advertisement
DIGITAL LASER MFP
SCX-4725FN Series
SCX-4725F
N/XAZ
Basic Model : SCX-4725FN
SERVICE Manual
DIGITA L LASER MFP The keynote of Product
- Machine Life: 50,000Pages
- Cpu: Chorus M
- Device Memory: 32MB
- Resolution: 1200x1200dpi
- Option: N/A
- Printing Speed: 24ppm(A4, LTR)
- Print Language: PCL
- Path Type: C-Path
- Cassette Capa.: 250sheets
- Outlet Stacking Capa.: 100sheets
- Toner Cartridge: initial(1.5K), sales(3K)
- ADF Capacity: 30sheets
- Scan Method: 600 dpi Color CIS
- Copy Speed: SDMC: 22Cpm/Ltr,
MDMC: 7Cpm/Ltr
- Interface: USB2.0
SCX-4725FN Series
Contents
1. Precautions
1.1 Safety Warning
1.2 Caution for safety
1.3 ESD Precautions
1.4 Super Capacitor or Lithium Battery Precautions
1-1
1-2
1-5
1-5
2.1 Product Overview
2.2 Specifications
2.3 Model Comparison Table
3. System Overview
3.1 System Layout
3.2 Engine H/W Specification
3.3 Deverope Process
3.4 Sanner Part
3.5 OPE(Operational Panel Equipment)
3.6 SMPS & HVPS
3.7 FUSER AC POWER CONTROL
4. Alignment and Adjustments
4.1 User Mode
4.2 Tech Mode and Setting
4.3 Control Panel
4.4 LCD Status Error Massages
4.5 Engine Test Mode
4.6 Paper Path and Clearing Paper Jams
2-1
2-2
2-8
4-1
4-4
4-13
4-15
4-17
4-19
3-1
3-5
3-12
3-13
3-15
3-16
3-18
Continued
5. Disassembly and Reassembly
5.1 General Precautions on Disassembly
5.2 MP Tray
5.3 Pick Up Roller
5.4 Front Cover
5.5 Cassette Tray
5.6 Rear Cover
5.7 Right Cover
5.8 Left Cover
5.9 Scan Ass'y
5.10 ADF Housing
5.11 OPE Unit
5.12 Platen Housing
5.13 Middle Cover
5.14 HVPS
5.15 Main PBA
5.16 RX Drive
5.17 Fuser Unit
5.18 Engine Shield (With LIU PBA, SMPS)
5.19 LSU
5.20 Paper Path Frame
5.21 CRUM Harness
6. Troubleshooting
6.1 Checking Symptoms
6.2 Bad discharge
6.3 Set Malfunction – Causes and Solutions
6.4 Bad Software Environment
6.5 Bad image
6.6 Fax & Phone Problems
5-7
5-8
5-9
5-11
5-12
5-14
5-15
5-16
5-1
5-2
5-3
5-3
5-4
5-5
5-6
5-17
5-18
5-21
5-22
5-23
5-25
6-1
6-4
6-8
6-12
6-16
6-23
Continued
6.7 Copy Problems
6.8 Scanning Problems – Causes and Solutions
6.9 Toner Cartridge Service
6.10 Software Problems – Causes and Solutions
6.11 Windows Problems
6.12 SyncThru Installation Problems
7. Exploded Views & Parts List
7.1 Main
7.2 Cover Housing
7.3 Front Cover
7.4 Rear Cover
7.5 Frame Ass'y
7.6 ADF Ass'y
7.7 Platen Cover Ass'y
7.8 Platen Ass'y
7.9 OPE Unit
7.10 RX Drive Unit
7.11 MP Tray
7.12 Fuser Unit
7.13 Paper Path Ass'y
7.14 Pick Up Unit
8.1 System Block Diagram
7-10
7-11
7-12
7-13
7-14
7-15
7-6
7-7
7-8
7-9
7-2
7-3
7-4
7-5
6-27
6-29
6-30
6-32
6-36
6-37
8-1
Continued
9. Connection Diagram
9.1 Connection Diagram
10. Reference Information
10.1 Troubleshooting Tools
10.2 Acronyms and Abbreviations
10.3 Selecting printer locations
10.4 Sample Tests Patterns
11. Circuit Description
11.1 Engine Controller
11.2 System Overview
9-1
10-1
10-2
10-4
10-5
11-1
11-7
1
1. Precautions
In order to prevent accidents and to prevent damage to the equipment please read the precautions listed below carefully before servicing the printer and follow them closely.
1.1 Safety Warning
(1) Only to be serviced by appropriately qualified service engineers.
High voltages and lasers inside this product are dangerous. This printer should only be serviced by a suitably trained and qualified service engineer.
Precautions
(2) Use only Samsung replacement parts
There are no user serviceable parts inside the printer. Do not make any unauthorized changes or additions to the printer, these could cause the printer to malfunction and create electric shock or fire hazards.
(3) Laser Safety Statement
The Printer is certified in the U.S. to conform to the requirements of DHHS 21 CFR, chapter 1 Subchapter J for
Class 1(1) laser products, and elsewhere, it is certified as a Class I laser product conforming to the requirements of IEC 825. Class I laser products are not considered to be hazardous. The laser system and printer are designed so there is never any human access to laser radiation above a Class I level during normal operation, user maintenance, or prescribed service condition.
Warning >> Never operate or service the printer with the protective cover removed from Laser/Scanner assembly. The reflected beam, although invisible, can damage your eyes. When using this product, these basic safety pre-cautions should always be followed to reduce risk of fire, electric shock, and injury to persons.
CAUTION - INVISIBLE LASER RADIATION
WHEN THIS COVER OPEN.
DO NOT OPEN THIS COVER.
VORSICHT - UNSICHTBARE LASERSTRAHLUNG,
WENN ABDECKUNG GEÖFFNET.
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 LASERSTRÅLNING VED ÅBNING, NÅR
SIKKERHEDSBRYDERE ER UDE AF FUNKTION.
UNDGÅ UDSAETTELSE FOR STRÅLNING.
ADVARSEL. - USYNLIG LASERSTRÅLNING NÅR DEKSEL
ÅPNES. STIRR IKKE INN I STRÅLEN.
UNNGÅ EKSPONERING FOR STRÅLEN.
VARNING - OSYNLIG LASERSTRÅLNING NÄR DENNA DEL
ÄR ÖPPNAD OCH SPÄRREN ÄR URKOPPLAD.
BETRAKTA EJ STRÅLEN. STRÅLEN ÄR FARLIG.
VARO! - AVATTAESSA JA SUOJALUKITUS OHITETTAESSA
OLET ALTTIINA NÄKYMÄTTÖMÄLLE LASER-
SÄTEILYLLE ÄLÄ KATSO SÄTEESEEN.
Service Manual
1-1
Samsung Electronics
Precautions
1.2 Caution for safety
1.2.1 Toxic material
This product contains toxic materials that could cause illness if ingested.
(1) If the LCD control panel is damaged it is possible for the liquid inside to leak. This liquid is toxic. Contact with the skin should be avoided, wash any splashes from eyes or skin immediately and contact your doctor. If the liquid gets into the mouth or is swallowed see a doctor immediately.
(2) Please keep toner cartridges away from children. The toner powder contained in the toner cartridge may be harmful and if swallowed you should contact a doctor.
1.2.2 Electric Shock and Fire Safety Precautions
Failure to follow the following instructions could cause electric shock or potentially cause a fire.
(1) Use only the correct voltage, failure to do so could damage the printer and potentially cause a fire or electric shock.
(2) Use only the power cable supplied with the printer. Use of an incorrectly specified cable could cause the cable to overheat and potentially cause a fire.
(3) Do not overload the power socket, this could lead to overheating of the cables inside the wall and could lead to a fire.
(4) Do not allow water or other liquids to spill into the printer, this can cause electric shock. Do not allow paper clips, pins or other foreign objects to fall into the printer these could cause a short circuit leading to an electric shock or fire hazard..
(5) Never touch the plugs on either end of the power cable with wet hands, this can cause electric shock. When servicing the printer remove the power plug from the wall socket.
(6) Use caution when inserting or removing the power connector. The power connector must be inserted completely otherwise a poor contact could cause overheating possibly leading to a fire. When removing the power connector grip it firmly and pull.
(7) Take care of the power cable. Do not allow it to become twisted, bent sharply round corners or otherwise damaged. Do not place objects on top of the power cable. If the power cable is damaged it could overheat and cause a fire or exposed cables could cause an electric shock. Replace a damaged power cable immediately, do not reuse or repair the damaged cable. Some chemicals can attack the coating on the power cable, weakening the cover or exposing cables causing fire and shock risks.
(8) Ensure that the power sockets and plugs are not cracked or broken in any way. Any such defects should be repaired immediately. Take care not to cut or damage the power cable or plugs when moving the machine.
(9) Use caution during thunder or lightening storms. Samsung recommend that this machine be disconnected from the power source when such weather conditions are expected. Do not touch the machine or the power cord if it is still connected to the wall socket in these weather conditions.
(10) Avoid damp or dusty areas, install the printer in a clean well ventilated location. Do not position the machine near a humidifier. Damp and dust build up inside the machine can lead to overheating and cause a fire.
(11) Do not position the printer in direct sunlight. This will cause the temperature inside the printer to rise possibly leading to the printer failing to work properly and in extreme conditions could lead to a fire.
(12) Do not insert any metal objects into the machine through the ventilator fan or other part of the casing, it could make contact with a high voltage conductor inside the machine and cause an electric shock.
1-2
Service Manual
Samsung Electronics
Precautions
1.2.3 Handling Precautions
The following instructions are for your own personal safety, to avoid injury and so as not to damage the printer
(1) Ensure the printer is installed on a level surface, capable of supporting its weight. Failure to do so could cause the printer to tip or fall.
(2) The printer contains many rollers, gears and fans. Take great care to ensure that you do not catch your fingers, hair or clothing in any of these rotating devices.
(3) Do not place any small metal objects, containers of water, chemicals or other liquids close to the printer which if spilled could get into the machine and cause damage or a shock or fire hazard.
(4) Do not install the machine in areas with high dust or moisture levels, beside on open window or close to a humidifier or heater. Damage could be caused to the printer in such areas.
(5) Do not place candles, burning cigarettes, etc. on the printer, these could cause a fire.
1.2.4 Assembly / Disassembly Precautions
Replace parts carefully, always use Samsung parts. Take care to note the exact location of parts and also cable routing before dismantling any part of the machine. Ensure all parts and cables are replaced correctly.
Please carry out the following procedures before dismantling the printer or replacing any parts.
(1) Check the contents of the machine memory and make a note of any user settings. These will be erased if the mainboard is replaced.
(2) Ensure that power is disconnected before servicing or replacing any electrical parts.
(3) Disconnect printer interface cables and power cables.
(4) Only use approved spare parts. Ensure that part number, product name, any voltage, current or temperature rating are correct.
(5) When removing or re-fitting any parts do not use excessive force, especially when fitting screws into plastic.
(6) Take care not to drop any small parts into the machine.
(7) Handling of the OPC Drum
- The OPC Drum can be irreparably damaged if it exposed to light.
Take care not to expose the OPC Drum either to direct sunlight or to fluorescent or incandescent room lighting. Exposure for as little as 5 mins can damage the surface’s photoconductive properties and will result in print quality degradation. Take extra care when servicing the printer. Remove the OPC Drum and store it in a black bag or other lightproof container. Take care when working with the covers(especially the top cover) open as light is admitted to the OPC area and can damage the OPC Drum.
- Take care not to scratch the green surface of OPC Drum Unit.
If the green surface of the Drum Cartridge is scratched or touched the print quality will be compromised.
Service Manual
1-3
Samsung Electronics
Precautions
1.2.5 Disregarding this warning may cause bodily injury
(1) Be careful with the high temperature part.
The fuser unit works at a high temperature. Use caution when working on the printer. Wait for the fuser to cool down before disassembly.
(2) Do not put finger or hair into the rotating parts.
When operating a printer, do not put hand or hair into the rotating parts (Paper feeding entrance, motor, fan, etc.). If do, you can get harm.
(3) When you move the printer.
This printer weighs 11.2kg including toner cartridge and cassette. Use safe lifting and handling techniques.
Back injury could be caused if you do not lift carefully.
(4) Ensure the printer is installed safely.
The printer weighs 11.2Kg, ensure the printer is installed on a level surface, capable of supporting its weight.
Failure to do so could cause the printer to tip or fall possibly causing personal injury or damaging the printer.
(5) Do not install the printer on a sloping or unstable surface. After installation, double check that the printer is stable.
1-4
Service Manual
Samsung Electronics
Precautions
1.3 ESD Precautions
Certain semiconductor devices can be easily damaged by static electricity. Such components are commonly called
“Electrostatically Sensitive (ES) Devices”, or ESDs. Examples of typical ESDs are: integrated circuits, some field effect transistors, and semiconductor “chip” components.
The techniques outlined below should be followed to help reduce the incidence of component damage caused by static electricity.
Caution >>Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
1. Immediately before handling a semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, employ a commercially available wrist strap device, which should be removed for your personal safety reasons prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ESDs, place the assembly on a conductive surface, such as aluminum or copper foil, or conductive foam, to prevent electrostatic charge buildup in the vicinity of the assembly.
3. Use only a grounded tip soldering iron to solder or desolder ESDs.
4. Use only an “anti-static” solder removal device. Some solder removal devices not classified as “anti-static” can generate electrical charges sufficient to damage ESDs.
5. Do not use Freon-propelled chemicals. When sprayed, these can generate electrical charges sufficient to damage ESDs.
6. Do not remove a replacement ESD from its protective packaging until immediately before installing it. Most replacement ESDs are packaged with all leads shorted together by conductive foam, aluminum foil, or a comparable conductive material.
7. Immediately before removing the protective shorting material from the leads of a replacement ESD, touch the protective material to the chassis or circuit assembly into which the device will be installed.
8. Maintain continuous electrical contact between the ESD and the assembly into which it will be installed, until completely plugged or soldered into the circuit.
9. Minimize bodily motions when handling unpackaged replacement ESDs. Normal motions, such as the brushing together of clothing fabric and lifting one’s foot from a carpeted floor, can generate static electricity sufficient to damage an ESD.
1.4 Super Capacitor or Lithium Battery Precautions
1. Exercise caution when replacing a super capacitor or Lithium battery. There could be a danger of explosion and subsequent operator injury and/or equipment damage if incorrectly installed.
2. Be sure to replace the battery with the same or equivalent type recommended by the manufacturer.
3. Super capacitor or Lithium batteries contain toxic substances and should not be opened, crushed, or burned for disposal.
4. Dispose of used batteries according to the manufacture’s instructions.
Service Manual
1-5
Samsung Electronics
2
2. Product Specifications
2.1 Product Overview
Item
Basic Model SCX-4725FN(4-in-1 Flatbed MFP)
SCX-4725F(4-in-1 Flatbed MFP)
Descriptions
Target User
Customer Benefits
(Sales Points)
Key Specification
SOHO, Economical(Speed/Price) Customer
- Compact Size
- 24ppm/A4, 24ppm/Letter fastest speed in its price class
- Favorite Copy
- ID Card Copy
- Toner Save
- up to 24ppm/A4(Up to 24ppm/Letter)
- 250 sheets Multi-Purpose type paper input/100 sheets Paper Output
- 3,000pages toner capacity
- 600dpi Print/Copy Resoulusion
- Samsung Print Language
- 32MB System memory
- 30 ADF
- 33.6 Kbps Fax Modem
- 100 Speed Dial
- 72 Hour Battery Back-up
Product Specifications
Remark
Samsung Electronics
Service Manual
2-1
Product Specifications
2.2 Specifications
Product Specifications are subject to change without notice. See below for product specifications.
2.2.1 General Specifications
Major Features
Item
Net Dimension (WxDxH)
Net Weight(Inc. Toner Cartridge)
CPU
LCD
Toner Save
I/O Interface
Network Interface
OS Compatibility
Power Requirement
Power Consumption
Energy Star Compliant
Power Switch
Noise Warm up
Stand by
Coping
Printing
Warm up time from Power On Status from Sleep Mode
(Recovery time)
Max. Monthly Print
Volume Scan
Average Monthly Print Volume
Average Monthly SCAN Volume
Machine Life ENGINE
Operation
SCANNER
Temperature conditions
Approval
Device Memory
Page Counter
Humidity
Print Configuration Sheet(System Data)
Descriptions (SCX-4725FN / SCX-4725F)
Copier, Print, Scan, Fax(SCX-4725FN)
438(W)*374(D)*368(H)(17.2x14.7x14.5")
11.2kg
Chorus-M (300MHz)
2 Line x 16 characters / 2Line x 8 characters(for china and korea)
Yes (With toner save button)
USB2.0
Yes
Windows 98/Me/NT4.0/2000/XP, Various Linux OS (via USB interface only) including
Red Hat 8.0~9.0, Fedora core 1~3, Mandrake 9.0~10.2, and SuSe 8.2~9.2, Mac 10.3
110 ~ 127 VAC, 50/60 Hz, 5.5A
220 ~ 240 VAC, 50/60 Hz, 3A
Sleep Mode : Under 12W
Standby Mode : 70W
Average : 400W (Print Mode)
Yes
Yes
49 dBA
35 dBA
55 dBA
53dBA
Less than 30 seconds
Less than 30 seconds
10,000 pages
ADF: 2,500 pages, PLATEN: 1,700 pages
700 pages
150 pages
5 years or 50,000 Pages. Whichever comes first
ADF : 30,000 Pages, Platen : 20,000 Pages
10°C ~ 32 °C (50°F ~ 89°F)
20 % ~ 80 % RH
Class B
32MB
Yes
Yes
2-2
Service Manual
Samsung Electronics
Product Specifications
2.2.2 Print Specifications
Item
Method
Speed
Emulation
Power Save
Resolution Normal
RET
Memory
First Print Out From Stand by
Time
Duplex
From Cold Status
WHQL Compliant
Printable Area
Halftone (Gray Scale)
Descriptions (SCX-4725FN / SCX-4725F)
Laser Beam Printing
Up to 24ppm in A4 (24ppm in Letter)
PCL
Yes(Interval option: 5, 10,15, 30, 45 minute)
1200 x 1200 dpi
-
32MB
Approx. 10 seconds
Less than 30 seconds
Manual
Window XP
A4: 201.6x288.6mm
LTR: 207.6x270.6mm
Legal: 207.6x347.6mm
Folio: 207.6x322.6mm
256 levels
2.2.3 Scan Specifications
Item
Compatibility
Scan Method
PC Scan Speed Lineart, Halftone
Scan Depth
Descriptions (SCX-4725FN / SCX-4725F)
Twain standard / WIA Standard (Window 2000/XP)
600dpi Color CIS(Contact Image Sensor) Module
10sec Platen(13sec ADF) through Platen Gray
Color 300dpi
Resolution Optical
Enhanced
Halftone
Scan Size
23sec Platen (26sec ADF)
65sec Platen(70sec ADF)
600 x 600 dpi
4800 x 4800 dpi
256 levels
Max. Document Width Max.216mm (8.5")
Effective Scan Length 297 mm (11.7")
Effective Scan Width Letter/Legal: 208mm(8.2")A4: 202mm
Scan-to Button
Application
Color
Mono
Yes
Yes
24 bit
1bit for Line art, Halftone, 8 Bit for Gray scale
Service Manual
2-3
Samsung Electronics
Product Specifications
2.2.4 Copy Specifications
Copy Speed
Resolution
First Copy
Out Time
Item
Optical
Descriptions (SCX-4725FN / SCX-4725F)
Up to 22ppm in A4 (22ppm in Letter)
600*600 dpi (Scan:600*600dpi, Print: 600*600dpi)
- Text & Text/Photo mode : 600*300dpi(ADF, Platen)
- Photo mode : 600*600dpi (Platen), 600*300dpi(ADF)
Enhanced
Stand by
-
Approx. 16 seconds(ADF), Approx. 11 seconds(Platen)
From Power Save Mode Approx. 46 seconds(ADF), Approx. 40 seconds(Platen)
(110V only)
Original Image type selection
Zoom Range
Multi Copy
Preset
Text, Text/Photo, Photo
25-400%(Platen), 25-100%(ADF)
1~99 Pages
[Original(100%)], [A4 A5(71%)], [LGL LTR(78%)], [LGL 4(83%)],
[A4 LTR(94%)], [EXE LTR(104%)], [A5 A4(141%)], 25%, 50%, 150%
200%, 400%, [Custom: 25-400%)]
Darkness Control
Auto return to default mode
Changeable Default mode
ID Card Copy 2-up
4-up
Collation
Autofit
LD Card Copy
Clone
Poster
3 level (Light, Normal, Dark)
Yes (after 1 minute)- Time out option: 15, 30, 60, 180 sec., Off
Darkness, Original Type, Reduce/Enlarge, No. of Copies
Yes (ADF Only)
Yes (ADF Only)
Yes (ADF Only)
Yes (Platen Only)
Yes (Platen Only)
Yes (Platen Only)
Yes (Platen Only)
2-4
Service Manual
Samsung Electronics
2.2.5 Telephone Specificationc
Item
Handset
On hook Dial
Search
1-Touch Dial
Speed dial
TAD I/F
Tone/Pulse
Pause
Auto Redial
Last Number Redial
Distinctive Ring
Caller ID
Extention Phone Interface
Report & List Tx/Rx Journal
Print out Confirmation
Help List
Auto Dial List
System Data
Sound Control Ring Volume
Key Volume
Alarm Volume
Speaker
SCX-4725FN
No
Yes
Yes(Phone Book)
10 ea (0~9)
90 locations(10~99)
Yes
Tone Default, Pulse Changing in Tech Mode
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
No
Yes
List all user setting
Yes(Off,Low,MED,HIGH)
Yes(On,Off)
Yes(On,Off)
Yes(On,Off, Comm)
Product Specifications
Samsung Electronics
Service Manual
2-5
Product Specifications
2.2.6 Fax Specifications
Compatibility
Modem Speed
TX Speed
Compression
Color Fax
ECM
Resolution
Item
Std
Fine
S.Fine
Photo
Color
Auto Switching
Scan Speed Standard
SCX-4725FN
ITU-T G3
33.6Kbps
3sec
MH/MR/MMR/JBIG
Yes(Tx Only)
Yes
203x98dpi
203x196dpi
300x300dpi
203x196dpi
200x200dpi
Yes approx. 3sec (ADF) approx. 5sec (Platen) approx. 7sec (ADF) Fine
S.Fine
Rx fax duplex print out
Multiple page scan speed
(Memory Tx.)
