gear Ass'y, as shown below.

Bracket

Gear ass’y

Bearing

5. Slide the Cam to the right by pulling on the MP Pick

Up Shaft, as shown below.

3. Remove the locking equipment rotate the Bearing in the direction of arrow.

1

2

Idle-Cam

Bearing

5-26

Service Manual

Samsung Electronics

Disassembly and Reassembly

6. First lift the left side of the Shaft and then remove the

Shaft.

7. Push the Idle toward the ends of Shaft then take out the Housing, as shown below.

1

1

1

Housing

2

Idle

2

Samsung Electronics

Service Manual

5-27

Disassembly and Reassembly

5.26 Pick Up & Feed2 Ass'y

1. Before you remove the Pick Up Ass'y, you should remove:

- Main Drive Ass'y (Refer to the 5.9)

- Right Cover (Refer to the 5.7)

2. Remove the Gear-Pick Up Cam, as shown below.

4. Remove four screws securing the Bottom Cross Bar and remove it.

2

Battom Cross Bar

1

Gear-Pick Up Cam

3. Release the Pick Up Gear and remove the locking equipment rotate the Bearing in the direction of arrow, as shown below.

5. Remove the Actuator as shown below.

Actuator

2

1

2

Bearing

Feed2 Gear

1

5-28

Service Manual

Samsung Electronics

6. Remove four screws securing the Guide-P-Front.

Then take out the Pick Up Unit, as shown below.

Disassembly and Reassembly

9. Remove the Feed2 Ass'y, as shown below.

Ground-P-Pickup

1

Feed1 Roller

Ass’y

2

Bearing

Guide-M-Support

Shaft

Pick Up Unit

3

2

1

10. Remove four screws securing the Feed2 Unit and remove it, as shown below.

7. Remove two screws securing the Guide-M-Support and remove it.

Guide-P-Front

Guide-M-Support

8. Remove the Feed1 Ass'y, as shown below.

Bushing Feed

Guide-M-Support

1

Pickup Roller

Ass’y

2 Bearing

Shaft

E-ring

Samsung Electronics

Feed2 Unit

Service Manual

5-29

Disassembly and Reassembly

11. Remove the Roller Unit, as shown below.

Pick Up Frame

Roller Unit

5-30

Service Manual

Samsung Electronics

Disassembly and Reassembly

5.27 Engine Shield

1. Remove the Guide-P-Front.(Refer to the 5.16.7)

2. Remove six screws and slightly lift the Engine Shield, as shown below.

4. Unplug the all Connectors from the Engine PBA.

Then take out the Engine Shield Ass'y.

Engine Shield

Ass’y

3. Remove the Duplex Guide L, R, as shown below.

2

Engine Shield Ass’y

5. Remove four screws and take out the Engine PBA out of the Shield.

Engine PBA

1

Guide-Duplex L

Guide-Duplex R

Shield

Samsung Electronics

Service Manual

5-31

6

6. Troubleshooting

6.1 Procedure of Checking the Symptoms

Before attempting to repair the printer first obtain a detailed description of the problem from the customer.

Troubleshooting

Power On

- No Power

- Power Module error

- Main PBA error

- LCD Panel error

OP Panel

ON?

Refer to

Error Massage

<Chapter 4.5>

Ready or

Power save

Indicate

Error Massage

Test Print printing

Quality is

Nomal?

Refer to "Solution of Image Problem"

END

Service Manual

6-1

Samsung Electronics

Troubleshooting

6.2 The cause and solution of Bad image

6.2.1 Vertical Black Line and Band

• Description

1. Straight thin black vertical line occurs in the printing.

2. Dark black vertical band occur in the printing.

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Check and Cause

1. Deformed Doctor-blade or cleaning-blade, in print cartridge

2. Scratched surface of the charge roller in the print cartridge.

3. Partly depression or deformation on the surface of the transfer roller.

6.2.2 Vertical White Line

Solution

1. If causes 1 and 2 occur in the print cartridge, replace the print cartridge and try to print out.

2. Replace the transfer roller if occurred as

No. 3.

• Description White vertical voids in the image.

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Check and Cause

1. Foreign matter stuck onto the window of internal lenses of LSU mirror.

2. Foreign matter or toner particles between the print cartridge roller and blade.

(In case the life of the print cartridge has been expired, white lines or light image occur in front of the image.)

3. It may occur when Burr and foreign substances are on the window of the print cartridge frame.

4. If the fuser is defective, voids occur periodically at the top of a black image.

5. It may occur when foreign substances are on the OPC Drum.

6. Partly depression or deformation on the surface of the transfer roller

Solution

1. Foreign matter stuck onto the window :

Clean the LSU window with recommended cleaner(IPA) Clean the window with a clean cotton swab.

2.. Replace the print cartridge.

3. No 3. : Remove the foreign matter and burr of the exposure window.

(print cartridge)

4. No. 4. : Open the front cover and check ribs that corresponds to the position of the voids. Remove if found.

5. If the problems are not solved, replace the print cartridge.

6. Replace the transfer roller if occured as

NO.6

6 -2

Service Manual

Samsung Electronics

Troubleshooting

6.2.3 Horizontal Black Band

• Description

1. Dark or blurry horizontal stripes occur in the printing periodically.

(They may not occur periodically.)

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Check and Cause

1. Bad contacts of the voltage terminals to print cartridge.

2. The rollers of print cartridge may be stained.

Charge roller = 38mm

Develop roller = 45mm

Transfer roller = 55mm

OPC Drum = 95mm

Solution

1. Clean each voltage terminal of the Charge,

Supply, Develop and Transfer roller.

(remove the toner particles and paper particles)

2. Clean the right Gear that has relatively small gap of the teeth in the OPC.

3. If the malfunction persists, replace the print cartridge.

6.2.4 Black/White Spot

• Description

1. Dark or blurry black spots occur periodically in the printing.

2. White spots occur periodically in the printing.

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Check and Cause

1. If dark or blurry black spots occur periodically, the rollers in the print cartridge may be contaminated with foreign matte or paper particles.

( Charge roller : 38 mm interval

OPC drum : 95 mm interval)

2. If faded areas or voids occur in a black image at intervals of 95 mm, or black spots occur elsewhere, the OPC drum surface is damaged.

3. If a black image is partially broken, the transfer voltage is abnormal or the transfer roller's life has expired.

Solution

1. Run OPC cleaning Mode Print and run the

Self-test 2 or 3 times.

2. In case of 95 mm interval unremovable in

1, cleanly remove foreign substances stuck on the OPC location equivalent to black spots and white spots with a dry duster.

3. The transfer roller guarantees 150,000 sheets printing in normal environment. If the roller's life is expired, replace it.

4. In case of 38 mm interval unremovable in

1, take measures as to replace the print cartridge and try to print out.

5. Clean the inside of the set against the paper particles and foreign matter in order not to cause the trouble.

Service Manual

6-3

Samsung Electronics

Troubleshooting

6.2.5 Light Image

• Description The printed image is light, with no ghost.

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Check and Cause

1. Develop roller is stained when the toner of print cartridge is almost consumed.

2. Ambient temperature is below than 10°C.

Solution

1. Check if the Toner Save mode is off.

Check if the density is light.

2. No 1 : Replace the print cartridge and try to print out.

3. No 2 : Wait 30 minutes after printer is powered on before you start printing.

3. Bad contact caused by the toner stains between the high voltage terminal in the

HVPS and the one in the set.

4. Abnormal output from the HVPS.

(Run self-test and check 1~4)

5. Check warranty out.

4. No3 : Clean up the contaminated area by the toner.

5. Replace the HVPS if the problems are not solved by the above four instructions.

6. Replace print cartridge.

6.2.6 Dark Image or a Black Page

• Description The printed image is dark.

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Check and Cause

1. No charge voltage in the engine board.

Solution

1. Check the state of the connector which connects the engine board and HVPS.

2. Charge voltage is not turned on due to the bad contacts between power supply in the side of the print cartridge and charge terminal of HVPS.

2. Clean the high voltage charge terminal.

3. Replace the HVPS if not solved by the above direction 1 and 2.

3. VD0 signal of the Main PBA is Low state. 4. Replace the LSU Unit or Main PBA.

4. Case back side the cleaning blade of print cartridge.

5. Replace print cartridge.

6-4

Samsung Electronics

Service Manual

6-3

Troubleshooting

6.2.7 Uneven Density

• Description Print density is uneven between left and right.

Check and Cause

1. The pressure force on the left and right springs of the transfer roller is not even, the springs are damaged, the transfer roller is improperly installed, or the transfer roller bushing or holder is damaged.

2. The life of the print cartridge has expired.

Solution

1. Replace both the left and right Spring

Holder.

2. Occur in the print cartridge gently shake the print cartridge.

3. The toner level is not even on the print cartridge roller due to the bad blade.

3.Replace the print cartridge and try to print out.

6.2.8 Background

• Description Light dark background appears in whole area of the printing.

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Check and Cause

1. Does character exist less than 2% coverage per a page, and hasn’t it been used long time?

(see the configuration sheet)

2. Is a recycled print cartridge be used?

3. Has the life span of the print cartridge ended?

4. Is the movement(Up and Down) of the transfer roller smooth?

5. Is the HVPS normal?

Solution

1. The print cartridge is basically designed to print 20,000 pages with

5% coverage. If it prints more than

23,000 pages with 2% coverage, a background can occur.

2. The A/S is not guaranteed if using a recyled the print cartridger.

3. Replace the print cartridge when the life span of it has been ended.

4. Clean the bushing part of the transfer roller.

5. If the problem is still not solved, replace the print cartridge.

Samsung Electronics

Service Manual

6-5

Troubleshooting

6.2.9 Ghost (1)

• Description Ghost occurs at 95 mm intervals of the OPC drum in the whole printing.

Digital Printer

Check and Cause

1. Bad contacts caused by contamination from toner particles between high voltage terminal in the main body and the electrode of the print cartridge.

2. Bad contacts caused by contamination from toner particles between high voltage terminal in the main body and the one in the HVPS board.

3. The life of print cartridge is expired.

Solution

1. Clean the terminals when contaminated by toner particles.

2. Occur in the print cartridge, replace the print cartridge and try to print out.

3. Replace the engine board if not solved by the above directions 1-2.

4. Transfer roller lifetime(150,000 sheets) has expired.

4. If not solved by the direction 3, check the transfer roller lifetime and replace it.

5. Abnormal low temperature(below 10°C).

6. Damaged cleaning blade in the print cartridge.

5. Wait about 1 hour after power on before using printer.

6. Occur in the print cartridge, replace the print cartridge and try to print out.

6.2.10 Ghost (2)

• Description

Ghost occurs at 95 mm intervals of the OPC drum in the whole printing.

(When printing on card stock or transparencies using manual feeder)

Digital Printer

Digital Printer

Check and Cause

When printing on card stock thicker than normal paper or transparencies such as OHP, higher transfer voltage is required.

Solution

Select Card stoc or OHP Film on paper type menu from the software application and after using returning to the original mode is recommended.

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Troubleshooting

6.2.11 Ghost (3) : Fuser

• Description Ghost occurs at 126 mm intervals.

Digital Printer

Digital Printer

Digital Printer

Check and Cause

The temperature of the fuser is maintained high.

Solution

1. Disassemble the fuser and remove the contaminated toner particles on the roller and clean the foreign matter between

Thermistor and Heat roller.

(Caution: can be deformed)

6.2.12 Stains on the Face of Page

• Description The background on the face of the printed page is stained.

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Check and Cause

1. Toner leakage due to improperly sealed print cartridge.

2. If the transfer roller is contaminated, stains on the face of page will occur.

Solution

1. Replace the print cartridge, and clean to the toner powder of machine.

2. If the transfer roller is contaminated, run

OPC Cleaning Mode Print 2 or 3 times.

And perform Self-Test 2 or 3 times to remove contamination.

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Troubleshooting

6.2.13 Stains on the Back of Page

• Description The back of the page is stained at 55 or 126 mm intervals.

Digital

Digital Pri

Digital Printer

Digital Printer

Digital Printer

Check and Cause

1. 55mm : Transfer roller is contaminated.

2. 126mm : Pressure roller is contaminated.

Solution

1.1. Perform the OPC Cleaning Mode Print 2 or 3 times. Run Self-Test to remove the contamination of the transfer roller.

1.2. Replace the transfer roller if contaminated severely.

2.1. Perform the fuser cleaning mode print 2 or

3 tiones.

2.2. Disassemble the fuser and clean the

H/R(Heat Roller) and P/R(Pressure roller).

And check the area between H/R and

Thermistor. If contaminated, clean the area not to be deformed.

6.2.14 Blank Page Print out (1)

• Description Blank page is printed.

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Check and Cause

Bad ground contacts in OPC and/or print cartridge.

Solution

1. Check if the Ground-OPC is defective(set inside left side).

2. Remove contamination of the terminals of the print cartridge and the unit.

6.2.15 Blank Page Print out (2)

• Description

1. Blank page is printed.

2. One or several blank pages are printed.

3. When the printer turns on, several blank pages print.

Check and Cause

1. Bad ground contacts in OPC and/or print cartridge.

2. Abnormal solenoid.

Solution

1. Remove contamination of the terminals of the print cartridge.

2. Perform the engine self test using EDC Mode to check if the Solenoid is normal.

3. If not solved by the above directions 1-2,

Replace the engine board.

4. Turn the power off, delete the data of PC and try printing again.

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6.3 The cause and solution of the bad discharge

6.3.1 Wrong Print Position

• Description Printing begins at wrong position on the paper.

Check and Cause

Wrong sense time caused by defective feed sensor actuator.

Solution

Replace the defective actuator

Troubleshooting

6.3.2 JAM 0

• Description

1. Paper is not exited from the cassette.

2. Jam-0 occurs if the paper feeds into the printer.

Check and Cause

1. Check the Main clutch by using EDC

Mode.

Solution

1. Replace the Main clutch.

2. Check if the pad is loose due to bad sealing of the side-pad.

2. Replace the side-pad Assembly L or

R, if necessary.

3. Check the surface of the roller-pickup for foreign matter.

3. Clean with soft cloth dampened with

IPA(Isopropyl Alcohol) or water.

4. If continuous clusters occur, check whether the assembly slot between shaft-pickup and housing-pickup opens or is broken away.

5. If the paper feeds into the printer and

Jam 0 occurs, perform EDC Mode to check feed-sensor of the engine board.

4. Replace the Main PBA and/or Sensor.

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Troubleshooting

6.3.3 JAM 1

• Description

1. Recording paper is jammed in front of or inside the fuser.

2. Recording paper is stuck in the discharge roller and in the fuser just after passing through the

Actuator-Feed.

Check and Cause

1. If the recording paper is jammed in front of or inside the fuser.

Solution

1. Replace the SMPS or Exit-Sensor.

2. If the recording paper is stuck in the discharge roller and the fuser just after passing through the Actuator-

Feed, Feed Actuator may be defective.

2. Replace the Main PBA.

3. Reassemble the Actuator-Feed and

Spring-Actuator if the movement is bad.

6.3.4 JAM 2

• Description

1. Recording paper is jammed in front of or inside the fuser.

2. Recording paper is stuck in the discharge roller and in the fuser just after passing through the

Actuator-Feed.

Check and Cause

1. If the paper is completely fed out of the printer, but Jam 2 occurs : Exit sensor is defective.

• After the paper is completely discharged, actuator Exit should return to the original position to shut the photo-sensor. Sometimes it takes longer hour than it should and does not return.

2. If the paper is rolled in the Fuser Roller:

• This occurs when a Guide claw is broken away or transformed.

• It occurs when the Spring of a Guide claw is broken away or transformed.

• It occurs when the Heat-Roller or

Pressure-Roller is seriously contaminated with the toner.

3. Paper is accordion in the fuser.

Solution

1. Check if the exit sensor actuator is defective.

• Check if the actuator exit is deformed

(Check if the lever part is deformed in shape).

• Check whether burrs occur in the assembly part of the actuator exit or not and if the actuator is smoothly operated.

• Check if foreign matter and wire get caught in the actuator exit's operation.

2. If the paper is stuck in the fuser : disassemble the fuser and remove the jammed paper, and clean the surface of the pressure roller with dry gauze.

3. Remove the jammed paper after disassembling the fuser : Clean the surface of the pressure roller with dry gauze.

• Remove the toner particles stained on the rib.

