ML-1700 | Samsung ML-1750 Service manual

LASER PRINTER

ML-1700 Series

ML-1710

ML-1750

SERVICE Manual

LASER PRINTER CONTENTS

1.

Precautions

3.

Specifications

4.

Summary of product

5. Disassembly and Reassembly

7.

Troubleshooting

8.

Exploded Views and Parts List

9.

Block Diagram

10. Connection Diagram

ELECTRONICS

This service manual is also provided on the web, the ITSELF system f Samsung Electronics Co., Ltd.

http://itself.sec.samsung.co.kr

© Samsung Electronics Co.,Ltd. February 2003

Printed in Korea.

VERSION NO. : 1.00 CODE : JC-0093A

2003. 02

1

1. Precautions

The cautions in the below are items needed to keep in mind when maintaining and servicing.

Please read carefully and keep the contents in mind to prevent accidents while servicing and to prevent that the machine gets damage.

1.1 Warning for safety.

Precautions

(1) Request the service by qualified service person.

The service for this machine must be performed by a service person who took the additional education of this field.

It is dangerous if unqualified service person or user tries to fix the machine.

(2) Do not rebuild it discretionary.

Do not attach or change pats discretionary. Do not dissemble, fix, and rebuilt it. If do, printer will abnormally work and electric shock or a fire can be occurred.

(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, 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 precautions 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

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Precautions

1.2 Caution for safety

1.2.1 Precaution related noxious material

The toner in a printer cartridge contains a chemical material, which might harm human body if it is swallowed.

Please keep children out of the toner cartridge.

1.2.2 Precaution related electric shock or fire

It is possible to get electric shock or burn by fire if you don't fallow the instructions of the manual.

(1) Use exact voltage. Please do use an exact voltage and wall socket. If not, a fire or an electric leakage can be caused.

(2) Use authorized power code. Do use the power code supplied with PRINTER. A fire can be occurred when over current flows in the power code.

(3) Do not insert many codes in an outlet. If do, a fire can be occurred due to flow over current in an outlet.

(4) Do not put water or extraneous matter in the PRINTER. Please do not put water, other liquid, pin, clip, etc.

It can cause a fire, electric shock, or malfunction. If it is happened, turn off the power and remove the power plug from outlet immediately.

(5) Do not touch the power plug with wet hand. When servicing, do remove the power plug from outlet. And do not insert or take off it with wet hand. Electric shock can be occurred.

(6) Caution when inserting or taking off the power plug. The power plug has to be inserted completely. If not, a fire can be caused due to poor contact. When taking off the power plug, do grip the plug and take it off.

If grip the line and pull over, it could be damaged. A fire or electric shock could cause.

(7) Management of power code. Do not bend, twist, or bind it and place other materials on it. Also, do not fix it with staples. If the power code gets damage, a fire or electric shock can be caused. A damaged power code must be replaced immediately. Do not repair the damaged part and reuse it. A repaired part with plastic tape can be occurred a fire or electric shock. Do not spread chemicals on the power code. Do not spread insecticide on the power code. A fire or electric shock can be occurred due to thinner(weak) cover of the power code.

(8) Check whether the power outlet and the power plug are damaged, pressed, chopped, or blazing fire or not. When such inferiorities are found, repair it immediately. Do not make it pressed or chopped when moving the machine.

(9) Caution when thundering, and being flash of lightening. It causes a fire or electric shock. Take the power plug off when thundering. Do not touch cable and device when thundering and being flash of lightening.

(10) Do avoid the place where is moisture or has dust. Do not install the printer in where have lots of dust or around humidifier. A fire can be occurred. A plug part need to clean well with dried fabric to remove dust.

If water drops are dripped on the place covered with dust, a fire can be occurred.

(11) Avoid direct sunlight. Do not install the printer near to window where directly contacts to the sunlight. If the machine contacts sunlight long time, the machine cannot work properly because inner temperature of the machine is getting higher. A fire can be caused.

(12) Turn off the power and take off the plug when a smoke, strange smell, or sound from the machine. If you keep using it, a fire can be occurred.

(13) Do not insert steel or metal piece inside/outside of the machine. Do not put steel or metal piece into a ventilator. An electric shock could be happened.

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Precautions

1.2.3 Precaution related handling the machine.

If you ignore this information, you could get harm and machine could be damaged.

(1) Do not install it on the different levels, or slanted floor.

Please confirm whether it is balanced or not after installation. If it is unbalanced, an accident can be happened due to the machine fell over.

(2) Be careful not to insert a finger or hair in the rotating unit.

Be careful not to insert a finger of hair in the rotating unit (motor, fan, paper feeding part, etc) while the machine is operating. Once it happens, you could harm.

(3) Do not place a pot contains water/chemical or small metals. If those are got into the inner side of machine, a fire or electric shock can be occurred.

(4) Do not install it in where lots of moisture or dust exists or where raindrop reaches. A fire or electric shock can be caused.

(5) Do not place a candlelight, burning cigarette, and etc. on the machine. Do not install it near to heater. A fire can be occurred.

1.2.4 Precaution when assembly/disassembly

When replace parts, do it very carefully. Do memorize the location of each cable before replace parts for reconnecting it afterwards. Do memorize. Please perform the below before replace or disassembly the parts.

(1) Check the contents stored in the memory. All the information will be erased after replace main board. The information needed to keep has to be written down.

(2) Before servicing or replacing electric parts, take off a plug.

(3) Take off printer cables and power code connected to printer.

(4) Do use formal parts and same standardized goods when replacing parts.Must check the product name, part code, rated voltage, rated current, operating temperature, etc.

(5) Do not give an over-force when release or tighten up the plastic parts.

(6) Be careful not to drop the small parts such as screws in the printer.

(7) Be careful not to change the location of small parts such as screws when assembling and disassembling.

(8) Do remove dust or foreign matters completely to prevent fire of tracking, short, or etc.

(9) After finished repair, check the assembling state whether it is same as before the repair or not.


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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.

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R E F E R E N C E I N F O R M AT I O N

2

2. Reference Information

This chapter describes the reference information for applying this training manual, and it is consisted of the tool list, the abbreviation table, the outline of model, and so on.

2.1 Tool for Troubleshooting

The following tools are recommended for safe and smooth troubleshooting described in this service manual.

1

DCU(Diagnostic Control Unit)

Standard : Test equipment to diagnose the Laser printer supplied by Samsung Electronics.

4

Driver

Standard : "-" type, "+" type (M3 long, M3 short, M2 long,

M2 short).

5

Tweezers

Standard : For general home use, small type.

2

DVM(Digital Volt Meter)

Standard : Indicates more than 3 digits.

6

Cotton Swab

Standard : For general home use, for medical ser-vice

7

Cleaning Equipments a IPA(Isopropyl

Alcohol)dry cloth or a soft stuff neutral detergent

3

Electronic Scale

Standard : Equipment to check the weight of consumables(toner cartridge) supplied by Samsung

Electronics. (The gram unit can be measured.)

8

Software(Driver) installation CD ROM


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2.2 Acronyms and Abbreviations

The table in the below explains abbreviations used in this service manual.

The contents of this service manual are declared with abbreviations in many parts. Please refer to the table.

ASIC

ASSY

Application Specific Integrated Circuit assembly

BIOS Basic Input Output System

CMOS

Semiconductor

Complementary Metal Oxide

CN connector

CON connector

CPU Central Processing Unit dB decibel dbA decibelampere

DCU

DPI

DRAM

Diagnostic Control Unit

Dot Per Inch

Dynamic Random Access Memory

ECP Enhanced Capability Port

EEPROM Electronically Erasable Programmable

Read Only Memory

EMI Electro Magnetic Interference

EP

EPP electrophotographic

Enhanced Parallel Port

F/W firmware

GDI graphics device interface

GND ground

HBP Host Based Printing

HDD Hard Disk Drive

HVPS High Voltage Power Supply

I/F interface

I/O Input and Output

IDE Intelligent Drive electronics or Imbedded

Drive Electronics

IEEE Institute of Electrical and Electronics

Engineers. Inc

Isopropy Alcohol IPA

IPM

LAN

Images Per Minute local area network lb pound(s)

LBP Laser Beam Printer

LCD

LED

Liquid Crystal Display

Light Emitting Diode

LSU Laser Scanning Unit

MB megabyte

MHz megahertz

NVRAM nonvolatile random access memory

OPC

PBA

PCL

Organic Photo Conductor

Printed Board Assembly

Printer Command Language , Printer

Control Language

PDL

PPM

PTL

Q-PID

Page Discription Language

Page Per Minute

Pre-Transfer Lamp

Quick Printer Initiating Device

Q ty quantity

RAM Random Memory

ROM

SCF

SMPS

SPGP

Read Only Memory

Second Cassette Feeder

Switching Mode Power Supply

Samsung Printer Graphic Processor

SPL

Spool

Samsung Printer Language

Simultaneous Peripheral Operation Online

SW switch sync synchronous or synchronization

USB Universal Serial Bus

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2.3 The Sample Pattern for the Test

The sample pattern shown in below is the standard pattern used in a factory.

The contents of the life span and the printing speed are measured with the pattern shown in below.

(The picture in the manual is 70% size of the actual A4 size.)

2.3.1 A4 5% Pattern

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2.3.2 A4 2% Pattern

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2.3.3 A4 IDC Pattern


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Specifications

3

3. Specifications

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

3.1 General Specifications

ITEM DESCRIPTION

Print Technology Non-impact Electro-photograpic Printing

Developing system

Print Speed (1)

Resolution

Non-Magnetic, Mono-Component Developing System

16 PPM : A4 size , 5% Character pattern

17 PPM : Letter size , 5% Character pattern

ML-1710 : True 600 X 600 DPI

ML-1750 : 1200 X 600 DPI

Laser diode (LSU : Laser Scanner Unit)

Power-on boot : 30 seconds or less

Source of Light

Warm-Up Time

First Print Out Time

Media Size

Media Thickness

Dimension(W X D X H)

Weight

Acoustic Noise (1)

Power save mode

Toner save mode

Duty Cycle

Periodic Replacing Parts (2)

Less than 12 seconds (Ready to 1st page out)

75 X 125 (3” X 5”) mm to 216 X 356 (8.5” X 14”)mm

16 ~ 24 lb

352 (13.8

” ) X 372 (14.6

” ) X 196 (7.7

” ) mm

Net : 7 Kg /15.4 lb

Gross : 9.5 Kg (Max.)

Stand by : Less than 35 dB

Printing : Less than 50 dB

Available

Available

Monthly : 15,000 pages maximum

Pick Up Roller : 60,000 Sheets

Feed Roller : 60,000 Sheets

Transfer Roller : 60,000 Sheets

Fuser Assembly : 60,000 Sheets

(1) For measuring the printing speed, count the papers which outputted within one minute from when the second page starts to be printed. (A4, 5% character pattern standard)

(2) The life span of the consumption parts can be checked by printing the demo page or the system list.

(Refer to the 6.3 Receive the service information)


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Specifications

3.2 Controller Specification

ITEM

Processor(CPU)

OS Compatibility

Memory

Emulation

Interface

(1)

DESCRIPTION

ML-1710

Samsung Jupiter4 90MHz

Win 98x/ME/2000/XP,

Various Linux OS,Mac (Mac OS 8.6

↑

)

FLASH ROM(PROGRAM) : 0.5MB flash

ML-1750

Samsung SPGPm 166MHz

Win 9x/NT4.0/ME/2000/XP

Various Linux OS,Mac (Mac OS 8.6

↑

)

RAM : 8 MB

EEPROM(NVRAM) : 512 byte

SPL(Samsung Printer Language)

USB 1.1

- 12 Mbps 1 port

PCL6, IBMProPrinter, EPSON

USB

- USB 2.0

- 480 Mbps 1 port

Parallel : IEEE 1284

- Modes supported :

Compatible,Nibble,Byte,ECP

External Network Adaptor(Optional)

Interface switching

Interface time-out

Automatic

5min(Max.)

Font Windows Font 45 Scalable, 1 Bitmap

(1) The SPL series model is USB exclusive use, so it supports the environment beyond the WIN 98.