Receive Mode
Memory Capacity approx. 8sec (Platen) approx. 7sec (ADF) approx. 8sec (Platen)
No
7 cpm / Ltr (Standard Resoution Res.)
Fax, TEL, Ans/Fax, DRPD
2MB (When Power off Memory Back up)
Optional Memory No
Max locations to store 99 locations to 1 Group Dial
Fax Forward Yes(On/Off)
Functions
Broadcasting
Cover page
Delayed fax
Memory RX
Voice Request
TTI
RTI
Polling
Earth/Recall
Auto Reduction
Junk Fax barrier
RDS
Security Receive
Memory Back-up
109 locations(Max locations)
N o
Yes
Yes
No
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Max. 72hours
2-6
Service Manual
Samsung Electronics
Product Specifications
2.2.7 Paper Handling Specifications
Item
Input Capacity and Types
Output Capacity and Types
Manual Tray
Media size
Media Type
Paper Weight
ADF Capacity
ADF Document Size
SCX-4725FN / SCX-4725F
250-sheet Cassette Tray (75 g/ , 20 lbs)
100-sheet Face Down(75 g/ , 20 lbs)
1 sheet
A4, A5, A6, Letter, Legal, Folio, Executive, ISO B5, JIS B5, Monarch, Envelope, No.10, DL, C5, C6
76 x 127 mm (3" x 5") ~ 216 x 356 mm (8.5" x 14")
Plain Paper, Transparency, Label, Envelope, Tick, Thin, Bond, Color Paper, Card Stock, Preprinted
16~24lb (60 to 90g/ ), Cassette Tray
16~43lb (60 to 165g/ ) for 1 sheet, Manual Tray
Up to 30 sheets of 20lb(75g/ ) paper
Up to Legal
2.2.8 Software
Item
Compatibility DOS
Win 3.x
Win 95
Win 98/ME
Win NT 4.0
Win 2000
Driver
Application
Win XP
Mac
Linux
Printer
TWAIN
WIA
ScanToPC
PC-FAX
RCP
Status monitor
SmarThru4
No
No
No
Yes
No
Yes
Yes
Yes (10.3 )
Yes
PCL
Yes
Yes
Yes
Yes (Send only)
Yes
Yes
Yes
SCX-4725FN / SCX-4725F
Service Manual
2-7
Samsung Electronics
Product Specifications
2.2.9 Accessory
Items
Quick Setup Guide
Quick User Guide
S/W CD ROM
Toner Cartridge
Power Cable
Telephone Jack
Printer Cable
Tray Coner
SCX-4725FN SCX-4725F
Yes (include Setup Guide and Function Guide)
Yes (Korea Only)
3 CD (Contents; Electronic User Manual, SmarThru, Print Driver, Twain Driver, RCP)
1 EA
1 EA
No 1 EA
No
Yes
No
Yes
2.2.10 Consumables
Item
Type
How to install
Toner Yield
Code
Level Sensor
SCX-4725FN / SCX-4725F
Single Cartridge
Front door open and front loading
3,000 pages at ISO 19752 Std.
Coverage(Ships with 1,000 pages Starter Toner Cartridge)
SCX-4525D3
-
2-8
Service Manual
Samsung Electronics
2.3 Model Comparison Table
Product Specifications
Samsung Electronics
Service Manual
2-9
System Overview
3
3. System Overview
3.1 System Layout
The SCX-4725FN/4725F is roughly made up Main Control part, Operation Panel part, Scanner part, Line
Interface part and Power part. Each Part is separated Module which focus on common and standard design of different kind products. main control part adopting Fax & LBP Printer exclusive Controller is chorus-M
CPU(ASIC) and 1 Board. Scanner part is composed of ADF and Platen and is connected with Main by
Harness.
Samsung Electronics
Service Manual
3-1
System Overview
3.1.1 Feeding section
There is a universal cassette which automatically loads paper and the manual feed which supplies paper single sheet at a time. The cassette has a friction pad which separates paper to ensure single sheet feeding, and it has a sensor, which checks when the paper tray is empty.
- Feeding Method: MP Cassette Type
- Feeding Standard: Center Loading
- Feeding Capacity: Cassette-150 sheets (75g/m2, 20lb paper standard)
Manual 1 sheet (Paper, OHP, Envelop, etc.)
- Paper detecting sensor: Photo sensor
- Paper size sensor: None
3.1.2 Transfer Ass’y
This consists of the PTL (pre-transfer lamp) and the Transfer Roller. The PTL shines a light onto the OPC drum. This lowers the charge on the drum’s surface and improves transfer efficiency.
The transfer roller transfers toner from the OPC drum surface to the paper.
- Life expectancy: Over 50,000 sheets (at 16~30°C)
3.1.3 Driver Ass’y
- Gear driven power unit. The motor supplies power to the paper feed unit, the fuser unit, and the toner cartridge.
3.1.4 Fixing Part(Fuser)
- The fuser consists of the Heat Lamp, Heat Roller, Pressure Roller, Thermistor, and Thermostat. It fixes toner to the paper using pressure and heat to complete the printing job.
3.1.4.1 Temperature-Intercepting Device (Thermostat)
The thermostat is a temperature sensing device, which cuts off the power to the heat lamp to prevent overheating fire when the heat lamp or heat roller overheats.
3.1.4.2 Temperature Detecting Sensor (Thermistor)
The Thermistor detects the surface temperature of the heat roller, this information is sent to the main processor which uses this information to regulate the temperature of the heat roller.
3.1.4.3 Heat Roller
The surface of the Heat Roller is heated by the Heat Lamp. As the paper passes between the Heat and
Pressure rollers the toner is melted and fixed permanently to the paper. The surface of the roller is coated with Teflon. This ensures that toner does not adhere to the roller surface.
3-2
Service Manual
Samsung Electronics
System Overview
3.1.4.4 Pressure roller
The Pressure Roller mounted under the heat roller, it is made of a silicon resin, and the surface of the roller is coated with Teflon. This ensures that toner does not adhere to the roller surface.
3.1.4.5 Safety Features
• To prevent overheating
- 1st protection device: Hardware cuts off when overheated
- 2nd protection device: Software cuts off when overheated
- 3rd protection device: Thermostat cuts off mains power to the lamp.
• Safety device
- Fuser power is cut off when the front cover is opened
- LSU power is cut off when the front cover is opened
- The temperature of the fuser cover's surface is maintained at less than 80°C to protect the user and a caution label is attached where the customer can see it easily when the rear cover is opened.
Samsung Electronics
Service Manual
3-3
System Overview
[Case part figure]
COVER-M_MIDDLE
COVER-M_JAM
STACKER
COVER-M-SIDE R
EXTEND-SMALL
EXTEND-LARGE
COVER-M_REAR
COVER-M-SIDE-L
[Scan part figure]
SCAN
UPPER
ADF
GLASS
SCAN
GLASS
KEY & OPE
COVER
FIXING BKT
SPEKER
COVER-M_DEVE
TRAY CASSETTE
MOTOR
ASS'Y
CIS
SCAN
LOWER
TIMING
BELT
SLIDER
-CIS
3-4
Service Manual
Samsung Electronics
System Overview
3.2 Engine H/W Specification
1) Recording Method : LSU(Laser Scanning Unit)
2) Printing Speed : 24ppm
(In continuing printing base Letter, printing pages from 2nd to last during 1min)
3) Recording Density : 1200 dpi
4) Cassette Capa. : Cassette ; 250sheets(75g/ Base), 1-sheet Feeding : N/A((DRIVE Selection : Paper, OHP,
Envelop - 1 sheet)
5) Manual Tray : All paper 1 sheet
6) Paper Size : Cassette ,Manual ; Width = 76 ~ 216mm, Length = 125mm ~ 356mm
7) Effective recording size
- A4 :202 x 291 mm
- Letter : 208 x273mm
- Legal : 208 x 350 mm
- Folio : 208 x 325 mm
- TopMargin: 2 2 mm
- Left, Right Margin : 2 2 mm
8) CRU(Toner Cartridge)Life : 3,000pages Printing(A4, ISO Standard Pattern Printing)
9) First Print Out Time : within 11sec ( Standby )
10) Warming up time : within 35sec (Ambient : 25 °C)
3.2.1 Main Board Control Part
Main control part of SCX-4725FN is made of ASIC(CPU, Image processor, PC I/F part include, Scan interface part,
FAX Modem part and Printing process I/F part. CPU handles the BUS control, I/O interface, scan interface, PC interface and other miscellaneous driver circuit.
1) Main Board
- Main Board has a function of sending Current Image Video Data to LSU of the machine, controlling motor
Driving Circuit and monitoring Paper Exit Sensor, Cover Open switch, OPE Panel Inputs.
2) Main Controller
- CPU : Chorus-M is the main CPU and is made up on the 32bit RISC architecture using ARM 920T core.
Main CPU controls the whole system according to the program code which stored in the Flash-
ROM memory.
- Operation Frequency : CPU Core -> over 300MHz, System Bus -> 100MHz
- Summary of the Key Function Block:
1.3V for internal Core, 3.3V for I/O Pad with 16KB I-Cache and 16KB D-Cache.
Image Processor included.
On-Chip clock generator with PLL.
Memory and External Bank Control.
DMA Control (16-Channel)
Interrupt Control.
2-port USB Host/1-port USB device(ver 1.1) interface control.
Parallel interface control.
UART(1-Channel)
Service Manual
3-5
Samsung Electronics
System Overview
Synchronous Serial Interface Control.
A/D Converter(10-bit, 8channel).
General I/O Port control.
RTC with calendar function.
S/W Assistant function(Rotator)
- Flash Memory : Stores system program and can be updated to the newer system program code through the PC interface. It stores the FAX Journal List, One Touch dial number, speed dial number, and machine configuration setup data.
Capcity : 16 Mbyte (NOR Type)
Access Time : 70 nsec
- SDRAM : SDRAM is used for Print Buffer, Scan buffer when scanning, ECM Buffer when FAX Receiving, and system working memory.
Capacity : 32 Mbyte
Access Time : 166MHz(Max)
Data Backup : 48 Hours
Backup Battery Charging Time : 100hours when completely discharged.
3.2.2 Scan Part
1) Image Signal Input Part
- Image Signal from CIS has a level of about 1.2V and is goes to ADC of Chorus2.
After ADC, CIS analog signal will be converted to 8-bit Digital signal.
2) Image Processing
- On the surface of the original paper, the light from the CIS LED reflected and goes to the CIS Sensor.
Then the light is converted to the appropriate voltage suitable for ADC input. Analog signal from CIS sensor is used for ADC input then is converted to 8-bit digital data. Image processor of the Chorus2 will do the Shading correction function at first, then Gamma correction function next. After then, the data goes to different module according to the copy or FAX resolution mode. When Text mode, the image data goes to LAT module, when Photo mode, the image data goes to Error Diffusion module, when PC-Scan mode, the image data goes directly to the PC through DMA access.
3) CIS Driving Part
Summary of the Image sensor interface is as below;
- Minimum Scan Line Time :1.5ms
- Scan Resolution : 600*600 dpi
- Scan Width : 208mm
- Function
White Shading Correction
Gamma Correction
CIS Interface
256 Gray Scale
3-6
Service Manual
Samsung Electronics
- CIS Supply Voltage : +3.3V
- CIS Max frequency : 5MHz
- CISLinetime
Fax/Copy - 1.5ms
PC-Scan - 4.5ms
- White output volt. : Max 0.8V
4) ADF Driving Part : Driving ADF Stepper motor, and the maximum motor speed is 2000PPS.
- MOTOR DRIVER : A3978(Allegro)
- Driving Voltage : 24V DC
- Phase : 2-2 Phase 2000PPS at Quick Scan,
2-2 Phase 1000PPS AT Fine Scan,
2-2 Phase 667PPS AT Super Fine Scan
3.2.3 FAX Section
Modem Part
BLOCK DIAGRAM
System Overview
Implemented by based on Conexant DAA (Data Access Arrangement) Solution, and is roughly composed of two kinds
Chip Solution
- CX86710 (SFX336): Existing Modem Chip which adds SSD (System Side Device) for interfacing between LSD and DIB of FM336Plus Core
- CX20493 (LSD) : LIU (Line Interface Unit) Chip which is controlled by SSD and satisfies each PSTN Requirements by modulating internal Configuration with connecting Tel Line.
Service Manual
3-7
Samsung Electronics
System Overview
Modem (SFX336) specification.
2-wire half-duplex fax modem modes with send and receive data rates up to 33,600 bps
V.17, V.34, V.29, V.27 ter, and V.21 Channel 2
Short train option in V.17 and V.27 ter
PSTN session starting
V.8 and V.8bis signaling
HDLC support at all speeds
Flag generation, 0-bit stuffing, ITU CRC-16 or CRC-32 calculation and generation
Flag detection, 0-bit deletion, ITU CRC-16 or CRC-32 check sum error detection
FSK flag pattern detection during high-speed receiving
Tone modes and features
Programmable single or dual tone generation
DTMF receiver
Tone detection with three programmable tone detectors
Receive dynamic range:
0 dBm to -43 dBm for V.17, V.29, V.27 ter and V.21 Channel 2
9dBm to -43 dBm for V.34 half-duplex
Digital speaker output to monitor received signal
Two16-byte FIFO data buffers for burst data transfer with extension up to 255 bytes
V.21 Channel 1Flag detect
V.21 Channel 1Flag detect
+3.3V only operation
Typical power consumption
Normal mode: 264 mW
3-8
Service Manual
Samsung Electronics
System Overview
Signal Transition of DAA Solution
Line Interface Signal of Tel Line and LSD is Analog Signal.
2) there is A/D, D/A Converter in LSD, so Analog Signal from Tel Line is converted in Digital through A/D Converter in
DAA and transfer to SSD by DIB Capacitor
Digital Signal from SSD is converted to Analog by D/A Converter in DAA and transfer to Tel Line
Transformer transfer Clock from SSD to LSD and Clock Frequency is 4.032MHz.
LSD full wave rectifies Clock to use as inner Power supply and also use as Main Clock for DIB Protocol Sync between
LSD and SSD. Transformer transfer Clock by separating Primary and Secondary, and amplifies Clock Level to LSD by Coil Turns Ratio 1:1.16.
Clock
- Clock is supplied by transformer from SSD to LSD, and there is PWROUT to adjust output impedance of Clock
Out Driver is inside SSD and CLKSHIGH Resistor to adjust duty of HLPWR Resistor and Clock.
SSD
CLKP
CLKN
DIBP
DIBN
LSD
Clock from SSD to LSD has Differential structure of 180 phase difference for Noise Robustness
DIB Data transfer Data from SSD to LSD by Transformer, and also transfer specific data from LSD to SSD.
After transferring data from SSD, RSP is transferred and LSD recognizes RSP and change LSD to output Driver transfer
Data to SSD.
DIB Data form SSD to LSD by Transformer has Differential structure of 180 phase difference between DIBP and DIBN for
Noise Robustness
Service Manual
3-9
Samsung Electronics
System Overview
3.2.4 Line Interface Part
This is Connection Part between system and PSTN(Public Switched Telephone Network), and primary circuit is usually located. Main functions are Line Interface, Telephone Connection and Line Condition Monitoring.
1 Telephone Line Connection
Modular Plug : RJ-11C
LIU PBA Modular Type : 623 PCB4-4
Line Code Length : 2500 50mm
Line Code Color : Black
ON HOOK state Characteristic
1) DC Resistance
DP Dial Mode (Direct Current 30mA) : 50 ~ 300ohm
DTMF Dial Mode (Direct Current 20mA) : 50 ~ 540ohm
2) Ring Sensitivity
Ring detection Voltage : 40Vrms 150Vrms (condition :Current=25mA,Frequency=15Hz) product Margin : 30Vrms 150Vrms
Ring detection Frequency : 15.3Hz 68Hz (condition : Voltage=45Vrms,Current=25mA ) product Margin : 15Hz 70Hz
Ring detection Current : 20mA 100mA (condition : Voltage=40Vrms,Frequency=20Hz) product Margin : over 15mA
3) False Ring Sound
Ring Frequency : 750 Hz + 1020 Hz
Ring interrupt Cycle : On/Off depending on input Ring Signal Cycle.
3-10
Service Manual
Samsung Electronics
System Overview
3.2.5 Printing Process Part
Printing Process part is made of PC-Interface part, PVC(Priter Video Controller), LSU control part, High Voltage control part and Fuser Unit control part. PC-interface core is included in the Chorus2 ASIC and controls the PCinterface. LSU control part controls the LSU polygon motor, Laser diode, video data output so thatthe printing image can be made up on the OPC Drum.
3.2.6 Engine Paper Feeding
1) Feeding Type : MP Cassette Type
2) Feeding Standard : Center Loading
3) Feeding Qty : Cassette 150 sheets (75g/ , 20lb paper standard)
4) 1 sheet (Paper, OHP, Envelope etc.)
5) Separating Type: Cassette - Friction Pad Type
6) Manual Tray : 1 sheet
7) Driver Type : Driving by Gearing from Main Motor
8) Pick_up Roller Driver : Solenoid
9) Pick up Roller Rubber Material : EPDM+IR =1.3 or more
10) Pick up Velocity : 94.8731mm/Sec (Process : 93.0667mm/sec)
11) Paper detecting Sensor : Photo Sensor
12) Paper Size Sensor : None
13) Paper Separating Pad Material : NBB 52 °, =0.8~1.2
14) Separating Pad Pressure : TBD 150 gf
15) Pick_up Roller RPM : 47.683 RPM
16) Feeding Pressure (Same as Transfer Roller)
17) Paper Exit Type : Face Down
18) Feed Roller Force : TBD Kg.f or more.
19) Spring Feed Tensile Force : TBD gf
20) Feed roller Velocity : mm/sec
21) Feed Roller Material
22) Exit Sensor : Photo Sensor
Service Manual
3-11
Samsung Electronics
System Overview
3.3 Deve
l
ope Process
- Developing Method : Non magnetic 1 element contacting method
- Toner : Non magnetic 1 element shatter type toner
- Toner Qty:35gf /60gf (1k/3k)
- The life span of toner 1k/3k sheets (ISO Standard Coverage )
- Toner Residual Sensor : None
- OPC Cleaning : Use the conventional cleaning blade
- Handling of wasted toner : Discard by collecting waste-toner at waste-toner bin.
- OPC Drum Protecting Shutter : None
- Classifying device for toner cartridge: ID is classified by interruption of the frame channel.
- Development Roller type : conductive elastic roller
- Doctor BLADE Type : Regulating toner layer by pressure
- Charge Roller Type : Conductive Roller Contact-Charge
3.3.1 Fuser Specification
1) Heat Lamp
- Heat Lamp Terminal Shape : Terminal Single Type
- Voltage 120 V : 115 5 %, 220 V : 230 5 %
- Capacity : 750 Watt 30 W
- Light Qty Distribution : 140%
- Life : 3000 Hr
2) Thermostat
- Thermostat Type : Non-Contact type THERMOSTAT
- Control Temperature : 150°C 5°C
3) Thermistor
- Thermistor Type : HF-R0060 (SEMITEC 364FL Type)
- Temperature Resistance : 7 k (180 °C)
- SYSTEM Temperature SETTING
Stand by : 165 5°C
Printing : 175 5°C(5 minutes before)
170°C 5°C(5 minutes after)
Overshoot: 200°C or less
Overheat :210°C or less
4) Safety Relevant Facts
- Protecting device when overheating
1st protecting device : H/W cuts off when detecting an overheating
2st protecting device : S/W cuts off when detecting overheating
3st protecting device : Thermostat cuts off the power
- Safety device
The power of Fuser is cut-off after front cover is open.
The overheating safety device for customer
The surface temperature of the Fuser Cover is under 80°C
3-12
Service Manual
Samsung Electronics
System Overview
3.4 Sanner Part
600dpi Color CIS Module for Flat bed, SCX-4725FN uses the CIS scanning method
1) CIS SPEC
- Scanning size : 216 mm ( width for letter-size)
- Light source : LED
- Scanning sensor: CIS 600/300 dpi
- Scanning mode : Color SCAN / Mono SCAN
- MTF : 30% (300 dpi Chart)
- CIS interface : Analog output
- Power supply : 3.3V
- Clock Frequency: 5.5MHz max.