• Check the assemblage and performance of the exit.

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Troubleshooting

6.3.5 Duplex Jam 1

• Description A message 'Duplex Jam 1' is displayed in a LCD window.

Check and Cause

1. It is a case when a paper cannot operate a duplex sensor.

2. It is a case when a paper cannot reach to a duplex sensor due to a paper jam on a duplex path.

Solution

1. Replace a SMPS or main PBA

2. A case that a paper jam occurs on

(A) after it is reversed: replace a

2nd exit roller after checking its operation.

3. A case that a paper jam occurs on

(B) after it is reversed: replace a duplex roller after checking its operation

6.3.6 Duplex Jam 0

• Description A message 'Duplex Jam 2' is displayed in a LCD window.

Check and Cause

1. It is a case that a paper cannot pass a duplex sensor.

2. It is a case that a paper cannot reach to a registration sensor after it is passed a duplex sensor.

Solution

1. Replace a SMPS or main PBA.

2. A case that a leading edge of a paper is jammed on (A) check an operation of a guide front. If it is worn or defective, replace it.

3. Check an operation of a feed roller and a registration roller. If they are worn or defective replace them.

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Troubleshooting

6.3.7 Multi-Feeding

• Description Multiple sheets of paper are fed at once.

Check and Cause

1. Check the Guide side L/R or Guide Rear in the

Cassette, if the position is correct.

2. Solenoid malfunction(the solenoid does not work properly): Perform EDC Mode.

3. Pad-Friction is contaminated with foreign matter.(oil...)

Solution

1. Replace the solenoid if necessary.

2. Replace the Main PBA.

3. Clean the pad friction with soft cloth dampened with

IPA(Isopropyl Alcohol).

4. Use the smooth paper.

4. The face of paper is blended.

6.3.8 Paper rolled in the fuser

• Description If contaminated at intervals of 57mm on the back of a paper.

Check and Cause

1. Contamination of the pressure roller or heat roller (Background, Hot off set).

2. Check the claw of the fuser whether it is deformed.

Solution

1. After disassembling the fuser, clean contamination between the heat roller and the thermostor and remove the contamination of the pressure roller.

2. If there is heavy background, repair it by the background troubleshooting method.

3. Clean the surface of the heat roller with IPA or water

4. Check the warp or separation of the print claw and the holder plate claw, and then manage it.

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Troubleshooting

6.3.9 Paper rolled on the OPC Drum

• Description Paper is rolled up in the OPC.

Check and Cause

1. Paper is too much thin.

2. The face of paper is curled.

Solution

1. Recommend to use normal paper.

2. How to remove the rolled paper in the OPC.

• Remove the paper while turning the OPC against the ongoing direction.

• Clean fingerprints on the OPC softly with soft cloth dampened with tissue.

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Troubleshooting

6.4 The cause and solution of the malfunction

6.4.1 Fuser Error

• Description

A message “Engine Fuser Low Heat Error/Engine Fuser Over Heat Error” is displayed in a LCD panel.

Check and Cause

1. Check whether a thermostat, open or not.

2. Check whether a thermistor is open or not.

Solution

1. Replace the fuser if a thermostat is open.

3. Heat lamp ON/OFF test

4. It could not operate due to a gear of a fuser is melted.

2. Replace the fuser if a thermistor sensor is located deep inside of a sponge.

3. Check whether the overheat mode circuit operates normally or not.

4. Replace the fuser.

6.4.2 LSU Error

• Description A message “Engine Hsyne Error” is displayed in a LCD panel.

Check and Cause

1. Check whether the LSU connector is disconnected or not.

2. Check whether the LSU motor is rotating or not.

3. Check the HSYNC signal.

Solution

1. Connect the LSU harness properly.

2. Replace a LSU.

3. Replace a main board if the same error occurs again after replacing a LSU.

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6.4.3 Not function of the gear of the fuser due to melting away

• Description

The motor breaks away from its place due to gear melting away.

Check and Cause

1. Check the Fuser Unit.

1. Replace the Fuser.

Solution

2. Replace the Main PBA.

2. Replace the SMPS.

Troubleshooting

6.4.4 Paper Empty

• Description The paper lamp on the operator panel is on even when paper is loaded in the cassette.

Check and Cause

1. Bending or deformation of the actuator of the paper sensor.

2. The function of the engine board is defective

3. Check the connector and harness.

Solution

1. Replace the defective actuator.

2. Replace the empty sensor PBA.

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Troubleshooting

6.4.5 Paper Empty without indication

• Description

A message “Paper Empty” is displayed in a LCD panel.

The paper lamp on the operator panel does not come on when the paper cassette is empty.

Check and Cause

1. Bending or deformation of the actuator of the paper sensor.

2. Check the Main board.

3. Check the empty sensor board.

4. Check the toner sensor board.

Solution

1. Replace the defective actuator.

2. Replace the board which has a trouble.

6.4.6 Cover Open

• Description

A message “Colse Top Cover” is displayed in a LCD panel.

The ERROR lamp is on even when the print cover is closed.

Check and Cause

1. The hook lever in the top cover may be defective.

Solution

1. Replace the hook lever, if defective.

2. Check the main board

3. Check the cover open board.

4. Check the harness and connection.

2. Check the insertion of the cover open S/W connect.

3. Replace the main board or cover open board.

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Troubleshooting

6.4.7 No error message when the cover is open

• Description

The ERROR message does not come on even when the printer cover is open

Check and Cause

1. Check the cover open circuit on the main board.

2. Check the cover open board.

Solution

1. Check the insertion of the cover open S/W connect.

2. Replace the main control board or cover open board.

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Troubleshooting

6.4.8 Defective motor operation

• Description

Main motor is not driving when printing, and paper does not feed into the printer, resulting 'Jam 0'.

Check and Cause

1. The motor harness or motor PCB may be defective.

2. Check the motor operation in the EDC mode.

Solution

1. Replace the motor unit.

2. Replace the main PBA.

6.4.9 No Power

• Description When system power is turned on, all lamps on the operator panel do not come on.

Check and Cause

1. Check if the power input and SMPS output are normal.

1. Replace the SMPS.

Solution

2. Check the inferiority of LED-Panel or LDC window on the front-cover if the OP panel does not appear after normal warming-up.

2. Replace the control board.

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6.4.10 Vertical Line Getting Curved

• Description

When printing, vertical line gets curved.

Check and Cause

1. If the supply of +24v is unstable in the main control board linking with LSU, check drive by EDC mode: LSU check.

1. Replace LSU.

2. Chect the deve PBA in the print cartridge.

Solution

2. Replace the toner sensor PBA.

2. Replace the main PBA.

Troubleshooting

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Troubleshooting

6.5 Maintaining the toner cartridge

Toner cartridge storage

To get the most from the toner cartridge, keep the following guidelines in mind:

• Do not remove the toner cartridge from its package until ready for use.

• Do not refill the toner cartridge. The printer warranty does not cover damage caused by using a refilled cartridge.

• Store toner cartridge in the same environment as the printer.

• To prevent damage to the toner cartridge, do not expose it to light for more than a few minute.

Expected cartridge life

The life of the toner cartridge depends on the amount of toner that print jobs require. When printing text at ISO 19752

5% coverage, a new toner cartridge lasts an average of either 20,000 or 10,000 pages. (The original toner cartridge supplied with the printer lasts an average of 10,000 pages.) The actual number may also be different depending on the print density of the pages you print on, and the number of pages may be affected by operating environment, printing interval, media type, and media size. If you print a lot of graphics, you may need to change the cartridge more often.

Saving toner

To save toner, press Toner Save on the control panel. The button backlight turns on.

Using this feature extends the life of the toner cartridge and reduce your cost per page, but it also reduces print quality.

6.5.1 Checking the remaining toner

You can check the level of toner left in the cartridge.

If you are having print quality problems, this can help you determine if the problem is caused by low toner.

Following the key formation at the panel, note the toner remaining level on the cartridge information after taking out the configuration sheet. In other way to check, follow the TECH mode and out put the cartridge information.

The display shows the percentage of the remaining toner.

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Troubleshooting

6.5.2 Redistributing toner cartridge

When the toner cartridge is near the end of its life:

• White streaks and light printing occur.

• Toner Low appears on the display.

• The Smart Panel program window appears on the computer telling you that the toner level is low.

• The Status LED blinks red. If this happens, you can temporarily reestablish print quality by redistributing the remaining toner in the cartridge. In some cases, white streaks or light printing will still occur even after you have redistributed the toner.

1. Open the top cover.

2. Pull the toner cartridge out.

4. Hold the toner cartridge by the handle and slowly insert the cartridge into the opening in the printer.

Tabs on the sides of the cartridge and corresponding grooves within the printer will guide the cartridge into the correct position until it locks into place completely.

Caution : • Avoid reaching too far into the printer. The fusing area may be hot.

• To prevent damage to the toner cartridge, do not expose it to light for more than a few minutes. Cover it with a piece of paper, if necessary.

• Do not touch the green surface underside of the toner cartridge. Use the handle on the cartridge to avoid touching this area.

3. Thoroughly shake the cartridge 5 or 6 times to distribute the toner evenly inside the cartridge.

5. Close the top cover. Make sure that the cover is securely closed.

Note : If toner gets on your clothing, wipe it off with a dry cloth and wash clothing in cold water. Hot water sets toner into fabric.

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Troubleshooting

6.5.3 Replacing the toner cartridge

When the toner cartridge is completely empty:

• Replace Toner appears on the display.

• The Smart Panel program window appears on the computer telling you that the toner cartridge is empty.

• The Status LED lights red.

At this stage, the toner cartridge needs to be replaced. For order information for toner cartridges,

Note : This feature does not work for the Toner Empty message.

1. Open the top cover.

2. Pull the toner cartridge out.

4. Locate the sealing tape at the end of the toner cartridge. Carefully pull the tape completely out of the cartridge and discard it.

3. Remove the new toner cartridge from its bag.

Note : • The sealing tape should be longer than 60 cm when correctly removed.

• Holding the toner cartridge, pull the sealing tape straight to remove it form the cartridge. Be careful not to cut the tape. If this happens, you cannot use the toner cartridge.

• Refer to the helpful pictures on the cartridge wrapping paper.

5. Remove the flexible plastic holder out of the toner cartridge.

Caution : Do not use sharp objects, such as a knife or scissors, to open the toner cartridge package.

They might scratch the drum of the cartridge.

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Troubleshooting

6. Thoroughly shake the cartridge 5 or 6 times to distribute the toner evenly inside the cartridge.

Thoroughly roll the cartridge to assure maximum copies per cartridge. Save the box and the plastic bag for shipping.

Caution : • If toner gets on your clothing, wipe it off with a dry cloth and wash clothing in cold water.

Hot water sets toner into fabric.

• To prevent damage to the toner cartridge, do not expose it to light for more than a few minutes. Cover it with a piece of paper, if necessary.

• Do not touch the green surface underside of the toner cartridge. Use the handle on the cartridge to avoid touching this area.

7. Hold the toner cartridge by the handle and slowly insert the cartridge into the opening in the printer.

Tabs on the sides of the cartridge and corresponding grooves within the printer will guide the cartridge into the correct position until it locks into place completely.

8. Close the top cover. Make sure that the cover is securely closed.

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Troubleshooting

6.5.4 Toner Cartridge-related messages

Message Meaning

Install Toner A toner cartridge is not installed.

Invalid Toner

Toner Low

NonGenuine Toner

Stop

Install a toner cartridge.

Install a Samsung -genuine toner cartridge ,designed for your printer.

The toner cartridge you have installed is not for your printer.

The toner cartridge is almost empty.

Take out the toner cartridge and thoroughly shake it.By doing this,you can temporarily reestablish printing operations.

The toner cartridge installed is not a genuine cartridge.

You can select either Stop or Continue.If you do not select any,the printer will work as Stop is selected.

If you select Stop, you cannot print until the genuine cartridge is installed.However, you can still print any kind of reports.

If you select Continue, you can keep printing but the quality cannot be guaranteed, and the product support is no longer provided.

If you want to change the selection, turn the printer off and on to have this message appear again, and then re-select Stop or Continue.

NonGenuine Toner

Replace Toner1

NonGenuine Toner

Replace Toner

Toner Low

Replace Toner

Replace Toner

Toner Exhausted

Stop

Toner Exhausted

Replace Toner1

Toner Exhausted

Replace Toner

The toner cartridge installed is not a genuine cartridge.

The toner cartridge installed is not a genuine cartridge.

This message appears when you selected Stop at the NonGenuine

Toner prompt.

Install the genuine toner cartridge.

This message appears when you selected Continue at the NonGenuine

Toner prompt.

Install the genuine toner cartridge.

The toner in the cartridge has run out. Install a new genuine toner cartridge.

You can keep printing but the quality cannot be guaranteed, and the product support is no longer provided.

You can configure not to see the Toner Low Replace Toner message.

The toner cartridge installed is not a genuine cartridge.

This message appears when you turned off the Toner Low Replace

Toner message.

Install a new genuine toner cartridge.

You can keep printing but the quality cannot be guaranteed, and the product support is no longer provided.

The lifespan of the toner cartridge is reached.

You can select either Stop or Continue. If you do not select any, the printer will work as Stop is selected.

If you select Stop, you cannot print until the genuine cartridge is installed.

If you select Continue, you can keep printing but the quality cannot be guaranteed, and the product support is no longer provided.

If you want to change the selection, turn the printer off and on to have this message appear again, and then re-select Stop or Continue.

The lifespan of the toner cartridge is reached.

The lifespan of the toner cartridge is reached.

This message appears when you selected Stop at the Toner Exhausted prompt.

Install the genuine toner cartridge.

This message appears when you selected Continue at the Toner

Exhausted prompt.

Install the genuine toner cartridge.

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Troubleshooting

6.6 The cause and solutions of bad environment of the software

6.6.1 The printer is not working (1)

• Description

While Power turned on, the printer is not working in the printing mode.

Check and Cause

1. Run Self-Test Mode: Turn the power on while pressing the test printing button for 2 or 3 seconds before printing works.

Solution

1.Check the power of the printer and perform the Self-

Test. If the test printing works, that means no problems in the printer itself. If the test printing does not work, that means bad functioning of the printer(not because of software).

2. Check if the PC and the printer is properly connected and the print cartridge installed.

3. Printing is nor working in the Windows.

2. Replace the printer cable. If the problems not solved even after the cable replaced, check the amount of the remaining tone.

(refer to print cartridge Service 4-5)

3. Check if the connection between PC and printer port is proper. If you use windows, check if the printer driver in the controller is set up. If the printer driver is properly set up, check in which program the printing is not working. The best way to find out is to open the memo pad to check the function of printing. If it is not working in a certain program, adjust the setup the program requires. Sometimes, the printout is normal within the Windows basic programs, but it's not working in a particular program. In such case, install the new driver again. If not working in the Windows basic program, Check the setup of the port of CMOS is on

ECP. And check the address of IRQ 7 and 378

4. Check if the printer cable is directly connected to peripheral devices

4. If the scanner needs to be connected to the printer, first the remove the scanner from the PC to see if the printer is properly working alone.

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Troubleshooting

6.6.2 The printer is not working (2)

• Description

After receiving the printing order, no response at all or the low speed of printing occurs due to wrong setup of the environment rather than malfunction of the printer itself.

Check and Cause

1. Secure more space of the hard disk.

2. Printing error occurs even if there is enough space in the hard disk.

Solution

1. Not working with the message 'insufficient printer memory' means hard disk space problem rather than the RAM problem. In this case, provide more space for the hard disk. Secure more space using the disk utilities program.

2. The connection of the cable and printer port is not proper. Check if the connection is properly done and if the parallel port in CMOS is rightly set up.

3. Check the parallel-port-related items in the CMOS

Setup.

4. Reboot the system to print.

3. As a printer port, Select ECP or SPP among

SPP(Normal), ECP, and EPP modes(increase printing speed) SPP normal mode support 8-bit data transfer, while ECP Mode transfer the 12-bit data.

4. If the regular font is not printing, the cable or the printer driver may be defective.

Turn the PC and printer off, and reboot the system to print again. If not solved, double-click the printer in my computer If the regular fonts are not printed this time again. the cable must be defective so replace the cable with new one.