3.3 Electrical Specification

ITEM

Input Voltage

Power Consumption

Nominal input voltage

Input voltage range

Nominal frequency

Frequency tolerance

Printing : 280W Avg or less

DESCRIPTION

100~127VAC

90~132VAC

50/60 Hz

+3Hz

Power Save : 10W Avg or less

3-4 Environmental Range

ITEM

Temperature

Humidity

OPERATING

10~32 o C(50-90 oF)

20~80%RH

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STORAGE

-20~40 o C (-4~104 oF)

10~80%RH

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Specifications

3.5 TONER Cartridge (Developer)

ITEM

Life span

Developing

Charging

Toner checking sensor

Ozone

Style

DESCRIPTION

Starter: 1,000 sheets

Running : 3,000 sheets

Non-magnetic Mono Conponent Contact Developing

Conductive Roller Charging

Not Available

0.1PPM or less

Single cartridge

REMARK

IDC 5% pattern

8 hours

2-Paper Handling Specifications

Please refer to "Paper Specifications" on user guide

• Input Paper Size

PAPER

A4

Letter

Legal(Legal14")

JIS B5

Folio(Legal13")

DIMENSIONS

210 X 297 mm

216 X 279(8.5 X 11")

216 X 356(8.5 X14")

182 X257mm (7.2 X 10")

216 X 330mm (8.5 X 13")

WEIGHT

60 to 90 g/m 2 bond(16 to 24 lb)

Minimum size (Custom) 76 X 127mm (3 X 5")

Maximum size (Custom) 216 X 356mm (8.5 X 14")

Transparency(OHP)

Label paper

Same minimum and maximum sizes as listed above

60 to 163 g/m 2 bond(16 to 43 lb)

Thickness:

0.10 X 0.14 mm (0.0039 X 0.0055")

Envelopes

• Input capacity

Cassette: 250 sheets

Manual : 1 sheet

• Output capacity

Face Down : 50 sheets(20lb)

Face Up : 1 sheet(OHP, Lavbel, Cut Sheet, Envelope)

Up to 90 g/m 2 bond(16 to 24 lb)


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Specifications

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S U M M A RY OF PRO D U C T

4

4. Summary of Product

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

4.1 Printer Components

4.1.1 Front View

Top output tray

(Face down)

Control Panel

Output Support

Front Cover

Manual Feeder guide

Manual Feeder

Tray

Power switch

Paper level indicator


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4.1.2 Rear View

Rear output tray

(Face up)

4.1.3 Inside View

Power receptacle

Parallel port

(ML-1750 Only)

USB port

Toner cartridge

Front Cover

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4.1.3 Control Panel

1) On Line/Error and Toner Save LEDs

LED Description

If the On Line/Error lights green, the printer is ready to print.

If the On Line/Error lights red, the printer is experiencing an error, such as jammed paper, the open cover or the empty toner cartridge. If you press the Cancel button while the printer is receiving data, the On Line/Error LED blinks red to cancel printing.

In Manual Feed mode, if there is no paper in the Manual Feeder, the On Line/Error LED blinks red. Load paper into the Manual Feeder and the LED stops blinking.

If the printer is receiving data, the On Line/Error LED slowly blinks green.

If the printer is printing the received data, the On Line/Error LED blinks green fast.

If you press the Cancel button in Ready mode, this LED is on and the Toner Save mode is enabled.

If you press this button once again, this LED is off and the Toner Save mode is disabled.

If the On Line/Error and Toner Save LEDs blink, your system has some problems. To solve the problem.


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2) Cancel button

Printing demo page

Printing configuration sheet

Manual feeding

Cleaning inside printer

Canceling print job

Toner Save mode on/off

In Ready mode, press and hold this button for about 2 seconds until all LEDs blink slowly, and release.

In Ready mode, press and hold this button for about 6 seconds until all LEDs blink fast, and release.

Press this button each time you load a sheet of paper in the manual feeder, when you select Manual Feed for Source from your software application.

In Ready mode, press and hold this button for about 10 seconds until all LEDs turn on, and release. After cleaning the printer, one cleaning sheet prints.

Press this button during printing. The On Line/Error LED blinks while the print job is cleared from both the printer and the computer, and then return to Ready mode. This may take some time depending on the size of the print job.

In Manual Feed mode, you can’t cancel the print job by pressing this button.

In Ready mode, press this button to turn the Toner Save mode on or off.

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4.2 System Layout

3

4

1

2

Cassette

Manual Feeder

Transfer Roller

PTL(Per-Tramsfer-Lamp)

1

5

Fuser

PR

6

L S U

7

CR

OPC

3

TR

DR

SR

PTL

4

Toner Cartridge

FR

MP Sensor

P IC

K

/R

2

5

6

7

Fuser

LSU(Laser Scan Unit)

Toner Cartridge

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4.2.1 Feeding Part

There are the universal cassette, which loads papers, and the manual feeder, which supplies paper one by one. The cassette has the function pad which separates paper one by one, and it has the sensor function to check the existence of the loading paper.

- Feeding Method: Universal Cassette Type

- Feeding Standard: Center Loading

- Feeding Capacity: Cassette-250 sheets (75g/m©˜, 20lb paper standard)

Manual 1 sheet (Paper, OHP, Envelop, etc.)

- Paper detecting sensor: Photo sensor

- Paper size sensor: None

4.2.2 Transfer Ass’y

It is consisted of the PTL (pre-transfer lamp) and the Transfer Roller. The PTL sends a light to the OPC drum, makes the current on the drum surface to low, and improves the transfer efficiency.

The transfer roller delivers the toner of the OPC drum to the paper.

- The life span: Print over 60,000 sheets (in 15~30°C)

4.2.3 Driver Ass’y

It is a power delivery unit by gearing. By driving the motor, it supplies the power to the feeding unit, the fusing unit, and the distributing unit.

4.2.4 Fixing Part(Fuser)

- The fuser is consisted of the Heat Lamp, Heat Roller, Pressure Roller, Thermistor, and Thermostat. It adheres the toner to the paper with a pressure and a heat to complete the printing job.

- There are two methods, the existing method which use the Heat Lamp and the Q-PID which is developed by Samsung.

110V : Heat Lamp type Fuser

220V : Heat Lamp type or Q-PID type Fuser

4.2.4.1 Temperature-Intercepting Device (Thermostat)

The thermostat is the temperature-intercepting device, which cuts off the power for preventing an overheating or a fire when the heat lamp or the heat coil of the heat roller is overheated.

4.2.4.2 Temperature Detecting Sensor (Thermistor)

The Thermistor detects the surface temperature of the heat roller, and it maintains the regular temperature of the heat roller by responding to the information of the temperature.

4.2.4.3 Heat Roller

The heat roller transfers the temperature from the heat lamp or heat coil to the surface to heat the paper which passes the surface. The melted toner cannot stain the heat roller coated with Teflon.

The heating elements are heat lamp and heat coil. For this product, Q-PID method with the heat coil is applied.

4.2.4.4 Pressure roller

The pressure roller mounted right under the heat roller is made of the silicon resin, and the surface of the roller is coated with Teflon to fuse the toner on the paper when paper passes between the heat roller and the pressure roller.

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4.2.4.5 Safety Relevant Facts

• Protecting device when overheating

- 1st protecting device: H/W cuts off when detecting an overheating

- 2nd protecting device: S/W cuts off when detecting an overheating

- 3rd protecting device: Thermostat cuts off the power

• Safety device

- The power of the fuser is cut off when the front cover is open.

- The overheating safety device for customer

- Maintains the surface temperature of the Fuser Cover under 80°C and attach the caution label inside of the rear cover where customer can find easily.

4.2.5 LSU (Laser Scanner Unit)

The LSU unit is controlled by the video controller. It scans the video data received from video controller with laser beam by using the rotation principal of the polygon mirror to create the latent image on the OPC drum.

It is the core part of LBP.

The OPC drum rotates as the same speed as the paper feeding speed. It creates the /HS YNC signal and sends it to the engine when the laser bean of the LSU reaches the end of the polygon mirror, and the engine detects the /HS YNC signal to arrange the vertical line of the image on the paper. After detecting the /HS

YNC signal, the image data is sent to the LSU to arrange the its left margin on the paper.

The one side of the polygon mirror is one line for scanning.

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4.2.6 Toner Cartridge

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

- Developing Method: Non magnetic 1 element contacting method

- Toner: Non magnetic 1 element shatter type toner

- The life span of toner: 3,000 sheets (IDC Pattern/A4 standard)

- Toner remaining amount detecting sensor: None

- OPC Cleaning: Collect the toner by using electric static + FILM OPC

- Management of disusable toner: Collect the toner by using electric static (Clenerless Type- No disusable toner)

- OPC Drum protecting Shutter: None

- Classifying device for toner cartridge: ID is classified by interruption of the frame channel.

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4.3 Main PBA(SPL Model)

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, I/O handling, drivers, and PC interface. The main board sends the Current Image dlml 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.

ASIC

FLASH MEMORY

SDRAM BUFFER

VIDEO CLK

14.7456MHz

Main CLK

10MHz

OSC1

U33

U17

OSC2

CN2

CN1

USB PORT MOTOR Drive IC

U27 U16 U26 U32 U24 CN3

CN9

CN10

U13

CN6

U20 U31 CN5 U25 CN8 CN7


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4.3.1 ASIC (Jupiter IV)

The Jupiter IV (16Bit RISC Processor), which is the executive controller to operate the printer function, is in use, and the each operation block is driven by system program of the flash memory. The whole system is controlled by driving operation block.

•Main function block

• Completely Integrated System for Embedded Applications,

• 16 Bit Risc Architecture, Efficient and Powerful ARM7TDMI CPU

• LSU Interface Module for Interfacing PVC or HPVC with LSU

• 2 Channel General Purpose DMA Controller for High Speed I/O

• Dual Memory Bus Architecture

• Operating frequency : 80MHz

• Operating power : 3.3V

• Power on reset time : under 6.6ms

4.3.2 Flash Memory

It stores the system program and downloads the system program through the PC interface.

• Capacity : 0.5M Byte

• Access Time : 70 nsec

4.3.3 SDRAM

It is used as a swath buffer, system working memory area, etc. while printing.

• Capacity :

ML-1510

2 M byte

ML-1710

8 M byte

• Access Time : 60 nsec

ML-1750

8 M byte

4.3.4 Sensor input circuit

1) Paper Empty Sensing

The Paper empty sensor (Photo Interrupter) 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.

2) MP Sensing

By operation of Actuator on the frame, the MP Sensor (Photo Interrupter) 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.

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Samsung Electronics


3) Paper Feeding, 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 1 sec. after paper is fed, paper Jam0 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.

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, 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)

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, 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.

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

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

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, the resistance Rs value of sensing and the voltage value of the V reference can be changed by motor driving voltage value.


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Samsung Electronics


4.4 Main PBA (PCL Model)

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Samsung Electronics


U8 U6 CN2 U27 CN3 U7 CN4 OSC2 U3 U20 U10 U11 U24 U13 CN13

Processor

PC Interface

Emulation

OS Compatibility pcb

U1 U15 U25 U14 OSC5 CN8 OSC4 U17 U26 U18

ML-1710 (ML-1510)

Samsung Jupiter4 90MHz

USB 1.1

USB

SPL

(Samsung Printer Language)

Win 98/Me/2000/XP

Various Linux OS,

Mac (Mac OS 8.6

↑

)

FR-4, 2Layer

CN10 CN9 CN11

ML-1750

Samsung SPGPm 166MHz

USB 2.0

USB/IEEE1284 (Parallel)

SPL, PCL6,

IBM ProPrinter, EPSON

Win 9x/NT/4.0/Me/2000/XP

Various Linux OS,

Mac (Mac OS 8.6

↑

)

FR-4, 4Layer

U13

CN6

CN12


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Samsung Electronics


4.4.1 Asic(SPGPm)

1) ARM946ES

- 32-bit RISC embedded processor core

- 16KB instruction cache and 16KB data cache

- No Tightly Coupled Memory

- Memory Protection Unit & CP15 control program

2) Dual bus architecture for bus traffic distribution

- AMBA High performance Bus (AHB)

- System Bus with SDRAM

3) IEEE1284 compliant parallel port interface

4) Printer Video Controller for LBP engines

5) Graphic Execution Unit for Banding support of Printer Languages

6) Printer Video Controller for LBP engines

- PVC : Printer Video Controller without RET Algorithm

- HPVC : Printer Video Controller with RET algorithm

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

7) Engine Controller

- Motor Control Unit

- Motor Speed Lookup Table Memory (128 x 16 x 2)

- Pulse Width Modulation Unit

- 4 Channels are supported

- ADC Interface Unit

- 3 ADC Channels are available

- ADC Core (ADC8MUX8) maximum clock frequency : 3 MHz

8) USB 2.0 Interface

9) Package

: 272 pins PBGA

10) Power

: 1.8V(Core), 3.3V(IO) power operation

11) Speed

: 166MHz core(ARM946ES) operation, 60MHz bus operation

4.4.2 Memory

1) Flash Memory

- It stores the System Program, downloads the System program through PC Interface, and compresses the

PCL font, then stores it.