- Number of output : 1
- LED Current : Green/Blue : 50mA, Red : 60mA
- Clamp Level : 1.4V
- Connection : 12 pin FFC connector (pitch 1.0mm)
2) Scan Resolution
(a) Transmission
- Normal : Vertial: 3.85 Line/mm, Horizontal: 8 Pels/mm :203 x 98dpi
- Fine : Vertial: 7.7 Line/mm, Horizontal: 8 Pels/mm :203 x 196dpi
- Super Fine : Vertial: 11.8 Line/mm, Horizontal: 11.8 Pels/mm ;300 x 300dpi
(b) When Copy : Vertial: 11.8 Line/mm, Horizontal: 23.6 Pels/mm :600x300dpi(ADF)
Vertial: 23.6 Line/mm, Horizontal: 23.6 Pels/mm :600x600dpi(Platen)
3) Half Tone (Gray Scale) : 256 Levels
4) Scan Line Time
(a) Tx
- Normal : 1.5 ms/Line
- Fine : 1.5 ms/Line
- Super Fine : 1.5 ms/Line
(b) Copy : 1.5 ms/Line
(c) Scan
- Color : 4.5msec/line
- Gray : 4.5msec/line
- Mono : 4.5msec/line
5) Scanning Width
- MAX SCAN WIDTH : 216 mm (8.5 inches)
- Effective Scan Width: 208mm
6) ADF Motor
(a) Motor Spec
-
-
: 24VDC
: 0.6A(Peak)
Samsung Electronics
Service Manual
3-13
System Overview
7) Motor Driver speed & method
(a) FAX Transmission
- Normal Mode : 2000 pps, 2-2
- Fine Mode : 1000 pps, 2-2
- Super Fine Mode : 667 pps, 2-2
(b) Copy Job : 667 pps, 2-2
- max(30sheets) : 50gf
- min(1sheets) : 20gf
8) Document Detect sensor
(a) Type : Photo interrupt
(b) Position : ADF PBA
(c) LED - max current : 30mA
- max voltage : 3.3V
(d) Output - Logic "H" : No Paper
- Logic "L" : Paper
(e) Lever-Sensor DOC : ADF Lower Torsion Spring
9) Regi Detect sensor
(a) Type : Photo interrupt
(b) Position : ADF PBA
(c) LED - max current : 50mA
- max voltage : 3.3V
(d) Output - Logic "H" : No Paper
- Logic "L" : Paper
(e) Lever-Sensor DOC : ADF Lower Torsion Spring
10) Document Scan sensor
(a) Type : Photo interrupt
(b) Position : ADF PBA
(c) LED : - Max current : 50mA
- Max Voltage : 3.3V
(d) Output - Logic "H" : Off(No Position), No Paper
- Logic "L" : On (Doc Position), Paper
(e) LEVER - SENSOR SCAN : Scan Lower Torsion Spring
3-14
Service Manual
Samsung Electronics
System Overview
3.5 OPE(Operational Panel Equipment)
1) Ope Panel
OPE Panel has a MICOM Chip on it and communicates with Main CPU using Serial communication
Line(SIO). OPE Panel consists of Micom, Key Matrix Part, LED Driving Part and LCD Part.
2) Key Description
No Part
1 Common
Feature
3*4Key
Start
Stop/Clear
Function
Dialing and Option Input
Starting Fax/Copy Job
Cancel Current Job/Return to default
Upper Level
2 Save
3 Copy
4 Fax
5 Scan
Toner Save
Reduce/Enlarge
No.of Copies
Original Type
Darkness
Favorite Copy
Resolution
Phone Book
Broadcasting
On Hook Dial
Redial / Pause
Scan to
Return to upper level menu
Next menu or Next option item
Previous menu or Previous option item
TONER SAVE MODE select
Select ZOOM ratio when copy
Select the number of copies
Change Copy Modes(Text,Text/Photo,Photo)
Change the Darkness of the Copied image (Light/Normal/Dark)
Select one of the predefined Copy templates.
STANDARD>FINE>SUPER
FINE>PHOTO>COLOR
Search the user defined Phone number.
When sending FAX data to many place in the same time.
On Hook Dial
Last number Redial / Pause select [scan to PC], [scan to FAX], [scan to E-mail] function.
3) LCD Part
- Number of Characters : 16 Characters x 2 line
Clock, Date display
System Status display
Alarm, Error Message display
Function Dialog Message display
Service Manual
3-15
Samsung Electronics
System Overview
3.6 SMPS & HVPS
It is the power source of entire system. It is assembled by an independent module, so it is possible to use for common use. It is mounted at back of the machine. Power part is divided by two independent PBAs - SMPS PBA and HVPS PBA. SMPS PBA supplies the DC power for driving the system and supplies the AC power to the fuser.
SMPS has two output channels : +5V and +24V. HVPS PBA supplies High voltage to the developer part to make a printing image on the paper. High voltages applied to the MHV, THV, DEV, SUPPLY.
3.6.1 SMPS
1) AC Input
- Input Rated Voltage : AC 220V ~ 240V / AC 110V ~ 127V
- Input Voltage fluctuating range: AC 180V ~ 270V / AC 100V ~ 135V
- Rated Frequency : 50/60 Hz
- Frequency fluctuating range : 47 ~ 63 Hz
- Input Current : Under 4.0Arms / 2.5Arms
(But, the status when lamp is off or rated voltage is inputted/outputted )
2) Rated Output Power
NO Items
1 CHANNEL
CH1
+5V
3 Rated Output
4 Max. Output current
5V PIN : #5pin
GND PIN: #6pin
+5V ± 5%(4.75 ~ 5.25V)
0.8 A
5 Peak Loading current 1.0 A
6 RIPPLE NOISE Voltage 100mVp-p or less
9 Protection for loading shortage and overflowing current
CH2
+24.0V
CON 2
24V PIN: #2, #3, #4
GND PIN: #7pin
+24V -10%/+15%(21.6V ~ 27.6V)
2.5 A
2.7 A
500mVp-p or less
2.5W
4W
36W
55.2W
Fuse Protection or Shutdown Fuse Protection or Shutdown within 1.5A ~ 3.0A range.
within 3.5A ~ 4.5A range.
Remarks
Jam cover switch included within 1ms Duration
1ms
3) Consumption Power
NO Item CH1(+5V)
1
2
3
Stand-By
Printing
Sleep-Mode
0.6 A
0.8 A
0.5 A
1.3 A
1.9 A
0.3 A
AVG : 70Wh
AVG : 400Wh
AVG : 12Wh
3-16
Service Manual
Samsung Electronics
System Overview
4) Power Cord Length : 1830 50mm
5) Power Cord Switch : Exist
6) Feature
- Withstand Resistance : 100 or more (at DC 500V)
- Insulating revisiting pressure : Must be no problem within 1 min. (at1000Vac,10mA)
- Leaking Current : under 3.5mA
- Running Current : under 40A PEAK (AT 25 °C,COLDSTART) under 50A PEAK (In other conditions)
- Rising Time : within 2Sec
- FallingTime : over 20ms
- Surge : Ring Wave 6KV-500A (Normal, Common)
7) Environment Condition
- Operating temperature range : 0 °C ~ 40 °C
- Maintaining temperature range : -20 °C ~ 40 °C
- Preserving Humidity Condition : 10% ~ 90% RH
- Operating atmospheric pressure range : 1atm
8) EMI Requirement : CISPR, FCC, CE, MIC,
9) Safety Requirement : IEC950 UL1950, CSA950, C-UL, Semko, EK, CB, CCC(CCIB),GOST, EPA,
3.6.2 HVPS Board
The HVPS board creates the high voltage of THV/MHV/Supply/Dev and supplies them to the developer part for making best quality printing image. The HVPS part takes the 24V and outputs the high voltage such as
THV/MHV/Supply/Dev, and the outputted high voltage is supplied to the toner, OPC cartridge, and transfer roller.
(a) Transfer High Voltage (THV+)
- Input Voltage : 24 V DC +15% / -10% (21.6V~27.6V)
- Out Voltage : +1300KV 1.5% (200 Load )
- Out Voltage Trigger : 6.5
- Input Voltage Variation : 5 %
Load Variation : 5 %
- Out Voltage Rising Time : 100 ms Max
- Out VoltageFalling Time : 100 ms Max
- Transfer Variation Voltage on Environment Variation : +500 V ~ +5000V
- Control Method on environment : THV-PWM ACTIVE, transfer Active signal, of environment sensing voltage is input and get feed back current, and recalculate it to resistance .
- Control method on transfer output voltage : It is controlled by changing its duty of THVPWM Signal as follows. 10% Duty : +500V, 90% Duty : +5000V
(b) Charge Voltage (MHV)
- Input Voltage : 24 V DC +15% / -10% (21.6V~27.6V)
- Out Voltage : -1300KV 50V(50 Load)
- Out Voltage Rising Time : 50 ms Max
- Out VoltageFalling Time : 50msMax
- Out Voltage Range : 30 ~ 1000
- Output Control Signal(MHV-PWM) : Active Low PWM signal for controlling MHV
Service Manual
3-17
Samsung Electronics
System Overview
(c)Developing Voltage (DEV)
- Input Voltage : 24V DC +15% / -10% (21.6V~27.6V)
- Output Voltage: -350V 20V (50 Load)
- Output Voltage Fluctuation range: PWM Control
- Input contrast of the output stability degree : 5 %orless
- Loading contrast : 5 %orless
- Output Voltage Rising Time : 50 ms Max
- Output Voltage Falling Time : 50 ms Max
- Output Loading range : 10 ~1000
- Output Control Signal (BIAS-PWM) : Active Low PWM signal for controlling MHV
(d) Supply
- Output Voltage : -550V 50V(50 Load)
- Input contrast of the output stability degree : under 5 %
- Loading contrast : 5 %orless
- Output Voltage Rising Time : 50 ms Max
- Output Voltage Falling Time : 50 ms Max
- Output Loading range : 10 ~ 1000
- Output Control Signal (BIAS-PWM) : Active Low PWM signal for controlling MHV
3.7 FUSER AC POWER CONTROL
The 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 Phototriac
(insulting part). In other words, the AC control part is passive circuit, so it turns the heater on/off with taking signal from engine control part.
When the 'HEATERON' signal is turned on at engine,the LED of PC102 (Photo Triac) takes the voltage and flashes. From the flashing light, the Triac part (light receiving part) takes the voltage,and the voltage is supplied to the gate of Triac and flows into the Triac. As a result, the AC current flows in the heat lamp, and heat is occurred.
On the other hand, when the signal is off, the PC102 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 feature : 16A, 600V SWITCHING
2) Phototriac Coupler (PC102)
- Turn OnIf Current : 15mA~50mA(Design : 16mA)
- High Repetive Peak Off State Voltage : Min 600V
3-18
Service Manual
Samsung Electronics
Alignment and Adjustments
4
4. Alignment and Adjustments
4.1 User Mode
The table below shows the map of User settings available in User Mode. These are fully described in the
User Guide and are not included here.
Default Value 1st level
RETURN -left/right && Enter --
1. Paper Setting
Paper Type
1
14 character
Paper Type
2.Machine Setup
Machine ID
2 Paper Size
1
2
3
4
Machine ID
(Only SCX-4521F)
Date & Time
(only SCX-4521F)
Clock Mode
(only SCX-4521F)
Language
2nd level
RETURN left/right && Enter
Plain Paper, Thick, Thin,
Bond, Colored, Card stock, Labels, Transparency,
Envelope, Preprinted
A4, Legal, Executive, Folio
A5, B5, A6, Letter
Fax:
ID:
00-00-0000
00:00(AM)
12, 24 hours
3rd level
[English/FRANCAIS/Espanol/
Portugues/Deutsch/Italiano/
Pycckn/Norsk/Polski/Suomi/
Magyar/Dansk/Solvencina cestina/Svenska/Turkse
- 16 language
On
Off
On
Off
5, 10, 15, 30, 45 min.
Plain Paper
By Country
12hours
English
5 5 Power Save
6 Ignore Toner
7 Select Country
Service Manual
4-1
Samsung Electronics
Alignment and Adjustments
1st level
RETURN -left/right && Enter --
3.Copy Setup
Default-Change
1
14 character
Default-Change
4. Fax Setup
(only SCX-4725FN)
Receive Mode
5. Fax Feature
Delay Fax
6. Advanced fax
Toll Save
12
1
2
3
8
9
10
11
4
1
2
6
7
4
5
2
3
2
1
Timeout
Receive Mode
Ring to Answer
Darkness
Redial Term
Redials
MSG Confirm
Image TCR
Auto Report
Auto Reduction
Discard Size
RCV Start Code
DRPD Mode
Delay Fax
Priority Fax
Add Page
Cancel Job
Toll Save
Junk Fax Setup
7. Reports
Phone Book
3
4
1
2
5
6
3
4
5
6
7
Secure Receive
Prefix Dial
Stamp RCV Name
ECM Mode
Phone Book
Sent Report
RCV Report
System Data
Scheduled Jobs
MSG Confirm
Junk Fax List 10 ea
2nd level
RETURN left/right && Enter
Darkness
Original Type
Reduce/Enlarge
No. of Copies
Off. 15,30,60,120Sec, Off
Fax, Tel, Ans/Fax
1~7
Light/Normal/Dark
1~15Min
1~13times
On, Off, On-Error
On, Off
On, Off
On, Off
0~30mm
0~9 set
Enter Number
Enter Number
Operation Not Assigned
Operation Not Assigned
On,Off
On
Off
On,Off, Print
FAX: xxxxx (5 digits)
On, Off
On, Off
3rd level
Light/Normal/Dark
Text, Text/Photo, Photo
[Original(100%)]
[LGL LTR(78%)]
[LGL A4(83%)]
[A4 A5](71%)]
[A4 LTR(94%)]
[EXE LTR(104%)]
[A5 A4](141%)]
25%
50%
150%
200%
400%
[Custom:25-400]
[1-99]
Start Time/ End Time
Fax:
Default Value
Normal
Text
100%
Off
Off
Off
Off
On
1
30sec
2
Normal
3minutes
2times
On-Error
On
On
20mm
*9*
4-2
Service Manual
Samsung Electronics
Alignment and Adjustments
<continue..>
1st level
RETURN -left/right && Enter --
8. Network Setup
(only SCX-4725FN)
Reset Network
9. Sound/Volume
Speaker
0. Maintenance
Clean Drum
3
4
1
2
3
4
1
2
3
4
1
2
14 character
Reset Network
Config Network
Set to Default
Print Net CFG
Speaker
Key Sound
Alarm Sound
Clean Drum
Auto Cleaning
Notify Toner
Clear Memory
2nd level
RETURN left/right && Enter
Yes, No
TCP/IP, Ether Talk
Yes, No
Yes, No
On, Off, Comm.
On, Off
On, Off
Yes, No
On, Off
All Settings
Clear All Mem.
Paper setting
Copy Setup
Fax Setup
Fax Feature
Advanced Fax
Sent Report
RCV Report
Phone Book
3rd level
Manual, DHCP, BOOTP
Default Value
Comm.
Med
Off
On
Off
Off
Off
Samsung Electronics
Service Manual
4-3
Alignment and Adjustments
4.2 Tech Mode and Setting
4.2.1 How to Enter Tech Mode
In service (tech) mode the technician can check the machine and perform various tests to help with failure diagnosis.
When in Tech mode the machine still performs all normal operations.
To enter the Tech mode (SCX-4725FN)
To enter the Tech mode press briefly displays ‘TECH’, the machine has entered service (tech) mode. in sequence and the LCD
To enter the Tech mode (SCX-4725F)
To enter the Tech mode press in sequence and the LCD briefly displays ‘TECH’, the machine has entered service (tech) mode.
4-4
Service Manual
Samsung Electronics
Alignment and Adjustments
4.2.2 Setting-up System in Tech Mode
1st level
RETURN -left/right && Enter --
Tech Mode
Data Setup
1
14 character
Data Setup
2
Machine Test
3
Report
Clear All Mem.
Clear Count
Flash Upgrade
Silence Time
Ignore Toner
Test Param Set
Switch Test
Modem Test
Dram Test
Rom Test
Pattern Test
Shading Test
Protocol
System Data
Error Info
2nd level
RETURN left/right && Enter
Send Level
Modem Speed
Error Rate
Notify Toner
3rd level Default Value
09-15 -12
33.6, 28.8, 14.4, 12.0, 9.6, 4.8
33.6
5%, 10%
Customer No.
10%
Customer Name
Service No.
Serial No.
Select Country
Enter Password
[ ]
Local
Off/ 12 Sec/Unlimited
On, Off
00-50
Off
Off
55
Samsung Electronics
Service Manual
4-5
Alignment and Adjustments
4.2.3 Setting
4.2.3.1 Changing the Display Language
To change the language that displays on the control panel, follow these steps:
1.
Press Menu until “Machine Setup” appears on the top line of the display.
2.
Press the scroll button ( or ) until “Language” appears on the bottom line of the display.
3.
Press Enter. The current setting appears on the bottom line of the display.
4.
Press the scroll button ( or ) until the language you want appears on the display.
5.
Press Enter to save the selection.
6.
To return to Standby mode, press Stop/Clear.
4.2.3.2 Setting the Machine ID
In some countries, you are required by law to indicate your fax number on any fax you send. The Machine
ID, containing your telephone number and name (or company name), will be printed at the top of each page sent from your machine.
1.
Press Menu until “Machine Setup” appears on the top line of the display. The first available menu item,
“Machine ID,” displays on the bottom line.
2. Press Enter. The display asks you to enter the fax number.
If there is a number already set, the number appears.
3.
Enter your fax number using the number keypad.
NOTE: If you make a mistake while entering numbers, press the button to delete the last digit.
4.
Press Enter when the number on the display is correct. The display asks you to enter an ID.
5.
Enter your name or the company name using the number keypad.
You can enter alphanumeric characters using the number keypad, and include special symbols by pressing the 0 button.
For details on how to use the number keypad to enter alphanumeric characters.
If you want to enter the same letter or number in succession, enter one digit, move the cursor by pressing the button and enter the next digit.
If you want to insert a space in the name, you can also use the button to move the cursor to skip the position.
6.
Press Enter when the name on the display is correct.
7.
To return to Standby mode, press Stop/Clear.
4-6
Service Manual
Samsung Electronics
Alignment and Adjustments
4.2.3.3 Setting the Date and Time
When you turn your machine on for the first time, the display prompts you to enter the current date and time.
After entering, it will not appear anymore. For the SCX-4 725 F N , all of your faxes will have the date and time printed on them.
NOTE: If power to the machine is cut off, you need to reset the correct time and date once the power has been restored.
1.
Press Menu until “Machine Setup” appears on the top line of the display.
2.
Press the scroll button ( or ) to display “Date & Time” on the bottom line and press Enter.
3.
Enter the correct time and date using the number keypad.
For the SCX4725 , press the scroll button ( or ) to enter the time and date.
Month = 01 ~ 12
Day = 01 ~ 31
Year = requires four digits
Hour = 01 ~ 12 (12-hour mode)
00 ~ 23 (24-hour mode)
Minute = 00 ~ 59
NOTE: The date format may differ from country to country.
You can also use the scroll button ( or ) to move the cursor under the digit you want to correct and enter a new number. For the SCX-4 725 , you can use Enter or Upper Level to move the cursor.
4.
To sel ect “ AM” or “PM” for 12-hour format, press the or # button or any number button.
For the SCX-4 725 , press Enter and then the scroll button ( or ).
When the cursor is not under the AM or PM indicator, pressing the or # button immediately moves the cursor to the indicator. For the SCX-4 725 , press the scroll button ( or ) to move the cursor to the indicator.
You can change the clock mode to 24-hour format (e.g. 01:00 PM as 13:00).
5.
Press Enter when the time and date on the display is correct.
When you enter a wrong number, the machine beeps and does not proceed to the next step. If this happens, just reenter the correct number.
6.
To return to Standby mode, press Stop/Clear.
4.2.3.4 Changing the Clock Mode
You can set your machine to display the current time using either a 12-hour or 24-hour format.
1.
Press Menu until “Machine Setup” appears on the top line of the display.
2.
Press the scroll button ( or ) until you see “Clock Mode” on the bottom line and press Enter.
The clock mode currently set for the machine displays.
3.
Press the scroll button ( or ) to select the other mode and then press Enter to save the selection.
4.
To return to Standby mode, press Stop/Clear.
Service Manual
4-7
Samsung Electronics
Alignment and Adjustments
4.2.3.5 Setting the Paper Size and Type
After loading paper in the tray, you need to set the paper size and type using the control panel buttons.
These settings will apply to copy and fax modes. For PC-printing, you need to select the paper size and type in the application program you use on your PC.
1.
Press Menu.
The display shows “Paper Setting” on the top line of the display.
2.
Press the scroll button ( or ) to display “Paper Size” on the bottom line and press Enter to access the menu item.
3.
Use the scroll button ( or ) to find the paper size you are using and press Enter to save it.
4.
Press the button to scroll to “Paper Type” and press Enter to access the menu item.
5.
Use the scroll button ( or ) to find the paper type you are using and press Enter to save it.