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Troubleshooting

6.6.3 Abnormal Printing

• Description

The printing is not working properly even when the cable has no problem.

(even after the cable is replaced)

If the printer won't work at all or the strange fonts are repeated, the printer driver may be defective or wrong setup in the CMOS Setup.

Check and Cause

1. Set up the parallel port in the CMOS SETUP.

Solution

1. Select SPP(Normal) or ECP LPT Port the among

ECP, EPP or SPP in the CMOS Setup.

2. Printer Driver Error.

2. Check the printer in My Computer.(to see if the printer driver is compatible to the present driver or delete the old driver, if defective and reinstall the new driver)

3. Error message from insufficient memory.

(The printing job sometimes stops or due to insufficient virtual memory, but it actually comes from the insufficient space of the hard disk.)

3. Delete the unnecessary files to secure enough space of the hard disk and start printing job again.

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Troubleshooting

6.6.4 SPOOL Error

• Description

To spool which stands for "simultaneous peripheral operations online" a computer document or task list (or "job") is to read it in and store it, usually on a hard disk or larger storage medium so that it can be printed or otherwise processed at a more convenient time (for example, when a printer is finished printing its current document).

Check and Cause

1. Insufficient space of the hard disk in the directory assigned for the basic spool.

Solution

1. Delete the unnecessary files to provide more space to start printing job.

2. If the previous printing error not solved.

3. When expected to collide with other program.

2. If there are some files with the extension name of

****.jnl, Delete them and Reboot the Windows to restart printing job.

3. Shut down all other programs except the current one, if possible.

4. Delete the printer driver completely and reinstall it.

4. When an application program or the printer driver is damaged.

5. When some files related to OS are damaged or virus infected.

5 After rebooting the computer, check for viruses, restore the damaged files and reinstall the program to do the printing job.

6. Memory is less than suggested one.

6. Add up enough memory to the PC.

How to delete the data in the spool manager.

In the spool manager, the installed drivers and the list of the documents waiting to be printed are shown.

Select the document to be deleted and check the delete menu.

If you intend to delete the current document being printed, the data being transferred to the printer will be put out and then the document is removed. Before choosing the document, the menu is still inactive.

Or put the document out of the list and repeat the routine as in the above or finish the spool manager.

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6

6. Troubleshooting

6.1 Procedure of Checking the Symptoms

Before attempting to repair the printer first obtain a detailed description of the problem from the customer.

Troubleshooting

Power On

- No Power

- Power Module error

- Main PBA error

- LCD Panel error

OP Panel

ON?

Refer to

Error Massage

<Chapter 4.5>

Ready or

Power save

Indicate

Error Massage

Test Print printing

Quality is

Nomal?

Refer to "Solution of Image Problem"

END

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Troubleshooting

6.2 The cause and solution of Bad image

6.2.1 Vertical Black Line and Band

• Description

1. Straight thin black vertical line occurs in the printing.

2. Dark black vertical band occur in the printing.

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Check and Cause

1. Deformed Doctor-blade or cleaning-blade, in print cartridge

2. Scratched surface of the charge roller in the print cartridge.

3. Partly depression or deformation on the surface of the transfer roller.

6.2.2 Vertical White Line

Solution

1. If causes 1 and 2 occur in the print cartridge, replace the print cartridge and try to print out.

2. Replace the transfer roller if occurred as

No. 3.

• Description White vertical voids in the image.

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Check and Cause

1. Foreign matter stuck onto the window of internal lenses of LSU mirror.

2. Foreign matter or toner particles between the print cartridge roller and blade.

(In case the life of the print cartridge has been expired, white lines or light image occur in front of the image.)

3. It may occur when Burr and foreign substances are on the window of the print cartridge frame.

4. If the fuser is defective, voids occur periodically at the top of a black image.

5. It may occur when foreign substances are on the OPC Drum.

6. Partly depression or deformation on the surface of the transfer roller

Solution

1. Foreign matter stuck onto the window :

Clean the LSU window with recommended cleaner(IPA) Clean the window with a clean cotton swab.

2.. Replace the print cartridge.

3. No 3. : Remove the foreign matter and burr of the exposure window.

(print cartridge)

4. No. 4. : Open the front cover and check ribs that corresponds to the position of the voids. Remove if found.

5. If the problems are not solved, replace the print cartridge.

6. Replace the transfer roller if occured as

NO.6

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Service Manual

Samsung Electronics

Troubleshooting

6.2.3 Horizontal Black Band

• Description

1. Dark or blurry horizontal stripes occur in the printing periodically.

(They may not occur periodically.)

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Check and Cause

1. Bad contacts of the voltage terminals to print cartridge.

2. The rollers of print cartridge may be stained.

Charge roller = 38mm

Develop roller = 45mm

Transfer roller = 55mm

OPC Drum = 95mm

Solution

1. Clean each voltage terminal of the Charge,

Supply, Develop and Transfer roller.

(remove the toner particles and paper particles)

2. Clean the right Gear that has relatively small gap of the teeth in the OPC.

3. If the malfunction persists, replace the print cartridge.

6.2.4 Black/White Spot

• Description

1. Dark or blurry black spots occur periodically in the printing.

2. White spots occur periodically in the printing.

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Check and Cause

1. If dark or blurry black spots occur periodically, the rollers in the print cartridge may be contaminated with foreign matte or paper particles.

( Charge roller : 38 mm interval

OPC drum : 95 mm interval)

2. If faded areas or voids occur in a black image at intervals of 95 mm, or black spots occur elsewhere, the OPC drum surface is damaged.

3. If a black image is partially broken, the transfer voltage is abnormal or the transfer roller's life has expired.

Solution

1. Run OPC cleaning Mode Print and run the

Self-test 2 or 3 times.

2. In case of 95 mm interval unremovable in

1, cleanly remove foreign substances stuck on the OPC location equivalent to black spots and white spots with a dry duster.

3. The transfer roller guarantees 150,000 sheets printing in normal environment. If the roller's life is expired, replace it.

4. In case of 38 mm interval unremovable in

1, take measures as to replace the print cartridge and try to print out.

5. Clean the inside of the set against the paper particles and foreign matter in order not to cause the trouble.

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Troubleshooting

6.2.5 Light Image

• Description The printed image is light, with no ghost.

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Check and Cause

1. Develop roller is stained when the toner of print cartridge is almost consumed.

2. Ambient temperature is below than 10°C.

Solution

1. Check if the Toner Save mode is off.

Check if the density is light.

2. No 1 : Replace the print cartridge and try to print out.

3. No 2 : Wait 30 minutes after printer is powered on before you start printing.

3. Bad contact caused by the toner stains between the high voltage terminal in the

HVPS and the one in the set.

4. Abnormal output from the HVPS.

(Run self-test and check 1~4)

5. Check warranty out.

4. No3 : Clean up the contaminated area by the toner.

5. Replace the HVPS if the problems are not solved by the above four instructions.

6. Replace print cartridge.

6.2.6 Dark Image or a Black Page

• Description The printed image is dark.

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Check and Cause

1. No charge voltage in the engine board.

Solution

1. Check the state of the connector which connects the engine board and HVPS.

2. Charge voltage is not turned on due to the bad contacts between power supply in the side of the print cartridge and charge terminal of HVPS.

2. Clean the high voltage charge terminal.

3. Replace the HVPS if not solved by the above direction 1 and 2.

3. VD0 signal of the Main PBA is Low state. 4. Replace the LSU Unit or Main PBA.

4. Case back side the cleaning blade of print cartridge.

5. Replace print cartridge.

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Troubleshooting

6.2.7 Uneven Density

• Description Print density is uneven between left and right.

Check and Cause

1. The pressure force on the left and right springs of the transfer roller is not even, the springs are damaged, the transfer roller is improperly installed, or the transfer roller bushing or holder is damaged.

2. The life of the print cartridge has expired.

Solution

1. Replace both the left and right Spring

Holder.

2. Occur in the print cartridge gently shake the print cartridge.

3. The toner level is not even on the print cartridge roller due to the bad blade.

3.Replace the print cartridge and try to print out.

6.2.8 Background

• Description Light dark background appears in whole area of the printing.

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Check and Cause

1. Does character exist less than 2% coverage per a page, and hasn’t it been used long time?

(see the configuration sheet)

2. Is a recycled print cartridge be used?

3. Has the life span of the print cartridge ended?

4. Is the movement(Up and Down) of the transfer roller smooth?

5. Is the HVPS normal?

Solution

1. The print cartridge is basically designed to print 20,000 pages with

5% coverage. If it prints more than

23,000 pages with 2% coverage, a background can occur.

2. The A/S is not guaranteed if using a recyled the print cartridger.

3. Replace the print cartridge when the life span of it has been ended.

4. Clean the bushing part of the transfer roller.

5. If the problem is still not solved, replace the print cartridge.

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Troubleshooting

6.2.9 Ghost (1)

• Description Ghost occurs at 95 mm intervals of the OPC drum in the whole printing.

Digital Printer

Check and Cause

1. Bad contacts caused by contamination from toner particles between high voltage terminal in the main body and the electrode of the print cartridge.

2. Bad contacts caused by contamination from toner particles between high voltage terminal in the main body and the one in the HVPS board.

3. The life of print cartridge is expired.

Solution

1. Clean the terminals when contaminated by toner particles.

2. Occur in the print cartridge, replace the print cartridge and try to print out.

3. Replace the engine board if not solved by the above directions 1-2.

4. Transfer roller lifetime(150,000 sheets) has expired.

4. If not solved by the direction 3, check the transfer roller lifetime and replace it.

5. Abnormal low temperature(below 10°C).

6. Damaged cleaning blade in the print cartridge.

5. Wait about 1 hour after power on before using printer.

6. Occur in the print cartridge, replace the print cartridge and try to print out.

6.2.10 Ghost (2)

• Description

Ghost occurs at 95 mm intervals of the OPC drum in the whole printing.

(When printing on card stock or transparencies using manual feeder)

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Check and Cause

When printing on card stock thicker than normal paper or transparencies such as OHP, higher transfer voltage is required.

Solution

Select Card stoc or OHP Film on paper type menu from the software application and after using returning to the original mode is recommended.

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Troubleshooting

6.2.11 Ghost (3) : Fuser

• Description Ghost occurs at 126 mm intervals.

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Check and Cause

The temperature of the fuser is maintained high.

Solution

1. Disassemble the fuser and remove the contaminated toner particles on the roller and clean the foreign matter between

Thermistor and Heat roller.

(Caution: can be deformed)

6.2.12 Stains on the Face of Page

• Description The background on the face of the printed page is stained.

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Check and Cause

1. Toner leakage due to improperly sealed print cartridge.

2. If the transfer roller is contaminated, stains on the face of page will occur.

Solution

1. Replace the print cartridge, and clean to the toner powder of machine.

2. If the transfer roller is contaminated, run

OPC Cleaning Mode Print 2 or 3 times.

And perform Self-Test 2 or 3 times to remove contamination.

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Troubleshooting

6.2.13 Stains on the Back of Page

• Description The back of the page is stained at 55 or 126 mm intervals.

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Check and Cause

1. 55mm : Transfer roller is contaminated.

2. 126mm : Pressure roller is contaminated.

Solution

1.1. Perform the OPC Cleaning Mode Print 2 or 3 times. Run Self-Test to remove the contamination of the transfer roller.

1.2. Replace the transfer roller if contaminated severely.

2.1. Perform the fuser cleaning mode print 2 or

3 tiones.

2.2. Disassemble the fuser and clean the

H/R(Heat Roller) and P/R(Pressure roller).

And check the area between H/R and

Thermistor. If contaminated, clean the area not to be deformed.

6.2.14 Blank Page Print out (1)

• Description Blank page is printed.

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Check and Cause

Bad ground contacts in OPC and/or print cartridge.

Solution

1. Check if the Ground-OPC is defective(set inside left side).

2. Remove contamination of the terminals of the print cartridge and the unit.

6.2.15 Blank Page Print out (2)

• Description

1. Blank page is printed.

2. One or several blank pages are printed.

3. When the printer turns on, several blank pages print.

Check and Cause

1. Bad ground contacts in OPC and/or print cartridge.

2. Abnormal solenoid.

Solution

1. Remove contamination of the terminals of the print cartridge.

2. Perform the engine self test using EDC Mode to check if the Solenoid is normal.

3. If not solved by the above directions 1-2,

Replace the engine board.

4. Turn the power off, delete the data of PC and try printing again.

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6.3 The cause and solution of the bad discharge

6.3.1 Wrong Print Position

• Description Printing begins at wrong position on the paper.

Check and Cause

Wrong sense time caused by defective feed sensor actuator.

Solution

Replace the defective actuator

Troubleshooting

6.3.2 JAM 0

• Description

1. Paper is not exited from the cassette.

2. Jam-0 occurs if the paper feeds into the printer.

Check and Cause

1. Check the Main clutch by using EDC

Mode.

Solution

1. Replace the Main clutch.

2. Check if the pad is loose due to bad sealing of the side-pad.

2. Replace the side-pad Assembly L or

R, if necessary.

3. Check the surface of the roller-pickup for foreign matter.

3. Clean with soft cloth dampened with

IPA(Isopropyl Alcohol) or water.

4. If continuous clusters occur, check whether the assembly slot between shaft-pickup and housing-pickup opens or is broken away.

5. If the paper feeds into the printer and

Jam 0 occurs, perform EDC Mode to check feed-sensor of the engine board.

4. Replace the Main PBA and/or Sensor.

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Troubleshooting

6.3.3 JAM 1

• Description

1. Recording paper is jammed in front of or inside the fuser.

2. Recording paper is stuck in the discharge roller and in the fuser just after passing through the

Actuator-Feed.

Check and Cause

1. If the recording paper is jammed in front of or inside the fuser.

Solution

1. Replace the SMPS or Exit-Sensor.

2. If the recording paper is stuck in the discharge roller and the fuser just after passing through the Actuator-

Feed, Feed Actuator may be defective.

2. Replace the Main PBA.

3. Reassemble the Actuator-Feed and

Spring-Actuator if the movement is bad.

6.3.4 JAM 2

• Description

1. Recording paper is jammed in front of or inside the fuser.

2. Recording paper is stuck in the discharge roller and in the fuser just after passing through the

Actuator-Feed.

Check and Cause

1. If the paper is completely fed out of the printer, but Jam 2 occurs : Exit sensor is defective.

• After the paper is completely discharged, actuator Exit should return to the original position to shut the photo-sensor. Sometimes it takes longer hour than it should and does not return.

2. If the paper is rolled in the Fuser Roller:

• This occurs when a Guide claw is broken away or transformed.

• It occurs when the Spring of a Guide claw is broken away or transformed.

• It occurs when the Heat-Roller or

Pressure-Roller is seriously contaminated with the toner.

3. Paper is accordion in the fuser.

Solution

1. Check if the exit sensor actuator is defective.

• Check if the actuator exit is deformed

(Check if the lever part is deformed in shape).

• Check whether burrs occur in the assembly part of the actuator exit or not and if the actuator is smoothly operated.

• Check if foreign matter and wire get caught in the actuator exit's operation.

2. If the paper is stuck in the fuser : disassemble the fuser and remove the jammed paper, and clean the surface of the pressure roller with dry gauze.

3. Remove the jammed paper after disassembling the fuser : Clean the surface of the pressure roller with dry gauze.

• Remove the toner particles stained on the rib.

• Check the assemblage and performance of the exit.

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Troubleshooting

6.3.5 Duplex Jam 1

• Description A message 'Duplex Jam 1' is displayed in a LCD window.

Check and Cause

1. It is a case when a paper cannot operate a duplex sensor.

2. It is a case when a paper cannot reach to a duplex sensor due to a paper jam on a duplex path.

Solution

1. Replace a SMPS or main PBA

2. A case that a paper jam occurs on

(A) after it is reversed: replace a

2nd exit roller after checking its operation.

3. A case that a paper jam occurs on

(B) after it is reversed: replace a duplex roller after checking its operation

6.3.6 Duplex Jam 0

• Description A message 'Duplex Jam 2' is displayed in a LCD window.

Check and Cause

1. It is a case that a paper cannot pass a duplex sensor.

2. It is a case that a paper cannot reach to a registration sensor after it is passed a duplex sensor.

Solution

1. Replace a SMPS or main PBA.

2. A case that a leading edge of a paper is jammed on (A) check an operation of a guide front. If it is worn or defective, replace it.