- Capacity : 2M Byte

- Access Time : 70 nsec

2) DRAM

- It is used as Swath buffer, System working memory area, etc. when printing. It stores the font list, compressed into flash memory, on DRAM and uses it as PCL font.

- Capacity : 8M Byte (Basic), upto 64M Byte (Factory Option)

- Type : SDRAM 100MHz/133MHz , 16bit

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Samsung Electronics


4.4.4 SPGPm Internal Block Diagram

EXTERNAL

DMA CONTROLLER

(4CH)

ROM

CONTROLLER

ADDR/

DATA

MUX

IO

CONTROLLER

SFR BUS

INTERFACE

ARM946E -S CORE

16KB ICACHE

16KB DCACHE

AHB BUS

MAC

SYSMAC

PVC

HPVC

512x8

4096x16

UART(3CH)

ENGINE

CONTROLLER

LSU I/F

PULSE WIDTH

MODULATOR

MOT OR

CONTROLLER

128x16 x2

ADC (3CH)

SYSTEM BUS

ARBITER

SYSTEM

BUS

INTERFACE

USB2.0

DECODER

CLOCK & RESET

GENERATOR

SYSTEM PLL

(120MHz)

SDRAM

CONTROLLER

(5CH)

HCT gCODEC

ARBITER

PARALLEL PORT

INTERFACE

MISC

CONTROLLER

EPI

ENGINE

Comm. I/F

INTERRUPT

CTRL (5CH)

TIME CONTROL

UNIT

GRAPHIC

EXECUTION

UNIT

ROTATOR/

SCALER/

HALFTONER

1024x8, 256x8x 4


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Samsung Electronics


4.5 SMPS & HVPS

The SMPS supplies the DC power to the system.

It takes 110V/220V and outputs the +3.3V, +5V and +24V to supply the power to the main board and ADF board.

The HVPS part creates the high voltage of THV/MHV/Supply/Dev and supplies it to the developer part for making the best condition to display the image. The HVPS part takes the 24V and outputs the high voltage for THV/MHV/BIAS, and the outputted high voltage is supplied to the toner, OPC cartridge, and transfer roller.

F1

110V : 125V/8A

220V : 250V T 5A H

CN1

(H/L CON.)

F2

110V : 125V/3A

220V : 250V 2A H

CN3

(FAN CON.)

CN4

(PANEL CON.)

MHV OPC

THV

DEV

SUPPLY

COVER OPEN SWITCH

MANUAL SENSOR

FEED SENSOR

PAPER-EMPTY SENSOR

EXIT SENSOR MAIN PBA CON.

F101

250V L2A

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Samsung Electronics


4.5.1 HVPS(High Voltage Power Supply)

1) Transfer High Voltage (THV+)

- Function: It is a voltage to transfer a toner developed on OPC drum to a paper.

- Output voltage: Maximum +5.0KV ±5% (Duty changeable, unload)

- 1.0KV ±15%(When cleaning, 200MOhm)

- Error: If THV (+) doesn't output, a ghost status (same character is printed after one cycle (76mm) of OPC) with a low density occurs due to a toner on OPC drum cannot normally transfer to a paper.

2) Charge Voltage (MHV)

- Function: It is a voltage to charge entire surface of OPC with -900V ~ -1000V.

- Output voltage: -1.3KV ~ 1.8KV DC ±50V

- Error: If MHV doesn't output, a black paper is printed out because toner on developing roller moves to OPC drum due to the surface of OPC is not charged.

3)Cleaning Voltage (THV-)

- Function: It removes a dirty on a surface by sending a minus toner in a transfer roller to an OPC drum to recover toners.

- Output Voltage: There is no feedback control, so change range of output is big up to load.

- Error: Toner contamination occurs at a backside of a printed-paper.

4) Developing Voltage (DEV)

- Function: It is a voltage to develop a toner with using a difference of electronic potential on an exposed part by LSU (Laser Scanning Unit).

* Generally, the electronic potential of exposed OPC is -180V and exposed developer is -350V when printing, so toner with minus (-) is developed on an exposed part.

- Output voltage: -200V ~ 600V DC ±20V

- Error: 1. If DEV is GND, a density is going significantly down.

2. If DEV is floating due to instable contacting point of terminal, and etc., a density is significantly going up.

5) Supply Voltage(SUP)

- Function: It is a voltage to supply toner to a developing roller.

- Output voltage: : -400V ~ 800V DC °æ 50V(Use ZENER, DEV gear)

- Error: 1. If SUP is GND, a density is dramatically going down.

2. If SUP is floating due to instable contacting point of terminal, and etc., a density is significantly going down as much as it cannot be recognized with eyes.


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Samsung Electronics


4.5.2 SMPS(Switching Mode Power Supply)

It is the power source for the whole system. It is 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 SMPS part, which supplies the DC power for driving the system, and the AC heater control part, which supplies the power to fuser. SMPS has three outputting channels (3.3V, +5V and +24V).

There are three kinds of power, 120V exclusive (America), 220V exclusive (Europe), and 220V for china

(nations with instable power supply).

3

6

7

4

5

8

9

1) AC Input

- Inputting rated voltage : AC 220V ~ 240V AC 120V / AC 220V

- Inputting voltage fluctuating range : AC 198V ~ 264V AC 90V ~ 135V / AC 198V ~ 264V

- Rated frequency : 50/60 Hz

- Frequency fluctuating range : 47 ~ 63 Hz

- Inputting voltage : Under 4.0Arms/2.0Arms

(The state when lamp is off or rated voltage is inputted/outputted)

2) Rated Power Output

NO Item

1 Channel name

2 CONNECTOR PIN

Rated outputting voltage

Maximum outputting voltage

Peak loading voltage

Ripple noise voltage

Maximum output

Peak output

Uses

CH1

+3.3V

CON 3

3.3V PIN: 3, 4

GND PIN: 5, 6

3.3V ± 5%

(3.2 ~ 3.4V)

1.0 A

1.5 A

100mVp-p

3.3W

4.95W

Logic part

CH2

+5V

CON3

5V PIN : 8

GND PIN: 7

+5V ± 5%

(4.75 ~ 5.25V)

0.14A

0.14A

100mVp-p

0.35W

0.7W

LSU LD

CH3

+24.0V

CON 3

24V PIN: 11, 12, 13

GND : 9. 10

+24V ± 10%

(21.6 ~ 26.4V)

2.0 A

2.0 A

500mVp-p

48W

60W

Main Motor

HVPS

Solenoid

Fan

Remark

1ms

1ms

3) Consumption Power

NO Item

1

2

3

Stand-By

PRINTING

Sleep-Mode

CH1

(+3.3V)

1.0 A

1.0 A

0.8A

CH2

(+5V)

0.07A

0.14A

0.01A

CH3

(+24V)

0.4 A

2.0 A

0.4A

System

AVG : 55 Wh

AVG : 250 Wh

AVG : 10 Wh

4) Length of Power Cord :

1830 ± 50mm

5) Power Switch :

Use

4-18

Training Manual

Samsung Electronics


6) Feature

- Insulating resistance : over 50M

Ω

(at DC500V)

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

- Leaking voltage : under 3.5mA

- Running voltage : under 40A peak (at 25°c, Cold start) Under 60A peak (in other conditions)

- Rising Time : Within 2Sec

- Falling Time : Over 20ms

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

7) Environment Condition

- Operating temperature range : 0°c ~ 40°c

- Maintaining temperature range : -25°c ~ 85°c

- Maintaining humid range : 30% ~ 90% RH

- Operating atmospheric pressure range : 1

8) EMI Requirement :

CISPR ,FCC, CE, MIC, C-Tick,

9) Safty Requrement

- IEC950 UL1950, CSA950, C-UL,NOM,TUV,Semko,Nemko,iK,CB, CCC(CCIB),GOST, EPA,

4.5.3 Fuser AC Power Control

Fuser (HEAT LAMP) gets heat from AC power. The AC 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 the 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 blinking 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.

1) Triac (THY1) feature

- 12A,600V SWITCHING

2) Phototriac Coupler (PC3)

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

- High Repetive Peak Off State Voltage : Min 600V


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Samsung Electronics


4.6 Engine F/W

4.6.1 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. (Refer to the [6.2 Paper Transfer rout])

4.6.1.1 Jam 0

• After picking up, paper cannot entered due to paper didn’t feed.

• 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, repack up. After repacking 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.

4.6.1.2 Jam 1

• After the leading edge of the paper passes the feed sensor, the tailing edge of the paper cannot pass the feed sensor after 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.

4.6.1.3 Jam 2

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

4.6.2 Drive

By gearing, the main motor drives the rollers such as feeding roller, developing roller, fuser roller, and distributing roller. The step motor is controlled for the sections, acceleration section and fixed speed section.

In the initial stage of the motor run, appoint the acceleration section to prevent the isolation of the motor. It is controlled by the A3977 motor driver IC. The step signal and the enable signal are sent to make the phase for driving the motor in CPU.

4.6.3 Transfer

The charging voltage, developing voltage and the transfer voltage are controller 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.

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Samsung Electronics


4.6.4 Fusing

The temperature change of the heat roller’s 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 controlled by comparing the target temperature to the value from the thermistor. If the value from the thermistor is out of the controlling range while controlling the fusing, the error stated in the table occurs. (For the domestic model, the Q-PID method has been applied.)

4.6.4.1 Heat Lamp Method

Error

Open heat error

Description

When warming up, it has been lower than 68°C over 28 seconds

Lower heat error

DCU LED Displat

60 All LED are blinking.

62 All LED are blinking

Over heat error

• Standby:

It has been lower than 80°C over 10 seconds

• Printing:

- 2 consecutive pages: it has been lower than

145°C over 4 seconds.

- 3 consecutive page; it has been 25°C lower than the fixed fusing temperature over 4 seconds.

It have been higher than 220°C over 3 seconds 68 All LED are blinking

4.6.4.2 Q-PID Method

Error

Open heat error

Lower heat error

Over heat error

Description

When preheating, it has been lower than 68°C over 15 seconds.

• After finishing the preheating stage, it has not reached 100°C (preheating stop temperature) during 15 seconds since the temperature is over 68°C.

• Printing

1) When the main motor is on and after 0.92 second, it has not reached the 160°C during 20 seconds.

2) From the 2 consecutive pages, it has been

20°C lower than the fusing temperature over 4 seconds.

• the error is not displayed immediately when it has been over 220°C over 3 seconds.

The temperature after the 3 seconds is checked.

If it is over 240°C, it is error.

• If the temperature has been higher than 220°C over 25 seconds, it is an error even through the temperature doesn’t reach 240°C.

DCU LED Displat





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Samsung Electronics


4.6.4.3 What is the Q-PID Method?

The Q-PID is developed by Samsung, and it saves the preheating time in half in comparison with the existed method. It saves not only the printing time for initial print but also it saves the printing speed for the reattempting print after for a while.

Toner

Air Layer

Holgen Lamp

Paper

Pressure Roller

• After heating the air layer, transfer the heat to the surface

• It takes long time to heat it until it reaches the proper temperature.

• The high temperature is needed when it is standby status.

Toner

Heat Pipe

Heating Wire

Paper

Pressure Roller

• The heat conductivity of the heat pipe is

100~150 times higher than cooper’s.

• It is possible to raise the temperature in an instant

• It saves the dissipation of power in the standby status due to high accumulation of heat.

4.6.5 LSU

The LSU is consisted of the LD (Laser Diode) and the polygon motor control. When the printing signal occurs, it turns the LD and drives the polygon motor. When the receiving light part detects the beam, Hsync occurs.