6.
To return to Standby mode, press Stop/Clear.
4.2.3.6 Setting Sounds
You can control the following sounds:
• Speaker: You can turn on or off the sounds from the telephone line through the speaker, such as the dial tone or a fax tone. With this option set to “Comm.” the speaker is on until the remote machine answers.
• Ringer: You can adjust the ringer volume.
• Key Sound: With this option set to “On” a key tone sounds each time a key is pressed.
• Alarm Sound: You can turn the alarm sound on or off. With this option set to “On” an alarm tone sounds when an error occurs or fax communication ends.
• You can adjust the volume level using the On Hook Dial button.
4.2.3.7 Speaker, Ringer, Key Sound, and Alarm Sound
1.
Press Menu until “Sound/Volume” appears on the top line of the display.
2.
Press the scroll button ( or ) to scroll through the options. Press Enter when you see the desired sound option.
3.
Press the scroll button ( or ) to display the desired status or volume for the option you have selected. You will see the selection on the bottom line of the display. For the ringer volume, you can select “Off,” “Low,” “Med,” and “High”. Setting “Off” means that the ringer does not sound. The machine works normally even if the ringer is turned off.
4.
Press Enter to save the selection. The next sound option appears.
5.
If necessary, repeat steps 2 through 4.
6.
To return to Standby mode, press Stop/Clear.
4-8
Service Manual
Samsung Electronics
Alignment and Adjustments
4.2.3.8 Speaker Volume
1.
Press On Hook Dial. A dial tone sounds from the speaker.
2.
Press the scroll button ( or ) until you hear the volume you want. The display shows the current volume level.
3.
Press On Hook Dial to save the change and return to Standby mode.
NOTE: You can adjust the speaker volume only when the telephone line is connected.
4.2.3.9 Toner Save Mode
Toner Save mode allows your machine to use less toner on each page. Activating this mode extends the life of the toner cartridge beyond what one would experience in the normal mode, but it reduces print quality.
To turn the toner save mode on or off, press Toner Save.
• If the button backlight is on, the mode is active and the machine uses less toner when printing a document.
• If the button backlight is off, the mode is deactivated and the machine prints with the normal quantity of toner.
4.2.3.10 Power Save Mode
Power Save mode allows your machine to reduce power consumption when it is not in actual use. You can turn this mode on and select a length of time for which the machine waits after a job is printed before it switches to a reduced power state.
1.
Press Menu until “Machine Setup” appears on top line of the display.
2.
Press the scroll button ( or ) until “Power Save” appears on the bottom line. Press Enter.
3.
Press the scroll button ( or ) to display “On” on the bottom line and press Enter.
Selecting “Off” means that the power save mode is deactivated.
4.
Press the scroll button ( or ) until the time setting you want appears.
The available options are 5, 10, 15, 30, 60 and 120 (minutes).
5.
Press Enter to save the selection.
6.
To return to Standby mode, press Stop/Clear.
Service Manual
4-9
Samsung Electronics
Alignment and Adjustments
4.2.4 FLASH UPGRADE
There are 2 methods to update the Flash Rom, Local and Remote.
(1) Local Machine
• RCP (Remote Control Panel) mode
This method is for Parallel Port or USB Port. Connect the PC and activate the RCP (Remote Control Panel) to upgrade the Firmware.
< Method >
How to Update Firmware using RCP
1. Connect PC and Printer with a Parallel Cable or a USB Cable.
2. Run the RCP utility and select Firmware Update.
3. Search for the Firmware file to be used to update the set using the Browse Icon.
4. Click the Update icon. The firmware file is transmitted to the Printer automatically and the printer is initialized when the download completes.
5. Click the Refresh icon and check that the updated version numbers are displayed.
• DOS Command mode
This method is ONLY for Parallel Port. Connect the PC to the set using a Parallel Cable and enter the DOS
Command to upgrade the firmware.
< Method >
1. First of all you need the following files : down.bat, down_com.bin, fprt.exe, and Rom File: (file name for upgrade). Ensure you save ALL of these files in the same folder.
2. At the DOS prompt enter the correct command (as shown below) and push the enter key.
Then the upgrade will automatically take place..
3. There are two commands use the correct one depending on the condition of the set..
* When the product is in the idle condition
down "rom file"
* When the product is in Ready condition
(TECH MODE --> DATA SETUP --> FLASH UPGRADE --> LOCAL)
copy/b "rom file" lpt1
4. Do not turn off the power during the upgrade process.
(2) Remote FAX
It is possible to use a set that already has the latest firmware to upgrade a remote set remotely using the telephone system.
< Method >
1. On the set that has the latest firmware set it toi transmit the upgrade:-
(TECH MODE •DATA SETUP•••• FLASH UPGRADE•••• REMOTE)
2. Enter the telephone number of the set that needs to be upgraded.
(Several faxes can be upgrade at the same time. In this case, enter each fax number.)
3. When the enter button is pressed the set sends the firmware file by calling designated fax number.
(Around 10~15 minutes are needed to send the file.)
< Caution >
1. The Sending and Receiving fax machines MUST be the same model.
2. The sending fax must be set up in ECM mode and the Receiving fax memory must be 100%.
If not the function will not work.
4-10
Service Manual
Samsung Electronics
Alignment and Adjustments
4.2.5 Machine Test
SWITCH TEST
Use this feature to test all keys on the operation control panel. The result is displayed on the LCD window each time you press a key.
MODEM TEST
Use this feature to hear various transmission signals to the telephone line from the modem and to check the modem, amplifier and speaker. If no transmission signal sound is heard, it means the modem part of the main board, amplifier, speaker or speaker harness is faulty.
DRAM TEST
Use this feature to test the machine's DRAM. The result appears in the LCD display.
If all memory is working normally, the LCD shows << O K >>
ROM TEST
Use this feature to test the machine's ROM. The result and the software version appear in the LCD display.
• FLASH VER : 1.00 V
• ENGINE VER :1.00V
PATTERN TEST
Using this pattern printout you can check that the printer mechanism is functioning properly.
This function is for factory manufacturing use only.
SHADING TEST
The function is used to set the optimum scan quality determined by the specific characteristics of the
CIS(Contact Image Sensor). If copy image quality is poor perform this function to check the condition of the CIS unit.
< Method >
1. Select the [Shading Test] in TECH MODE
(Menu, #, 1934).
2. Push the ENTER button and an image will be scanned.
3. After scanning the CIS SHADING PROFILE will be print out.
4. If the printed image is different to the sample image shown the CIS is defective.
NOTICE : When you test the CIS, make sure that the cover is closed.
MAX=229 Min=168 Avg=193 Diff=15 PRNU=6
MAX=234 Min=174 Avg=200 Diff=14 PRNU=7
MAX=241 Min=179 Avg=204 Diff=14 PRNU=4
MAX=240 Min=176 Avg=202 Diff=15 PRNU=6
Service Manual
4-11
Samsung Electronics
Alignment and Adjustments
4.2.6 Report
PROTOCOL LIST
This list shows the sequence of the CCITT group 3 T.30 protocol during the most recent sending or receiving operation. Use this list to check for send and receive errors. If
SYSTEM DATA
This list provides a list of the user system data settings and tech mode settings.
KEY HISTORY
This list shows th input key history.
ERROR INFO
This list display the detail machine error list.
4-12
Service Manual
Samsung Electronics
Alignment and Adjustments
4.3 Control Panel
4.3.1 Control Panel Functions
SCX-4521F
[Reperence] This Model is Test page not Support.
Samsung Electronics
Service Manual
4-13
Alignment and Adjustments
4-14
Service Manual
Samsung Electronics
Alignment and Adjustments
4.4 LCD Status Error M
e
ssages
STATUS
Document Jam
Door Open or Jam
Cover Open
NO paper
PAPER JAM 0
PAPER JAM 1
PAPER JAM 2
Communication Error
Line Error
NO ANSWER
INCOMPATIBLE
LINE BUSY
POWER FAILURE
STOP PRESSED
MEMORY FULL
FUSER ERROR
LSU ERROR
LSU ERROR
TONER LOW
TONER EMPTY
[Line Error]
[No Answer]
[Incompatible]
Line Busy
Power Failure
[Stop Pressed]
Memory Full
CRU Fuse Error
[Hsync Error]
[LSU Error]
LCD Display
Document Jam
[Front or Rear]
[Cover Open]
[ No Paper ]
Add Paper
[Paper Jam 0]
Open/Close Door
[Paper Jam 1]
Open/Close Door
[Paper Jam 2]
Check Inside
[COMM. Error]
[Toner Low]
[Toner Empty]
[Replace Toner]
Descriptions
When Document Jam occurred at ADF module.
This is displayed on LCD, Print in the Transmission Journal.
When machine’ front side cover or Jam Cover was opened, it displayed On the LCD.
When there is no paper in CASSETTE Tray, machine Displays this message on LCD.
When the machine encountered paper jam in pick up area,
Machine displays on the LCD until DOOR OPEN & CLOSE.
When the machine encountered paper jam in paper exit of Machine, machine displays on the LCD until DOOR OPEN & CLOSE.
When the machine encountered paper jam in paper exit of Machine, machine displays on the LCD until DOOR OPEN & CLOSE.
When the machine has problem in communication, It displayed on the LCD.
Machine displays this in case of Transmission.
Machine displays this in case of fax handshaking step of Reception.
When the machine has problem in case of Fax Data reception step.
When the machine could not connect to remote fax after Completion of redial up to redial counter in system data.
Remote party did not have the requested feature, such as polling.
The remote fax didn’t answer.
When the machine’s user memory has not been backup and There was power off / on.
When the operator pressed the STOP button during transmission.
When the machine has encountered the user memory was full.
When the machine failed in installing the new toner cartridge. tech mode user mode
When the machine has encountered the Laser Beam Scanning unit could not reach the READY state.
When the machine has encountered the Toner Low.
When the machine has encountered the Toner Empty.
Service Manual
4-15
Samsung Electronics
Alignment and Adjustments
<continue..>
STATUS
BY PASS JAM
GROUP is not available
RETRY REDIAL?
LCD Display
[Bypass Jam]
Group Not Available
Retry Redial ?
NO. NOT ASSIGNED
Load document
NO. Not Assigned
Load Document
Memory full and canel the job Cancel ?
1:Yes 2:No
Job has not been created
Low Heat Error
Open Fuser Error
Over Heat Error
Memory Dial Full
Operation Not
Assigned
[Low Heat Error]
Open Fuser Error
[Over Heat]
[Jam 1]
[No Catridge]
Memory Dial Full
Descriptions
When the machine detected the non feeding from BYPASS Tray.
You have tried to select a group location where only a single
Location number can be used.
the machine is waiting for the programmed interval to automatically redial a previously busy station.
The speed dial location you tried to use has no number assigned to it.
You have attempted to set up a sending operation with no
Document loaded.
When the machine has encountered the memory full during storing the document into memory, the machine display the "CANCEL ?" to operator whether he/she make a decision the canceling the job or accept the scanned page so far to transmit the remained documents.
When operator is doing in ADD/CANCEL operation and
There is no job to handle if operator entered the job no.
Temperature could not reach certain level.
The thermister has been disconnected.
Temperature has gone up very high degree.
When the machine detected the toner cartridge has not been installed, or detected jam1 in warmup state.
During Auto dial transmission when all 15 jobs are configured and try to add 16th job
4-16
Service Manual
Samsung Electronics
Alignment and Adjustments
4.5 Engine Test Mode
The Engine Test Mode supplies useful functions to check the condition of the print engine. It tests the condition of each device and displays the result of the test on the LCD. It is divided into 5 functions (0~4), and these are shown below.
4.5.1 To enter the Engine Test Mode
To enter the Engine Test mode (SCX-4
725
FN)
Press in sequence, and the LCD briefly displays
‘Engine Test’, the machine has entered Engine Test Mode.
Press “0”, “1”, “2”, “3” or “4” to select the Test No. (see list below – left hand column)
4.5.2 Diagnostic
NO.
0
1
2
3
4
3
4
1
2
3
7
8
9
4
5
6
3
4
1
2
Sub No.
1
2
3
4
1
2
1
2
Engine test
Motor Test
Pick Up Test
Main Fan Test
SMPS FAN
LSU Error Test
LD Test
Feed Sensor Test
Exit Sensor Test
Cover Sensor Test
Empty Sensor Test
Therm ADC 170
Therm ADC 160
Therm ADC 150
Therm ADC 140
Therm ADC 130
Therm ADC 125
Therm ADC 120
Therm ADC 115
Therm ADC 110
MHV Test (1300V)
Dev Bias Test (350V)
THV Test (1300V)
THV Test (-)
Remark
1 : On, 2 : Off – next test selected
1 : On, 2 : Off – next test selected
1 : On, 2 : Off – next test selected
1 : On, 2 : Off – next test selected
1 : On, 2 : Off – next test selected
1 : On, 2 : Off – next test selected
1. Check : read the sensor
2. Next : Next Sensor test
1. Check : read the sensor
2. Next : Next Sensor test
1. Check : read the sensor
2. Next : Next Sensor test
1. Check : read the sensor
2. Next : Next Sensor test
1 : On, 2 : Off (maintain the fusing temp.)
1 : On, 2 : Off (maintain the fusing temp.)
1 : On, 2 : Off (maintain the fusing temp.)
1 : On, 2 : Off (maintain the fusing temp.)
1 : On, 2 : Off (maintain the fusing temp.)
1 : On, 2 : Off (maintain the fusing temp.)
1 : On, 2 : Off (maintain the fusing temp.)
1 : On, 2 : Off (maintain the fusing temp.)
1 : On, 2 : Off (maintain the fusing temp.)
1 : On, 2 : Off
1 : On, 2 : Off
1 : On, 2 : Off
1 : On, 2 : Off
Service Manual
4-17
Samsung Electronics
Alignment and Adjustments
4.5.3 Detail Description (Engine Test Mode)
Function Name
01.Motor Test
02.Pick Up Test
03.Fan Test
11.LSU Motor
12.LSU Error Test
13.LD Test
21.Feed Sen Test
22.Exit Sen Test
23.Cover Sen Test
24.Empty Sen Test
31.Them ADC 170
32.Them ADC 160
33.Them ADC 150
35.Them ADC 140
36.Them ADC 130
37.Them ADC 125
38.Them ADC 120
39.Them ADC 115
40.Them ADC 110
41.MHV Test (1300V)
42.Bias Test (350V)
43.THV Test (1300V)
44.THV Test (-)
Description
The main motor starts when the execution key is pressed and stops when the stop key is pressed.
Automatically stops, when the execution is chosen.
stops, when the execution is chosen.
The fan starts when the execution key is pressed and stops when the stop key is pressed.
The laser motor starts when the execution key is pressed and stops when the stop key is pressed.
The LSU motor starts and "Laser Ready" is displayed if the motor spins at the correct speed, otherwise "Laser Error" is displayed.
"Diode On" is displayed, when the laser diode is on.
Otherwise "Diode Off" is displayed.
These functions allow the current state of the sensor to be displayed.
This function allows the current state of the Cover sensor to be displayed. Touch the sensor and confirm that the message changes: "Cover Open" to " Cover Close"
These functions allow the current state of the sensor to be displayed.
"Current value" is displayed on the upper line of the LCD, and "Target value" on the bottom line.
Target value is limited from "191°C" to "80°C"
Display
Main Motor On/Off
Tray 1,2 Solenoid On/Off
Fan On/Off
Laser Motor On/Off
Laser Leady On/Off
Diode On/Off
"Sensor Off" or “ Sensor On ”
"Cover Open" or "Cover Close"
"Sensor Off" or “ Sensor On ”
Target temperature and output temperature from thermistor and ADC.
These Functions are provided to check whether the control of the HVPS is functioning correctly.
MHV On/Off
Dev Bias On/Off
THV EN/NEG On/Off
THV On/Off
4-18
Service Manual
Samsung Electronics
4.6 Paper Path and Clearing Paper Jams
4.6.1 Copy & Scan Document Path
Alignment and Adjustments
Samsung Electronics
Service Manual
4-19
Alignment and Adjustments
4.6.2 Printer Paper Path
1) After receiving a print command, the printer feeds paper from the main cassette or manual feeder as required.
2) The paper being fed passes the paper feed sensor. (Jam 0 occurs if the sensor is not operated within a certain time)
3) Having passed the paper feed sensor the paper moves to the paper exit sensor via printing process. (Jam 1 occurs if the sensor is not operated within a certain time)
4) The paper then passes through the paper exit sensor and out of the set. (Jam 2 occurs if the trailing edge of the paper does not pass the exit sensor within a certain time of the paper leading edge activating the exit sensor)
14
12
13
BIN PATH
12
14
4-20
Service Manual
13
Samsung Electronics
Alignment and Adjustments
4.6.3 Clearing Paper Jams
When a paper jam occurs, “Paper Jam” appears on the display.
Refer to the table below to locate and clear the paper jam.
Message
[Paper Jam 0]
Open/Close Door
[Paper Jam 1]
Open/Close
[Paper Jam 2]
Check Inside
Location of Jam
In the tray
In the fuser area or around the toner Door cartridge.
In the paper exit area
To avoid tearing the paper, pull out the jammed paper gently and slowly. Follow the instructions in the following sections to clear the jam.
4.6.3.1 In the Tray
1. Remove the jammed paper in the tray by gently pulling it straight out.
2. Open and close the front door to resume printing.
Samsung Electronics
Service Manual
4-21
Alignment and Adjustments
4.6.3.2 In the Fuser Area or Around the Toner Cartridge
NOTE: The fuser area is hot. Take care when removing paper from the machine.
1. Open the front door and pull the toner cartridge out, lightly pushing it down.
3. Replace the toner cartridge and close the front door. Printing automatically resumes.
2. Remove the jammed paper by gently pulling it straight out.
4-22
Service Manual
Samsung Electronics
Alignment and Adjustments
4.6.3.3 In the Paper Exit Area
1. Open and close the front door. The jammed paper automatically exits the machine.
If the paper does not exit, continue to step 2.
2. Gently pull the paper out of the output tray.
4. Remove the jammed paper by gently pulling it straight out.
NOTE: Inside of the machine is hot. Take care when removing paper from the machine.
3. If there is any resistance and the paper does not move when you pull, or if you cannot see the paper in the output tray, open the rear door by pulling the tab on it.
5. Close the rear door.
6. Open and close the front door to resume printing.
Service Manual
4-23
Samsung Electronics
Alignment and Adjustments
4.6.3.4 Tips for Avoiding Paper Jams When Printing on the A5-sized Paper
If paper jams occur frequently when you print on A5-sized paper:
1. Load the paper into the tray, as shown below.
3. From the Orientation option of the Layout tab, set the Rotate option to 90 .
4. Click OK to start printing.
For details, see Software User’s Guide.
2. Open the printer’s properties window, set the paper size to A5 from the Paper tab.
4.6.3.5 Tips for Avoiding Paper Jams
By selecting the correct paper types, most paper jams can be avoided. When a paper jam occurs.
• Follow the procedures in “Loading Paper”. Ensure that the adjustable guides are positioned correctly.
• Do not overload the tray.
• Do not remove paper from the tray while your machine is 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 tray.
• Use only recommended print materials. See “Paper Specifications”.
• Ensure that the recommended print side of print materials is facing up in the tray.
4-24
Service Manual
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 proximity of cables to moving parts makes proper routing a must.
If components are removed, any cables disturbed by the procedure must be restored as close as possible to their original positions. Before removing 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.
Releasing Plastic Latches
Many of the parts are held in place with plastic latches.
The latches break easily; release them carefully.
To remove such parts, press the hook end of the latch away from the part to which it is latched.
Service Manual
5-1
Samsung Electronics
Disassembly and Reassembly
5.2 MP Tray
1. Open the Front Cover.
3. Hold the MP Tray and pull it to the arrow direction.
Front Cover
2. Release the Toner Cartridge.
Toner Cartridge
MP Tray
5-2
Service Manual
Samsung Electronics
Disassembly and Reassembly
5.3 Pick Up Roller
1. Before you remove the Pick Up Roller, you should remove:
- MP Tray (Refer to the 5.2)
2. When if only remove the Pick Up Rubber, first pull the Pick Up Hausing A (with Rubber) from the
Housing B in the direction of arrow and then release the Pick Up Rubber from the Housing A, as shown below.
Housing B
Housing A
(with Rubber)
5.4 Front Cover
1. Open the Front Cover.
2. To remove the Front Cover, first pull the part below the right side of the Front Cover with a light pressure to the direction of arrow(left).
1
Front Cover
2
Service Manual
5-3
Samsung Electronics
Disassembly and Reassembly
5.5 Cassette Tray
1. Open the Cassette Tray.
2. As shown below, to remove the Cassette Tray, lift the nob to the direction of the arrow with a light pressure while holding the Set(left).
2
Cassette Tray
1
5-4
Service Manual
Samsung Electronics
Disassembly and Reassembly
5.6 Rear Cover
1. Remove the four screws securing the Rear Cover and remove it.
3. To remove the Rear cover make sure the right
Power Switch doesn't get jammed to the Rear
Cover, as shown below.