3. Check an operation of a feed roller and a registration roller. If they are worn or defective replace them.

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Troubleshooting

6.3.7 Multi-Feeding

• Description Multiple sheets of paper are fed at once.

Check and Cause

1. Check the Guide side L/R or Guide Rear in the

Cassette, if the position is correct.

2. Solenoid malfunction(the solenoid does not work properly): Perform EDC Mode.

3. Pad-Friction is contaminated with foreign matter.(oil...)

Solution

1. Replace the solenoid if necessary.

2. Replace the Main PBA.

3. Clean the pad friction with soft cloth dampened with

IPA(Isopropyl Alcohol).

4. Use the smooth paper.

4. The face of paper is blended.

6.3.8 Paper rolled in the fuser

• Description If contaminated at intervals of 57mm on the back of a paper.

Check and Cause

1. Contamination of the pressure roller or heat roller (Background, Hot off set).

2. Check the claw of the fuser whether it is deformed.

Solution

1. After disassembling the fuser, clean contamination between the heat roller and the thermostor and remove the contamination of the pressure roller.

2. If there is heavy background, repair it by the background troubleshooting method.

3. Clean the surface of the heat roller with IPA or water

4. Check the warp or separation of the print claw and the holder plate claw, and then manage it.

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Troubleshooting

6.3.9 Paper rolled on the OPC Drum

• Description Paper is rolled up in the OPC.

Check and Cause

1. Paper is too much thin.

2. The face of paper is curled.

Solution

1. Recommend to use normal paper.

2. How to remove the rolled paper in the OPC.

• Remove the paper while turning the OPC against the ongoing direction.

• Clean fingerprints on the OPC softly with soft cloth dampened with tissue.

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Troubleshooting

6.4 The cause and solution of the malfunction

6.4.1 Fuser Error

• Description

A message “Engine Fuser Low Heat Error/Engine Fuser Over Heat Error” is displayed in a LCD panel.

Check and Cause

1. Check whether a thermostat, open or not.

2. Check whether a thermistor is open or not.

Solution

1. Replace the fuser if a thermostat is open.

3. Heat lamp ON/OFF test

4. It could not operate due to a gear of a fuser is melted.

2. Replace the fuser if a thermistor sensor is located deep inside of a sponge.

3. Check whether the overheat mode circuit operates normally or not.

4. Replace the fuser.

6.4.2 LSU Error

• Description A message “Engine Hsyne Error” is displayed in a LCD panel.

Check and Cause

1. Check whether the LSU connector is disconnected or not.

2. Check whether the LSU motor is rotating or not.

3. Check the HSYNC signal.

Solution

1. Connect the LSU harness properly.

2. Replace a LSU.

3. Replace a main board if the same error occurs again after replacing a LSU.

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6.4.3 Not function of the gear of the fuser due to melting away

• Description

The motor breaks away from its place due to gear melting away.

Check and Cause

1. Check the Fuser Unit.

1. Replace the Fuser.

Solution

2. Replace the Main PBA.

2. Replace the SMPS.

Troubleshooting

6.4.4 Paper Empty

• Description The paper lamp on the operator panel is on even when paper is loaded in the cassette.

Check and Cause

1. Bending or deformation of the actuator of the paper sensor.

2. The function of the engine board is defective

3. Check the connector and harness.

Solution

1. Replace the defective actuator.

2. Replace the empty sensor PBA.

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Troubleshooting

6.4.5 Paper Empty without indication

• Description

A message “Paper Empty” is displayed in a LCD panel.

The paper lamp on the operator panel does not come on when the paper cassette is empty.

Check and Cause

1. Bending or deformation of the actuator of the paper sensor.

2. Check the Main board.

3. Check the empty sensor board.

4. Check the toner sensor board.

Solution

1. Replace the defective actuator.

2. Replace the board which has a trouble.

6.4.6 Cover Open

• Description

A message “Colse Top Cover” is displayed in a LCD panel.

The ERROR lamp is on even when the print cover is closed.

Check and Cause

1. The hook lever in the top cover may be defective.

Solution

1. Replace the hook lever, if defective.

2. Check the main board

3. Check the cover open board.

4. Check the harness and connection.

2. Check the insertion of the cover open S/W connect.

3. Replace the main board or cover open board.

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Troubleshooting

6.4.7 No error message when the cover is open

• Description

The ERROR message does not come on even when the printer cover is open

Check and Cause

1. Check the cover open circuit on the main board.

2. Check the cover open board.

Solution

1. Check the insertion of the cover open S/W connect.

2. Replace the main control board or cover open board.

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Troubleshooting

6.4.8 Defective motor operation

• Description

Main motor is not driving when printing, and paper does not feed into the printer, resulting 'Jam 0'.

Check and Cause

1. The motor harness or motor PCB may be defective.

2. Check the motor operation in the EDC mode.

Solution

1. Replace the motor unit.

2. Replace the main PBA.

6.4.9 No Power

• Description When system power is turned on, all lamps on the operator panel do not come on.

Check and Cause

1. Check if the power input and SMPS output are normal.

1. Replace the SMPS.

Solution

2. Check the inferiority of LED-Panel or LDC window on the front-cover if the OP panel does not appear after normal warming-up.

2. Replace the control board.

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6.4.10 Vertical Line Getting Curved

• Description

When printing, vertical line gets curved.

Check and Cause

1. If the supply of +24v is unstable in the main control board linking with LSU, check drive by EDC mode: LSU check.

1. Replace LSU.

2. Chect the deve PBA in the print cartridge.

Solution

2. Replace the toner sensor PBA.

2. Replace the main PBA.

Troubleshooting

Samsung Electronics

Service Manual

6-19

Troubleshooting

6.5 Maintaining the toner cartridge

Toner cartridge storage

To get the most from the toner cartridge, keep the following guidelines in mind:

• Do not remove the toner cartridge from its package until ready for use.

• Do not refill the toner cartridge. The printer warranty does not cover damage caused by using a refilled cartridge.

• Store toner cartridge in the same environment as the printer.

• To prevent damage to the toner cartridge, do not expose it to light for more than a few minute.

Expected cartridge life

The life of the toner cartridge depends on the amount of toner that print jobs require. When printing text at ISO 19752

5% coverage, a new toner cartridge lasts an average of either 20,000 or 10,000 pages. (The original toner cartridge supplied with the printer lasts an average of 10,000 pages.) The actual number may also be different depending on the print density of the pages you print on, and the number of pages may be affected by operating environment, printing interval, media type, and media size. If you print a lot of graphics, you may need to change the cartridge more often.

Saving toner

To save toner, press Toner Save on the control panel. The button backlight turns on.

Using this feature extends the life of the toner cartridge and reduce your cost per page, but it also reduces print quality.

6.5.1 Checking the remaining toner

You can check the level of toner left in the cartridge.

If you are having print quality problems, this can help you determine if the problem is caused by low toner.

Following the key formation at the panel, note the toner remaining level on the cartridge information after taking out the configuration sheet. In other way to check, follow the TECH mode and out put the cartridge information.

The display shows the percentage of the remaining toner.

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Troubleshooting

6.5.2 Redistributing toner cartridge

When the toner cartridge is near the end of its life:

• White streaks and light printing occur.

• Toner Low appears on the display.

• The Smart Panel program window appears on the computer telling you that the toner level is low.

• The Status LED blinks red. If this happens, you can temporarily reestablish print quality by redistributing the remaining toner in the cartridge. In some cases, white streaks or light printing will still occur even after you have redistributed the toner.

1. Open the top cover.

2. Pull the toner cartridge out.

4. Hold the toner cartridge by the handle and slowly insert the cartridge into the opening in the printer.

Tabs on the sides of the cartridge and corresponding grooves within the printer will guide the cartridge into the correct position until it locks into place completely.

Caution : • Avoid reaching too far into the printer. The fusing area may be hot.

• To prevent damage to the toner cartridge, do not expose it to light for more than a few minutes. Cover it with a piece of paper, if necessary.

• Do not touch the green surface underside of the toner cartridge. Use the handle on the cartridge to avoid touching this area.

3. Thoroughly shake the cartridge 5 or 6 times to distribute the toner evenly inside the cartridge.

5. Close the top cover. Make sure that the cover is securely closed.

Note : If toner gets on your clothing, wipe it off with a dry cloth and wash clothing in cold water. Hot water sets toner into fabric.

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Troubleshooting

6.5.3 Replacing the toner cartridge

When the toner cartridge is completely empty:

• Replace Toner appears on the display.

• The Smart Panel program window appears on the computer telling you that the toner cartridge is empty.

• The Status LED lights red.

At this stage, the toner cartridge needs to be replaced. For order information for toner cartridges,

Note : This feature does not work for the Toner Empty message.

1. Open the top cover.

2. Pull the toner cartridge out.

4. Locate the sealing tape at the end of the toner cartridge. Carefully pull the tape completely out of the cartridge and discard it.

3. Remove the new toner cartridge from its bag.

Note : • The sealing tape should be longer than 60 cm when correctly removed.

• Holding the toner cartridge, pull the sealing tape straight to remove it form the cartridge. Be careful not to cut the tape. If this happens, you cannot use the toner cartridge.

• Refer to the helpful pictures on the cartridge wrapping paper.

5. Remove the flexible plastic holder out of the toner cartridge.

Caution : Do not use sharp objects, such as a knife or scissors, to open the toner cartridge package.

They might scratch the drum of the cartridge.

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Troubleshooting

6. Thoroughly shake the cartridge 5 or 6 times to distribute the toner evenly inside the cartridge.

Thoroughly roll the cartridge to assure maximum copies per cartridge. Save the box and the plastic bag for shipping.

Caution : • If toner gets on your clothing, wipe it off with a dry cloth and wash clothing in cold water.

Hot water sets toner into fabric.

• To prevent damage to the toner cartridge, do not expose it to light for more than a few minutes. Cover it with a piece of paper, if necessary.

• Do not touch the green surface underside of the toner cartridge. Use the handle on the cartridge to avoid touching this area.

7. Hold the toner cartridge by the handle and slowly insert the cartridge into the opening in the printer.

Tabs on the sides of the cartridge and corresponding grooves within the printer will guide the cartridge into the correct position until it locks into place completely.

8. Close the top cover. Make sure that the cover is securely closed.

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Troubleshooting

6.5.4 Toner Cartridge-related messages

Message Meaning

Install Toner A toner cartridge is not installed.

Invalid Toner

Toner Low

NonGenuine Toner

Stop

Install a toner cartridge.

Install a Samsung -genuine toner cartridge ,designed for your printer.

The toner cartridge you have installed is not for your printer.

The toner cartridge is almost empty.

Take out the toner cartridge and thoroughly shake it.By doing this,you can temporarily reestablish printing operations.

The toner cartridge installed is not a genuine cartridge.

You can select either Stop or Continue.If you do not select any,the printer will work as Stop is selected.

If you select Stop, you cannot print until the genuine cartridge is installed.However, you can still print any kind of reports.

If you select Continue, you can keep printing but the quality cannot be guaranteed, and the product support is no longer provided.

If you want to change the selection, turn the printer off and on to have this message appear again, and then re-select Stop or Continue.

NonGenuine Toner

Replace Toner1

NonGenuine Toner

Replace Toner

Toner Low

Replace Toner

Replace Toner

Toner Exhausted

Stop

Toner Exhausted

Replace Toner1

Toner Exhausted

Replace Toner

The toner cartridge installed is not a genuine cartridge.

The toner cartridge installed is not a genuine cartridge.

This message appears when you selected Stop at the NonGenuine

Toner prompt.

Install the genuine toner cartridge.

This message appears when you selected Continue at the NonGenuine

Toner prompt.

Install the genuine toner cartridge.

The toner in the cartridge has run out. Install a new genuine toner cartridge.

You can keep printing but the quality cannot be guaranteed, and the product support is no longer provided.

You can configure not to see the Toner Low Replace Toner message.

The toner cartridge installed is not a genuine cartridge.

This message appears when you turned off the Toner Low Replace

Toner message.

Install a new genuine toner cartridge.

You can keep printing but the quality cannot be guaranteed, and the product support is no longer provided.

The lifespan of the toner cartridge is reached.

You can select either Stop or Continue. If you do not select any, the printer will work as Stop is selected.

If you select Stop, you cannot print until the genuine cartridge is installed.

If you select Continue, you can keep printing but the quality cannot be guaranteed, and the product support is no longer provided.

If you want to change the selection, turn the printer off and on to have this message appear again, and then re-select Stop or Continue.

The lifespan of the toner cartridge is reached.

The lifespan of the toner cartridge is reached.

This message appears when you selected Stop at the Toner Exhausted prompt.

Install the genuine toner cartridge.

This message appears when you selected Continue at the Toner

Exhausted prompt.

Install the genuine toner cartridge.

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Troubleshooting

6.6 The cause and solutions of bad environment of the software

6.6.1 The printer is not working (1)

• Description

While Power turned on, the printer is not working in the printing mode.

Check and Cause

1. Run Self-Test Mode: Turn the power on while pressing the test printing button for 2 or 3 seconds before printing works.

Solution

1.Check the power of the printer and perform the Self-

Test. If the test printing works, that means no problems in the printer itself. If the test printing does not work, that means bad functioning of the printer(not because of software).

2. Check if the PC and the printer is properly connected and the print cartridge installed.

3. Printing is nor working in the Windows.

2. Replace the printer cable. If the problems not solved even after the cable replaced, check the amount of the remaining tone.

(refer to print cartridge Service 4-5)

3. Check if the connection between PC and printer port is proper. If you use windows, check if the printer driver in the controller is set up. If the printer driver is properly set up, check in which program the printing is not working. The best way to find out is to open the memo pad to check the function of printing. If it is not working in a certain program, adjust the setup the program requires. Sometimes, the printout is normal within the Windows basic programs, but it's not working in a particular program. In such case, install the new driver again. If not working in the Windows basic program, Check the setup of the port of CMOS is on

ECP. And check the address of IRQ 7 and 378

4. Check if the printer cable is directly connected to peripheral devices

4. If the scanner needs to be connected to the printer, first the remove the scanner from the PC to see if the printer is properly working alone.

Service Manual

6-25

Samsung Electronics

Troubleshooting

6.6.2 The printer is not working (2)

• Description

After receiving the printing order, no response at all or the low speed of printing occurs due to wrong setup of the environment rather than malfunction of the printer itself.

Check and Cause

1. Secure more space of the hard disk.

2. Printing error occurs even if there is enough space in the hard disk.

Solution

1. Not working with the message 'insufficient printer memory' means hard disk space problem rather than the RAM problem. In this case, provide more space for the hard disk. Secure more space using the disk utilities program.

2. The connection of the cable and printer port is not proper. Check if the connection is properly done and if the parallel port in CMOS is rightly set up.

3. Check the parallel-port-related items in the CMOS

Setup.

4. Reboot the system to print.

3. As a printer port, Select ECP or SPP among

SPP(Normal), ECP, and EPP modes(increase printing speed) SPP normal mode support 8-bit data transfer, while ECP Mode transfer the 12-bit data.

4. If the regular font is not printing, the cable or the printer driver may be defective.

Turn the PC and printer off, and reboot the system to print again. If not solved, double-click the printer in my computer If the regular fonts are not printed this time again. the cable must be defective so replace the cable with new one.

6-26

Service Manual

Samsung Electronics

Troubleshooting

6.6.3 Abnormal Printing

• Description

The printing is not working properly even when the cable has no problem.

(even after the cable is replaced)

If the printer won't work at all or the strange fonts are repeated, the printer driver may be defective or wrong setup in the CMOS Setup.

Check and Cause

1. Set up the parallel port in the CMOS SETUP.

Solution

1. Select SPP(Normal) or ECP LPT Port the among

ECP, EPP or SPP in the CMOS Setup.

2. Printer Driver Error.

2. Check the printer in My Computer.(to see if the printer driver is compatible to the present driver or delete the old driver, if defective and reinstall the new driver)

3. Error message from insufficient memory.

(The printing job sometimes stops or due to insufficient virtual memory, but it actually comes from the insufficient space of the hard disk.)