When the polygon motor speed becomes a normal, LReady occurs. If two conditions are satisfied, the status bit of the LSU controller register becomes 1 to be judged that the LSU is ready. If two conditions are not satisfied, the error shown in below occurs.

Error

Polygon motor error

DCU

When the polygon motor’s speed doesn’t 95 become a normal

Description

Hsync error The polygon motor’s speed is normal, but the Hsync signal is not created.

96

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Samsung Electronics

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

Releasing Plastic Latches

proximity of cables to moving parts makes proper

Many of the parts are held in place with plastic routing a must. 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 toner 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.


5-1

Samsung Electronics


5.2 Top Cover

1. Pull the Cassette out of the printer.

Cassette

4. Unlatch the front ends of the Top Cover.

2. Remove the Front Cover in the direction of arrow.

Front Cover

5. Remove the Top Cover in the direction of arrow.

Top Cover

3. Remove four screws.

6. Remove the Rear Cover from the Top Cover.

Rear Cover

5-2


Samsung Electronics


5.3 Fuser

5.3.1 Fuser(Heat Lamp Type)

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

- Top Cover(see page 5-2)

2. Unplug two connectors(Block) from the boards, then remove four screws.

5. Remove one screw and take the Idle Gear out.

Idle Gear

Fuser Ass'y

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

Thermostat

6. Remove four screws and divide the Fuser into two parts

Fuser Cover

4. Remove two screws and take the Halogen

Lamp out of the Heat Roller.

Heat Roller

7. Remove the Thermister from the Fuser Cover.

Halogen Lamp

Samsung Electronics

Thermister


5-3


5.3.2 Fuser(Q-PID Type)



2. Unplug two connectors(Block) from the boards, then remove four screws.

4. Remove two screws.

Fuser Ass’y

5. Remove one screw and take the Idle Gear out.

Idle Gear

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

Thermostat

5-4


Samsung Electronics


6. Separate Heat Roller Ass'y after remove six screws and after removing 6 screws as shown in below, take out the heat roller assembly in direction of the arrow while pulling the both side of the unit-brush

7. Unplug Thermister Harness from the Fuser cover.

Thermister Harness

Fuser Cover

Unit-Brush

Heat Roller

Caution : • Be careful not to damage or contaminate the surface of the roller when assembling/disassembling the heat roller.

• Additional state: Be careful especially not to damage the covering of the fusing assembly.

(If the cover is damaged, it could cause an electric leakage.)

8. Remove one screw and separate Thermister from the inter connector Fuser Cover.

Thermister


5-5

Samsung Electronics


5.4 Exit Roller



2.Remove the Exit Gear, Bearing and Exit Roller as shown below

2

1

Exit Gear

Bearing

Exit Roller

5.5 LSU



2. Remove two screws and unplug one connector from the Frame.

4. Unplug two connector from the LSU

3. Remove the LED PBA Ass’y as shown below.

LED PBA Cover

5. Unplug four screws and take the LSU out.

LSU

5-6


Samsung Electronics


5.6 Fan



2. Unplug the connector from the SMPS and remove the one screw. Then take out the Fan.

DC Fan

5.7 Driver Ass’y



2. Remove the six screws from the Drive Ass’y.

3. Unplug one connector from the Driver Ass’y

Drive Ass'y

Samsung Electronics


5-7


5.8 Engine Shield Ass’y



- Fuser Connector(see page 5-3)

2. Remove the fourteen screws securing from the

Engine Shield Ass’y and unplug the all connectors. Then take the Engine Shield Ass’y.

Engine Shield

Ass'y

5.9 Main PBA



- Engine Shield Ass’y(see page 5-8)

2. Unplug one connector and remove five screws from the Main PBA. Then lift the Main PBA out, as shown below.

Main PBA

5-8


Samsung Electronics


5.10 SMPS




2. Unplug one connector and remove three screws then take the Inlet Ass’y out.

Inlet Bracket

3. Remove one screw and unplug one connector from the Main PBA.

4. Remove three screws and take The SMPS out.

SMPS

Samsung Electronics


5-9


5.11 Transfer Roller



- LSU(see page 5-6)

2. Remove three screws and take the Transfer

Earth out.

Transfer

Earth

3. Unplug the PTL Holder Connector, then remove the PTL Holder and PTL Lens, as shown below.

PTL

Holder

PTL

Lens

4. Unlatch the Bush and remove it. Then lift the

Transfer Roller out, as shown below.

Transfer

Roller

Bush

5-10


Samsung Electronics


5.12 Feed Roller



- Drive Ass’y(see page 5-7)

2. Remove two screws from the Guide Paper and take it out.

Guide paper

5. Remove the Idle Gear and Feed Gear2.

Feed Gear2

Idle Gear

6. Remove the Feed Gear 1 Ass’y, as shown below.

3. Pull up the Feed Idle Bush and Feed Idle Shaft, as shown below.

Feed Idle

Shaft

Bush

Feed Gear1

Ass'y

4. Remove three screws from the Feed Bracket and take it out.

Feed Bracket

7. Remove the Feed Roller and Feed Roller 1, as shown below.

Feed Roller

Feed Roller1


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Samsung Electronics


5.13 Pick Up Roller & Solenoid



- Drive Ass’y(see page 5-7)


2. Remove three screws from the Feed Bracket and take it out.

4. Remove the Pick up Ass’y, as shown below.

Feed Bracket

1

2

Bush

Pick up Ass'y

5. Remove two screw then remove The Manual

Solenoid and Pick Up Solenoid.

3. Remove the Pick up Gear Ass’y, as shown below.

Pick up Gear

Ass'y

(Pick up)

Solenoid

(Manual)

Solenoid

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Samsung Electronics

ALIGNMENT & A D J U S T M E N T S

6

6. Alignment and 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.

6.1 How to use DCU

6.1.1 DCU Setup

You can examine the malfunction of the printer. To perform DCU, open the front discharge cover and leave the connect the harness wire(10 pin/4 pin) to the CN3(ML-1750) or CN2(ML-1710/1510) of the Main control board.

STATUS

ML SERIES DIAGNOSTIC CONTROL UNIT

04

05

07

08

09

10

DEV 300

LSU READY

PAPER EMPTY

COVER OPEN

COER HEATING

DEV 350

LSU MT & LD

DEV 350

LSU MOTOR

PAPER WIDTH

EXIT SENSOR

NEW CRU

FEED SENSOR

PRINTING TEMP READY HEAT

SELF

TEST

DIAGNOSTIC

05

06

07

08

09

10

11

00

01

02

03

04

12

13

14

DIAGNOSTIC CODE

MAIN MOTOR OPERATING SYSTEM

MAIN HIGH-VOLTAGE ON

TRNSFER HIGH-VOLTAGE (-)ON

THV(+) REFERANCE VOLTAGE

DEV/SUPPLY HIGH-VOLTAGE ON/PTL ON

LSU OPERATING SYSTEM

PICKUP CLUTCH ON

PEEMPTY/PWITH/NEW CRU TEST

FEED & EXIT SENSOR TEST

COVER OPEN SENSOR TEST

FUSER TEST

HOT BURN TEST

CLEAN MODE PRINT

THV(+)TRIGGER, ALL HV & FAN ON

THV(+) REFERENCE ON

ON OFF

61

STATUS CODE

WARM UP

00

01

02

03

04

READY (REGAL)

READY (LETTER)

READY (A4)

READY (EXECUTIVE)

READY (B5)

20

30

40

50

PRINT START

FEED SENSOR ON

FEED SENSOR OFF

PAPER OUT

69 SLEEP MODE

ERROR STATUS CODE

60

62

68

64

70

71

72

73

95

OPEN FUSER ERROR

LOW TEMPERATURE ERROR

OVER HEATING ERROR

COVER OPEN ERROR

NO PAPERR

PAPER JAM 0

PAPER JAM 1

PAPER JAM 2

LSU NOT READY

DIAGNOSTIC

MODE

DOWN

UP

SHIFT STOP

ENTER

TO ENTER DIAGNOSTIC MODE, PUSH THREE BUTTONS SIMUL ANEOUSL

AND TURN THE PRINTER POWER ON.


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Samsung Electronics


20, 21, 22 Print Start

30

40

50

69

6.1.2 Code

Connect DCU to the printer and turn the power on. It show 7 Segment FND on the panel and each code tells the function of the printer.

1) Normal Code

While printing or warming up, it indicate the position of the paper

Code

61

00~05

State

Warm up

Ready(kind of paper)

Feed Sensor On

Feed Sensor off

Paper Out

Sleep Mode

Description

The printer is on, the cover is open or close.

The printer is ready, the paper is detected when the first paper is printed.

00: Legal ,01: Letter ,02: A4 ,03: EXEC ,04: B5 ,05: Folio, 06: A5/A6

The engine controller received the print order from the video controller.

20: 1st, 21: MP, 22: SCF

The paper is passing out of the Feed Sensor.

The paper has passed out of the Feed Sensor.

The paper has passed out of Exit Sensor.

The fuser power turned off to minimize the power consumption.

2) Error Code

When detecting the malfunction, the printing is stopped to indicate error code.

Code State Description

64

65

70

71

72

60, 62, 68

73

76

95

Fuser Error The error in the fuser occurred. There is a short circuit in the thermistor and the thermostat while printing, Low Temperature Error occurs.

• 60: Open Fuser Error

• 62: Low Heat Error

• 68: Over Heat Error

The Printer Cover is open.

The Toner Cartridge not installed,

Cover Open

CRU Error

No Paper

Paper Jam 0

Paper Jam 1

No paper in the paper cassette.

The front part of paper is jammed between pickup unit and Feed sensor.

The front part of paper is jammed between the Discharge sensor and

Feed sensor.

Paper Jam 2 The front part of paper is jammed just after passing through the discharge sensor.

Out Bin Full The Out bin is filled with paper.

LSU Not Ready LSU Scanner Motor not ready or Hsync signal not output.

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6.1.3 Self Diagnostic Mode

If Error code occurs due to malfunction of the printer, perform Self Diagnostic Mode to solve the problem.

The printer works only in the self-test mode to solve the malfunction problem.

To enter the self-test mode, turn the power on pressing the buttons of [Down], [Shift] and [Stop] at the same time.

Release the button within 2 or 3 seconds if 78 shows in the DCU. If 00 shows in the DCU, press the button

[Up] or [Shift] to select the self+test , and press the button of [Enter] to operate. To stop, press the button of

[shift] and [Enter] together.

Description Code

00 Main Motor Operating System

Only the main motor is in operation.

01 Main High Voltage On(THV-)

-1400 voltage output by MHV terminal.

Caution : High voltage probe should be used.

02

03

04

05

06

Transfer High Voltage(-)On(THV-)

-1000 voltage output by MHV terminal.

Caution : High voltage probe should be used.

Transfer High Voltage (+)Reference on (THV +)

+800 voltage output by MHV terminal.


DEV/supply High Voltage : DEV/Supply High Voltage Test.

The left one of the three LEDs in the self-test panel is on when DEV high voltage Supply high voltage output by each HV terminal(-500V). Press the [Up] button to switch the voltage. The middle and right one of the three LEDs are on and -650 voltage output by DEV

HV terminal.


LSU Operating System

The scanning motor of LSU is in operation, the right LED of the three buttons on. Press the [Up] button to Check LD. LD is functioning and the middle button is on. If the LD is normal, all LEDs are on.

Pickup clutch on

The Solenoid in the printer is in operation. To stop the operation, Press the button [shift] and [Enter] together.


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11

12

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10

11

12

13

14

15

16

No.

00

01

02

03

04

05

06

07

08

09

17

Functi on

Motor

MHV

THV(-)

THV(+)

DEV

Enter

Motor Run

Mhv On

Thv Negative On

Thv On

Dev On

Up/ Down Stop

Motor Stop

Mhv Off

Thv Negative Off

Thv Off

Dev Off

Supply

0 : -630V

DEV

0 : -430V

LSU LSU Run

Pickup On

On Off Ready

Pic kUp

PEmpty

Paper Empty

Sensor

Ex it

Cover

Cover Open

Fus er

HotBur n

Clean Print

Thv

Refer ence

PTL

FAN

Manual

Pic kUp

Manual

Sensor

Fuser On

HotBurn On

Clean Printing

PTL On

Fan On

Manual Pickup On low adequate

Manual Sensor

Feed high

LSU Stop

Pickup Off

Fuser Off

PTL Off

Fan Off

Manual Pickup Off

Remar k

-1550V

+1300V

6.1.4 Self Test Button

If the Self-Test button pressed, vertical lines are printed.