Rear Cover
Sensor
PBA
2. Open the Jam Cover.
Jam Cover
4. If necessary, remove the Jam Cover in the direction of arrow, as shown below.
Jam Cover
Rear Cover
Service Manual
5-5
Samsung Electronics
Disassembly and Reassembly
5.7 Right Cover
1. Before you remove the Right Cover, you should remove:
- Front Cover (Refer to the 5.4)
- Rear Cover (Refer to the 5.6)
2. Remove the one screws securing the Right Cover.
3. Apply light pressure to the back of the Right Cover and pull it to the right side in the direction of arrow, as shown below.
Right Cover
5-6
Service Manual
Samsung Electronics
Disassembly and Reassembly
5.8 Left Cover
1. Before you remove the Left Cover, you should remove:
- Front Cover (Refer to the 5.4)
- Rear Cover (Refer to the 5.6)
2. Remove the one screws securing the Left Cover.
4. Unplug the Speaker Connector from the Main PBA.
Speaker
3. Apply light pressure to the back of the Left Cover and pull it to the leftt side in the direction of arrow, as shown below.
Left Cover
5. If necessary, remove the two screws securing the
Speaker and remove it.
Left Cover
Sponge
Speaker
Fixing
Bracket
Service Manual
5-7
Samsung Electronics
Disassembly and Reassembly
5.9 Scan Ass'y
1. Before you remove the Scan Ass'y, you should remove:
- Rear Cover (Refer to the 5.6)
- Right Cover (Refer to the 5.7)
- Left Cover (Refer to the 5.8)
2. Remove the two screws from the Middle Cover and remove the screw securing the Ground Cable from the Main PBA, as shown below.
4. Release the Scan Ass'y in the direction of arrow, as shown below.
Scan Ass'y
Middle
Cover
Middle
Cover
3. Unplug the three Connectors(ADF, Scan Motor,
OPE) and Film Cable-CIS, as shown below.
Film
Cable
Scan
Motor
ADF
OPE
Main PBA
5-8
Service Manual
Samsung Electronics
Disassembly and Reassembly
5.10 ADF Housing
1. Before you remove the ADF Housing, you should remove:
- Scan Ass'y (Refer to the 5.9)
2. Open the ADF Housing and insurt a flat-blade screwdriver into the slot as shown below, and remove the Cap-Hinge from the Platen Housing and ADF Housing.
4. Remove the two screws securing the ADF Ass'y and remove it. At that time, carefully release the
ADF Motor Harness from the Platen Cover, as shown below.
ADF Ass'y
ADF Motor Harness
Cap-Hinge
3. Remove the ADF Housing from the Platen
Housing. At that time, carefully release the ADF
Motor Harness from the Platen Housing, as shown below.
ADF Housing
Scan Motor
Harness
Core
1
Harness
2
5. If necessary, remove the two screws securing the
TX Stacker Ass'y and remove it, as shown below.
TX Stacker Ass'y
Platen Cover
Service Manual
5-9
Samsung Electronics
Disassembly and Reassembly
6. Open the Open Cover and remove the Open
Cover in the direction of arrow, as shown below.
Open Cover
8. Remove the two screws securing the ADF Upper and insurt a flat-blade screwdriver in to slot as shown below, and remove the ADF Upper.
2
1
2
ADF Upper
7. Pull the Bush, then rotate until it reaches the slot, as shown below. Then lift the Pick Up Unit.
1
Bush
ADF Lower
9. Unplug the Connector from the ADF PBA and remove the four screws securing the ADF Motor
Housing and remove it in the direction of arrow, as shown below.
ADF Motor Housing
2
Bearing
Pick Up Unit
5-10
Service Manual
Samsung Electronics
Disassembly and Reassembly
5.11 OPE Unit
1. Open the ADF Housing and insurt a flat-blade screwdriver into the crack as shown below, and remove the OPE Unit from the Platen Housing.
3. Remove the five screws securing the OPE PBA and remove it.
OPE PBA
ADF Housing
1
OPE
2
2. Unplug the three Connectors(Battery, OPE, Full
Sensor), as shown below.
OPE PBA
4. Release the Contact Rubbers, as shown below.
Rubber-Scroll
Rubber-Tel
OPE
Full Sensor
Battery
(NIH)
5. Release the Keys, as shown below.
Copy
Resolution
Scroll
Tel
Start
FAX
Stop
Toner Save
Scan To
OPE Cover
Service Manual
5-11
Samsung Electronics
Disassembly and Reassembly
5.12 Platen Housing
1. Before you remove the Platen Housing, you should remove:
- Scan Ass'y (Refer to the 5.9)
- ADF Housing (Refer to the 5.10)
- OPE Unit (Refer to the 5.11)
2. Remove the five screws from the Scan Upper and remove it from the Scan Lower, as shown below.
Scan Upper
4. Push the Holder in the direction of arrow and remove the Belt, as shown below. (The CIS will come out at the same time.)
CIS
Belt
3
2
1
Scan Lower
3. Take out the Battery(NIH).
Battery(NIH)
5. Release the Belt and Flat Cable from the CIS.
CIS
Belt
Core
Film Cable
5-12
Service Manual
Samsung Electronics
Disassembly and Reassembly
6. Remove the two screws securing the Scan Motor
Ass'y and remove it.
Scan Motor Ass'y
8. Using a flat-blade screwdriver remove the Full
Sensor, as shown below.
Full Sensor
7. If necessary, remove the two screws securing the
Scan Motor and remove it.
Scan Motor
Bracket
Scan Motor
Service Manual
5-13
Samsung Electronics
Disassembly and Reassembly
5.13 Middle Cover
1. Before you remove the Middle Cover, you should remove:
- Scan Ass'y (Refer to the 5.9)
2. Remove the five screws securing the Middle Cover, as shown below.
4. If necessary, take out the Stacker.
Main PBA
Stacker
3. Carefully release the Middle Cover in the direction of arrow, as shown below.
Middle Cover
5-14
Service Manual
Samsung Electronics
Disassembly and Reassembly
5.14 HVPS
1. Before you remove the HVPS, you should remove:
- Scan Ass'y (Refer to the 5.9)
- Middle Cover (Refer to the 5.13)
2. Remove the three screws securing the Sheet and remove it.
4. Unplug the Connector from the HVPS and remove it.
Sheet
3. Remove the three screws securing the HVPS and unplug the connector(DC Fan) from the HVPS, as shown below.
HVPS
Notice : Be awer of the Terminals(TR L) to ensure they are not lost.
DC Fan
Service Manual
5-15
Samsung Electronics
Disassembly and Reassembly
5.15 Main PBA
1. Before you remove the Main PBA, you should remove:
- Scan Ass'y (Refer to the 5.9)
- Middle Cover (Refer to the 5.13)
2. Unplug the all Connectors from the Main PBA, as shown below.
4. Remove the four screws securing the Shield Main
PBA and remove it.
Shield Main PBA
3. Remove the four screws securing the Main PBA and remove it.
Main PBA
5. The connectors are located, as shown below.
Thermo
ADF Motor
Exit
LSU
DEBUG
Scan Motor CIS
Fan_SMPS
OPE
USB
Line
LSU
Main Motor
JTAG
Speaker
Modem
Clutch
CRUM
HVPS
(Main PBA)
5-16
Service Manual
Samsung Electronics
Disassembly and Reassembly
5.16 RX Drive
1. Before you remove the RX Drive, you should remove:
- Scan Ass'y (Refer to the 5.9)
- Middle Cover (Refer to the 5.13)
- Main PBA (Refer to the 5.15)
2. Remove the two screws securing the Engine
Shield and remove the five screws securing the
Frame then remove the RX Drive in the direction of arrow, as shown below.
RX Drive
3. For easy disassembly, release the Feed Gear from the Frame.
Feed Gear
Notice : The five screws have numbers stamped into the RX Drive Ass'y base plate.
When refitting the Rx Drive Ass'y tighten the screws the order they are numbered.
4. If necessary, remove the two screws securing the
RX Motor and remove it.
RX Motor
Service Manual
5-17
Samsung Electronics
Disassembly and Reassembly
5.17 Fuser Unit
1. Before you remove the Fuser, you should remove:
- Scan Ass'y (Refer to the 5.9)
- Middle Cover (Refer to the 5.13)
2. Unplug the two Connectors from the SMPS and
Main PBA, as shown below.
Thermister
4. Remove the Safty Cover using a flat-blade screwdriver, as shown below.
Safty Cover
2
1
Fuser
3. Remove the four screws securing the Fuser and remove it, as shown below.
Fuser Unit
5. Remove the two screws securing the Fuser Front
Cover and remove it, as shown below.
Fuser Front Cover
5-18
Service Manual
Samsung Electronics
Disassembly and Reassembly
6. As shown below rotate the Holder to the direction of the arrow which is attached to the Exit Roller
F/Down and Exit Gear(DR38/25).
(The Roller_Main, Roller_FR, F/Down Holder,
Spring will come out at the same time.)
8. First remove the two screws securing the
Thermostat and then take out the Thermostat and release the CBF Harness, as shown below.
Exit Roller F/Down
Exit Gear
Holder
Roller_FR
Roller_Main
F/Down Holder
Holder Spring
Thermostat
9. Remove the screw securing the Thermistor
Harness and take out the Thermistor, as shown below.
Notice : If you don't follow the direction above the
Spring will come out forcing the Roller_Main,
Roller_FR, F/Down Holder inside the Frame
Ass'y.
7. To remove the Thermo Cap, first unlatch the hooks using a flat-blade screwdriver in the direction of arrow and then pull the Thermo Cap, as shown below.
Thermistor
2
Thermo Cap
1
Service Manual
5-19
Samsung Electronics
Disassembly and Reassembly
10. First unlatch the hooks and remove the Lamp
Cover right and left, as shown below.
Lamp Cover right
1
2
12. Carefully release the Halogen Lamp in the direction of arrow.
Halogen Lamp
2
1
Lamp Cover left
11. Release the CBF Harness from the Halogen
Lamp and remove the two screws securing the
Halogen Lamp, as shown below.
CBF Harness
Fuser
13. If necessary, remove the four screws securing the
Fuser Cover and remove it.
Pressure Roller
Heat Roller
CBF Harness
Fuser Joint
Fuser Cover
Notice : Be careful not to damage or contaminate the surface of the roller when assembling and disassembling the Heat Roller.
5-20
Service Manual
Samsung Electronics
Disassembly and Reassembly
5.18 Engine Shield (With LIU PBA, SMPS)
1. Before you remove the Engine Shield, you should remove:
- Scan Ass'y (Refer to the 5.9)
- Middle Cover (Refer to the 5.13)
4. Remove the six screws securing the Engine Shield and unplug the DC Fan connector from the Main
PBA. Then carefully release the Engine Shield from the Actuator Feed Sensor Lever, as shown below.
2. Unplug the all Connectors from the SMPS and LIU
PBA.
Engine Shield
(W/LIU PBA, SMPS)
LIU
SMPS
Fuser
3. Carefully release the CRUM Harness below the bottom of the Engine Shield in the direction of arrow.
Actuator Feed Sensor Lever
5. When if only remove the SMPS, first remove the
Rear Cover(refer to the 5.6) and unplug the two
Connectors from the SMPS, as shown below.
Then remove the six screws securing the SMPS and remove it.
SMPS
CRUM
Harness
Service Manual
5-21
Samsung Electronics
Disassembly and Reassembly
6. When if only remove the LIU PBA, first remove the
Rear Cover(refer to the 5.6) and then unplug the connector from the LIU PBA, as shown below.
Then remove the two screws securing the LIU PBA and remove it.
LIU PBA
5.19 LSU
1. Before you remove the LSU, you should remove:
- Scan Ass'y (Refer to the 5.9)
- Middle Cover (Refer to the 5.13)
2. Remove the three screws securing the LSU and remove it. Then unplug the two Connectors from the LSU.
LSU
5-22
Service Manual
Samsung Electronics
Disassembly and Reassembly
5.20 Paper Path Frame
1. Before you remove the Paper Path Frame, you should remove:
- Scan Ass'y (Refer to the 5.9)
- Middle Cover (Refer to the 5.13)
- Fuser (Refer to the 5.17)
- Engine Shield (Refer to the 5.18)
2. Remove the four screws securing the Paper Path
Frame and remove it, as shown below.
4. Unlatch the lock device of the Pick Up Gear and remove it.
Pick Up Gear
2
1
Paper Path Frame
5. To remove the Pick Up Unit, first lift the notch attached to the left side Pick Up Cam so that it's slide the left to right from the Pick Up Shaft, and then slide the Pick Up Unit right side to left side and take out the right side, as shown below.
3. To remove the Transfer Roller, first unlatch the lock device of the Holder TR from the Frame and then pull the Transfer Roller(with Holder TR) in the direction of arrow, as shown below.
1
Bush
Holder TR
2
1
Cam
3
Transfer Roller
Notice : Do not grab the rubber part of the Transfer
Roller, it may cause a malfunction due to a foreigen object. Holde the both side of the
Transfer Roller when replacing it.
Samsung Electronics
Pick Up Unit
2
Service Manual
5-23
Disassembly and Reassembly
6. To remove the Feed Roller, first unlatch the lock device of the Feed Gear and remove it. Then pull the Feed Roller from the Bush and take out the
Feed Roller(with Feed Shaft) from the Frame in the direction of arrow, as shown below.
Feed Shaft
Feed Roller
Feed Gear
3
1
2
Bush
7. Remove the screw securing the MP Solenoid and remove it, as shown below.
MP Solenoid
5-24
Service Manual
Samsung Electronics
Disassembly and Reassembly
5.21 CRUM Harness
1. Before you remove the CRUM Harness, you should remove:
- Scan Ass'y (Refer to the 5.9)
- Middle Cover (Refer to the 5.13)
- HVPS (Refer to the 5.14)
2. Remove the two screws securing the CRUM
Hausing and remove it.
4. Carefully release the CRUM Harness(with CRUM
PBA) below the bottom of the Engine Shield in the direction of arrow.
CRUM
Harness
CRUM Housing
3. Unplug the three connectors from the Main PBA and SMPS, as shown below.
From the Main PBA
From the SMPS
5. If necessary, remove the two screws securing the
CRUM PBA and remove it, as shown below.
CRUM Hausing
CRUM Harness
(with CRUM PBA)
Service Manual
5-25
Samsung Electronics
]
6
6. Troubleshooting
Before attempting to repair the printer first obtain a detailed description of the problem from the customer.
Troubleshooting
Power On
OP Panel
ON?
- No Power
- Power Module error
- Main PBA error
- LCD Panel error
Indicate
Error Massage
Ready or
Power save
*Test Print printing
Quality is
Nomal?
Refer to "Solution of Image Problem"
END
* : Only Laser Printer (MFP Not Support)
Refer to
Error Massage
<Chapter 4.3>
Service Manual
6-1
Samsung Electronics
Troubleshooting
6.1.1 Basic Check List
1. Check the Power.
• Does "Warming Up" appear on the display?
--> If not check power cable, switch or SMPS.
--> Does the wall socket work?
• Do the Motors or other components initialize (listen for main motor, fan and LSU sounds)?
--> If not or there are none of the normal startup sounds check cable, switch or SMPS.
--> Does the wall socket work?
2. Check the LCD Panel.
• Is there any display at all?
--> If not check power cable, switch or SMPS.
--> Does the wall socket work?
• Is the display a meaningful message care there any broken or badly formed characters?
--> Check the main PBA and cable harness.
• Is the message on the LCD Panel a standard error message?
--> Refer to section 4.3
3. Check the Paper Path
• Is there a Paper Jam?
--> Remove any paper fragments caught in the paper path.
• Paper Jam occurs repeatedly at a specific point in the Paper Path
--> Open the fuser cover, Jam clear.
--> Dismantle the machine and carefully inspect the region where the jam occurs.
(Especially, check if paper fragments are caught in the Fuser
4. Print the Information Page (Configuration).
• Try printing a test page from a computer.
--> If there is an error check cables and driver installation.
5. Check the Print Quality.
•Is there are a Print Quality Problem?
--> Refer to section 6.5
6. Check consumables (toner etc.).
•Using the keys print the Test Pattern.
--> Expected life of various consumable parts, compare this with the figures printed and replace as required
6-2
Service Manual
Samsung Electronics
Troubleshooting
6.1.2 Initial Inspection
1. Check Power part
1. The printer does not work no matter how long you wait.
A. Is the Power Switch (printer and wall socket) turned on ?
B. Is the Power Cord connected to the printer correctly ?
C. Is the Power cord connected to the wall socket correctly ?
D. Is wall socket working ?
E. Is the unit rated at the same voltage as the supply ?
2. Does the Fan work when power is turned on?
A. Check the connectors on the SMPS.
B. Check the fuses in the SMPS.(F1)
2. Check the Installation Environment.
1. Ensure the installation surface is flat, level and free from vibration.
If necessary move the printer.
2. Ensure that the temperature and humidity of the surroundings are within specification
If necessary move the printer.
3. Ensure that the printer is position away from any air conditioning or other heating or cooling equipment. Also ensure that is not positioned in a direct draft from any air conditioning, fan or open window.
If necessary move the printer.
4. Ensure the printer is not positioned in direct sunlight.
If it is unavoidable use a curtain to shade the printer.
5. Ensure the printer is installed in a clean dust free environment.
Move the printer to clean area if necessary.
6. Some industrial or cleaning processes give of fumes which can affect the printer.
Move the printer away from this type of air pollution
3. Check paper type.
1. Use only paper which is of a suitable quality, weight and size?
See the user guide.
4. Check the overall condition of the printer
1. Is the printer properly maintained ?
Clean the Paper Transport Passages.
Any rollers with dirt surfaces should be cleaned or replaced.
Service Manual
6-3
Samsung Electronics
Troubleshooting
6.2 Bad discharge
6.2.1 Wrong Print Position
• Description
Printing begins at wrong position on the paper.
Wrong sense time caused by defective feed sensor actuator.
Check and Cause Solution
Replace the defective actuator
6.2.2 JAM 0
BIN PATH
Check and Cause
1. Check the Solenoid by using Engine Test Mode-Pick up Test.
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 Engine Test Mode-Feed Sensor Test.
• Description
1. Paper is not exited from the cassette.
2. Jam-0 occurs if the paper feeds into the printer.
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 or Sensor.
6-4
Service Manual
Samsung Electronics
Troubleshooting
6.2.3 JAM 1
BIN PATH
Check and Cause
1. If the recording paper is jammed in front of or inside the fuser.
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.
6.2.4 JAM 2
• Description
1. Recording paper is jammed in front of or inside the fuser.
2. Recording paper is stuck in the discharge roller and in the fuser just after passing through the Actuator-Feed.
1. Replace the SMPS.
Solution
2. Reassemble the Actuator-Feed and Spring-Actuator if the returning is bad.
BIN PATH
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.
• 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.
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.
Service Manual
6-5
Samsung Electronics
Troubleshooting
6.2.5 Multi-Feeding
• Description
Multiple sheets of paper are fed at once.
Check and Cause
1. Solenoid malfunction(the solenoid does not work properly): Perform Engine Test Mode-Pick up Test.
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.
6.2.6 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.
6-6
Service Manual
Samsung Electronics
Troubleshooting
6.2.7 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.
Samsung Electronics
Service Manual
6-7
Troubleshooting
6.3 Set Malfunction – Causes and Solutions
6.3.1 LCD Display Defect ( in LCD Display)
• Description
Strange characters are displayed in the LCD Window and OPE Panel buttons do not work.
Check and Cause
1. Clear the memory.
2. Check that the OPE HARNESS is connected to the Connection Board correctly.
Solution
1. Try again after clearing the memory.
2. If re-connecting the harness does not correct the fault replace the OPE Ass’y and the main
Board in sequence.
6.3.2 Defective OPE Keypad
• Description
Pressing keys does not cause the set to respond correctly
1. Clear the memory.
Check and Cause
2. Check that there is an audible key click when a key is pressed.
Solution
1. Check that the keypad is assembled correctly and the membrane is not damaged, replace the membrane or whole keypad assembly if necessary.
2. If the fault remains replace the OPE Ass’y and the
Main board in sequence.
6-8
Service Manual
Samsung Electronics
Troubleshooting
6.3.3 Fuser gear melts due to overheating causing Paper Jam.
• Description
Constant Jam where paper is entering Fuser unit.
Fuser rollers do not turn
Check and Cause
1. Check the Heat Lamp, thermostat and thermistor
Solution
1. Use Engine Test Mode to test the Fuser
-THERM ADC 120.
Replace Fuser unit
Replace SMPS or Main PBA as appropriate.
6.3.4 Paper Empty
• Description
Paper Empty is displayed in the LCD panel even when paper is loaded in the cassette.
Check and Cause
1. Deformed paper sensor actuator or faulty sensor.
2. SMPS PBA or Main PBA is defective
3. Faulty cables or connectors.
Solution
1. Replace the defective actuator or sensor.
2. Replace the SMPS PBA or MAIN PBA as appropriate.
6.3.5 Paper Empty without indication
• Description
The paper empty message does not appear in the LCD when the paper cassette is empty.
Check and Cause
1. Deformed paper sensor actuator or faulty sensor.
.
2. SMPS PBA or Main PBA is defective
Solution
1. Replace the defective actuator.
2. Replace the SMPS PBA or MAIN PBA as appropriate
Service Manual
6-9
Samsung Electronics
Troubleshooting
6.3.6 Cover Open
• Description
The Cover Open message appears on the LCD even when the print cover is closed.