3. Delete the unnecessary files to secure enough space of the hard disk and start printing job again.

Samsung Electronics

Service Manual

6-27

Troubleshooting

6.6.4 SPOOL Error

• Description

To spool which stands for "simultaneous peripheral operations online" a computer document or task list (or "job") is to read it in and store it, usually on a hard disk or larger storage medium so that it can be printed or otherwise processed at a more convenient time (for example, when a printer is finished printing its current document).

Check and Cause

1. Insufficient space of the hard disk in the directory assigned for the basic spool.

Solution

1. Delete the unnecessary files to provide more space to start printing job.

2. If the previous printing error not solved.

3. When expected to collide with other program.

2. If there are some files with the extension name of

****.jnl, Delete them and Reboot the Windows to restart printing job.

3. Shut down all other programs except the current one, if possible.

4. Delete the printer driver completely and reinstall it.

4. When an application program or the printer driver is damaged.

5. When some files related to OS are damaged or virus infected.

5 After rebooting the computer, check for viruses, restore the damaged files and reinstall the program to do the printing job.

6. Memory is less than suggested one.

6. Add up enough memory to the PC.

How to delete the data in the spool manager.

In the spool manager, the installed drivers and the list of the documents waiting to be printed are shown.

Select the document to be deleted and check the delete menu.

If you intend to delete the current document being printed, the data being transferred to the printer will be put out and then the document is removed. Before choosing the document, the menu is still inactive.

Or put the document out of the list and repeat the routine as in the above or finish the spool manager.

6-28

Service Manual

Samsung Electronics

Exploded Views & Parts List

7. Exploded Views and Parts List (ML-4550 Series)

Contents

7.1

Main Assembly

7.2

Cover Assembly

7.3

Frame Assembly

7.4

Fuser Unit

7.5

REGI Assembly

7.6

Main Motor Assembly

7.7

Deve Motor Assembly

7.8

Exit Sorenoid Assembly

7.9

Cassette Assembly

7.10

Duplex Unit

7.11

SCF Unit

DIGITAL LASER PRINT CONTENTS

[The keynote of Product]

- Series Model: ML-4550 / 4551N / 4551ND

- High speed Laser Printer:

Up to 43 ppm in A4 (45 ppm in Letter),

Duplex: 29 ipm (A4); 30 ipm (Letter)

- Resolution: Up to 1200 x 1200 dpi

- Marvell 500Mhz

- Memory: 128 MB (Max. 512 MB)

128, or 256 MB optional memory available.

Use only the Samsung-approved DIMM.

128 MB: ML-MEM150, 256 MB: ML-MEM160

- Option:

ML-4550:500-sheet trays, ethernet 10/100 Base

TX wired LAN, ethernet 10/100 Base hard disk, duplex unit, DIMM

- Toner cartridge:

Starter: 10K or 20K pages

Consumable: 10K or 20K pages

- Duty cycle: Monthly Up to 150,000 pages

Service Manual 7-1

Samsung Electronics

Exploded Views & Parts List

7.1 Main Assembly

35

0

2

37

12

14

11

10

8

8-1

8-2

8-3

8-4

13

24

32

31

7

15

34

1

29

28

25

26

9-1

9-2

9-3

9

22

21

16

17

19

3

3-4

3-3

3-5

3-2

3-1

3-6

36

39 (Network only)

39-2

18

20-1

20-3

21-3

20-2

22

21-2

21-1

23

20

5

4-1

39-1

4-2

6

4

30

SCF

30

7-2

Service Manual

Samsung Electronics

Service Parts List(ML-4551N/ND/NDR)

Drawer#

7.1-19-1

7.1-19-2

7.1-20

7.1-20-1

7.1-20-2

7.1-20-3

7.1-21

7.1-21-1

7.1-21-2

7.1-21-3

7.1-22

7.1-23

7.1-24

7.1-25

7.1-26

7.1-27

7.1-28

7.1-29

7.1-12

7.1-13

7.1-14

7.1-15

7.1-16

7.1-17

7.1-18

7.1-19

7.1-8-3

7.1-8-4

7.1-9

7.1-9-1

7.1-9-2

7.1-9-3

7.1-10

7.1-11

7.1-3-5

7.1-3-6

7.1-4

7.1-4

7.1-4-1

7.1-4-1

7.1-4-2

7.1-4-2

7.1-5

7.1-6

7.1-5

7.1-6

7.1-7

7.1-8

7.1-8-1

7.1-8-2

7.1-0

7.1-0

7.1-0

7.1-1

7.1-1

7.1-2

7.1-2

7.1-2

7.1-2

7.1-3

7.1-3

7.1-3-1

7.1-3-1

7.1-3-2

7.1-3-3

7.1-3-4

SEC_Code Description

ML-4550

ML-4551N

MONO LASER,43PPM/A4

MONO LASER,43PPM/A4,NETWORK

ML-4551ND MONO LASER,43PPM/A4,NETWORK,DUPLEX

JC96-04004A ELA UNIT-FRAME BASE

JC96-04004B ELA UNIT-FRAME BASE

JC96-04064A ELA HOU BASE-HOUSING

JC96-04064B ELA HOU BASE-HOUSING

JC96-04064E ELA HOU BASE-HOUSING

JC96-04064C ELA HOU BASE-HOUSING

JC97-02230B MEA UNIT-KNOCK_UP MP

JC97-02230D MEA UNIT-KNOCK_UP MP

JC61-01251B PLATE-M_KNOCK UP MP

JC61-01251C PLATE-M_KNOCKUP MP

JC74-00011A MPR-PAD KNOCK UP MP

JC72-01006B PMO-SIDE GUIDE MP(R)

JC72-01005B PMO-SIDE GUIDE MP(L)

JG66-40003A GEAR-PINION

JC66-00895A SHAFT-REINFORCEMENT

JC97-02231A MEA UNIT-COVER MP_SEC

JC97-02231D MEA UNIT-COVER MP

JC63-00695A COVER-M-MP_SEC

JC63-00695D COVER-M_MP

JC63-00691B TRAY-M_EXTEND_MP

JC63-00691C TRAY-M_EXTEND_MP

JC63-00694B TRAY-M_LINK MP(L)

JC63-00689B TRAY-M_LINK MP(R)

JC63-00694C TRAY-M_LINK MP(L)

JC63-00689C TRAY-M_LINK MP(R)

JC66-00540B ROLLER-TRANSFER

JC96-01729A ELA UNIT-HOLDER TR R

JC72-41142A PMO-BUSHING TR

JC61-00046A SPRING ETC-TR R HAWK

JC72-41145C PMO-TRANSFER HOLDER R

JC70-11053A IPR-PLATE TR

JC96-01730B ELA UNIT-HOLDER_TR_L

JC72-41142A PMO-BUSHING TR

JC61-00046A SPRING ETC-TR R HAWK

JC72-41145F PMO-TRANSFER HOLDER L

JC72-41292B PMO-CAP TR

JC66-00039A GEAR-TR29

JC96-03959A ELA UNIT-REGI

JC66-00420A GEAR-REGI Z25

JC67-00039A CAP-M-GEAR

JC96-04066A ELA UNIT-LSU

JC96-03426A ELA UNIT-EXIT SOL

JC96-03408A ELA UNIT-DEVE MOTOR

JC96-04063A ELA UNIT-MAIN

JC96-04109A ELA HOU-MAIN

JC92-01823A PBA MAIN-CONTROLLER

JC92-01824A PBA MAIN-DIMM

JC97-02226A MEA UNIT-GEAR PICK UP

JC66-00870A GEAR-M-PICK UP CAM

JC66-00876A GEAR-M-PICK UP

JC61-00003A SPRING ETC--CAM MP

JC97-01738A MEA UNIT-GEAR P/UP MP CARDINA

JC66-00424A GEAR-MP HOLDER_CAM

JC66-00423A GEAR-MP PICK_UP

JC61-00003A SPRING ETC--CAM MP

JC66-10202A BEARING-PICK UP

JC61-00755A BRACKET-P-SHAFT MP

JC61-01735A HOLDER-FAN

JC33-00012A SOLENOID-MAIN

JC33-00016A SOLENOID-MP

JC96-04121A ELA UNIT-DEVE_ERASER

JC63-01133A SHIELD-SMPS

JC96-04003B ELA HOU-SMPS_HVPS_V2

Samsung Electronics

Service(SA:service available, SNA:service not available)

Location Service

SA

SA

SA

SA

SA

SA

SA

SA

SNA

SA

SA

SA

SA

SNA

SNA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SNA

SNA

SNA

SA

SNA

SNA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SNA

SNA

SA

SNA

SA

SA

SNA

SNA

SA

SA

SNA

SA

SA

SA

SA

SA

SA

SA

-

-

-

SA

SA

SNA

SNA

SNA

Remark

110V

220V

ML-4551N

ML-4551ND

ML-4551NDR

ML-4550R,4551NR

ML-4551NDR

ML-4551NDR

ML-4551NDR

ML-4551NDR

ML-4551NDR

ML-4551NDR

ML-4551NDR

220V

Z4415

S0020

G0467

H4008

P2055

S0020

B0003

S4013

Z4416

S8015

S8016

Z4417

Z4418

Z4419

K3059

K3057

Z4410

Z4411

Z4412

Z4413

G0468

Z4414

Z4404

Z4407

Z0015

G0439

Z4408

G0415

C1013

Z4409

Z4402

K3139

Z4403

Z4404

Z4405

Z4406

Z6106

Z4403

Z4401

Z4401

K4281

K4281

K4282

K4283

K4282

K4283

Z4398

Z4399

Z4399

Z4399

Z4399

G0470

G0470

W3027

W3027

O1109

G2301

G2299

O1127

Z4400

E4062

E4062

͢

1

1

͢

1

1

QT'Y

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

Service Manual 7-3

Exploded Views & Parts List

Drawer#

7.1-29

7.1-30

7.1-31

7.1-32

7.1-33

7.1-34

7.1-35

7.1-35

7.1-36

7.1-37

7.1-37

7.1-38

7.1-39

7.1-39-1

7.1-39-2

Replacement

Replacement

SEC_Code Description

JC96-04003A ELA HOU-SMPS_HVPS_V1

JC71-00042A BAR-P_CROSS BOTTOM

JC31-00050A FAN

JC61-00667A STOPPER-M-FAN80

JC61-01760A

͹΀ͽ͵Ͷ΃͞Ͷ΃Ͳ΄Ͷ΃

JC96-03963A ELA UNIT-DEVE

JC96-04015A ELA UNIT-CASSETTE

JC96-04015B ELA UNIT-CASSETTE

JC92-01839A PBA-ERASE_LAMP

JC96-03412C ELA UNIT-DUPLEX

JC96-03412E ELA UNIT-DUPLEX

JC31-00050A ͷͲͿ

JC96-03586A ELA HOU-EMBEDDED_MAC

JC92-01700B PBA SUB-NPC_PRT

JC61-00809A BRACKET-_M_NPC

-

CBF-POWER CORD

BOX-MAIN

Service(SA:service available, SNA:service not available)

Location

Z4419

K2861

Z4425

F5029

Z4421

Z4422

Z4423

Z4423

Z4424

Z6089

Z6089

Z4425

Z4426

Z4427

B0005

QT'Y

1

1

1

2

1

1

1

1

͢

1

1

͢

1

1

1

Service

SA

SA

SA

SA

SNA

SA

SNA

SA

SA

SA

SA

SA

SA

SA

SNA

SA

SA

Remark

110V

ML-4551NDR

ML-4551NDR

7-4

Service Manual

Samsung Electronics

7.2 Cover Assembly

2

0

5

1

1-13

1-10

1-12

1-9

1-11

6-1

1-1

1-15

1-18

6-10

1-2

1-6

1-17

1-5

1-7

1-3

1-4

1-8

1-16

1-14

6-2

6-3

6

7 (N/A : ML-4551ND)

7-1

7-2

3

3-2

6-9

6-4

6-6

6-7

6-9

6-8

6-5

4

3-1

3-3

Service Manual

75

Samsung Electronics

Exploded Views & Parts List

Drawer#

7.2-6-4

7.2-6-5

7.2-6-6

7.2-6-7

7.2-6-8

7.2-6-9

7.2-7

7.2-7

7.2-7-1

7.2-7-2

7.2-7

7.2-7-2

7.2-8

7.2-8

7.2-1-14

7.2-2

7.2-2

7.2-3

7.2-3

7.2-4

7.2-4

7.2-5

7.2-5

7.2-6

7.2-6

7.2-6-1

7.2-6-1

7.2-6-2

7.2-6-2

7.2-6-3

7.2-1-3

7.2-1-4

7.2-1-4

7.2-1-5

7.2-1-6

7.2-1-6

7.2-1-6

7.2-1-6

7.2-1-7

7.2-1-8

7.2-1-9

7.2-1-10

7.2-1-10

7.2-1-11

7.2-1-12

7.2-1-13

7.2-0

7.2-0

7.2-0

7.2-0

7.2-1

7.2-1

7.2-1

7.2-1

7.2-1

7.2-1

7.2-1-1

7.2-1-1

7.2-1-1

7.2-1-2

7.2-1-2

7.2-1-3

SEC_Code Description

JC96-04064A ELA HOU BASE-HOUSING

JC96-04064B ELA HOU BASE-HOUSING

JC96-04064E ELA HOU BASE-HOUSING

JC96-04064C ELA HOU BASE-HOUSING

JC96-03978A ELA UNIT-COVER TOP

JC96-03978B ELA UNIT-COVER TOP

JC96-03978C ELA UNIT-COVER TOP

JC96-03978W ELA UNIT-COVER TOP

JC96-03978U ELA UNIT-COVER TOP

JC96-03978Q ELA UNIT-COVER TOP

JC63-00699B COVER-M_TOP

JC63-00699B COVER-M_TOP

JC63-00699C COVER-TOP

JC63-01101A COVER-M_OPEN

JC63-01101B COVER-M_OPEN

JC72-01367B PMO-STACKER_RX

JC72-01367C PMO-STACKER_RX

JC66-00902B LEVER-M_STACKING 38

JC66-00902C LEVER-STACKING

JC61-00656A STOPPER-M-HINGE OPEN

JC63-01100C COVER-OP PANEL

JC63-01445C COVER-OP PANEL

JC63-01445A COVER-OP PANEL

JC63-01100W COVER-OP PANEL

JC67-00147A LENS LED-M_STATUS

JC75-00095A MEC-BRUSH ANTISTATIC

JC92-01825B PBA SUB-PANEL

JC64-00265A KEY-M_BUTTON

JC64-00265B KEY-M_BUTTON

JC64-00236A KEY-M_STOP

JC64-00047A KEY-M-SAVE MODE

JC64-00194A WINDOW-M-LCD

JC63-00836A GROUND-P-TOP_COVER

JC63-00684B COVER-M_LEFT

JC63-00684C COVER-M_LEFT

JC63-00701B COVER-M_RIGHT

JC63-00701C COVER-M_RIGHT

JC63-00702B COVER-M_CONTROL BOX

JC63-00702C COVER-M_CONTROL BOX

JC63-00685B COVER-M_FRONT INNER

JC63-00685C COVER-M_FRONT INNER

JC97-02232B MEA UNIT-COVER REAR

JC97-02232C MEA UNIT-COVER REAR

JC63-00703B COVER-M_REAR

JC63-00703C COVER-M_REAR

JC72-01357A PMO-STACKER REAR

JC72-01357B PMO-STACKER REAR

JC70-00007A ICT-BRKT REAR COVER

JC61-01217A GUIDE-M_EXIT

JC72-01359A PMO-STRIPE

JC70-20901A IEX-SHAFT IDLE,F/UP

JC72-20902A PEX-ROLLER F/UP(2)

JC61-01774A SPRING ETC-SEPERATION

JC68-01526A LABEL(P)-JAM REMOVAL

JC97-02389B MEA UNIT-COVER DUMMY

JC97-02389C MEA UNIT-COVER DUMMY

JC72-01374A SPONGE-COVER DUMMY

JC63-00697B COVER-M_DUMMY DUP

JC97-02389C MEA UNIT-COVER DUMMY

JC63-00697C COVER-M_DUMMY DUP

JC63-00696B COVER-M_FRAME EXIT

JC63-00696C COVER-M_FRAME EXIT

Service(SA:service available, SNA:service not available)