Turn the power on while pressing this button, '89' shows in the DCU and the printer is warming up. After warming-up the printer is in READY Mode, and '88' shows in the DCU. In this mode, without any detection, the printer begins printing(trial printing and data from the PC). It is convenient to use this mode when the engine malfunction is detected in the control board.


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Samsung Electronics


6.2 Paper Path

4

Fuser

7

PR

3

L S U

5

CR

OPC

TR

Toner Cartridge

DR

SR

PTL

Feed

Sensor

P IC

K

/R

FR

6

MP Sensor

2

1

1

2

3

4

Paper Input (Cassette)

Paper Input (Manual Feeder)

Paper Out(Face Down)

Paper Out(Face Up)

5

6

7

Paper Empty Sensor

Paper Feeding Sensor

Paper Exit Sensor

Fuser

EXIT

Sensor

PR

L S U

CR

OPC

TR

Toner Cartridge

DR

SR

PTL

Feed

Sensor FR

MP Sensor

P I

C

K

/R

Empty Sensor

Fuser

EXIT

Sensor

PR

L S U

CR

OPC

TR

Toner Cartridge

DR

SR

PTL

Feed

Sensor FR

MP Sensor

K

/R

Empty Sensor

Fuser

EXIT

Sensor

PR

L S U

CR

OPC

TR

Toner Cartridge

DR

SR

PTL

Feed

Sensor

FR

MP Sensor

K

/R

Empty Sensor

<Jam0> <Jam1> <Jam2>

1) After taking order, the printer feeds the printing paper from the cassette or manual feeder.

2) The fad paper passes the paper feeding sensor. (Jam 0 occurs if the sensor is not operated after certain time passes)

3) The paper passed the paper feeding sensor moves to the paper exit sensor via printing process. (Jam 1 occurs if the sensor is not operated after certain time passes)

4) The paper passed the paper exit sensor moves out from the set. (Jam 2 occurs sometime after if the tailing edge of the paper is not coming out from the set after the leading edge of paper passes the paper exit sensor.)

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6.3 Clearing Paper Jams

Occasionally, paper can be jammed during a print job. Some of causes include:

• The tray is loaded improperly or overfilled.

• The tray has been pulled out during a print job.

• The front cover has been opened during a print job.

• Paper that does not meet paper specifications has been used.

• Paper that is outside of the supported size range has been used.

If a paper jam occurs, the On Line/Error LED on the control panel lights red. Find and remove the jammed paper. If it is invisible, look inside the printer.

Do not use a pinset or a sharp metal tool when removing a jam.

The covering of a metal part can be removed which can cause an electric leakage.

6.3.1 In the Paper Exit Area (JAM2)

1) If the paper jams as it exits to the output tray and a long portion of the paper is visible, pull the paper straight out.

3) Loosen the paper if it is caught in the feed rollers.

Then pull the paper gently out.

When you pull the jammed paper, if there is resistance and the paper does not move immediately, stop pulling. Continue with the next step.

2) Open the rear output tray.

Note: Please be careful when you open the rear cover.

The inside of the printer is still hot.

4) Close the rear output tray. Open and close the front cover. Printing can be resumed.


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1) Slide out the tray to expose the jammed paper.

2) Remove any missfeed paper by pulling it out by the visible edge from the tray. Make sure that all of the paper is properly aligned in the tray.

3) Slide the tray back into the printer. Open and close the front cover. Printing can be resumed.

6.3.3 Around the Toner Cartridge (JAM1)

1) Open the front cover and remove the toner cartridge 2) Gently pull the paper toward you.

6-8


3) Check that there is no other paper in the printer.

4) Reinstall the toner cartridge, and then close the cover.

Printing can be resumed.

Samsung Electronics


6.3.4 Tips for Avoiding Paper Jams

By selecting the correct paper types, most paper jams can be avoided. If a paper jam occurs, follow the steps outlined in

• Ensure that the adjustable guides are positioned correctly.

• Do not overload the tray. Ensure that the paper is below the paper capacity mark on the right inside of the tray.

• Do not remove the paper from the tray while printing.

• Flex, fan and straighten the paper before loading.

• Do not use creased, damp or highly curled paper.

• Do not mix paper types in the input tray.

• Use only recommended print media.

• Ensure that the recommended print side is facing down when loading paper into the input tray.

Samsung Electronics


6-9


6.4 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.

6.4.1 Printing a Demo Page

Print a demo page or a configuration sheet to make sure that the printer is operating correctly.

1) Hold down the Cancel button for about 2 seconds to print a demo page.

Hold down the Cancel button for about 6 seconds to print a configuration sheet.

2) The Demo page or the configuration sheet shows the printer’s current configuration.

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<Demo Page : ML-1710> <Demo Page : ML-1750>

Samsung Electronics


<System Data List : PCL Model Only>

6.4.2 Printing a cleaning sheet

If you are experiencing blurred, faded or smeared printouts. Printing a cleaning sheet cleans the drum inside the toner cartridge. This process will produce a page with toner debris, which should be discarded.

1) Ensure that the printer is turned on and in the Ready mode with paper loaded in the tray.

2) Press and hold down the Cancel button on the control panel for about 10 seconds.

3) Your printer automatically picks up a sheet of paper from the tray and prints out a cleaning sheet with dust or toner particles on it.

Note:

The cartridge cleaning process takes some time. To stop printing, turn the power off.


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6.5 Consumables and Replacement Parts

The cycle period outlined below is a general guideline for maintenance.

The example list is for an average usage of 50 transmitted and received documents per day.

Environmental conditions and actual use will vary these factors.

The cycle period given below is for reference only.

COMPONENT REPLACEMENT CYCLE

Pick-up Roller

Paepr Feeding Roller(Friction Pad)

Transfer Roller

Fuser

Toner Cartridge

60,000 Pages

60,000 Pages

60,000 Pages

60,000 Pages

3,000 Pages

6.6 The LED Status Display by Each Error

ERROR

Open Fuser Error

Over Heat Error

Low Heat Error

LSU not Ready Error

(Pmotor Error)

LSU Not Ready Error

(HSYNC Error)

LED Status

The [Error] LED (red) and the [Toner Save] LED are simultaneously flashing every one-second.

The [Error] LED (orange) and the [Toner Save] LED are simultaneously flashing every one-second.

The [Error] LED (red) and the [Toner Save] LED are simultaneously flashing every 4 seconds.

The [Error] LED (green) and the [Toner Save] LED are simultaneously flashing every one-second.

The printing is stop in the fad status, and the [Error] LED (green) and the [Toner Save] LED are simultaneously flashing every 4 seconds.

DCU CODE

60

68

62

95

96

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6.7 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

75.5mm

37.7mm

37.0mm

35.3mm

45.3mm

64.1mm

75.5mm

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

Black spot and image ghost black spot on the backside

Fuser

6

7

Fuser

PR

L S U

CR

OPC

DR

SR

PTL

TR

Toner Cartridge

FR

MP Sensor

P IC

K

/R 3

4

1

2

L S U

2

1

5

4

3

PTL

Toner Cartridge

MP Sensor

OPC Drum

Charge Roller

Supply Roller

Developing Roller

<Rollers Layout>

5

6

7

Tramsfer Roller

Heat Roller

Pressure Roller


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T RO U B L E S H O OT I N G

7

7. Troubleshooting

7.1 Bad image

7.1.1 Vertical Black Line and Band

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

• Description

2. Dark black vertical band occur in the printing.

Check and Cause

1. Damaged develop roller in the Developer.

Deformed Doctor-blade or cleaningblade.

Solution

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

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2. Scratched surface of the discharge roller in the developer.

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

2. Replace the transfer roller if occurred as

No. 3.

7.1.2 Vertical White Line

• Description White vertical voids in the image.

Digital Printer

Digital Printer

Digital Printer

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Check and Cause

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

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. Foreign matter in the LSU : Open the cover of LSU and clean with a cotton swab on the surface of the reflex mirror.

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

(In case the life of the developer 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 developer frame.

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

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

(Developer 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 developer cartridge.


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7.1.3 Horizontal Black Band

• Description

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

(They may not occur periodically.)

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1. Bad contacts of the voltage terminals to developer.

Check and Cause

2. The rollers of developer may be stained.

Charge roller = 37.7mm

Supply roller = 37mm

Develop roller = 35.3mm

Transfer roller = 45.3mm

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 developer.

7.1.4 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 Developer may be contaminated with foreign matte or paper particles.

( Charge roller : 37.7 mm interval

OPC drum : 75.5 mm interval)

2. If faded areas or voids occur in a black image at intervals of 75.5 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 75.5 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.

sheets printing. If the roller's life is expired, replace it.

4. In case of 37.7 mm interval unremovable in

1, take measures as to replace the developer 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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Samsung Electronics


7.1.5 Light Image

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

Digital Printer

Digital Printer

Digital Printer

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Check and Cause

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

2. Ambient temperature is below than 10°C.

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.

Solution

1. Check if the Toner Save mode is off.

2. Replace the developer cartridge and try to print out.

3. Wait 30 minutes after printer is powered on before you start printing.

4. Clean up the contaminated area by the toner.

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

7.1.6 Dark Image or a Black

• Description The printed image is dark.

Digital Printer

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Check and Cause

1. No charge voltage in the engine board.

( Perform DCU diagnostic code 01)

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

Solution

1. Clean the high voltage charge terminal.

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

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


7-3

Samsung Electronics


7.1.7 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 toner level is not even on the developer roller due to the bad blade.

Solution

1. Replace both the left and right Spring

Holder.

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

7.1.8 Background

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

Digital Printer

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Check and Cause

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

2. Does recycle paper be used?

3. Has the life span of the developer ended?

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

5. Is the HVPS normal?

Solution

1. The toner cartridge is basically designed to print 3,000 sheets with

5% image. If it prints more than

3,000 sheets (around 5,000 sheets) with 2% image, a background can be occurred.

2. The B/S is not guaranteed if using recycle paper.

3. Replace the developer 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 developer.

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Samsung Electronics


7.1.9 Ghost (1)

• Description Ghost occurs at 75.5 mm intervals of the OPC drum in the whole printing.

Digital Printer

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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 Developer.

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 developer is expired.

Solution

1. Clean the terminals when contaminated by toner particles.


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

4. Transfer roller lifetime(60.000 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).

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

7.1.10 Ghost (2)

• Description

Ghost occurs at 75.5 mm intervals of the OPC drum in the whole printing.

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

Digital Printer

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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 'Thick Mode' on paper type menu from the software application and after using returning to the original mode is recommended.


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Samsung Electronics


7.1.11 Ghost (3)

• Description White ghost occurs in the black image printing at 32mm intervals.

Check and Cause

1. The life of the developer may be expired.

2. The abnormal voltage and bad contact of the terminal of the supply roller

Solution


2. Check the approved voltage of the supply roller and contact of the terminal and adjust if necessary.

7.1.12 Ghost (4)

• Description Ghost occurs at 47 mm intervals.

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)

7.1.13 Satins on the Face of Page

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

Digital Printer

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Check and Cause

1. Toner leakage due to improperly sealed developer.

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

Solution

1. Replace the developer cartridge.

2. If the transfer roller is contaminated, run PC

Cleaning Mode Print 2 or 3 times.

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

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Samsung Electronics


7.1.14 Satins on Back of Page

• Description The back of the page is stained at 47 mm intervals.

Check and Cause

1. Transfer roller is contaminated.

Digital

Digital Pri

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2. Pressure roller is contaminated.

Solution

1. Perform the OPC Cleaning Mode Print 2 or

3 times. Run Self-Test to remove the contamination of the transfer roller.

2. Replace the transfer roller if contaminated severely.

3. 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.

7.1.15 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 developer.

Solution

Remove contamination of the terminals of the developer and the unit.

7.1.16 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 developer.

2. Abnormal solenoid.

Solution

1. Remove contamination of the terminals of the developer.

2. Perform the engine self test using DCU to check if the Solenoid is normal.(refer to code 06)

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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Samsung Electronics


7.2 bad discharge

7.2.1 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

7.2.2 JAM 0

Fuser

PR

L S U

CR

OPC

TR

DR

SR

PTL

Toner Cartridge

FR

MP Sensor

P I

C

K

/R

Empty Sensor

• 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 Solenoid by using DCU diagnostic mode

06.