Check and Cause
1. The ‘Open Cover’ microswitch may be stuck or faulty
2. The tab on the front cover may be damaged or broken
3. Check the connector and cables between HVPS and main PBA.
Solution
1. Use TECH mode(“cover sensor test”) to check cover switch operation. Check and replace switch if necessary.
2. Replace the front cover.
3. Replace the Main Control board or HVPS as necessary.
6.3.7 No error message when the cover is open
• Description
The Cover Open message does not appears on the LCD even when the print cover is open.
Check and Cause
1. The ‘Open Cover’ microswitch may be stuck or faulty
2. Check the connector and cables between HVPS and main PBA.
Solution
1. Use TECH mode(“cover sensor test”) to check cover switch operation. Check and replace switch if necessary.
2. Replace the Main Control board or HVPS S/W as necessary.
6-10
Service Manual
Samsung Electronics
Troubleshooting
6.3.8 Defective motor operation
• Description
Main motor is faulty and paper does not feed into the printer, resulting in Jam 0'
Check and Cause
1. The main motor harness or Motor PCB may be faulty.
Solution
1. Check the motor harnesses and connectors, replace if defective.. If the problem persists replace the main
PBA.
Note Check motor operation using Engine Test Mode.
6.3.9 No Power
• Description
When system power is turned on the LCD panel does 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. Check power fuse and SMPS fuses replace if necessary.
2. Replace the OP panel.
2. LCD panel does not come on but normal start up sounds are heard.
3. After replacing SMPS display does not come on and no start up sounds are heard.
3. Replace the main PBA.
6.3.10 Printed Vertical Lines become curved
• Description
When printing, vertical lines are not straight.
Check and Cause
1. Check stability of 24V supply to LSU.
Solution
1. 24V stable - Replace LSU.
24V unstable replace SMPS, if the problem persists replace the main PBA.
Service Manual
6-11
Samsung Electronics
Troubleshooting
6.4 Bad Software Environment
6.4.1 The printer is not working (1)
• Description
While Power turned on, the printer is not working in the printing mode.
1. Run Self-Test Mode : Turn the power on and pressing
“System Data List” by pressing Menu-Reports-System
Data.
Check and Cause
2. Check if the PC and the printer is properly connected and the toner cartridge installed.
3. Printing is not 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).
2. Replace the printer cable. If the problems not solved even after the cable replaced, check the amount of the remaining toner.
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.
6-12
Service Manual
Samsung Electronics
Troubleshooting
6.4.2 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.
Service Manual
6-13
Samsung Electronics
Troubleshooting
6.4.3 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.
6-14
Service Manual
Samsung Electronics
Troubleshooting
6.4.4 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.
Service Manual
6-15
Samsung Electronics
Troubleshooting
6.5 Bad image
6.5.1 Vertical Black Line and Band
• Description
1. Straight thin black vertical line occurs in the printing.
2. Dark black vertical band occur in the printing.
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Check and Cause
1. 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.
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.
6.5.2 Vertical White Line
• Description
White vertical voids in the image.
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Check and Cause
1. Foreign matter stuck onto the window of internal lenses of LSU mirror.
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.
6-16
Service Manual
Samsung Electronics
Troubleshooting
6.5.3 Horizontal Black Band
• Description
1. Dark or blurry horizontal stripes occur in the printing periodically.
(They may not occur periodically.)
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
1. Bad contacts of the voltage terminals to developer.
Check and Cause 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.
2. The rollers of developer may be stained.
OPC Drum = 75.5mm
Charge Roller = 37.7mm
Supply Roller = 47.5mm
Develop Roller = 35.2mm
Transfer Roller = 46.2mm
Heat Roller = 63.9mm
Pressure Roller = 75.4mm
3. If the malfunction persists, replace the developer.
6.5.4 Black/White Spot
• Description
1. Dark or blurry black spots occur periodically in the printing.
2. White spots occur periodically in the printing.
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Check and Cause
1. If dark or blurry black spots occur periodically, the rollers in the 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.
Service Manual
6-17
Samsung Electronics
Troubleshooting
6.5.5 Light Image
• Description
The printed image is light, with no ghost.
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Check and Cause
1. Develop roller is stained when the toner of 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.
6.5.6 Dark Image or a Black
• Description
The printed image is dark.
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Check and Cause
1. No charge voltage in the engine board.
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.
6-18
Service Manual
Samsung Electronics
Troubleshooting
6.5.7 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.
6.5.8 Background
• Description
Light dark background appears in whole area of the printing.
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Check and Cause
1. Does character exist less than 2% 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.
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.
Service Manual
6-19
Samsung Electronics
Troubleshooting
6.5.9 Ghost (1)
• Description
Ghost occurs at 75.5 mm intervals of the OPC drum in the whole printing.
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Check and Cause
1. Bad contacts caused by contamination from toner particles between high voltage terminal in the main body and the electrode of the 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.
2. Occur in the developer cartridge, replace the developer and try to print out.
3. Replace the Main board and HVPS Board if not solved by the above directions 1-2.
4. Transfer roller lifetime(50.000 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.
6.5.10 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
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Check and Cause
When printing on card stock thicker than normal paper or transparencies such as OHP, higher transfer voltage is required.
Solution
Select 'Thick Mode' on paper type menu from the software application and after using returning to the original mode is recommended.
6-20
Service Manual
Samsung Electronics
Troubleshooting
6.5.11 Ghost (3)
• Description
White ghost occurs in the black image printing at 47.5mm 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
1. Occur in the developer cartridge, replace the developer and try to print out.
2. Check the approved voltage of the supply roller and contact of the terminal and adjust if necessary.
6.5.12 Ghost (4)
• Description
Ghost occurs at 47.5mm(or 63.9mm) 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)
6.5.13 Stains on the Face of Page
• Description
The background on the face of the printed page is stained.
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Check and Cause
1. Toner leakage due to improperly sealed developer.
2. If the transfer roller is contaminated, stains on the face of page will occur.
Solution
1. Replace the developer cartridge.
2. If the transfer roller is contaminated, run
DRUM Cleaning Mode Print 2 or 3 times.
And perform Self-Test 2 or 3 times to remove contamination.
Service Manual
6-21
Samsung Electronics
Troubleshooting
6.5.14 Stains 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
Digital Printer
Digital Printer
Digital Printer
2. Pressure roller is contaminated.
Solution
1. Perform the DRUM 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.
6.5.15 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.
6.5.16 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 Engine Test
Mode 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.
6-22
Service Manual
Samsung Electronics
Troubleshooting
6.6 Fax & Phone Problems
6.6.1 No Dial Tone
• Description
There is no dial tone when the On-Hook dial button is pressed.
Check and Cause
1. Check that the telephone line cord supplied with the set is connected to TEL LINE correctly.
2. Listen for a CLICK sound when the OHD key is pressed.
3. Check the connection of the HARNESS between the LIU and the Main B'd.
4. Check that the SPEAKER is connected correctly.
Solution
1. If the telephone cord is OK but there is no dial tone, try plugging a normal telephone into the wall socket. If this is OK then replace the LIU B'd.
2. If you cannot hear the OHD CLICK sound, the OPE
Ass'y may be defective. Replace the OPE Ass'y.
(If the key click sound if off, you cannot hear click sound even if OPE Ass’y has no problem on it)
3. Check the Speaker connection and the harness between the LIU and the Main PBA, replace as necessary.
4. Use Tech mode / Modem Test to check that the speaker and amplifier are working. Replace the Main B'd.
6.6.2 Defective MF DIAL
• Description
The MF DIAL is not functioning.
Check and Cause
1. Check that the telephone line cord supplied with the set is connected to TEL LINE correctly.
2. Listen for a CLICK sound when the KEY is pressed.
3. Check the connection of the HARNESS between the LIU and the Main B'd.
4. Check that the SPEAKER is connected correctly.
Solution
1. If the telephone cord is OK but there is no dial tone, try plugging a normal telephone into the wall socket. If this is OK then replace the LIU B'd.
2. If you cannot hear the OHD CLICK sound, the OPE
Ass'y may be defective. Replace the OPE Ass'y.
(After key click sound sets to “ON”, and you can hear click sound)
3. Check the Speaker connection and the harness between the LIU and the Main PBA, replace as necessary.
4. Use Tech mode / Modem Test to check that the speaker and amplifier are working. Replace the LIU and Main B'd in sequence
Notes: Product supports MF DIAL type only.
Service Manual
6-23
Samsung Electronics
Troubleshooting
6.6.3 Defective FAX FORWARD/RECEIVE
• Description
FAX FORWARD/RECEIVE is not functioning.
Check and Cause
1. Check that you can hear a dial tone by pressing
OHD.
2. Check that you can hear a RECEIVE tone when
MODEM testing in TECH Mode.
Solution
1. If MODEM testing is normal and there is no dial tone, then try replacing the LIU B'd.
2. If testing the MODEM shows a fault replace the
Main B'd.
6.6.4 Defective FAX FORWARD
• Description
RECEIVE is functioning, but FORWARD is not functioning or received data is corrupt.
Check and Cause
1. Check if there is a NOISE line by pressing on-hook dial and listening.
2. Check that the destination fax machine can receive forwarded faxes by using a different sending fax machine (preferably from the same wall socket).
3. Check the cable between the set and the wall socket for damage.
Solution
1. If you can hear a noisy line when using on-hook dial, replace or repair the telephone line
2. Replace LIU.
3. Replace the line cord.
6-24
Service Manual
Samsung Electronics
Troubleshooting
6.6.5 Defective FAX RECEIVE (1)
• Description
FORWARD is functioning, but RECEIVE is not functioning or the received data is corrupt.
Check and Cause
1. Check if there is a NOISE line by pressing on-hook dial and listening
2. Use a different fax machine to receive from the same sender (if possible on the same wall socket).
Solution
1. If you can hear a noisy line when using on-hook dial, replace or repair the telephone line.
2. Replace the LIU.
6.6.6 Defective FAX RECEIVE (2)
• Description
Received data are lengthened or cut in the printing.
Check and Cause
1. Check if there is a NOISE line by pressing on-hook dial and listening
2. Ask sender to send to another fax machine
(if possible connected to the same wall socket)
Solution
1. If you can hear a noisy line when using on-hook dial, replace or repair the telephone line
2. Replace LIU or main PBA in sequence.
6.6.7 Defective FAX RECEIVE (3)
• Description
The phone is ringing continuously, but it set does not answer the call.
Check and Cause
Check that the RECEIVE Mode is set to FAX MODE.
Solution
If the fault persists even when the RECEIVE Mode is changed to FAX MODE then replace the LIU and the
Main B'd in sequence.
Service Manual
6-25
Samsung Electronics
Troubleshooting
6.6.8 Defective FAX RECEIVE (4)
• Description
Received data is reduced by more than 50% in the printing.
Check and Cause
Check the FAX status of the forwarding side.
Solution
This is a problem with the sending fax machine.
Correct the setting on the remote machine..
6.6.9 Defective Automatic Receiving
• Description
The automatic receiving function is not working.
Check and Cause
1. Check that the RECEIVE Mode is set to FAX
MODE.
Solution
1. If the RECEIVE Mode is set to the TEL MODE, reset it to the FAX MODE.
2. Even after the RECEIVE Mode is changed to the FAX
Mode, the problem persists then try to replace the LIU and the Main B'd in sequence.
6-26
Service Manual
Samsung Electronics
Troubleshooting
6.7 Copy Problems
6.7.1 White Copy
• Description
Blank page is printed out when copying.
Check and Cause
1. Check the Scanner Cover is properly closed.
2. Check shading profile.
3. Check white/black reference voltage on Main PBA.
Solution
1. Room light can pass through a thin original.
2. Redo shading profile in the tech mode.
3. Replace the Main PBA.
6.7.2 Black Copy
• Description
Black page is printed out when Copying.
Check and Cause
1. Check for CIS problem on the Main PBA.
2. Check shading profile.
Solution
1. Check the CIS FFC Cable is properly connected.
2. Redo shading profile in the tech mode.
Service Manual
6-27
Samsung Electronics
Troubleshooting
6.7.3 Abnormal noise
• Description
There is noise from the ADF when copying.
Check and Cause
1. Check the Scanner Motor, gearbox and rollers.
2. Check the Motor Driver on Driver PBA.
Solution
1. Check for correct assembly of gears and motor.
Ensure no parts are fouling and there are no foreign objects in the mechanism or scanner path. Replace any worn parts
2. Replace the main PBA and ADF PBA in seguence.
6.7.4 Defective Image Quality
• Description
The copied image is excessively light or dark
Check and Cause
1. Check shading profile.
2. Check the gap between original and scanner glass.
3. Check printing quality.
Solution
1. Redo shading profile in the tech mode.
2. A gap of more than 0.5 mm can cause a blurred image. Ensure rollers and cover close correctly.
Replace as necessary.
3. See "Print" troubleshooting.
6-28
Service Manual
Samsung Electronics
Troubleshooting
6.8 Scanning Problems – Causes and Solutions
6.8.1 PC Scanning problems
• Description
Unable to scan using a PC.
Check and Cause
1. Check the Cable (USB or Parallel) is properly connected and that the printer can print correctly.
2. Check that the driver is installed properly.
3. Check that the copy function operates normally.
Solution
1. Reconnect the PC and printer, replace any faulty cables. If using a parallel cable, check that the parallel port is properly configured in the BIOS.
2. If printing is OK check that the Scan driver is also installed (Refer to User's Manual.)
3. If the copy function works, replace the Main PBA.
If the copy function doesn't work, replace the CIS
Ass'y and try again.
6.8.2 Poor Quality of PC Scanned images
• Description
The image PC scanned is not clear or bad.
Check and Cause
1. Use TECH mode to carry out a shading test and examine the waveform printout.
2. Check if the resolution is set too low in PC Scan options. (Refer to User's Manual.)
Solution
1. If the CIS waveform form is abnormal replace the
CIS Ass'y.
2. Teach the user about scanner resolution – refer to the User Guide.
Service Manual
6-29
Samsung Electronics
Troubleshooting
6.9 Toner Cartridge Service
Only toner cartridges supplied by Samsung should be used. Printing defects or set damage caused by the use of non-approved toner cartridges or un-licensed toner refills are not covered by the guarantee.
6.9.1 Precautions on Safe-keeping of Toner Cartridge
Excessive exposure to direct light for more than a few minutes may cause damage to the cartridge.
6.9.2 Service for the Life of Toner Cartridge
If the printed image is light due to the toner supply becoming low 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 permanently.
6.9.2.1 Redistributing Toner
When the toner cartridge is near the end of its life, white streaks or light print occurs. The LCD displays the warning message, “Toner Low.” You can temporarily reestablish the print quality by redistributing the remaining toner in the cartridge.
6.9.3 Standard of guarantee for consumable parts.
Please refer to User's Manual or Instructions on Fax/Printer Consumables SVC manual for the criteria for judging the quality of consumable parts the standard of guarantee on those parts.
• Spotting a refilled cartridge by eye.
One way security screws are used in the manufacture of the cartridge – check if these are damaged.
6-30
Service Manual
Samsung Electronics
Troubleshooting
6.9.4 Error messages in the LCD window related to toner.
This section explains messages on the LCD that are related to the data stored in the EEPROM in the toner cartridge.
6.9.4.1 Toner Low
- Explanation: The amount of toner remaining is less than 10%
- Solution: The cartridge is almost empty or life-expired – replace the cartridge.
6.9.4.2 Toner Empty
- Explanation: The toner cartridge is empty
- Solution: Replace the cartridge.
6.9.4.3 Drum Warning
- Explanation: This message appears when the OPC drum is nearing the end of its life (14,000pages). This means that the life of the mechanical parts in the cartridge has expired (this is not an indication of toner remaining).
- Solution: After printing about 15,000 pages, in a worst case scenario, the waste toner collector might overflow and it may cause the system to fail. Also after 15,000 pages the OPC drum surface will be becoming worn and print quality will degrade, print images will become misty. It is therefore necessary to replace the cartridge even though there may be toner left in it.
When this message occurs there are approximately 1,000 pages left.
6.9.4.4 Replace Drum
- Explanation: The toner cartridge mechanical life is expired.
- Solution: Replace the cartridge.
Service Manual
6-31
Samsung Electronics
Troubleshooting
6.10 Software Problems – Causes and Solutions
6.10.1 The printer is not working (1)
• Description
While Power turned on, the printer is not working in the printing mode.
1. Run Self-Test Mode: using the menu buttons print the test page.
Check and Cause
2. Check that the PC and the printer are properly connected and that the toner cartridge installed correctly.
3. Printing is not working in the Windows.
4. Check that the printer cable is directly connected to the printer.
Solution
1. If the test print works that means there are no problems in the printer itself. If the test printing does not work that means the printer is faulty and the problem is not due to computer software or driver settings.
2. Replace the printer cable. If the problem is not solved even after the cable is replaced, check the amount of the remaining toner. (refer to Toner
Cartridge Service 7-6, Page 7-25)
3. Check that the connection between PC and printer port are correcct. If you use windows, check that the printer driver in the controller is set up correctly set up, the correct port is selected and ‘Use On-line’ is selected in the driver. If the printer driver is properly set up try printing a test page from the driver properties. Check in which program printing is not working.
Try opening ‘Note Pad’ and printing. If the printer is not working in a certain program, adjust the setup within that program.
Sometimes, the printout is normal within the
Windows basic programs, but it's not working in a particular program. In this case, uninstall and reinstall the new driver. If the printer is not working in the Windows basic programs and you are printing using the parallel port check the port setting in
CMOS is on ECP and that the address is IRQ 7 and 378 (for parallel port 1). Try using USB instead of parallel – or vice versa.
4. If you have other devices that need to share the printer port try temporarily disconnecting these devices and perhaps even uninstalling their drivers) to ensure the printer works by itself. If you are using a USB hub try connecting directly to the back of the
PC instead.
6-32
Service Manual
Samsung Electronics
Troubleshooting
6.10.2 The printer is not working (2)
• Description
After receiving the print command there is no response at all or print speed is low due to wrong setup of the environment rather than malfunction of the printer itself.
Check and Cause
1. Ensure you have sufficient free hard disk space for the temporary work files created during printing.
2. Printing error occurs even if there is enough space in the hard disk.
3. Check the parallel-port-related items in the CMOS
Setup.
4. Reboot the system to print.
Solution
1. Not working with the message 'insufficient printer memory' means there is a hard disk space problem rather than a printer RAM problem. In this case provide more space on the hard disk. Secure more space using the disk utilities program.
2. The connection of the cable and printer port is not correct. Check that the cable is properly connected and if you are using the parallel port check that the port settings in CMOS is correct.
3. For the printer port, Select ECP. SPP and normal normal modes support 8-bit data transfer, while
ECP Mode supports 12-bit data transfer.
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
Service Manual
6-33
Troubleshooting
6.10.3 Abnormal Printing
• Description
Printing does not work – even after replacing the cable
Printer does not work at all or strange fonts are printed,
Check and Cause
1. Set up the parallel port using CMOS SETUP.
2. Printer Driver Error.
3. Error message “insufficient memory”.
(The printing job sometimes stops due to insufficient virtual memory, this is caused by insufficient space on the hard disk.)
Solution
1. Ensure that ECP (best) or SPP is selected in the
CMOS (BIOS) setup.
2. Ensure that the correct driver is loaded. Use the driver supplied on the CD or downloaded from the
Samsung web site. DO NOT use the Microsoft driver supplied with the Windows operating system.
If the printer is a GDI or SPL type printer ensure that
ALL OTHER GDI or SPL drivers are uninstalled as
Windows allows only 1 of this type of driver to be loaded.
3. Delete any unnecessary files to secure enough space on the hard disk and start the print job again.
6-34
Service Manual
Samsung Electronics
Troubleshooting
6.10.4 SPOOL Error
• Description
SPOOL (simultaneous peripheral operations online) is the process Windows uses to manage print jobs. Jobs are processed and then stored on the hard disk until the printer is ready to accept them
Check and Cause
1. Insufficient space on the hard disk in the directory assigned for the basic spool.
2. If previous printing errors were not solved.
3. There may be conflict with other drivers or programs.
Solution
1. Delete any unnecessary files to provide more space for spool storage.
2. There may be files from previous failed print jobs on the hard disk with the name in the form ‘*.jnl’.
Delete these files and Reboot Windows to restart the printer.
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 the OS are damaged or virus infected.
6. Memory is less than suggested.
5 After rebooting the computer, check for viruses, restore the damaged files and reinstall the application program which is not working properly.
6. Add up more 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 delete in the menu.
If the job you are deleting is the current job when you delete the job data that has already been transferred to the printer’s memory will still be printed. If there is a problem with the printer (out of toner, offline, out of paper etc.) the job may take a long time to delete as it must wait for a time out.
Service Manual
6-35
Samsung Electronics
Troubleshooting
6.11 Windows Problems
Problem Solution
After installing PortThru the print server name is not displayed under New Print Server in
SyncThru.
The print server name is displayed, but the test page is not printed.
1. Verify that the printer power switch is turned on and the 'READY' message is displayed on the printer front panel.
2. Verify that the LAN cable is plugged into the PortThru card.
3. There are 2LEDs on the PortThru card. One should flash irregularly and the other should be on. If this is not the case ensure that the network card is properly installed and the PCB an cable connectors make a good connection. If the problem continues check the network cable / socket by using a different cable or socket. If the problem continues replace the network card.