Location

G0441

L6056

D2149

O1106

Z6115

Z4438

Z4420

Z4420

Z4421

Z4422

Z4420

Z4422

H1290

H1290

H1291

E4063

E4063

H1293

H1293

L6054

L6054

Z4436

G0440

H1292

H1292

H1294

H1294

H1288

H1288

H1291

L6055

L3019

L3019

H3073

Z6100

Z6100

Z6100

Z6100

Z4432

M0022

Z4433

Z4434

Z4434

Z4435

K0049

K4285

Z6090

Z6090

Z4429

Z4429

Z4429

Z4430

Z4430

L6055

Z4399

Z4399

Z4399

Z4399

Z6090

Z6090

Z6090

Z6090

Remark

ML-4550

ML-4551ND

ML-4551NDR

ML-4550R,4551NR

ML-4550

ML-4550

ML-4551ND

ML-4551NDR

ML-4551NR

ML-4550R

ML-4551NDR

ML-4551NDR

ML-4551NDR

ML-4551NDR

ML-4551NDR

ML-4551NR

ML-4550R

ML-4551NDR

ML-4551NDR

ML-4551NDR

ML-4551NDR

ML-4551NDR

ML-4551NDR

ML-4551NDR

ML-4551NDR

ML-4550

ML-4550R

ML-4550

ML-4550

ML-4551NR

ML-4550R,4551NR

ML-4551NDR

QT'Y

1

1

1

1

1

1

1

1

5

1

2

2

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

2

2

1

2

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

Service

SNA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SNA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SNA

SA

SA

SA

SA

SA

SA

SA

SA

SNA

SA

SA

SA

SA

SNA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SNA

SNA

SNA

SA

SA

SA

SNA

SNA

SNA

SNA

SA

SA

SA

SA

7-6

Service Manual

Samsung Electronics

7.3 Frame Assembly(1/2)

Exploded Views & Parts List

Samsung Electronics

Service Manual 7-7

Exploded Views & Parts List

Frame Assembly(2/2)

0

48-2

48-7

48-6

48-5

48-9

48-4

48-8

48-1

48-3

48

99

47

98

88

87

84

85

89

91

92

90

86

81

82

83

100

47-2

47-3

47-4

47-5

93

94

47-1

49

49-5

49-4

49-3

49-2

49-8

49-7

49-7

60-4

60-4

49-9

49-10

49-11

49-13

49-1

49-9

49-10

49-12

96

97

51

95

50

53

58

49

41

50

50-4

50-3

50-6

50-9

50-5

50-1

50-7

50-6

50-2

54

83

79

77

61

63

62

78

66

65

67

70

64

80

76

69

68

73

71

72

59

59-5

59-11

59-5-2

59-5-1

59-7

59-2-1

59-2-2

59-2-3

59-3

59-2

59-4

59-1

59-8

59-6

59-10

59-9

60

52

60-4

60-5

55

56

60-6

60-1

60-6-3

60-2

60-3

60-6-1

60-6-2

57

7-8

Service Manual

Samsung Electronics

Drawer#

7.3-31

7.3-32

7.3-33

7.3-34

7.3-35

7.3-36

7.3-37

7.3-38

7.3-23

7.3-24

7.3-25

7.3-26

7.3-27

7.3-28

7.3-29

7.3-30

7.3-5-4

7.3-6

7.3-8

7.3-9

7.3-12

7.3-13

7.3-14

7.3-14-1

7.3-14-2

7.3-14-3

7.3-15

7.3-16

7.3-17

7.3-19

7.3-20

7.3-21

7.3-39

7.3-40

7.3-43

7.3-47

7.3-47-1

7.3-47-2

7.3-47-3

7.3-47-4

7.3-3-5

7.3-3-6

7.3-3-7

7.3-4

7.3-4-1

7.3-4-2

7.3-4-3

7.3-4-4

7.3-4-5

7.3-4-6

7.3-4-7

7.3-4-8

7.3-5

7.3-5-1

7.3-5-2

7.3-5-3

7.3-0

7.3-0

7.3-1

7.3-2

7.3-2-1

7.3-2-2

7.3-2-3

7.3-2-4

7.3-2-4-1

7.3-2-4-2

7.3-2-4-3

7.3-3

7.3-3-1

7.3-3-2

7.3-3-3

7.3-3-4

SEC_Code Description

JC96-04004A ELA UNIT-FRAME BASE

JC96-04004B ELA UNIT-FRAME BASE

JC61-01206A FRAME-M_BASE

JC97-02649A MEA UNIT-PICK UP MP

JC66-01265A SHAFT-PICK UP MP

JC72-01003A PMO-IDLE PICK UP MP

JC66-00893A CAM-M-SHAFT

JC96-02686B ELA UNIT-ROLLER P/UP MP

JC61-00705A HOLDER-M-PICKUP MP

JC61-00685A HOUSING-M-PICK UP MP

JC73-00224A RUBBER-PICK UP MP

JC97-02238A MEA UNIT-GEAR IDLE

JC61-01200A BRACKET-P-GEAR IDLE

JC66-00872A GEAR-FUSER IDLE 3

JC66-00859A GEAR-M-FUSER IDLE 2

JC66-00858A GEAR-M-FUSER DRV IN

JC66-00868A CLUTCH-M-HUB

JC66-01155A GEAR-FUSER RDCN OUT V

6044-000231 RING-E

JC96-03403A ELA HOU BASE-HOLDER

JC61-01248A FRAME-M-HOLDER PAD

JC61-00684A HOLDER-M-PAD

JC73-00132A RPR-FRICTION PAD MP

JC61-00387A SPRING ETC-PAD

JC72-01365A PMO-ACTUATOR EMPTY MP

JC61-70965A SPRING ETC-EMPTY

0604-001095 PHOTO-INTERRUPTER

JC39-00451A CBF HARNESS-MP_EMPTY

JC97-01034A MEA RACK-EXIT ROLLER

JC72-41006A PMO-HOLDER EXIT ROLL

JC72-41007A PMO-ROLLER FD F

JC72-41008A PMO-ROLLER FD R

JC61-70911A SPRING ETC-EXIT ROLL FD

JC66-00883A ROLLER-EXIT_F/DOWN

JC72-01310A PMO-ACTUATOR OUTFULL

JC66-00674A GEAR-M-EXIT Z17

JC61-01262A BUSH-M_EXIT D7

JC66-00854A GEAR-M-EXIT DUP Z21

JC96-02127A ELA HOU-CST SENSOR HAWK16

JC92-01336A PBA SUB-CASSETTE

JC70-00192A IPR-PLATE SENSOR

JC70-00195A IPR-BRACKET SENSOR

JC39-00261A CBF HARNESS-SENSOR

JC61-00675A GUIDE-P_REGI UPPER

JC61-70918A SPRING ETC-LEVER

JC61-00691A GUIDE-PLATE PAPER

JC70-00339A IPR-P_GROUND PLATE PAPER

0604-001095 PHOTO-INTERRUPTER

JC39-00458A CBF HARNESS-THERM

JC61-01581A HOUSING-M_TERMINAL

JC65-00013A TERMINAL-P-FUSER

JC39-00456A CBF HARNESS-FUSER

JC67-00099A CAP-M-HOUS_TERM

JC63-01132A SHIELD-CTRL

JC63-00677A GROUND-P-MOTOR_DEVE

JC63-00669A GROUND-P_GUIDE TR

JC63-00672A GROUND-P-REGI_ROLLER

JC63-00678A GROUND-P-PICK_UP_MP

JC63-00673A GROUND-P-SCF_MAIN

JC63-00671A GROUND-P-MOTOR_MAIN

JC63-00680A GROUND-P-GUIDE_DUP

JC67-00093A CAP-M-GUIDE_HARNESS

JC72-01356A PMO-DUMMY_DEVE

JC96-01772A ELA HOU-VARISTOR

JC61-40001A FOOT-ML80

JC72-01355A PMO-REMOVE_LOCK_CST

JC72-41191B PMO-BEARING SHAFT

JC96-03960A ELA HOU-FRAME_LSU_LO

JC61-01732A FRAME-PART_UPPER

JC92-01807A PBA SUB-TONER_SENSOR

JC65-00004A TERMINAL-P_DEVE

JC92-01730A PBA SUB-COVER OEPN

Samsung Electronics

Z4457

Z4458

Z4459

Z4460

Z4461

Z4462

Z0016

K3053

H1256

Z4452

K4277

H1249

Z4453

Z4454

Z4455

Z4456

F0003

L6040

P0032

Z4463

Z4464

Z4465

T2175

M0443

S3058

S3055

H1242

G2082

L4097

G2091

P5064

P0013

O1053

D4089

K3819

G0331

S4014

G0200

Z2263

Z4451

Z4446

Z4536

R0006

H1297

Z4448

H4029

R0019

S0028

W3028

O1099

P0013

H1253

E4060

E4126

P0048

P0049

Service(SA:service available, SNA:service not available)

Location

Z4398

Z4398

Z4440

Z4441

Z4442

P0042

P2043

K3144

P2062

H0025

C4024

E4065

Z4443

Z4444

Z4445

QT'Y

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

4

1

1

1

6

1

2

1

1

1

2

1

1

1

1

1

1

1

2

1

1

1

1

1

1

1

4

1

1

1

1

1

1

1

1

1

2

1

1

1

1

1

1

1

1

1

1

1

1

1

1

2

1

1

1

1

Remark

110V

220V

Service

SNA

SNA

SNA

SNA

SNA

SNA

SA

SA

SA

SNA

SA

SA

SNA

SA

SNA

SNA

SA

SA

SA

SA

SNA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SNA

SNA

SA

SA

SNA

SA

SA

SA

SA

SA

SA

SA

SNA

SNA

SNA

SNA

SA

SA

SNA

SA

SA

SA

SA

SA

Service Manual 7-9

Exploded Views & Parts List

Drawer#

7.3-69

7.3-71

7.3-72

7.3-73

7.3-76

7.3-77

7.3-78

7.3-79

7.3-61

7.3-62

7.3-63

7.3-64

7.3-65

7.3-66

7.3-67

7.3-68

7.3-59-5-1

7.3-59-5-2

7.3-59-6

7.3-59-7

7.3-59-8

7.3-59-9

7.3-59-10

7.3-60

7.3-52

7.3-53

7.3-54

7.3-55

7.3-56

7.3-57

7.3-58

7.3-59

7.3-59-1

7.3-59-2

7.3-59-2-1

7.3-59-2-2

7.3-59-2-3

7.3-59-3

7.3-59-4

7.3-59-5

7.3-49-7

7.3-49-8

7.3-49-9

7.3-49-10

7.3-49-11

7.3-49-12

7.3-49-14

7.3-50

7.3-50-1

7.3-50-2

7.3-50-3

7.3-50-4

7.3-50-5

7.3-50-6

7.3-50-7

7.3-51

7.3-47-5

7.3-48

7.3-48-1

7.3-48-2

7.3-48-3

7.3-48-4

7.3-48-5

7.3-48-6

7.3-48-7

7.3-48-8

7.3-49

7.3-49-2

7.3-49-3

7.3-49-4

7.3-49-5

7.3-49-6

SEC_Code Description

JC67-00095A CAP-M_COVER_OPEN

JC96-03425A ELA UNIT-FEED3X5

JC61-01240A HOLDER-M-SAW

JC61-01235A GUIDE-P-TRANSFER_FRONT

JC61-01236A PLATE-P-SAW

JC66-00889A SHAFT-M ROLLER_BELT

JC66-00887A ROLLER-M IDLE_BELT

JC70-20901A IEX-SHAFT IDLE F/UP

JC73-00206A RUBBER-BELT_FEED

JC61-01239A GUIDE-M SHAFT_BELT

JC96-04016A ELA UNIT-ROLLER_IDLE

JC61-00635A HOUSING-M-RETARD

JC73-00207A RUBBER-RETARD

JC72-00993A PMO-HUB OUT RETARD

JC66-01273A SHAFT-IDLE FEED

JC64-00271A SHUTTER-PATH_FEED

JC61-01550A STOPPER-SPACE

JC64-00272A SHUTTER-CLAW

JC61-01741A HOLD-IDLE FRONT

JC61-00652A BUSH-M-RETARD

JC61-00387A SPRING ETC-PAD

JC61-01739A HOLD-IDLE REAR

JC64-00270A SHUTTER-TENSION

JC96-03421A ELA UNIT-FEED2 IDLE

JC61-01242A HOLDER-IDLE_FEED2

JC67-00105A CAP-M IDLE_FEED2

JC61-00387A SPRING ETC-PAD

JC61-00652A BUSH-M-RETARD

JC66-00912A SHAFT-IDLE_FEED2

6044-000231 RING-E

JC66-00892A ROLLER-M IDLE_FEED2

JC61-01250A STOPPER-M-KNOCK UP MP_L

JC61-01249A STOPPER-M-KNOCK UP MP_R

JC61-01252A RAIL-M-LEFT_DUP

JC61-01253A RAIL-M-RIGHT_DUP

JC72-41191B PMO-BEARING SHAFT

JC66-01262A GEAR-FEED

JC72-01362A PMO- M CAM_PICK_UP

JC72-00991A PMO-ACTUATOR EMPTY

JC96-03422A ELA UNIT-PICK UP

JC66-00910A SHAFT-PICK UP

JC97-02233A MEA UNIT-P/UP_HOUSING

JC72-01361A PMO-M IDLE-PICK UP

JC61-01238A HOUSING-M-PICK UP

JC73-00223A RUBBER-PICK_UP

JC61-01579A HOLDER-P-REGI

JC66-00911A SHAFT-FEED1

JC81-03458A AS-UNIT_FEED1

JC61-01237A HOUSING-M-FEED1

JC73-00208A RUBBER-FEED1

JC63-00674A GROUND-P-PICK_UP_MAIN

JC61-01579A HOLDER-P-REGI

JC72-00382B PMO-BUSHING FEED

JC61-01234A GUIDE-P-FRONT-DUP-PICKUP

JC61-01233A GUIDE-M SUPPORT-PICKUP

JC96-04119A ELA UNIT-FEED

JC92-01704A PBA SUB-JOINT

JC39-00441A CBF HARNESS-TRAY OUT

JC67-00094A CAP-M_POWER

JC39-00624A HARNESS-INLET

JC66-00888A SHAFT-M BELT_GEAR

JC72-41191B PMO-BEARING SHAFT

JC66-00674A GEAR-M-EXIT Z17

JC67-00092A CAP-M-DEVE_MOTOR

JC39-00449A CBF HARNESS-DUPLEX

JC67-00036A CAP-M-WIRE PTL LOWER

JC65-00001A TERMINAL-P_PTL

JC92-01516A PBA SUB-PTL2

JC92-01512B PBA SUB-EXIT SENSOR

JC92-01261C PBA SUB-FUSER SW

JC61-01218A GUIDE-M-FRONT

JC65-00010B TERMINAL-GUIDE_FRONT

7-10

Service Manual

ͶΩΡΝΠΕΖΕ·ΚΖΨ͑΁ΒΣΥΤ͑ͽΚΤΥ

L6039

Z4486

C4025

Z4487

C4028

K2860

Z4488

C4022

L6058

P0032

Z4484

Z4485

K3816

K3141

S4118

G0471

S0028

K2883

S4108

R0006

Z4483

H3074

H3075

L6057

Z4477

K2883

S0028

Z4479

Z4480

K3060

Z4481

Z4482

Z4493

Z4494

Z4495

P0032

G0331

Z4496

Z4497

C1015

Z4489

Z4487

O1102

Z4490

Z4491

Z4492

M0448

H1257

K4276

M0411

M0445

M0447

G0442

Service(SA:service available, SNA:service not available)