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

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

4. If the paper feeds into the printer rand Jam 0 occurs, perform DCU to check feed-sensor of the engine board.

Solution

1. Replace the solenoid.

2. Replace the side-pad Assembly L or R, if necessary.

3. Clean with soft cloth dampened with IPA(Isopropyl

Alcohol) or water.

4. Replace the SMPS-HVPS and/or Sensor.

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Samsung Electronics


7.2.3 JAM 1

Fuser

PR

L S U

CR

Toner Cartridge

OPC

TR

DR

SR

PTL

Feed

Sensor

FR

MP Sensor

P I

C

K

/R

Empty Sensor

• 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. (Perform DCU diagnostic code 08)

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.

7.2.4 JAM 2

1. Replace the SMPS.

Solution

2. Reassemble the Actuator-Feed and Spring-Actuator if the returning is bad.

Fuser

EXIT

Sensor

PR

L S U

CR

OPC

TR

DR

SR

PTL

Toner Cartridge

FR

MP Sensor

K

/R

Empty Sensor

• 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 unformed (Check if the lever part is unformed 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 matters 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.


7-9

Samsung Electronics


7.2.5 Multi-Feeding

• Description Multiple sheets of paper are fed at once.

Check and Cause

1. Solenoid malfunction(the solenoid does not work properly): Perform DCU Diagnostic Code 06.

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

3. The face of paper is blended.

Solution

1. Replace the solenoid if necessary.

2. Clean the pad friction with soft clothe dampened with IPA(Isopropyl Alcohol).

3. Use the smooth paper.

7.2.6 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 unfitted.

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. The surface of the heat roller with IPA or water

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

7-10


Samsung Electronics


7.2.7 Paper rolled in the Toner Cartridge (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 in the OPC Drum.

• Remove the paper while turning the OPC

Drum against the ongoing direction.

• C;eam fomger[romts on the OPC Drum spft;u with IPA(Isopropyl Alcohol) or tissue.

Samsung Electronics


7-11


7.3 Malfunction

7.3.1 All LEDs blinking (Fuser Error)

• Description

1. All the lamps on the operator panel blink.

2. Gear of the fuser does not work and breaks away melt away.

When printing, motor breaks away from its place due to defective fuser gear.

Check and Cause

1. Check if the thermostat, AC wire and Heat Lamp is open.

2. Check if the thermistor sensor is in place.

3. Check if the heat lamp works properly.

4. Check if the overheat circuit works properly.

5. The fuser gear is defective due to melting away.

Solution

1. If the thermostat is open replace the fuser and check following items.

2. If the thermistor sensor device is located deep in the sponge, replace the fuser.

3. Check if the circuit of overheat mode works properly.

4. Run DCU mode : Perform DCU diagnostic code 10.

5. Replace Fuser.

7.3.2 All LEDs blinking (Scan Error)

• Description 1. All lamps on the operator panel blink.

Check and Cause

DCU Mode : Perform DCU diagnostic code 05. If the DCU error code 95 is displayed, replace LSU.

Replace LSU.

Solution

If you cannot solve the problem after you replace LSU, replace the main board.

7-12


Samsung Electronics


7.3.3 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

DCU Mode : Check if the Error States '60' '62' '68' occur.

Check the operation of Fuser Erasing Lamp

On/Off with the Error Code Check -10-.

1. Replace the Fuser.

Solution

2. Replace the Main Control board.

7.3.4 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 Perform

DCU mode : Perform DCU diagnostic code 8.

Solution

1. Replace the defective actuator.

2. Replace the engine board.

7.3.5 Paper Empty without indication

• Description 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. The function of the engine board is defective Perform.

DCU mode : Perform DCU diagnostic code 8.

Solution

1. Replace the defective actuator.

2. Replace the engine board.


7-13

Samsung Electronics


7.3.6 Cover Open

• Description

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 connector (Engine B’d

↔

HVPS) and circuit of the cover switch department in the Main Control board.

Perform DCU mode : If Error state '64' occurs, Check the related codes of the Cover Open Error.

2. Check the insertion of the Cover Open S/W

Connect.

3. Replace the Main Control board or Cover Open

S/W.

7.3.7 No lamp on when the cover is open

• Description The ERROR lamp does not come on even when the printer cover is open

Check and Cause

1. Check the connector(CN8) and circuit of the cover switch department in the Main Control board. Perform DCU mode : If Error state '64' occurs, Check the related codes of the Cover Open Error

Solution

1. Check the insertion of the Cover Open S/W

Connect.

2. Replace the Main Control board or Cover Open

S/W.

7-14


Samsung Electronics


7.3.8 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. Motor harness or sub PCB may be defective.

Solution

1. Check the motor harness, replace it, if defective.

2. Perform DCU diagnostic code 00 and Check the motor operation.

2. Replace the SMPS, if necessary.

7.3.9 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.

Solution

1. Replace the power supply cord or SMPS.

2. Check the inferiority of LED-Panel on the front-cover if the LED of Panel does not appear after normal warmingup.

2. Replace the control board.

3. Replace the LED-panel.


7-15

Samsung Electronics


7.3.10 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 DCU Mode : LSU Check

-05- LSU Motor on.

1. Replace LSU.

Solution

2. Replace the Main Control board.

7-16


Samsung Electronics


7.4 Toner Cartridge Service

It is not guaranteed for the default caused by using other toner cartridge other than the cartridge supplied by the Samsung Electronic or caused by non-licensed refill production.

7.4.1 Precautions on Safe-keeping of Toner Cartridge

Excessive exposure to direct light more than a few minutes may cause damage to the cartridge.

7.4.2 Service for the Life of Toner Cartridge

If the printed image is light due to the life of the toner, you can temporarily improve the print quality by redistributing the toner(Shake the toner cartridge), however, you should replace the toner cartridge to solve the problem thoroughly.

7.4.3 Redistributing Toner

When toner is low, faded or light areas may appear on a printed page. You may be able to temporarily improve the print quality by redistributing the toner. The following procedures may allow you to finish the current print job before replacing the toner cartridge.

1) Grasp the front cover and pull it toward you to open.

2) Remove the toner cartridge from the printer

3) Gently shake the toner cartridge from side to side five or six times to redistribute the toner.

Note :

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.

Note :

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

4) Reinsert the toner cartridge into the printer.

Ensure that the toner cartridge snaps into place.

5) Close the front cover. Make sure that the cover is securely closed.

1.7


7-17

Samsung Electronics


7.4.4 Signs and Measures at Poor toner cartridge

Fault

Light image and partially blank image

(The life is ended.)

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Signs Cause & Check

• The printed image is light or unclean and untidy.

• Some part of the image is not printed.

• Periodically a noise as "tick tick" occurs.

1. If the image is light or unclean and untidy printed image -

Shake the developer and then recheck.

(1)NG : Check the weight of the developer

(2)OK : Lack of toner, so the life is nearly closed.

2. Some part of image is not printed - Shake the developer and then recheck.

(1)NG : Check the weight of the developer and clean the LSU window with a cotton swab, then recheck.

(2)OK : Lack of toner, so the life is nearly closed.

3. Periodically a noise as "tick tick" occurs - Measure the cycle and the weight of the developer.

4. White vertical stripes on the whole screen or partly :

Check the weight of the developer.

Solution

1. All of 1, 2, 3 above-

If it become better by shaking, replace with a new developer after 35.3-100 sheets in the closing state of the life span.

2. In case of 2-

If it becomes better after cleaning the LSU window, then the developer is normal.

(Because of foreign substance on the LSU window, the image has not been printed partly.)

3. In case of 3-

If the cycle of noise is about 2 seconds, the toner inside the developer has been nearly exhausted.( Purchase and replace with a new developer after using about 200 sheets at the point of occurrence)

4. In case of 3-

This is a phenomenon caused by lack of toner, so replace with a new developer.

Toner

Contamination

• Toner is fallen on the papers periodically.

• Contaminated with toner on prints partly or over the whole surface.

1. Toner is fallen on the paper periodically.

(1)Check the cycle of the falling of the toner.

(2)Check the appearance of both ends of the developer

OPC drum.

2.The center of the printed matter is contaminated with toner.

(1)Check whether foreign substances or toner are stuck to the terminal (contact point) of the developer.

(2)Check whether the state of the terminal assembly is normal.

1. If both ends of the OPC drum are contaminated with toner:

Check the life of the developer.

2. Check whether it could be recycled.

3. If it cannot be recycled:

Replace the developer.

7-18


Samsung Electronics


Fault

White Black spot

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Signs Cause & Check

• Light or dark black dots on the image occur periodically.

• White spots occur in the image periodically.

1. If light or dark periodical black dots occur, this is because the developer rollers are contaminated with foreign substance or paper particles.

(1)37.7mm interval : Charged roller

(2)75.5mm interval : OPC cycle

2. If white spots occur in a black image at intervals of 75.5mm, or black spots occur elsewhere, the OPC drum is damaged or foreign substance is stuck to the surface.

3. If a black and white or graphic image is partially broken at irregular intervals, the transfer roller's life has been expired or the transfer voltage is abnormal.

Solution

1. In case of 1 above -

Run OPC Cleaning Mode Print

4-5 times repeatedly to remove.

Especially check foreign substance on the OPC surface, then remove them with a clean gauze moistened with IPA(Isopropyl

Alcohol) not to damage OPC if necessary.

Never use usual alcohol.

2. In case of 2

If they are not disappeared by running OPC Cleaning Mode

Print 4-5 times.

: at intervals of 37.7mm - Replace the developer.

: at intervals of 75.5mm - Remove foreign substance.

: Broken image - Replace the developer according to carelessness.

3. In case of 3 - Exchange the transfer roller because the life of the transfer roller in use has been expired. (Check the transfer voltage and readjust if different.)

Recycled product • Poor appearance of the developer.

• Unclean and rough printouts.

• Bad background in the image.

1. Poor appearance of the developer.

(1)Check the damage to label and whether different materials are used.

(2)Check the appearance of parts of the developer, such as frame, hopper.

1. In case of 1 -

(1)If there is an evidence of disassembling the developer.

(2)If materials other than normal parts of the developer are added or substituted.

2. Unclean and rough printouts.

(1)Check whether foreign substance or toner are stuck to the terminal (contact point) of the developer.

(2)Check whether the state of the terminal assembly is normal.

2. In case of 2 - If there are any abnormals in connection with the situation of 1.

(1)It occurs when the developer is recycled over 2 times.

(2)If toner nearly being expired are collected to use, it is judged as the recycled developer.


7-19

Samsung Electronics


7.5 Bad Environment of The Software

7.5.1 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.

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

3. Printing is nor working in the Windows.

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). Perform DCU to check the

Error Status.

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

(refer to Toner Cartridge Service 7.4)

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.

7-20


Samsung Electronics


7.5.2 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.

Samsung Electronics


7-21


7.5.3 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.

7-22


Samsung Electronics


7.5.4 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.


7-23

Samsung Electronics

E X P LO D E D VIEW & PA RTS LIST

8

8. Exploded Views and Parts List

5-1. Main Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(5-2)

5-2. Frame Unit Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . page(5-4)

5-3. Drive Unit Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . .

page(5-7)

5-4. Cassette Unit Assembly . . . . . . . . . . . . . . . . . . . . . . . . . page(5-8)

5-5. Fuser Unit Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . page(5-10)


8-1

Samsung Electronics


8.1 Main Assembly

8-2


Samsung Electronics


14

15

16

16-1

16-2

16-3

17

18

19

20

7

8

9

10

5

6

3

4

2-3

2-4

2-5

2-6

2-7

2-8

11

11-1

11-2

11-3

12

13

11-4

11-5

Main Assembly Parts List

0

1

2

No.