4. Confirm that the print server and the PC which searches for the
New Print Server is on the same LAN (correct IP and subnet mask settings). If you want to search for a New Print Server your
PC and the print server should be on the same LAN.
Using the front panel menus print the Network configuration. If the
Network menu is not displayed or the configuration page is not printed turn off the printer, ensure the network card is properly fitted then turn it back on and try again. If the problem continues replace the network card.
SyncThru indicates that firmware upgrade is complete but when the network configuration is printed the software version has not changed.
Before attempting to upgrade firmware ensure that computer and printer can communicate using a Ping command.
SycThru is unable to automatically detect the printer.
The printer does not print via a network connection.
1. Check that the LAN cable is connected to the printers. If an IP address is assigned to the computer and printer ensure that the
Ping command can see the printer.
If an IP address is not allocated to the printer or it is in a different
LAN segment then ensure that either IPX/SPX or DLC/LLC protocols are enabled on the computer.
2. Print the network configuration. If the TCP/IP or Network protocols are disabled in the printer either use the front panel to reenable them or ensure that DLC/LLC protocol is installed in the computer.
3. In SyncThru use the Settings / Protocol Selection menu option to select either TCP/IP or IPX protocols and then use the
View/Refresh option to scan the network again.
4. Ensure that the network cable and wall socket are functioning correctly.
5. Ensure that the version of SyncThru is the same as or newer than the version supplied with the printer.
6. Ensure that there is no router between the printer and the computer as SyncThru will not work through a router.
7. Ensure there are no Switch or Router VLAN or Access Control
Lists which are blocking communication between the printer and the computer.
Note Windows XP does not support DLC/LLC protocols.
1. Connect the printer using a Parallel or USB cable and ensure that the computer can print. If not check that the printer drivers are installed correctly
2. If the printer can print via a local connection check Printer
Properties / Ports and ensure that a TCP/Ip port has been allocated to the printer.
6-36
Service Manual
Samsung Electronics
Troubleshooting
6.12 SyncThru Installation Problems
Problem Solution
"File Transfer Error" message appears during the Installation process.
1. Make sure that any previously installed version of SyncThru is uninstalled. Restart your PC after uninstalling previous versions.
2. If the problem continues, In Windows 95/98 boot into MS/DOS mode and delete the "sammon.dll" file in the windows\system directory the restart Windows and reinstall SyncThru. In Windows
NT stop the spooler service using' Services 'in Control Panel, delete the "sammon.dll" file in the windows\system32 directory then restart the spooler service and reinstall SyncThru.
'Unable to add the Port list of Samsung ports' message appears when you add a port.
Verify that your PC restarts after installing SyncThru.
Samsung Electronics
Service Manual
6-37
7
7. Exploded Views and Parts List
Contents
7.1 Main
7.2 Cover Housing
7.3 Front Cover
7.4 Rear Cover
7.5 Frame Ass'y
7.6 ADF Ass'y
7.7 Platen Cover Ass'y
7.8 Platen Ass'y
7.9 OPE Unit
7.10 RX Drive Unit
7.11 MP Tray
7.12 Fuser Unit
7.13 Paper Path Ass'y
7.14 Pick Up Unit
Exploded Views & Parts List
7-10
7-11
7-12
7-13
7-14
7-15
7-6
7-7
7-8
7-9
7-2
7-3
7-4
7-5
Samsung Electronics
Service Manual
7-1
Exploded Views & Parts List
7.1 Main
7-2
Service Manual
Samsung Electronics
7.2 Cover Housing
Exploded Views & Parts List
Samsung Electronics
Service Manual
7-3
Exploded Views & Parts List
7.3 Front Cover
3
4
1
7-4
Service Manual
0
5
6
2
Samsung Electronics
7.4 Rear Cover
0
4
3
7
6
5
1
2
Exploded Views & Parts List
Service Manual
7-5
Samsung Electronics
Exploded Views & Parts List
7.5 Frame Ass'y
7-6
Service Manual
Samsung Electronics
7.6 ADF Ass'y
Exploded Views & Parts List
Samsung Electronics
Service Manual
7-7
Exploded Views & Parts List
7.7 Platen Cover Ass'y
0
7-8
Service Manual
13
8
8
12
11
12
11
10
9
8
10
1
2
Samsung Electronics
7.8 Platen Ass'y
Exploded Views & Parts List
Samsung Electronics
Service Manual
7-9
Exploded Views & Parts List
7.9 OPE Unit
0
14
7-10
Service Manual
4
17
3
15
16
5
13
11
6
10
7
12
2
8
9
1
Samsung Electronics
7.10 RX Drive Unit
Exploded Views & Parts List
Samsung Electronics
Service Manual
7-11
Exploded Views & Parts List
7.11 MP Tray
0
2
1
7-12
Service Manual
4
5
3
Samsung Electronics
7.12 Fuser Unit
Exploded Views & Parts List
Samsung Electronics
Service Manual
7-13
Exploded Views & Parts List
7.13 Paper Path Ass'y
7-14
Service Manual
Samsung Electronics
7.14 Pick UP Unit
Exploded Views & Parts List
Samsung Electronics
Service Manual
7-15
ΒΣΥΤ͑ͽΚΤΥ
Service Parts List(Model: SCX-4725FN/XAZ)
Drawer#
7.1-0
7.1-1
7.1-2
7.1-3
7.1-4
7.1-5
7.1-6
7.1-7
7.1-8
7.1-25
7.1-26
7.1-26-1
7.1-27
7.1-28
7.1-29
7.2-0
7.2-1
7.2-2
7.2-2-1
7.2-2-2
7.2-2-3
7.2-2-4
7.2-3
7.2-4
7.2-5
7.2-5-1
7.2-5-2
7.2-5-3
7.3-0
7.3-1
7.3-2
7.3-3
7.3-4
7.1-9
7.1-10
7.1-11
7.1-12
7.1-13
7.1-14
7.1-15
7.1-16
7.1-16-1
7.1-16-2
7.1-18
7.1-19
7.1-20
7.1-21
7.1-23
7.1-24
SEC_Code
Service(SA:service available,SNA:service not available)
Description
3903-000020
JG61-40001A
JC96-04216A
JC97-02784A
JC96-04220A
JC63-01176A
3001-001494
GB70-10500A
JC72-01382A
JC63-01177A
JC96-04219A
JC97-02785A
JC63-01180A
JC72-01351C
JC63-01250A
JC97-02784A
JC63-01179A
JC63-01188A
JC63-00628D
JC63-01112A
SCX-4725FN/XAZ SET
JC96-04230A
JC96-04065A
ELA HOU-FRAME_LOWER
ELA UNIT-LSU
JC39-00642A
JC96-03352V
HARNESS-LSU
ELA UNIT-DEVE INITIAL
JC96-04229A
JC63-01190A
JC63-00631A
JC44-00133A
ELA HOU-FUSER
SHIELD-ENGINE
GROUND-P-HVPS
SMPS-V1
JC92-01793B
JC39-00641A
6103-000117
6502-000132
6502-000132
3103-001085
JC39-00228A
JC96-01672A
JC70-40912A
JC61-00031A
JC44-00132A
JC63-00722A
JC63-01191A
JC92-01855A
JC39-00644A
JC96-04216A
JC97-02239C
JC96-04237Q
JC67-00087A
JC63-01204A
PBA SUB-LIU
HARNESS-LIU
SUPPORTER
CABLE CLAMP
CABLE CLAMP
FAN-DC
CBF HARNESS-GND
ELA UNIT-TERMINAL TR L
ICT-SHAFT HV LARGE
SPRING ETC--HV LARGE
HVPS
SHEET-HVPS
SHIELD-PBA
PBA-MAIN
HARNESS-SENSOR_JOINT
ELA HOU-COVER
MEA UNIT-MP TRAY
ELA HOU-SCAN
CAP-M-HINGE
COVER-PAPER
CBF-POWER CORD
FOOT-SF4000
ELA HOU-COVER
MEA-COVER_FRONT
ELA HOU-COVER SIDE L
COVER-SIDE_L
SPEAKER
IPR-UNIT FIXING BRAC
SPONGE-COVER SIDE L
COVER-SIDE_R
ELA HOU-COVER REAR
MEA-COVER_MIDDLE
COVER-MIDDLE
PMO-STACKER
SHEET-FAN
MEA-COVER_FRONT
COVER-FRONT
TRAY-CASSETTE_LOWER
TRAY-EXTENSION_L
TRAY-M_EXTENSION S
QT'y Service
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
3
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
2
1
SA
SA
SA
SNA
SA
SA
SNA
SA
SA
SNA
SA
SA
SNA
SA
SA
SA
SNA
SA
SNA
SA
SNA
SNA
SNA
SNA
SA
SA
SA
SA
SA
SNA
SA
SA
SNA
SA
SA
SNA
SA
SA
SA
SNA
SA
SA
SA
SNA
SA
SNA
SNA
SA
͢
Drawer#
7.5-19
7.5-20
7.5-20
7.5-21
7.5-22
7.6-0
7.6-1
7.6-1-1
7.6-1-2
7.6-1-2-1
7.6-1-2-2
7.5-8
7.5-9
7.5-10
7.5-11
7.5-12
7.5-13
7.5-13-1
7.5-14
7.5-15
7.5-16
7.5-18
7.4-7
7.5-0
7.5-1
7.5-2
7.5-2-1
7.5-2-2
7.5-2-3
7.5-3
7.5-5
7.5-6
7.5-7
7.3-5
7.3-6
7.4-0
7.4-1
7.4-2
7.4-3
7.4-4
7.4-5
7.4-6
7.6-1-2-3
7.6-1-2-4
7.6-1-2-5
7.6-1-2-6
7.6-1-2-7
7.6-1-2-8
7.6-1-2-9
7.6-1-3
7.6-1-4
7.6-1-5
7.6-1-6
7.6-1-7
7.6-1-8
7.6-1-9
ΒΣΥΤ͑ͽΚΤΥ
SEC_Code
JG66-40003A
JC61-00836A
JC61-01258A
JC61-01259A
JC31-00027A
JC96-03797A
JC92-01763A
JC63-00622A
JC66-01257A
JB61-00076A
JC66-00813A
JC66-01218A
JC39-00480A
JC72-41142A
JC61-00047A
JC72-41145D
JC96-04232A
JC96-04233A
JC63-00656C
JC96-03379A
JC66-00458A
JC66-00322A
JC63-01203A
JC63-01189A
JC96-04219A
JC63-01178A
JC63-01192A
JC92-01858A
JC67-00202A
JC63-01194A
JC66-01304A
JB61-00107A
JC96-04230A
JC61-01703A
JC97-02670A
JC61-01709A
JC66-00720A
JC74-00011A
6107-001163
JC66-00808A
JC70-00527A
JC70-00528A
JC66-00457A
JC66-00455A
JC66-00456A
JC61-01180A
JC31-00036A
JC66-00556A
JC61-01178A
JC92-01845A
JC63-00667A
JC39-00407A
JC66-00560A
JB72-00819A
JC66-00460A
6044-000159
Service(SA:service available,SNA:service not available)
Description QT'y Service
TRAY-CASSETTE_R
TRAY-CASSETTE _L
ELA HOU-COVER REAR
COVER-REAR
COVER-JAM
PBA SUB-SENSOR
CAP-JAM
COVER-FUSER_REAR
ACTUATOR-EXIT
SPRING ETC-LEVER SENSOR
ELA HOU-FRAME_LOWER
FRAME-M_BASE
MEA UNIT-KNOCK_UP
PLATE-KNOCK_UP
SHAFT-P-CORE
MPR-PAD KNOCK UP MP
SPRING-CS
GEAR-FEED DR 41
ADJUST-CASSETTE_L
ADJUST-CASSETTE_R
GEAR-PINION
FOOT-FRONT
SPRING ETC-TORSION DEVE_L
SPRING ETC-TORSION DEVE_R
FAN-DC_HUMMINGBIRD
ELA HOU-CRUM
PBA SUB-CRUM_P
GROUND-P-OPC
ACTUATOR-EMPTY
SPRING ETC-TORSION DOC (CC2-F)
GEAR-TRANSFER
ROLLER-TRANSFER
CBF HARNESS-MAINMOTOR
PMO-BUSHING TR
SPRING ETC-TR L HAWK
PMO-TRANSFER HOLDER L
ELA HOU-ADF
ELA HOU-ADF LOWER
COVER-ADF LOWER
ELA HOU-ADF MOTOR
GEAR-IDLE 35 ADF
GEAR-CLUTCH 39
GEAR-SWING 31/20 ADF
GEAR-58/25 ADF
GEAR-40/21 ADF
BRACKET-P-MOTOR
MOTOR STEP-ADF
IMPELLER-ADF
BRACKET-M-GEAR
PBA SUB-ADF
GROUND-P-ADF
CBF HARNESS-ADF
ROLLER-DRIVE
PMO-BUSH
SHAFT-M-FEED GEAR 38
RING-C
1
1
1
1
1
1
1
3
1
1
1
1
1
1
1
2
1
1
1
1
1
1
2
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
4
1
1
1
1
1
SA
SA
SNA
SA
SNA
SA
SA
SNA
SA
SA
SA
SA
SA
SA
SA
SA
SNA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SNA
SA
SA
SA
SA
SA
SA
SA
SA
SNA
SNA
SA
SNA
SNA
SA
SNA
SNA
SNA
SA
SA
SA
SA
SA
SA
ͣ
Drawer#
7.7-8
7.7-9
7.7-10
7.7-11
7.7-12
7.7-13
7.8-0
7.8.1
7.8-1-1
7.8-1-2
7.8-1-2-1
7.6-3-2
7.6-3-3
7.6-3-4
7.7-0
7.7-1
7.7-2
7.7-3
7.7-4
7.7-5
7.7-6
7.7-7
7.8-1-2-2
7.8-1-2-3
7.8-1-2-4
7.8-1-2-5
7.8-1-2-6
7.8-1-2-7
7.8-1-3
7.8-1-4
7.8-1-5
7.8-1-6
7.8-1-7
7.8-1-8
7.8-1-9
7.8-1-11
7.6-1-10
7.6-1-11
7.6-1-12
7.6-1-13
7.6-1-14
7.6-1-15
7.6-1-16
7.6-1-17
7.6-1-18
7.6-2
7.6-2-1
7.6-2-2
7.6-2-2-1
7.6-2-2-2
7.6-2-2-3
7.6-2-2-4
7.6-2-3
7.6-2-4
7.6-3
7.6-3-1
ΒΣΥΤ͑ͽΚΤΥ
SEC_Code
JC97-02203A
JB72-00819A
JB72-00843A
JC97-02802A
JC63-00659C
JC63-00209A
JB72-01166D
JC61-00833C
JC61-00834C
JF70-10616A
JG66-40003A
JC61-00011A
JF70-40521B
JG72-40663A
JC66-00909A
JC73-00091A
JC97-02803A
JC96-04235A
JC96-04236A
JC63-00660B
JC96-02655A
JC61-00698A
JC72-01011A
6107-001163
JC75-00095A
JB61-00076A
JC61-01179A
JC72-01009A
JB66-00101A
JC72-01010A
JC66-00559A
JC97-02804A
JC63-00657C
JC97-01709A
JC61-00694A
JC63-00243A
JB73-00052A
JC61-00387A
JC61-00712A
JC66-00594A
JC97-02801A
JC63-00658C
JB31-00011A
JB66-00082A
JB72-01136A
6044-000125
JB66-00083A
JB66-00084A
0609-001223
JC39-00408A
JC66-00838A
JB72-01136A
JB72-01136A
JB72-00763A
JB61-00109A
JB96-01381A
Service(SA:service available,SNA:service not available)
Description QT'y Service
PMO-ACTUATOR SCAN SENSOR
SPRING-CS
MEC-BRUSH ANTISTATIC
SPRING ETC-TORSION DOC (CC2-F)
PLATE-M_WHITE BAR
PMO-ACTUATOR DOC SENSOR
GEAR-CLUTCH 29
PMO-ACTUATOR REGI SENSOR
ROLLER-EXIT
MEA UNIT-ADF UPPER
COVER-ADF UPPER
MEA UNIT-HOLDER ADF
HOLDER-M-ADF
SHEET-ADF HOLDER
RMO-ADF RUBBER
SPRING ETC-PAD
GUIDE-STACKER SUB
SHAFT-STACKER
MEA UNIT-COVER OPEN
COVER-ADF OPEN
MEA UNIT-PICKUP
PMO-BUSH
PMO-GUIDE PAPER
MEA UNIT-COVER PLATEN
COVER-PLATEN
SHEET-WHITE SPONGE
PMO-TX STACKER
GUIDE-DOC_R
GUIDE-DOC_L
IPR-WASHER SPRING CU
GEAR-PINION
SPRING ETC-FEED
ICT-SHAFT PINCH
PMO-ROLL PINCH
SHAFT-IDLE FEED
RPR-ROLLER EXIT IDLE
MEA UNIT-TX STACKER
ELA HOU-PLATEN
ELA HOU-SCAN LOWER
COVER-SCAN LOWER
ELA HOU-SCAN MOTOR
BRACKET-M-SCAN MOTOR
MOTOR STEP-SCAN
GEAR-TIMING
PMO-HOLDER BELT
RING-E
GEAR-IDLE
GEAR-REDUCTION
CONTACT IMAGE SENSOR
CBF SIGNAL-CIS FFC
SHAFT-CIS
PMO-HOLDER BELT
PMO-HOLDER BELT
PMO-PULLEY
SPRING ETC-BELT
ELA UNIT-CORE
2
2
2
6
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1
1
1
1
1
3
1
1
3
1
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SNA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SNA
SA
SA
SA
SA
SA
SA
SA
SA
SNA
SA
SA
SA
SA
SA
SA
SA
SA
SA
ͤ
Drawer#
7.10-6
7.10-7
7.10-8
7.10-9
7.10-10
7.10-11
7.11-0
7.11-1
7.11-2
7.11-3
7.11-4
7.9-12
7.9-13
7.9-14
7.9-15
7.9-16
7.10-0
7.10-1
7.10-2
7.10-3
7.10-4
7.10-5
7.11-5
7.12-0
7.12-1
7.12-2
7.12-3
7-12-4
7.9-1
7.9-2
7.9-3
7.9-4
7.9-5
7.9-6
7.9-7
7.9-8
7.9-9
7.9-10
7.9-11
7.8-1-12
7.8-1-13
7.8-1-14
7.8-2
7.8-2-1
7.8-2-2
7.8-2-3
7.8-2-4
7.9-0
7.12-5
7.12-6
7.12-7
7.12-8
7.12-9
7.12-10
7.12-11
7.12-12
ΒΣΥΤ͑ͽΚΤΥ
SEC_Code
JC64-00060F
JC64-00056G
JC39-00412A
JC64-00059E
JC72-00672A
JC96-04033A
JC61-01727A
JC60-00023A
JC66-00804A
JC61-01708A
JC31-00068A
JC66-00805A
6044-000159
JC66-00806A
6031-000023
JC66-01244A
JC72-00825A
JC97-02239C
JC61-01263C
JC70-00514C
JC70-00515C
JG66-40003A
JC63-00711A
JC96-04229A
JC63-01126A
4712-001032
JC39-00403A
JC39-00404A
4302-001183
JC96-02417A
6602-001067
JC97-02805A
JC63-00661C
JB68-00644A
JB01-00002A
JB01-00001A
JC96-04234Q
JC63-01213Q
JC73-00202A
JC73-00203A
JC92-01727A
JC64-00054F
JC63-00076A
JC64-00053G
JC64-00157D
JC64-00058A
JC64-00187A
JC64-00114A
1404-001373
JC67-00085A
JC61-01747A
6107-001163
JC61-01172A
JC66-01311A
JC66-00934A
6107-001291
Service(SA:service available,SNA:service not available)
Description QT'y Service
BATTERY-NIH(2ND)
ELA HOU-FULL SENSOR HARNESS
BELT-TIMING GEAR
MEA UNIT-SCAN UPPER
COVER-SCAN UPPER
LABEL(P)-SHADING
GLASS-PLATEN
GLASS-ADF
ELA HOU-OPE
COVER-OPE
RUBBER-TEL
RUBBER-SCROLL
PBA SUB-WHITNEY_OPE
KEY-COPY
COVER-WINDOW SF-530
KEY-TEL
KEY-SCAN TO
KEY-M-TONER SAVE
KEY-M-STOP
KEY-M_START
KEY-FAX
KEY-SCROLL
CBF HARNESS-OPE
KEY-RESOLUTION
PCT-LCD WINDOW
ELA UNIT-RX DRIVE
BRACKET-P_GEAR
SPACER-GEAR
GEAR-RDCN 139/83
BRACKET-P_MOTOR
MOTOR STEP
GEAR-RDCN 113/83
RING-C
GEAR-OPC DR 76/38/29
WASHER-PLAIN
GEAR-FUSER DRIVER
PMO-IMPELLER_DRV
MEA UNIT-MP TRAY
PLATE-MP
ADJUST-MP L
ADJUST-MP R
GEAR-PINION
SHEET-MP
ELA HOU-FUSER
COVER-FUSER
THERMOSTAT
CBF HARNESS-FUSER(110V)
CBF HARNESS-FUSER JOINT
THERMISTOR-NTC ASSY
CAP-M-THERMO
HOLDER-SPRING
SPRING-CS
HOLDER-M-EXIT F/DOWN
ROLLER-EXIT_MAIN
ROLLER-M_EXIT FR
SPRING-ES
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
3
3
3
1
1
3
3
4
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SNA
SA
SA
SA
SA
SA
SA
SA
SNA
SA
SNA
SA
SA
SNA
SA
SNA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SNA
SA
SA
SNA
SNA
SNA
SNA
ͥ
Drawer#
7.13-3
7.13-4
7.13-5
7.13-6
7.13-7
7.13-8
7.13-9
7.13-9-1
7.13-9-2
7.13-9-3
7.13-9-4
7.12-33
7.12-34
7.12-35
7.12-36
7.12-37
7.12-38
7.12-39
7.12-40
7.13-0
7.13-1
7.13-2
7.13-10
7.13-11
7.13-11-1
7.13-11-2
7.13-11-3
7.13-12
7.13-13
7.13-14
7.13-15
7.13-16
7.13-18
7.13-19
7.13-24
7.13-25-1
7.12-22
7.12-23
7.12-24
7.12-25
7.12-26
7.12-27
7.12-28
7.12-29
7.12-30
7.12-31
7.12-32
7.12-13
7.12-14
7.12-15
7.12-16
7.12-17
7.12-18
7.12-19
7.12-20
7.12-21
ΒΣΥΤ͑ͽΚΤΥ
SEC_Code
JC61-01719A
JC66-00810A
JC63-01193A
JC72-01001A
JC63-01195A
JC66-01303A
JC61-00049A
JC60-00024A
JC97-02664A
JC61-01710A
JC66-01250A
JB61-00107A
JC70-10232A
JC39-00482A
JC63-01125A
JC63-00623A
JC63-00625A
JC97-02669A
JC61-01711A
JC69-00987A
JC63-00290A
JC61-70911A
JC61-01721A
JC70-00064A
JC72-20902A
JC66-00801A
6031-000023
6044-000001
4713-001211
JC66-01256A
JC61-00887A
JC61-00888A
JC66-01254A
JC66-00600A
JC66-10901B
JC61-00056A
JC61-01770A
JC61-00595A
JC63-01129A
JC63-01130A
JC63-01245A
JC66-01255A
JC66-01247A
JC97-02665A
JC66-01245A
JC66-01246A
6107-001163
JC33-00015B
JC72-00382B
JC66-01251A
JC72-00102A
JC61-70940A
JC66-01252A
JC70-00307A
JC61-01715A
JC61-01718A
Service(SA:service available,SNA:service not available)
Description QT'y Service
GUIDE-CLAW
IPR-PIN ROLLER EXIT
PEX-ROLLER F/UP(2)
GEAR-EXIT_DR38/25
WASHER-PLAIN
RING-CS
LAMP-HALOGEN
ROLLER-HEAT
BUSH-M-HR R_R2
BUSH-M-HR L_R2
GEAR-FUSER
ROLLER-PRESSURE
BUSH-PRESSURE_ROLLER
SPRING ETC-PR(7300)