Location

C4020

Z4472

Z4473

H6035

C4026

K4021

Z4474

Z4475

Z4476

Z4466

K3062

Z4467

Z4468

Z4469

Z4470

Z4471

D2149

QT'Y

1

1

1

1

1

1

1

1

1

1

2

1

1

1

1

1

1

1

1

1

2

1

1

1

1

1

1

1

2

1

1

1

1

1

1

1

1

1

1

1

1

1

1

2

2

2

1

2

2

2

2

1

1

2

2

2

1

1

1

1

1

1

2

1

2

2

1

1

1

1

1

1

Remark Service

SA

SA

SNA

SA

SNA

SA

SA

SNA

SNA

SA

SNA

SNA

SA

SNA

SNA

SA

SNA

SA

SA

SA

SA

SA

SA

SNA

SA

SA

SA

SNA

SA

SNA

SA

SA

SA

SA

SA

SA

SNA

SNA

SA

SA

SNA

SNA

SA

SA

SA

SA

SNA

SA

SNA

SNA

SA

SA

SA

SA

SA

SA

SA

SNA

SA

SA

SA

SA

SA

SA

SNA

SA

SNA

SNA

SNA

SNA

SNA

SA

Samsung Electronics

Drawer#

7.3-92

7.3-93

7.3-94

7.3-95

7.3-96

7.3-97

7.3-98

7.3-99

7.3-81

7.3-82

7.3-83

7.3-84

7.3-86

7.3-89

7.3-90

7.3-91

SEC_Code Description

JC72-00317A PMO-GUIDE DEVE L

JC72-00318A PMO-GUIDE DEVE R

JC61-70932A SPRING ETC-GUIDE DEVE

JC65-00008A TERMINAL-P-TR_KESTREL

JC65-00009A TERMINAL-SPRING_TR

JC63-00679A GROUND-P-ZENER

JC63-00676A GROUND-P-FUSER

JC65-00006A TERMINAL-P_HV CARDINAL

JC97-01401A MEA UNIT-TERMINAL:TR

JC39-00625A HARNESS-HVPS

JC70-00332A IPR-P_GROUND OPC

JC92-01831A PBA SUB-EMPTY

JC39-00620A HARNESS-SENSOR

JC92-01262C PBA SUB-FEED SENSOR

JC67-00098A CAP-M_HV

JC67-00097A CAP-M_SENSOR_FEED

Service(SA:service available, SNA:service not available)

Location

Z4500

Z4501

O0020

Z4502

Z4503

M0446

Z4504

Z4505

T2158

T2159

Z4159

K4278

K4279

Z4498

Z4499

K4272

QT'Y

1

1

1

1

1

1

4

1

1

4

1

1

2

1

1

1

Service

SA

SA

SA

SA

SA

SA

SNA

SNA

SA

SA

SA

SA

SA

SNA

SNA

SA

Remark

Samsung Electronics

Service Manual 7-11

Exploded Views & Parts List

7.4 Fuser Unit

1-14

1-14

1-8

1-3

0 1-2

1-26

1-15

1-11

1-7

1-9

1-10

1-12

1

1-1

1-19

1-18

1-27

1-21

1-17

1-16

1-29

1-6

1-4

1-28

1-5

1-19

1-17

1-13

1-22

1-20

H

4-3

4-2

3

3-7

3-6

3-5

3-2

3-3

3-15

3-4

3-1

3-9

3-14

3-16

3-2

3-3

2-1

4-1

4-5

2-3

2-2

2-4

4

1-24

1-23

2

4-4

4-6

3-10

3-6

3-8

3-11

3-13

3-12

3-14 3-9

3-7

7 -12 Service Manual

Samsung Electronics

Drawer#

7.4-3-7

7.4-3-8

7.4-3-10

7.4-3-11

7.4-3-12

7.4-3-13

7.4-3-14

7.4-4

7.4-4-1

7.4-4-2

7.4-4-6

7.4-1-16

7.4-1-17

7.4-1-19

7.4-1-21

7.4-1-22

7.4-1-24

7.4-1-25

7.4-1-26

7.4-1-28

7.4-2-1

7.4-2-3

7.4-3

7.4-3-1

7.4-3-3

7.4-3-5

7.4-3-6

7.4-0

7.4-0

7.4-1

7.4-1

7.4-1-2

7.4-1-4

7.4-1-5

7.4-1-8

7.4-1-9

7.4-1-10

7.4-1-12

7.4-1-13

7.4-1-15

7.4-1-KIT

7.4-1-KIT

7.4-1-16

SEC_Code Description

JC96-03957B ELA UNIT-FUSER_220V

JC96-03957A ELA UNIT-FUSER_110V

JC96-03958A ELA UNIT-FUSER_UPPER

JC96-03958B ELA UNIT-FUSER_UPPER

JC71-00056A ELECTRODE-P-FU_L_08

JC72-41012C PMO-GUIDE CLAW GREEN

6107-001165 SPRING-TS

JC61-01215A HOLDER-M-LEVER_L

JC61-00785A HOLDER-M-IDLE ROLLER

JC72-40981A PMO-ROLLER UPPER DP

JC61-01216A HOLDER-M-LEVER_R

JC71-00052A ELECTRODE-P-SUPPORT

6003-000196 SCREW-TAPTITE

JC96-04058A ELA UNIT-HEAT

JC96-04058B ELA UNIT-HEAT

JC66-01268A ROLLER-HEAT

JC66-01268B ROLLER-HEAT

6601-001384 BEARING-BALL

JC61-01260A BUSH-M_HR

JC61-01550A STOPPER-SPACER

JC71-00051A ELECTRODE-FU

JC67-00111A CAP-M_ACTUATOR_UP

JC63-00726A COVER-M-REAR GUIDE UP

JC71-00055A ELECTRODE-P-SU CARBON

JC61-01284A HOLDER-P-SL CONNECTOR

JC61-01213A BRACKET-P-FUSER

JC66-00869A GEAR-M-IDLE 25

JC97-02630A MEA UNIT-FUSER_LOWER

JC66-00931A ROLLER-PRESSURE

6107-001304 SPRING-CS

JC66-00880A LEVER-P-RELEASE_L

6107-001304 SPRING-CS

JC67-00102A CAP-M-FUSER LOCK

JC66-00881A LEVER-P-RELEASE_R

JC63-00683A GROUND-P-HR

JC61-70903A SPRING ETC-ACTUATOR

JC72-01358A PMO-ACTUATOR EXIT

JC67-00103A CAP-M-ACTUATOR

6003-000196 SCREW-TAPTITE

JC97-02631A MEA UNIT-FUSER_GU_R

JC61-01226B GUIDE-M_REAR

JC72-00382A PMO-BUSHING TX

JC61-01549A HOLDER-M REAR_LEVER

Z4530

Z4533

Z4534

Z4535

Z4132

Z4536

Z4537

Z4397

Z4524

Z4525

Z4526

Z4527

Z4528

K4222

Z4530

Z4532

Z4539

Z4540

Z4606

Z4542

Z4518

Z4518

Z4519

S4015

Z4476

Z4521

Z4522

Z4523

Z4509

H4027

K4068

Z4510

Z4511

Z4397

Z6118

Z6118

Service(SA:service available, SNA:service not available)

Location

Z4506

Z4506

Z4507

Z4507

Z4508

Z0018

QT'Y

1

1

1

1

2

1

1

1

1

1

2

1

2

4

1

2

31

1

1

1

1

2

3

3

2

1

1

5

1

1

1

1

2

1

1

1

1

1

2

1

1

2

1

Remark

220V

110V

110V

220V

110V

220V

110V

220V

Service

SNA

SNA

SNA

SNA

SA

SA

SNA

SA

SNA

SNA

SA

SNA

SNA

SNA

SNA

SNA

SA

SA

SNA

SNA

SA

SNA

SNA

SNA

SA

SA

SNA

SNA

SNA

SA

SA

SNA

SNA

SNA

SNA

SA

SNA

SNA

SA

SNA

SNA

SNA

SNA

Samsung Electronics

Service Manual 7-13

Exploded Views & Parts List

7.5 REGI Assembly

0

7-14

Service Manual

9

6

7

6

16

5

15

2

3

4

1

4

15

5 16

15

6

10

6

15

13

14

12

11

Samsung Electronics

Drawer#

7.5-0

7.5-1

7.5-2

7.5-3

7.5-4

7.5-5

7.5-6

7.5-7

7.5-8

7.5-9

7.5-10

7.5-11

7.5-12

7.5-13

7.5-14

SEC_Code Description

JC96-03959A ELA UNIT-REGI

JC61-00674A GUIDE-P_REGI LOWER

JC66-00450A ROLLER-REGI LOWER L

JC66-00446A SHAFT-REGI UPPER

JC66-00647A ROLLER-M_REGI IDLE L25

JC66-00648A ROLLER-M_REGI IDLE S25

6044-000231

6107-001165

RING-E

SPRING-TS

JC72-00998A PMO-ACTUATOR REGISHUTTER

JC61-00670A GUIDE-P_REGI PLATE

JC75-00095A MEC-BRUSH ANTISTATIC

JC61-00669A BUSH-M-ROLLER REGI U

JC66-00420A GEAR-REGI Z25

JC61-00669A BUSH-M-ROLLER REGI U

6107-001155 SPRING-ES

Service(SA:service available, SNA:service not available)

Location

Z4408

G2080

Z4543

S0010

R0014

R0015

R0006

P0030

G2081

M0022

B0029

G0415

B0029

Z4544

QT'Y

1

2

2

1

2

1

1

4

1

2

2

1

1

1

1

Service

SA

SA

SA

SA

SA

SA

SA

SA

SA

SNA

SA

SA

SA

SA

SA

Remark

Samsung Electronics

Service Manual 7-15

7.6 Main Motor Assembly

12

0

4

3

3

5

3

9

11

10

8

3

6

3

7

1

2

16

16

16 16 17

14

716 Service Manual

Samsung Electronics

Drawer#

7.6-0

7.6-1

7.6-2

7.6-3

7.6-4

7.6-5

7.6-6

7.6-7

7.6-8

7.6-9

7.6-10

7.6-11

7.6-12

7.6-14

SEC_Code

JC96-04063A ELA UNIT-MAIN

Description

JC61-01204A BRACKET-P-MAIN

JC31-00040A MOTOR DC-BLDC MAIN

6031-001255 WASHER-PLAIN

JC66-00867A GEAR-M-OPC DRV

JC66-00864A GEAR-M-REGI DRV

JC66-00860A GEAR-M-RDCN FUSER

JC66-00875A GEAR-M-FUSER IDLE 1

JC66-00865A GEAR-M-RDCN REGI

JC66-00866A GEAR-M-RDCN PICK UP

JC66-00861A GEAR-M-MP DRV

JC66-00862A GEAR-M-FEED DRV

JC66-00873A GEAR-M-RDCN MP

JC66-00863A GEAR-M-PICK UP DRV

Service(SA:service available, SNA:service not available)

Location

Z4410

Z4545

B5013

W0004

Z4546

Z4547

Z4548

Z4549

Z4550

Z4551

Z4552

Z4553

Z4554

Z4555

QT'Y

1

1

1

1

1

1

1

1

1

1

1

2

1

1

Service

SNA

SNA

SNA

SNA

SNA

SNA

SA

SNA

SA

SA

SNA

SNA

SNA

SNA

Remark

Samsung Electronics

Service Manual 7-17

Exploded Views & Parts List

7.7 Deve Motor Assembly

0

7

4

3

5

6

7

2

10

8

8

1

8

9

7-18

Service Manual

Samsung Electronics

Drawer#

7.7-0

7.7-1

7.7-2

7.7-3

7.7-4

7.7-5

7.7-6

SEC_Code Description

JC96-03408A ELA UNIT-DEVE MOTOR

JC31-00039A MOTOR DC-BLDC DEVE

JC61-01201A BRACKET-P-DEVE

JC61-01203A BRACKET-P-SWING

JC66-00915A SHAFT-SWING DEVE

JC66-00871A GEAR-M-RDCN DEVE

JC66-00857A GEAR-M-SWING

Service(SA:service available, SNA:service not available)

Location

K3057

B5012

Z4556

Z4557

Z4558

Z4559

Z4560

QT'Y

1

1

1

1

1

1

1

Service

SA

SA

SNA

SNA

SNA

SNA

SNA

Remark

Samsung Electronics

Service Manual 7-19

Exploded Views & Parts List

7.8 Duplex Sorenoid Assembly

720

Service Manual

12

6

6

6

5

3

3

13

2

0

1

6

10

5

14

8

9

11

Samsung Electronics

Drawer#

7.8-0

7.8-1

7.8-2

7.8-3

7.8-4

7.8-5

7.8-6

7.8-8

7.8-9

7.8-10

7.8-11

7.8-12

SEC_Code

JC96-03426A ELA UNIT-EXIT SOL

JC61-01205A BRACKET-P-EXIT

JC66-00869A GEAR-M-IDLE 25

JC66-00869A GEAR-M-IDLE 25

JC66-40911A GEAR-DP,IDLE

JC66-00100A GEAR-6

6031-001255

Description

WASHER-PLAIN

JC33-00008A SOLENOID-DUPLEX

JC61-01202A BRACKET-P-LINK SWING

JC66-00855A GEAR-M-SWING DUPLEX

JC66-00856A GEAR-M-RDCN EXIT

JC66-00916A SHAFT-SWING DUPLEX

Service(SA:service available, SNA:service not available)

Location

K3059

Z4561

Z4527

Z4527

G0198

Z4562

W0004

S8014

Z4563

Z4564

Z4565

Z4566

QT'Y

4

1

1

3

1

1

1

1

1

1

1

1

Service

SA

SNA

SNA

SNA

SA

SNA

SA

SA

SNA

SNA

SNA

SNA

Remark

Samsung Electronics

Service Manual 7-21

Exploded Views & Parts List

7.9 Cassette Assembly

7-22

Service Manual

Samsung Electronics

7.9-21

7.9-22

7.9-23

7.9-24

7.9-25

7.9-26

7.9-27

7.9-27

7.9-28

7.9-8

7.9-9

7.9-10

7.9-11

7.9-11

7.9-12

7.9-13

7.9-14

7.9-15

7.9-16

7.9-17

7.9-18

7.9-19

7.9-20

Drawer#

7.9-0

7.9-0

7.9-1

7.9-2

7.9-3

7.9-4

7.9-5

7.9-5

7.9-6

7.9-7

SEC_Code Description

JC96-04015A ELA UNIT-CASSETTE

JC96-04015B ELA UNIT-CASSETTE

6002-000440 SCREW-TAPPING

JC64-00189B INDICATOR-M_EMPTY

JC61-01244A GUIDE-P-SIDE_R

JC61-01225B GUIDE-M_SIDE LOCK

JC61-01220B FRAME-M_CASSETTE

JC61-01220C FRAME-M_CASSETTE

JC61-00751A GUIDE-P-REAR PAPER CST

JC61-01226B GUIDE-M_REAR

JC61-00267B GUIDE-M-LOCK A

JC61-00414A SPRING ETC-GUIDE PAPER

JC64-00190B KNOB-M_REAR

JC61-01224B GUIDE-M_EXTENSION CST

JC61-01224C GUIDE-M_EXTENSION CST

JC61-01223A BRACKET-P-EXTENTION

JG61-70531A SPRING ETC-LOCKER,PLATE

JG66-40003A GEAR-PINION

JC67-00037A CAP-M-GUIDE SIDE,L

JC61-01222A GUIDE-P-SIDE_L

JC72-41210A PMO-LOCKER PLATE

JC61-01227A GUIDE-M-PAPER SIZE

JC97-02234A MEA UNIT-HOLDER PAD

JC61-70911A SPRING ETC-EXIT ROLL FD

JC61-01228A HOLDER-M-PAD_HOUSING

JC61-01724A GUIDE-PAPER

JC64-00268A SHUTTER-PATH

JC61-00455A SPRING ETC-PLATE K/UP

JC61-01245A PLATE-P-KNOCK UP

JC73-00141A RPR-PAD CASSETTE

JC61-01221B GUIDE-M_HANDLE

JC61-01221C GUIDE-M_HANDLE

JC68-01552A LABEL(R)-CASSETTE

2

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

QT'Y

1

1

8

Z4574

Z4574

Z4575

S0025

O1127

C1014

Z4571

L6038

Z4579

G0469

O1053

Z4576

Service(SA:service available, SNA:service not available)