2-1

2-2

Description

ML-1710 / ML-1750

ELA UNIT-FRAME LOWER, 110V

MEA UNIT-COVER TOP

MEA UNIT-COVER TOP

MEA UNIT-COVER TOP

MEA UNIT-COVER TOP

LENS LED-M-LED

COVER-M-TOP

COVER-TOP

COVER-TOP

COVER-TOP

COVER-M-REAR

PMO-STACKER_RX

PMO-BUSHING_F/DOWN

PMO-SUB STACKER

SPRING-CS

KEY-M-ON LINE

PLATE-P-CHANNEL

CBF HARNESS-MOTOR

SMPS- V1(XAA)

UNIT-HUMMINGBIRD LSU

PBA MAIN-PANEL

COVER PCB-M-PCB

CBF HARNESS-LSU

ELA UNIT-RX DRIVE

MEA UNIT-COVER FRONT, USA

COVER-M-FRONT

ADJUST-M-MANUAL_L

ADJUST RACK-M-MANUAL

GEAR-RACK_PINION

ADJUST-M-MANUAL_R

MEA UNIT-CASSETTE, USA

PBA MAIN-CONTROLLER GDI_1L

PBA MAIN-CONTROLLER

CBF HARNESS-ENGINE

CBF HARNESS-ENGINE

FAN-DC_HUMMINGBIRD

MEA ETC-TR

ROLLER-TRANSFER ROLLER

GEAR-TRANSFER

PPR-SPACER_TR

MEA UNIT-TONER CART_ DOM_1K

CBF HARNESS-PANEL

SHIELD-P-ENGINE

BRACKET-P-INLET

SEC.Code

JC96-02732A

JC97-01748A

JC97-01749A

JC97-01748F

JC97-01749N

JC67-00026A

JC63-00102A

JC63-00102F

JC63-00102T

JC63-00102U

JC63-00101A

JC72-00973A

*

JC72-01001A

6107-001169

JC64-00039A

JC61-00606A

JC39-00241A

JC44-00046A

JC59-00018A

JC92-01439A

JC63-00104A

JC39-00242A

JC96-02733A

JC97-01746A

JC63-00103A

JC70-00302A

JC70-00304A

JC66-00387A

JC70-00303A

JC97-01750A

JC92-01426A

JC92-01424D

JC39-00240A

JC39-00240B

JC31-00027A

JC97-01793A

JC66-00528A

JC66-00395A

JC72-00851A

*

JC39-00244A

*

JC61-00601A

SA : Service Available

O : Service available X : Service not available

Q’ty SA Remark

110V

ML-1710A

ML-1750A

ML-1710

ML-1750

1

1

2

1

1

1

1

1

1

1

1

1

1

1

1

1

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

2

1

1

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

X

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

X

X

O

X

O

110V

ML-1710/XAA

ML-1750/XAA

ML-1710/XAX

ML-1750/XAX

ML-1710/XAA

ML-1750/XAA

ML-1710/XAX

ML-1750/XAX


8-3

Samsung Electronics


8.2 Frame Unit Assembly

8-4


Samsung Electronics


Frame Unit Assembly Parts List

25

26

27

28

21

22

23

24

17

18

19

20

13

14

15

16

9

10

11

12

7

8

5

6

2

3

4

0

1

41

42

43

44

37

38

39

40

45

46

47

48

33

34

35

36

29

30

31

32

No.

Description

ELA UNIT-FRAME LOWER, 110V

FRAME-M-BASE

GUIDE-P-TR

PLATE-P-SAW

GUIDE-M-TR RIB

GEAR-EXIT F/DOWN

MEC-BEARING,EXIT

ROLLER-EXIT F/DOWN

SPRING-CS

PMO-GEAR_EXIT_DRV16

HOLDER-M-EXIT F/DOWN

PMO-ROLLER_EXIT,MAIN

PMO-ROLLER_EXIT,FR

MEC-TERMINAL

IPR-P-TERMINAL CON

IPR-P-TERMINAL CR

HOUSING-TERMINAL

PMO-LOCKER CST

PMO-ACTUATOR CVR OPEN

PMO-PLATE GUIDE DEVE_R

SPRING ETC-GUIDE DEVE

IPR-P-GROUND_GUIDE PAPER

PMO-PLATE GUIDE DEVE_L

PMO-ACTUATOR FEED

PMO-ACTUATOR EMPTY

PMO-ACTUATOR MANUAL

IPR-P-GROUND_EARTH TR

SPRING-ETC

ROLLER-FEED ROLLER 1

PMO-BUSHING FEED

ROLLER-FEED

SPRING-TS

IPR-P-EARTH TRANSFER

HOLDER-PTL

LENS-PTL

BUSH-M-TR L

SPRING ETC-TR L HAWK

SPRING-TS

PMO-BUSHING_TR(L)

IPR-P-GROUND_FUSER

SHAFT-FEED IDLE

BUSH-M-FEED IDLE

SPRING ETC-TR

IPR-P_GROUND_DRIVE2

SPRING-TS

CAM-M-PICK_UP

IPR-P-GROUND_DRIVE

SOLENOID-HB (PICK-UP)

SOLENOID-HB (MANUAL) continue on the next page.

SEC.Code

JC96-02732A

*

JC61-00607A

JC61-00604A

JC61-00594A

*

*

JC66-00378A

6107-001163

*

JC61-00582A

*

*

JC75-00049A

JC70-00312A

JC70-00313A

JC61-00592A

JC72-00983A

JC72-00974A

JC72-00985A

*

JC70-00458A

JC72-00984A

JC72-00976A

JC72-00975A

JC72-00977A

*

6107-001162

*

*

JC66-00598A

*

JC70-00307A

JC61-00583A

JC67-00027A

JC61-00588A

*

*

JC72-00102A

JC70-00310A

JC66-00527A

*

*

JC70-00335A

6107-001170

JC66-00377A

JC70-00308A

JC33-00009A

*

1

1

1

1

1

1

1

1

1

2

2

1

1

1

4

3

4

4

2

4

1

4

1

2

1

1

1

1

1

2

2

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

5

1




110V

O

X

O

X

O

O

O

O

O

O

O

X

O

O

O

O

X

O

X

X

X

X

O

O

O

X

O

O

O

X

X

O

O

X

O

O

O

O

O

O

X

O

O

O

X

X

O

X

O

Spring Exit

Spring-act,Manual

Spring-act,Feed

Spring Feed Idle

Spring-cam Pick-up


8-5

Samsung Electronics


Frame Unit Assembly Parts List(Cont.)

No.

58-1

58-2

58-3

58-4

58-5

58-6

59

58-7

60

61

62

59-1

59-2

59-3

59-4

55

56

57

58

51

52

53

54

49

49-1

49-2

50

49-3

Description

AS-GEAR PICK_UP

PMO-GEAR PICK_UP B

PMO-GEAR PICK_UP A

SPRING-CS

BRACKET-P-FEED

IPR-P-GROUND_TR

SHAFT-FEED

RING-CS

GEAR-FEED 2

GEAR-IDLE 23

GUIDE-P-PAPER

RMO-RUBBER_FOOT

AS-PICK UP

BUSH-M-PICK_UP L

SHAFT-P-PICK_UP

STOPPER-PICK_UP

PMO-IDLE PICK_UP

SPONGE-ROLLER PICK_UP

BUSH-M-PICK_UP R

HOUSING-M-PICK_UP

MEA UNIT-CLUTCH

GEAR-FEED 1

PMO-COLLAR_SPRING

SPRING-TS

PMO-HUB CLUTCH

AS-FUSER 110V

RMO-RUBBER EXIT

PBA MAIN-PTL

SEC.Code

JC81-01692A

JC72-00980A

JC72-00979A

*

JC61-00602A

JC70-00311A

JC66-00398A

*

JC66-00394A

JC66-00396A

JC61-00718A

*

JC81-01693A

*

*

*

JC72-00982A

JC72-01231A

JC61-00587A

JC61-00591A

JC97-01788A

JC66-00393A

JC72-00978A

*

JC72-00981A

JC81-01689A

*

*

Q’ty

1

4

1

1

1

1

1

1

1

1

1

2

2

1

1

2

1

1

1

3

1

1

2

1

1

1

1

1



Remark SA

O

X

X

O

O

X

O

O

O

O

O

X

X

X

O

O

O

X

O

O

O

X

O

O

O

O

X

O

Spring-Pick-up gear

110V

8-6


Samsung Electronics


8.3 Drive Unit Assembly

0

7

6

8

1

4

5

4

5

3

2

9

HARNESS-MOTOR

Drive Unit Assembly Parts List

6

7

4

5

2

3

0

1

8

9

10

No.

Description

ELA UNIT-RX DRIVE

BRACKET-P-GEAR 1400

GEAR-RDCN 53/26

GEAR-RDCN 113/33

GEAR-RDCN 57/18

RING-E

BRACKET-P-MOTOR 1400

GEAR-RDCN 103/41

GEAR-RDCN 90/31

MOTOR STEP-HUMMINGBIRD

PMO-IMPELLER_DRV

SEC.Code

JC96-02733A

*

*

*

*

*

*

JC66-00390A

JC66-00392A

JC31-00028A

*



Remark Q’ty

1

1

2

2

1

1

1

1

1

1

1

SA

X

X

X

O

O

X

X

X

O

O

X


8-7

Samsung Electronics


8.4 Cassette Unit Assembly

17

16

6

7

10

11

8

9

18

5

4

5

0

14

12

2

3

1

13

15

8-8


Samsung Electronics


Cassette Unit Assembly Parts List

No.

11

12

13

14

7

8

9

10

15

16

17

18

5

6

3

4

0

1

2

Description

MEA UNIT-CASSETTE, USA

FRAME-M-CASSETTE

PMO-EXTENSION LARGE

PMO-EXTENSION SMALL

PLATE-P-KNOCK_UP

SPRING-CS

HOLDER-M-PAD

SPRING ETC-EXIT ROLL FD

ROLLER-M-IDLE FEED

SPRING-ES

PMO-PLATE_LOCKER

SPRING ETC-LOCKER,PLATE

ADJUST-M-CASSETTE_L

ADJUST-M-CASSETTE_R

GEAR-PINION

INDICATOR-M-LEVER INDICATOR

RPR-FRICTION PAD

IPR-PLATE PAD

RPR-PAD CASSETTE

SEC.Code

JC97-01750A

*

JC72-00970A

JC72-00971A

*

*

*

*

*

*

*

*

JC70-00300A

JC70-00301A

*

JC64-00040A

JC73-00140A

*

*




1

1

1

1

2

1

1

2

1

3

1

1

2

1

1

1

1

1

1

X

O

O

X

X

X

X

X

O

O

X

X

O

X

X

X

O

X

O

Samsung Electronics


8-9


8.5 Fuser Unit Assembly

23

0

12

11

10

9

8

7

32

6

33

4

32

5

3

2

1

17

13

16

15

14

18

24

22

19

25

20

21

31

27

30

26

29

28

8-10


Samsung Electronics


Fuser Unit Assembly Parts List

No.

27

28

29

30

23

24

25

26

31

32

33

19

20

21

22

15

16

17

18

11

12

13

14

7

8

9

10

5

6

3

4

O

1

2

Description

AS-FUSER 110V

COVER-M-FUSER

HOLDER-M-PLATE CLAW

SPRING ETC-CLAW

PMO-ROLLER EXIT

SPRING ETC-FUSER EXIT

THERMOSTAT-150

PMO-GEAR_EXIT_DRV16

GEAR-IDLE 23

RING-CS

GEAR-RDCN 25/15

IPR-ELECTRODE_LAMP

ELECTRODE-WIRE_L

THERMISTOR-NTC

ELECTRODE-WIRE_R

CBF HARNESS-FUSER 110V

GEAR-FUSER, Z37

BUSH-M-HR L

ROLLER-HEAT

BUSH-M-HR R

LAMP-HALOGEN

ROLLER-M-EXIT F/UP

ROLLER-PRESSURE

BEARING-PRESSURE/R

SPRING-CS

PMO-BUSHING TX

HOLDER-ACTUATOR

PMO-ACTUATOR_EXIT

IPR-P-FRAME_FUSER

GUIDE-M-INPUT

SPRING-TS

RMO-RUBBER_EXIT

NUT-HEXAGON

LABEL(P)-CAUTION, HOT_FUSER

SEC.Code

JC81-01689A

*

*

*

*

*

JC47-00005A

*

*

*

JC66-00397A

*

*

1404-001298

*

JC39-00239A

JC66-00564A

*

JC66-00601A

JC61-00590A

4713-001155

*

JC66-00600A

*

*

*

*

JC72-00987A

*

*

*

*

*

*




1

1

1

1

3

1

2

2

2

5

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

2

1

4

2

1

1

4

O

X

X

X

X

X

X

X

X

X

X

O

O

X

O

O

O

X

O

O

X

X

X

X

O

X

X

X

O

X

X

O

X

X

110V

White

110V


8-11

Samsung Electronics


8-12


Samsung Electronics

9

9. Block Diagram

9.1 PCL Model

B LO C K D I AG R A M

Samsung Electronics


9-1

B LO C K D I AG R A M

9.2 SPL Model

9-2


Samsung Electronics

C O N N E C T I O N D I AG R A M

1 0

HOST

COMPUTER

IEEE1284

COMOPATIABLE

CABLE

USB CABLE

38 PIN

37

38

CN5

CN9

4

3

5

2

1

9

1 0

1 1

7

6

8

6 PIN

CN11

CONNECTOR

CN14 for USB

6

5 CN12

2

1

2

1

THERMISTOR

MOTOR

3

2

4

1

2

1

THER 1

THER 2

A

B

A/

B/

+3.3V

DCU_DATA

DCU_CLK

GND

CN6

2

1

2

1

3

2

1

4

2 2

1 1

3 3

4 4

PCL MAIN BOARD

FR-4, 4LAYER

CN8

CN10

CN3

CN13

11

12

13

9

8

10

14

15

16

20

21

22

17

18

19

23

24

25

26

3

2

4

1

7

6

5

DCU

4

3

2

1

LSUCLK nLREADY nPMOTOR

GND

24VS

*HSYNC

5V

GND nLD_ON

VDO

GND

+3.3V

PTL

+24V

MP_CLUTCH

+24V

MAIN_CLUTCH

5

4

2

1

2

1

3

4

3

5

6

POLYGON

MOTOR

LD

LSU

DIODE

2

1

PTL LED ARRAY

2

1

Manual Clutch

2

1

Main Clutch

P_EMPTY

P_FEED

3.3V

3.3V

3.3V GND

3.3V GND

5V

3.3V GND

3.3V GND

3.3V GND

24VS

24VS

MP_EMPTY

24VS

LED_READY

THV_READ

LED_ERROR

THV_PWM

THV_EN

BIAS_PWM

MHV_PWM

LED_TONER SAVE

KEY_DEMO

FAN

FUSER

P_EXIT

9

12

11

7

8

10

14

13

16

20

19

22

15

18

17

5

6

3

4

1

2

21

24

23

26

25

SMPS

HVPS

CN5

FAN

PANEL


10-1

Samsung Electronics

C O N N E C T I O N D I AG R A M

10.2 SPL Model

HOST

COMPUTER

USB CABLE

4P IN

CONN-E CTOR for

US B

CN3

CN6

3

4

5

1

2

6

7

8

9

1 0

1 1

CN8 1

2

THERMISTOR

2

1

MOTOR

2

1

3

4

DCU

2

1

3

4

CN9

1

2

THE RM

THE RM2

2

1

CN5

CN3 1

2

A

A/

B

B/

+ 3.3V

D CU _D ATA

D CU _C LK

G ND

3

2

4

1

CN7

SPL

MAIN

BOARD

FR-4, 2Layer

3

2

4

1

CN2

CN10

11

12

13

8

9

10

5

6

7

1

2

3

4

23

24

25

20

21

22

17

18

19

14

15

16

26

LSUCLK nLREADY nPMOTOR

GND

24VS

*HSYNC

5V

GND nLD_ON

VDO

GND

+3.3V

PTL

+24V

MP_CLUTCH

+24V

MAIN_CLUTCH

3

4

5

1

2

6

1

2

3

4

5

POLYGON

MOTOR

LD

LSU

DIODE

1

2

PTL LED ARRAY

1

2

Manual Clutch

1

2

Main Clutch

P_EMPTY

P_FEED

3.3V

3.3V

3.3V GND

3.3V GND

5V

3.3V GND

3.3V GND

3.3V GND

24VS

24VS

MP_EMPTY

24VS

LED_READY

THV_READ

LED_ERROR

THV_PWM

THV_EN

BIAS_PWM

MHV_PWM

LED_TONER SAVE

KEY_DEMO

FAN

FUSER

P_EXIT

9

12

11

14

13

16

3

6

5

2

1

4

8

7

10

21

24

23

20

19

22

15

18

17

26

25

SMPS

HVPS

CN5

FAN

PANEL

10-2


Samsung Electronics

11. Schematic Diagrams

11

11.1 PCL Main Circuit Diagram (1/7)

Samsung Electronics

S C H E M ATIC DIAG R A M S


11-1


PCL Main Circuit Diagram (2/7)

11-2


Samsung Electronics


Samsung Electronics



11-3



11-4


Samsung Electronics


Samsung Electronics



11-5



11-6


Samsung Electronics


Samsung Electronics



11-7


11.2 SPL Main Circuit Diagram (1/5)

11-8


Samsung Electronics

SPL Main Circuit Diagram (2/5)

Samsung Electronics



11-9



11-10


Samsung Electronics


Samsung Electronics



11-11



11-12


Samsung Electronics


11.3 HVPS Circuit Diagram (1/2)

R203

2K

5V

R202

100

CON2-16

THV-PWM

R201

430

R204

47K

Q201

A708-Y

THV-sen

R205

22K

C201

473

C202

102

5V

D201

1N4148

C204

103

5

+

6

-

7

U102-B

KA324

C203

681

R206

180K-F

THV

50K

C205

473

R207

330K-F

CON2-17

THV-EA

CON2-18

THV-READ

R308

C307

473

1K

R301

1K

C306

INDEX

50K

473

R307

150K

+

1

U102-A

KA324

-

3

2

5V

R309

N.U

24VS

R208

10K

5V

Q301

C945C-Y

R209

100K

Q202

C945C-Y

Q203

C2383

R210

5.6K

C206

104

D203

D1NL20U

C207

103

C208

681

4

2 ¡

IT201

6

¡ 7 5

1 ¡

IT-01

ZD201

2.7V

R211

1/4W 4.7

D202

D1NL20U

C212

2KV 221

24VS

R302

470K

C302

103

R303

470

C301

104

C303

103

IT301

4

2

¡

6

¡ 7 5

1 ¡

IT-01

ZD301

2.7V

Q302

C2383

R304

1/4W 4.7

D301

D1NL20U

D304

1N4148

C210

6KV 221

D204 D205

6KV 6KV

C209 6KV 221

D206

C211

6KV 221

6KV

R212

1/2W 100K

THV

TNR201

5N221K

TNR202

5N431K

TNR203

5N431K

D302

4KV C304

3KV 151

R306

150KF

C305

104

R213

MGR1/2W 100MF

R305

MGR1/2W 50M

THV-sen

D303

1N4148

D305

1N4148


11-13

Samsung Electronics


HVPS Circuit Diagram (2/2)

MHV-sen

MHV-PWM

CON2-19 R401

47K

C401

473

R402

22K

C402

102

5V

D401

1N4148

C404

472

R403

1.5M

D402

1N4148

C403

331

12

13

+

14

-

U102-D

KA324

R404

10K

Q401

A708-Y

R405

10K

ZD401

2.7V

R406

5.6K

Q402

C945C-Y

ZD402

2.7V

24VS

R407

100K

R408

470

C405

104

Q403

C2316

R409

1/4W 4.7

C406

103

D403

D1NL20U

C407

103

4

2 ¡

IT401

6

5

1 ¡

IT-01

¡ 7

5V

D404

4KV

R410

1/2W 560K

C409

3KV 471

R412

30KF

R411

MGR1/2W 20MF

MHV-sen

C408

103 MHV

20K

C410

221

R413

1/2W 100K

MHV

R414

MGR1/2W 15MF

ZD403

130V

OPC

BIAS-sen

BIAS-PWM

CON2-20

R501

47K

C501

473

R502

22K

C502

102

C112

50V 10uF

24VS

+

5V

D501

1N4148

C504

472

R503

330KF

D502

1N4148

C503

681

10

+

9

-

8

U102-C

KA324

R504

10K

Q501

A708-Y

R505

10K

ZD501

2.7V

R506

5.6K

Q502

C945C-Y

ZD502

2.7V

24VS

R507

100K

C506

103

R508

470

C505

104

Q503

C2316

R509

1/4W 10

D503

D1NL20U

C507

103

4

2 ¡

IT501

D504

4KV

6 C509

3KV 471

¡ 7 5

1 ¡

R510

1/2W 1.8M

R511

IT-01

5V

C510

3KV 101

BIAS-sen

R512

30KF

C508

103

DEV

20K

R515

MGR1/2W 15MF

R513

1/2W 50K

ZD503

200V

R514

1/2W 50K

SUPPLY

DEV

IN

U103

KA7805

OUT

5V

+ C113

25V 47uF

11-14


Samsung Electronics


11.4 SMPS Circuit Diagram : 110V (1/2)

Humming-V1 SMPS circuit diagram

SW1

3024-P3T4DBKBK

INLET1

CON1

2

1

F1

125V 8A LF1

0509V

AR1

DSS-601M

F2

125V 3A LF2

0504V

R14 R2

C3 C2

472MAA

472MAA

PT1

EER2828V

TVR1

10D221K

R1

1/2W

560K

D1,2,3,4

600V2A*4

+

C6 R5

3W

47K

6

C101

1KV 102

C1

224

TH1

10D-13

C4

104

C5

200V

330uF

R3

5

9

8

D101,102

200V 3A*2

C102

35V

1000uF

R15

D5

UF4007

1

R4

R13

1/4W 100

L1

100uH

R11

1W 47

FUSIBLE

C10

630V

333

U1

BTA12-600B

C11

50V

104

PC102

TLP3061F

R12

1W 180

FUSIBLE

Q102

C1008-Y

R114

1/2W

1.5K

10

1

Drain

U2

PWM CONTROL

STR-G6353

Vin

4

Source

2

GND

3

OCP/FB

5

B1

D6

200V1A

VR1

500 R6

100

3

PC101-B

817M-B

R8

680

C7

35V

22uF

R10

47K

4

R9

1W0.25

C8

681

R7

6.8K

7

11

8

D103

40V 3A

C106

1KV 102

C13

472MAA

C12

472MAA

CON2-11,12,13(+24VS)

CON2-26(FUSER-ON)

NO MARKING RESISTOR 1/8W-J(5%)

D104

100V 1A

R109

330

C103

16V

100uF

R110

430

C107

16V

1000uF

U101

TL431

1 2

L101

5uH

3

U105

7805

PC101-A

817M-B

C108

50V 1uF

R111

1.8K-F

1

R112

5.6K-F

C104

25V

47uF

SW2

SS-5GLD

F101

250V2A

C109

10V

470uF

C105

50V

1uF

CON2-11,12,13

+24VS 2.0A

CON2-9,10

GND

CON2-8

+5V 0.14A

CON2-7

GND

CON2-3,4

+3.3V 1.0A

GND

CON2-5,6

CON2-1(FEED-SEN)

CON2-2(PAPER-EMPT)

CON2-14(MANUAL)

CON2-15(THV-READ)

CON2-16(LED-READY)

CON2-17(THV-PWM)

CON2-18(LED-ERROR)

CON2-19(BIAS-PWM)

CON2-20(THV-EA)

CON2-21(LED TONER SAVE)

CON2-22(MHV-PWM)

CON2-23(FAN)

CON2-24(KEY-DEMO)

CON2-25(EXIT)

CON2-26(FUSER-ON)


11-15

Samsung Electronics


SMPS Circuit Diagram : 110V (2/2)

3.3V

R125 R126 R127 R128

1

OP104

SG-288 2

3

4

1

2

3

4

OP103

KPI-512

CON2-2(PAPER EMPTY)

CON2-1(FEED SENSOR)

3.3V

R115 R116 R117 R118

1

OP103

KPI-512 2

3

4

1

2

3

4

OP101

KPI-512

CON2-14(MANUAL)

CON2-25(EXIT)

CON2-23(FAN)

D105

1N4003

R119

2.2K

24VS

CON3

5268-03A

3

2

1

Q101

KSC1008-Y

R120

5.6K

DGND

TNR101

7D561

OPC1

53015-0510

1

2

3

4

5

CON4

CON2-16(LED-READY)

CON2-18(LED-ERROR)

CON2-21(LED-TONER SAVE)

CON2-24(KEY-DEMO))

11-16


Samsung Electronics

No results