Location

Z4423

Z4423

Z4418

Z4569

Z4573

Z4572

Z4567

Z4567

G2088

Z4540

G2068

Z4247

Z4228

Z4570

R0020

Z4568

Z4568

Service

SA

SA

SA

SNA

SNA

SNA

SNA

SNA

SA

SNA

SA

SA

SA

SNA

SA

SNA

SA

SA

SNA

SA

SNA

SNA

SNA

SNA

SA

SNA

SNA

SA

SNA

SA

SNA

SNA

SNA

Remark

ML-4551NDR

ML-4551NDR

ML-4551NDR

ML-4551NDR

Samsung Electronics

Service Manual 7-23

Exploded Views & Parts List

7.10 Duplex Unit

3

9

0

10

11

7-

24

Service Manual

8

16

2

26

25

26

24

33

27

32

30

4

31

30

28

29

28

20

6

7

12

13

14

15

1

17

18

19 20

21

22

5

23

Samsung Electronics

Drawer#

7.10-14

7.10-15

7.10-16

7.10-17

7.10-18

7.10-19

7.10-20

7.10-21

7.10-22

7.10-23

7.10-24

7.10-25

7.10-26

7.10-27

7.10-28

7.10-29

7.10-30

7.10-32

7.10-33

7.10-34

7.10-0

7.10-0

7.10-1

7.10-2

7.10-3

7.10-3

7.10-4

7.10-5

7.10-6

7.10-7

7.10-8

7.10-8

7.10-10

7.10-11

7.10-12

7.10-13

SEC_Code Description

JC96-03412C ELA UNIT-DUPLEX

JC96-03412E ELA UNIT-DUPLEX

JC61-01254A FRAME-M-DUPLEX

JC61-01255A GUIDE-M-UPPER_DUP

JC63-00693B COVER-M_REAR_DUP

JC63-00693C COVER-M_REAR_DUP

JC61-01697A GUIDE-M_ALIGN_DPX

JC67-00107A CAP-M-CONNECTOR_DUP

JC67-00106A DUCT-M-FAN_DUP

JC31-00004A FAN-DC_HAWK

JC92-01679A PBA SUB-DUPLEX

JC92-01883A PBA-DPX

JC70-00512A IPR-TERMINAL GND_DUP

JC64-00191A LOCKER-M-DUP

JC63-00706A SHEET-FRAME_DUP

6107-001165 SPRING-TS

JC72-01366A PMO-ACTUATOR FEED DUP

JC92-01362A PBA SUB-MP SEN

JB39-00103A CBF HARNESS-LIU GND

JC31-00009A MOTOR STEP

JC61-01257A BRACKET-P-MOTOR_DUP

JC66-00897A PULLEY-M-30_DUP

6602-001084 BELT-TIMING GEAR

JC66-00898A PULLEY-M-30-DUMMY_DUP

6044-000231 RING-E

JC39-00450A CBF HARNESS-D_JOINT

JC66-00444A SHAFT-IDLE ROLL, DUP

JC66-00896A ROLLER-M-IDLE_ DUP

JK72-00058A PCT-SILP WASHER

JC61-01277A SPRING ETC-DUP

JC66-00900A PULLEY-M-18-DUMMY_DUP

JC66-00899A PULLEY-18_DUP

JC61-00665A BUSH-M-FEED, DUP

JC66-00901A ROLLER-FEED_DUP

6044-000107 RING-C

JC70-00457A ICT-STUD PAPER GUIDE, DP

Service(SA:service available, SNA:service not available)

Location

Z6089

Z6089

Z6096

Z6097

Z6099

Z6099

Z4412

Z4413

F5018

Z6105

Z6105

Z6104

Z6102

Z4619

Z4483

M0395

L5004

M2150

Z4547

Z6103

Z6091

Z4419

R0006

Z6093

S4108

D2117

Z4553

D2119

D2118

F6042

D2145

Z4396

G2098

QT'Y

4

2

4

2

2

2

1

1

1

3

4

1

2

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

Remark

ML-4551NDR

ML-4551NDR

ML-4551NDR

Service

SA

SA

SA

SA

SNA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SA

SNA

SA

Samsung Electronics

Service Manual 7-25

Exploded Views & Parts List

7.11 SCF Unit

7-26

Service Manual

Samsung Electronics

SEC_Code

JC96-04015D

JC96-04015E

6002-000440

JC64-00189B

JC61-01244A

JC61-01225C

JC61-01220B

JC61-01220C

JC61-00751A

JC61-01226C

JC61-00267D

JC61-00414A

JC64-00190C

JC61-01224B

JC61-01224C

JC61-01223A

JG61-70531A

JG66-40003A

JC67-00037A

JC61-01222A

JC72-41210A

JC61-01227A

JC97-02844A

JC61-70911A

JC61-01228A

JC61-01724A

JC64-00268A

JC61-00455A

JC61-01245A

JC73-00141A

JC61-01221B

JC61-01221C

JC68-01552A

JC61-00064A

JC63-01206A

7.11-12

7.11-13

7.11-14

7.11-15

7.11-16

7.11-17

7.11-18

7.11-19

7.11-20

7.11-21

7.11-22

7.11-23

7.11-24

7.11-25

7.11-26

7.11-27

7.11-27

7.11-28

7.11-30

7.11-32

Drawer#

7.11-0

7.11-0

7.11-1

7.11-2

7.11-3

7.11-4

7.11-5

7.11-5

7.11-6

7.11-7

7.11-8

7.11-9

7.11-10

7.11-11

7.11-11

Description

ELA UNIT-CASSETTE

ELA UNIT-CASSETTE

SCREW-TAPPING

INDICATOR-M_EMPTY

GUIDE-P-SIDE_R

GUIDE-M_SIDE LOCK

FRAME-M_CASSETTE

FRAME-M_CASSETTE

GUIDE-P-REAR PAPER CST

GUIDE-M_REAR

GUIDE-M_LOCK A

SPRING ETC-GUIDE PAPER

KNOB-M_REAR

GUIDE-M_EXTENSION CST

GUIDE-M_EXTENSION CST

BRACKET-P-EXTENTION

SPRING ETC-LOCKER,PLATE

GEAR-PINION

CAP-M-GUIDE SIDE,L

GUIDE-P-SIDE_L

PMO-LOCKER PLATE

GUIDE-M-PAPER SIZE

MEA-UNIT_HOLDER PAD

SPRING ETC-EXIT ROLL FD

HOLDER-M-PAD_HOUSING

GUIDE-PAPER

SHUTTER-PATH

SPRING ETC-PLATE K/UP

PLATE-P-KNOCK UP

RPR-PAD CASSETTE

GUIDE-M_HANDLE

GUIDE-M_HANDLE

LABEL(R)-CASSETTE

SPRING ETC-CLAW

GROUND-CASSETTE

Service(SA:service available, SNA:service not available)

Location

Z4423

Z4423

Z4418

Z4569

Z4573

Z4567

Z4567

G2088

Z4247

Z4574

Z4574

Z4575

S0025

O1127

C1014

Z4571

L6038

Z4579

Z4424

O1053

Z4576

Z4228

Z4570

R0020

Z4568

Z4568

O1032

Z6101

QT'Y

1

1

1

1

1

2

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

8

1

1

1

Remark

ML-4551NDR

ML-4551NDR

ML-4551NDR

ML-4551NDR

Service

SNA

SNA

SNA

SA

SNA

SA

SNA

SNA

SA

SA

SA

SNA

SA

SNA

SA

SA

SNA

SA

SA

SA

SNA

SNA

SA

SNA

SNA

SNA

SNA

SA

SA

SA

SNA

SNA

SNA

SNA

SNA

Samsung Electronics

Service Manual 7-27

8

8. Block Diagram

8.1 System Block Diagram

Block diagram

Samsung Electronics

Service Manual

8-1

Block diagram

8-2

Service Manual

Samsung Electronics

9

9. Connection Diagram

2

1

4

3

6

5

8

7

PWM_DEV_AC

24V

PWM_DEV_Vpp

24V

DEV_AC_CON

24V

PWM_DEV_DC

24VS

1

2

3

4

5

6

7

8

10

9

12

PWM_FUSER_BIAS

24VS

PWM_MHV

9

10

11

19

22

21

24

23

26

25

11

14

13

16

15

18

17

20

28

27

VCC

HVPS_PSAVE

PWM_THV

GND

VCC

THV_READ

VCC nTHV_EN

GND

FUSER_ON

GND

Fuser_Cover

GND

MHV_READ

GND

GND

GND

20

21

22

23

24

25

26

12

13

14

15

16

17

18

19

27

28

VCC

PTL_ON

1

2

7

10

9

12

11

14

6

5

4

3

8

2

1

13

16

15

18

17

20

24V 1

FAN_MAIN_FEEDBA 2

FAN_MAIN 3

FAN_SMPS_FEEDBA 4

FAN_SMPS

P_FEED

3.3V

7

5

6

GND

OUTBIN_FULL

EEPRIM_SDA

VCC

EEPROM_SCL

P_MARGIN

8

9

10

11

12

13

GND

P_REGI

P_SIZE1

P_EMPTY

P_SIZE2

P_SIZE3

14

15

16

17

18

19

20

24VS

MAIN_CLUTCH

MP_CLUTCH

REGI_CLUTCH

MP_EMPTY

3.3V

CASSETTE_DETECT 7

DGND

Temp1

8

9

5

6

1

2

3

4

5V

3.3V

PANEL_TXD

PANEL_RXD nRSTOUT

DGND

1

2

3

4

5

6

3.3V

TDO nTRST

TCK

TMS

TDI nRESET

GND

24V

3.3V

3.3V

Duplex_RXD nDuplex_Detect

Duplex_TXD

GND

6

7

8

3

4

5

1

2

6

7~8

3

4

5

1

2

4

5

6

1

2

3

7

8

9

24VS

24VS

DGND

DGND

DGND

5V nMAIN_MOT_ON

MAIN_MOT_READY

MAIN_MOT_CLK

9

10

11

12

13

14

15

6

7

4

5

8

1

2

3

16

17

18

DGND

LSU_5VS

LD_POWER2

LD_POWER1

VDO1_minus

VDO1_plus

VDO2_minus

VDO2_plus nLD_EN nSH1 nHSYNC_plus nSH2

LSU_CLK nHSYNC_minus nLREADY nLSU_MOT_ON

DGND

24VS

10

9

12

11

14

13

16

5

8

3

6

7

2

1

4

15

18

17

56~60

55

53

52

51,54

50

32~49

31

15~30

12~14

11

10

4

3

6

5

2

1

9

8

7

5V

3.3V

SDA

SCL

DGND

N.C

DGND

N.C

DATA

ADDR nHDD_CS0 nHDD_CS1

N.C

nHDD_IORDY

N.C

3.3V

nWR nRD nINT_HDD

3.3V

nRSTOUT

1

2

3

1

2

4

5

6

7

1

2

3

1

2

3

1

2

3

4

1~2

3~4

5,7

6

8

9

24V

24VS

N.C

LSU_SAVE

VCC

LSU_5V

Therm_IN

GND

Fuser_ON

24VS

DGND nDEV_MOT_RDY

DEV_MOT_CLK nDEV_MOT_ON

DEV_MOT_DIR

N.C

DGND

3.3V

P_EXIT

24VS

GND

3.3V

DEBUG_RXD

DEBUG_TXD

DGND

Connection Diagram

Service Manual

9-1

Samsung Electronics

Connection Diagram

9-2

Service Manual

Connection Diagram

Samsung Electronics

Service Manual

9-3

1 1 Reference Information

1

This chapter contains the tools list, list of abbreviations used in this manual, and a guide to the

Network information definition is also included.

11.1 Tool for Troubleshooting

The following tools are recommended safe and easy troubleshooting as described in this service manual.

DVM (Digital Volt Meter)

Standard : Indicates more than 3 digits.

• Cleaning Equipments

Standard : An IPA(Isopropyl Alcohol)dry wipe tissue or a gentle neutral detergent and lint-free cloth.

• Driver

Standard : "-" type, "+" type (M3 long, M3 short, M2 long, M2 short).

• Vacuum Cleaner

• Tweezers

Standard : For general home use, small type.

• Software (Driver) installation CD ROM

• Cotton Swab

Standard : For general home use, for medical service.

Service Manual

11-1

Samsung Electronics

Reference Information

11.2 Acronyms and Abbreviations(1)

The table below explains the abbreviations and acronyms used in this service manual. Where abbreviations or acronyms are used in the text please refer to this table.

Abbreviations

HV

HVPS

I/F

I/O

IC

IDE

EPP

FPOT

F/W

GDI

GND

HBP

HDD

H/H

DPI

DRAM

DVM

ECP

EDC

EEPROM

EMI

EP

CN

CON

CPU dB dBA dBM

DC

DCU

AP

AC

APC

ASIC

ASSY

BIOS

BLDC

CMOS

Explanation

Access Point

Alternating Current

Auto Power Control

Application Specific Integrated Circuit assembly

Basic Input Output System

Brush-less Direct Current

Complementary Metal Oxide Semiconductor connector connector

Central Processing Unit decibel decibel A decibel milliwatt direct current

Diagnostic Control Unit

Dot Per Inch

Dynamic Random Access Memory

Digital Voltmeter

Enhanced Capability Port

Embedded Diagnostic control

Electronically Erasable Programmable Read Only Memory

Electro Magnetic Interference electrophotographic

Enhanced Parallel Port

First Printout Time firmware graphics device interface ground

Host Based Printing

Hard Disk Drive

High temperature and high marshy place high voltage

High Voltage Power Supply interface

Input and Output integrated circuit

Intelligent Drive electronics or Imbedded Drive Electronics

11-2

Service Manual

Samsung Electronics

Reference Information

Acronyms and Abbreviations(2)

Abbreviations

PTL

PWM

Q-PID

Q ty

RAM

ROM

SCF

SMPS

OPC

OP

PBA

PCL

PDL

PPM

PPS

PS

SPGP

SPL

Spool

SW sync

USB

WECA

L/L

LSU

MB

MHz

MPF

NIC

N/N

NVRAM

IEEE

IPA

IPM

LAN lb

LBP

LCD

LED

Samsung Electronics

Explanation

Institute of Electrical and Electronics Engineers. Inc

Isopropy Alcohol

Images Per Minute local area network pound(s)

Laser Beam Printer

Liquid Crystal Display

Light Emitting Diode

Low temperature and low marshy place

Laser Scanning Unit megabyte megahertz

Multi Purpose Feeder

Network Interface Card

Normal temperature and normal marshy place nonvolatile random access memory

Organic Photo Conductor

Operation Panel Equipment

Printed Board Assembly

Printer Command Language , Printer Control Language

Page Discription Language

Page Per Minute

Pulse Per Second

Post Script

Pre-Transfer Lamp

Pulse Width Modulation

Quick Printer Initiating Device quantity

Random Access Memory

Read Only Memory

Second Cassette Feeder

Switching Mode Power Supply

Samsung Printer Graphic Processor

Samsung Printer Language

Simultaneous Peripheral Operation Online switch synchronous or synchronization

Universal Serial Bus

Wireless Ethernet Compatibility Alliance

Service Manual

11-3

Reference Information

11.3 Select a location for the printer

• Leave enough room to open the printer trays, covers, and allow for proper ventilation. (see diagram below)

• Provide the proper environment :

- A firm, level surface

- Away from the direct airflow of air conditioners, heaters, or ventilators

- Free of extreme fluctuations of temperature, sunlight, or humidity

- Clean, dry, and free of dust

11-4

Service Manual

Samsung Electronics

Reference Information

11.4 Sample Tests Patterns

The sample patterns shown below are the standard test patterns used in the factory.

The life of the toner cartridge, developer cartridge and printing speed are measured with the pattern shown below. The A4 ISO 19752 standard pattern samples are reproduced reduced to 70% of the actual A4 size.

Samsung Electronics

Service Manual

11-5

Reference Information

11.5 LAN (Optional Function)

• This product can be used with a wired LAN (Option)

• LED Condition and Status

Antenna connector

RJ-45 Jack

Active LED(Green)

Link LED

(Red/Green/Orange)

[LED STATUS]

LED Condition Status

Active LED random blink

Active LED regular blink

Normal NPC &Normal packet receive

Normal NPC &No Packet

Active LED Off/On maintenance NPC Initial inferiority

Link LED On The link LED On OPC,Normally linked

(Red:Wireless,Green:Wire,Orange:Wire)

Link LED Off Link LED off NPC,Link Inferiority

11-6

Service Manual

Samsung Electronics

ELECTRONICS

* This service manual is a property of Samsung Electronics Co., Ltd.

Any unauthorized use of Manual can be punished under applicable international and/or domestic law.

Samsung Electronics Co.,Ltd. Mar. 2006

Printed in Korea.

VERSION NO. : 1.00 CODE : JC-0168R

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