FRAME-FUSER
GUIDE-M-INPUT
COVER-LAMP_R
COVER-LAMP_L
SHEET-FUSER
ROLLER-EXIT F/DOWN
HOLDER-EXIT R
GEAR-EXIT_DRV17
COVER-FUSER_FRONT
PMO-SUB STACKER
COVER-FUSER_SAFETY
ACTUATOR-JAM
SPRING ETC-TR(KOR)
SPACER-FUSER
MEA UNIT-PAPER PATH
GUIDE-PAPER PATH
ACTUATOR-FEED SENSOR
SPRING ETC-LEVER SENSOR
IPR-PLATE SAW
CBF HARNESS-MICRO SW
GROUND-P_SAW
GROUND-P-THV
GROUND-P-VARISTOR
MEA UNIT-HOLDER_PAD
HOLDER-PAD
PAD-FRICTION
SHEET-HOLDER PAD
SPRING ETC-EXIT ROLL FD
GEAR-FEED
MEA UNIT-PICK UP GEAR
GEAR-PICK UP A
GEAR-PICK UP B
SPRING-CS
SOLENOID-MP_R2
PMO-BUSHING FEED
ROLLER-FEED
PMO-BUSHING_TR(L)
SPRING ETC-TR(12)
SHAFT-FEED
IPR-P-EARTH TRANSFER
PLATE-P_IDLE HOLDER
HOLDER-IDLE ROLLER
1
1
1
1
1
1
1
1
1
1
1
1
2
1
2
1
2
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
4
3
3
SA
SA
SA
SNA
SNA
SNA
SA
SA
SA
SA
SA
SA
SA
SNA
SA
SNA
SNA
SNA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SNA
SA
SNA
SNA
SNA
SNA
SNA
SA
SNA
SNA
SA
SNA
SNA
SNA
SA
SA
SA
ͦ
Drawer#
7.13-25-2
7.13-25-3
7.14-0
7.14-1
7.14-2
7.14-3
7.14-4
7.14-5
7.14-6
7.14-7
7.14-8
7.14-9
Replacement
Replacement
ΒΣΥΤ͑ͽΚΤΥ
SEC_Code
JC66-00529A
6107-001291
JB75-00300A
JC66-00829A
JC61-01281A
JC61-01717A
JC61-01716A
JC73-00239A
JC66-01253A
JC61-01713A
JC61-01714A
JC66-01258A
JC69-01026A
JF39-50094B
Service(SA:service available,SNA:service not available)
Description QT'y Service
ROLLER-M-IDLE FEED
SPRING-ES
MEC-PICK UP ROLLER ASSY
SHAFT-P-PICK_UP
BRACKET-P-BAR_PICK_UP
HOUSING-PICK UP B
HOUSING-PICK UP A
RUBBER-PICK_UP
ROLLER-PICK_UP IDLE
STOPPER-PICK_UP R
STOPPER-PICK_UP L
CAM-PICK_UP
BOX-MAIN
CBF LINE CORD
1
1
1
2
1
1
2
2
1
2
1
1
1
1
SA
SA
SA
SA
SNA
SA
SA
SA
SA
SA
SA
SA
SA
SA
ͧ
8
8. Block Diagram
8.1 System Block Diagram
Block diagram
Samsung Electronics
Service Manual
8-2
9
9. Connection Diagram
Connection Diagram
Samsung Electronics
Service Manual
9-1
Reference Information
10. Reference Information
10
of the tool list, the abbreviation table, the outline of model, and so on.
10.1 Troubleshooting Tool
The following tools are recommended safe and easy troubleshooting as described in this service manual.
•
DVM(Digital Volt Meter)
Standard : Indicates more than 3 digits.
• Cleaning Equipments
Standard : An IPA(Isopropyl Alcohol)dry wipe tissue or a gentle neutral detergent and lint-free cloth.
• Driver
Standard : "-" type, "+" type (M3 long, M3 short, M2 long, M2 short).
• Vacuum Cleaner
• Spring Hook
Standard : For general use
• Tweezers
Standard : For general home use, small type.
• Cotton Swab
Standard : For general home use, for medical service.
• Software (Driver) installation CD ROM
Service Manual
10-1
Samsung Electronics
Reference Information
10.2 Acronyms and Abbreviations(1)
The table below explains the abbreviations and acronyms used in this service manual. Where abbreviations or acronyms are used in the text please refer to this table.
Abbreviations
HV
HVPS
I/F
I/O
IC
IDE
EPP
FPOT
F/W
GDI
GND
HBP
HDD
H/H
DPI
DRAM
DVM
ECP
EDC
EEPROM
EMI
EP
CN
CON
CPU dB dbA dBM
DC
DCU
AP
AC
APC
ASIC
ASSY
BIOS
BLDC
CMOS
Explanation
Access Point
Alternating Current
Auto Power Control
Application Specific Integrated Circuit assembly
Basic Input Output System
Brush-less Direct Current
Complementary Metal Oxide Semiconductor connector connector
Central Processing Unit decibel decibel A decibel milliwatt direct current
Diagnostic Control Unit
Dot Per Inch
Dynamic Random Access Memory
Digital Voltmeter
Enhanced Capability Port
Embedded Diagnostic control
Electronically Erasable Programmable Read Only Memory
Electro Magnetic Interference electrophotographic
Enhanced Parallel Port
First Printout Time firmware graphics device interface ground
Host Based Printing
Hard Disk Drive
High temperature and high marshy place high voltage
High Voltage Power Supply interface
Input and Output integrated circuit
Intelligent Drive electronics or Imbedded Drive Electronics
10-2
Service Manual
Samsung Electronics
Reference Information
Acronyms and Abbreviations(2)
Abbreviations
PTL
PWM
Q-PID
Q ty
RAM
ROM
SCF
SMPS
OPC
OPE
PBA
PCL
PDL
PPM
PPS
PS
SPGP
SPL
Spool
SW sync
USB
WECA
L/L
LSU
MB
MHz
MPF
NIC
N/N
NVRAM
IEEE
IPA
IPM
LAN lb
LBP
LCD
LED
Samsung Electronics
Explanation
Institute of Electrical and Electronics Engineers. Inc
Isopropy Alcohol
Images Per Minute local area network pound(s)
Laser Beam Printer
Liquid Crystal Display
Light Emitting Diode
Low temperature and low marshy place
Laser Scanning Unit megabyte megahertz
Multi Purpose Feeder
Network Interface Card
Normal temperature and normal marshy place nonvolatile random access memory
Organic Photo Conductor
Operate Panel Equipment
Printed Board Assembly
Printer Command Language , Printer Control Language
Page Discription Language
Page Per Minute
Pulse Per Second
Post Script
Pre-Transfer Lamp
Pulse Width Modulation
Quick Printer Initiating Device quantity
Random Access Memory
Read Only Memory
Second Cassette Feeder
Switching Mode Power Supply
Samsung Printer Graphic Processor
Samsung Printer Language
Simultaneous Peripheral Operation Online switch synchronous or synchronization
Universal Serial Bus
Wireless Ethernet Compatibility Alliance
Service Manual
10-3
Reference Information
10.3 Selecting printer locations
• Leave enough room to open the printer trays, covers, and allow for proper ventilation. (see diagram below)
• Provide the proper environment :
- A firm, level surface
- Away from the direct airflow of air conditioners, heaters, or ventilators
- Free of extreme fluctuations of temperature, sunlight, or humidity
- Clean, dry, and free of dust
10-4
Service Manual
Samsung Electronics
Reference Information
10.4 Sample Tests Patterns
The sample patterns shown below are the standard test patterns used in the factory.
The life of the toner cartridge, developer cartridge and printing speed are measured with the pattern shown below. The A4 ISO 19752 standard pattern samples are reproduced reduced to 70% of the actual A4 size.
A4 ISO 19752 Standard Patterns
Samsung Electronics
Service Manual
10-5
Circuit Description
1 1
11.1 Engine Controller
The engine controller module consists of a motor controller, a PWM controller, a LSU I/F controller, and an ADC I/F controller.
11.1.1 Heater Control
ENGINE CONTROL PART
Vcc
FUSER
THERM Rs
D2
914T1
Vcc Vcc
D1
914T1
R1
R5
5.6K
R3
3
IC1
LM393D
1
2
R4
R6
5.6K
D3
914T1
R7
1K
TR2 KSC
1008-Y
C
B
E
BD2
CN1
1
R2
C1
10nF
TR1
KSC
1008-Y
C
E
B
C2
1nF
BD1
2
THERMISTOR
R21
1.5K
+24Vs
2
1
PC1
AC CONTROL PART
CHOKE
R22 180
FUSIBLE
TRIAC
C21
104
R23
100
R24
120
C22
103
H
N
AC
VOLTAGE
HEAT
LAMP
The heat lamp radiates heat by using AC power. The AC power is a TRIAC (a semiconductor switch device) which controls a switch. The ‘ON/OFF’ control is completed by turning on/off a gate of the TRIAC through a photo TRIAC which is insulation part.
If explaining more detail about the AC control part, it consists of passive circuit ; therefore, it turns on/off the heater by receiving the signal from the engine control part. If the heater on signal is turned on at the engine, electricity flows in as the LED of the PC1 (Photo TRIAC) is connected. Then, it emits light.
By this light, the TRIAC unit, a light receiving unit, becomes on, and electricity is supplied to the gate of the TRIAC.
Then, the TRIAC is turned on. As a result, AC current flows in a heat lamp, and the heat lamp radiates heat.
On the other contrary, if the signal is turned off, the PC1 becomes off, and the TRIAC is turned off due to no electricity at the gate of the TRIAC. Consequently, the heat lamp is turned off.
Special Feature of TRIAC (THY 1): 16A, 600V SWITCHING
Phototriac Coupler (PC3)
Turn On If Current: 15mA~50mA (Design: 16mA)
High Repeive Peak Off State Voltage: Min 600V
Service Manual
11-1
Samsung Electronics
Circuit Description
FUSER_THERM1 nFUSER_EN
3.3V
3.3V
D7
MMSD914T1 nFUSER_ON
R12
10K
3.3V
DGND
KDS226
D5
1
3
2
R39
1K
R37
7.5K,1%
3.3V
C32
1nF
R38
470K,5%
R36
5.1K
R13
33K
R14
15.4K
R15
14.7K
5
6
U2-2
7
LM393D
DGND
C339
10nF
3
2
1
Q2
MMBT2222ALT1
Not used
C31
100pF
1
3
2
Q6
MMBT2222ALT1
R16
5.1K
DGND
C18
10nF
1
3.3V
3
2
KDS226
D26
CN3-1
1
2
35301-0250
3
DGND
1 2
D4
KDS226
DGND
3.3V
CN3-2
DGND
Explanation about the condition of Normal Operation
If the fuser (P3.7) port becomes high, the Q6 is activated. A heat lamp starts operating by the activity.
As the temperature of the heat lamp is increased, the resistance value of the thermister is decreased.
Therefore, the electric potential of the circled A becomes low.
On/Off operation of the Q6 is only controlled by the fuser (P3.7) port because 5(+) of the
U11(Comparator) is always higher than 6 (-) within the normal control temperature rage.
Functions of the Malfunction Protection:
If the fuser port (P3.7) is turned on regardless of controlling due to system malfunction, the temperature of the heat roller goes abnormally high. At this time, the resistance value of the thermister becomes low.
When the resistance value of the thermister becomes low, the electric potential of the circled A gets low, and when the temperature goes over the certain temperature, the comparator (U11) gets a low output.
As a result, even though the fuser port is abnormally activated, it is disable to be over the regular temperature. For maintaining a regular temperature, a protect circuit consists in it (This protection is set up to start operating at the rage between 205°~210°)
11-2
Service Manual
Samsung Electronics
Circuit Description
11.1.2 PWM Controller
Function Description
PWM TIMER consists of each sub block which has various functions. The sub block is divided based on this block diagram. The entire diagram of the PWMTIMER is organized as below.
PWM TIMER OPERATION is figured out if calculating PHCLK by the value selected by the register setting and the divider. PHCLK is created by count block at the PWM TIMER
11.1.3 Motor Driver
A motor drive circuit is decided when selecting a driver IC. (Supplied by vendor) ML1610 uses the motor driver IC of
AN44060. However, the sensing resistance Rs value and the Vreference resistance value are variable according to the motor drive current value.
Service Manual
11-3
Samsung Electronics
Circuit Description
11.1.4 LSU Controller
The laser scanning unit controller (LSUC) of Jupiter4E is a block for interface between PVC block and LSU.
LSUC sends the video data received from PVC and the laser diode turn On/Off signal created by inner 21 bit counter to the laser diode of LSU. LSU creates the horizontal sync signal (nHSYNC) by sensing the inputted diode turn on/off signal with the attached sensor. nHSYNC is inputted to PVC and LSUC as a signal that informs the beginning of one line. Also, LSU makes the activity of nLREADY signal (ready to print) low when the polygon motor becomes regularly rotating. LSU can recognize the regular rotation status of the polygon motor by reading nLREADYFlag bit in SFR.
Once the polygon motor regularly rotates, it sends the page sync signal (nPSync) to PVC by writing ‘1’ at LSUCON[5] in LSUC, and PVC starts operating for one page printing. After that, every time nHSYNC signal is created, PVC senses the signal and outputs the video data (PVC_VDO) to LSUC. At this time, LSUC creates the video window (Printing area) and masks it on the video data sent by PVC. LSUC sends the completed video data (LSU_VDO) to the laser diode in LSU.
Also, LSUC supplies LSU_CLK, created by counting the system clock with the operation clock source of LSU, for the use of substitution for oscillator. The SFR is set up in IsuSfr block by receiving the bus control signal from APB bus, and the settled register values are redelivered to IsuCon block. IsuCon block creates a signal for controlling the laser diode of LSU and outputs it to a pad. The digital filter module is a digital filter to provide against the noise loaded in nHSYNC and nLREADY signal which directly get into the chip. It is three layer filter, and the delay time is 3*System
Clock Time.
The interface between PVC and LSUC is shown in the picture.
nHSYNC
LSUC nHSYNC
LSU_VDO
PVC_VDO nPSync
0
1
LSU_VDO
PVC_TEST_EN
PVC nLSYNC nFSYNC
PVC_TEST_EN
1
0 nFSYNC
VDO
11-4
Service Manual
Samsung Electronics
Circuit Description
APB
BRIDGE
PWRITE
PSEL
PENABLE
PADDR[4:0]
PWDATA[31:0]
PRDATA[31:0]
PVC nPSync
LSUC
DigiFilter nLREADY_FO
DigiFilter nHSYNC_FO nLREADY nHSYNC ls uSfr nLREADYFlag flagClear lsuControl[8:0] windowOnTime[20:0] windowOffTime[20:0] ldOnTime[20:0] ldOffTime[20:0] patternDuty[9:0] lsuClkDuty[18:0]
SHOnTime[20:0]
SHOffTime[20:0] lsu Con
DAC
LSU_CLK
LSU_VDO
DAC_OUT
ENGIN E
APCCON[11:0] apcOnTime[20:0] apcOffTime[20:0]
Pmax[9:0]
Pmin[9:0]
Ka[14:0]
REF[24:0]
Kp[15:0]
Ki[4:0]
Ky
YMAXH[8:0]
YMAXL[31:0]
YMINH[8:0]
YMINL[31:0]
YINITH[8:0]
YINITL[31:0]
KU[5:0]
U_VALUE[25:0]
SEH[4:0]
SEL[4:0]
L_VAL UE[9:0]
HCLR[20:0]
PI
Control
Bl ock
PD
ADC
THER
THV
CKIN.
ADC_EN
SEL[1:0]
ADO_2[9:0] ap cOn
ADC
Cont roller
Service Manual
11-5
Samsung Electronics
Circuit Description
The main signals used in LSU Controller are shown in the table.
Name
PVC-VDO nLREADY nHSYNC nPSync
LSU_VDO
Direction
I
I
I
0
0
Description
The video data output from PVC.
Its activity becomes low as the polygon motor of LSU gets the regular speed.
It informs the beginning of one line. It is the same as nLSYNC of PVC.
It is inputted to nFSync of PVC.
The completed video data output by masking video window on PVC_VOD.
Laser Diode & Window On/Off Time first field second field nHSYNC windowOn ldOn windowOnTime windowOffTime ldOnTime ldOffTime testPattern pattern start counter start
11.1.5 ADC Controller
ChoursM ADC Controller has 8 analog input channels.
It automatically converts the 8 channels in turns with 10 bit 500KSPS adc1341x_pc, and also it makes the conversion on the desired time by manually controlling STC of the register. After finishing the conversion, it makes the interruption to be pending. When AD conversion of 3 rd channel ends for the PI Control of LSU, it sends the 10bit digital data converted with the latch short pulse signal to LSUC.
11-6
Service Manual
Samsung Electronics
Circuit Description
11.2 System Overview
SCX-4725FN is made Main Control part, Operation Panel part, PC Interface part, Scan part, Line Interface part,
Power part.
Each part is independent with each other and the design concept is common use/standard design rule.
Chorus-M ASIC which is made for only printer is used in the Main Control part, and another Micom which can communicate with Chorus-M through UART for Key-Scan, LCD display, LED control, etc.. is used for OPE Panel part.
PC interface control part USB 2.0 Chorus-M Controller ASIC and Image processor is comprised in the Chorus-M
Modem chip, SFX336 which make a function of FACSIMLE can the machine communicate with the other FAX machine on the speed of 33.6Kbps and the LIU(Line Interface Unit) supports the line connection with PABX or
PSTN line.
Power part which made of two part-SMPS and HVPS-supplies Voltage source to the controller part and high voltage to the printing image developting process.
11.2.1 Engine H/W Specification
1) Recording Method : LSU(Laser Scanning Unit)
2) Printing Speed : 24ppm
(In continuing printing base Letter, printing pages from 2nd to last during 1min)
3) Recording Density : 1200 dpi
4) Cassette Capa. : Cassette ; 250sheets(75g/ Base),
1-sheet Feeding : N/A((DRIVE Selection : Paper, OHP, Envelop - 1 sheet)
5) Manual Tray : All paper 1 sheet
6) Paper Size : Cassette, Manual ; Width = 76 ~ 216mm, Length = 125mm ~ 356mm
7) Effective recording size
- A4 :202 x 291 mm
- Letter : 208 x273mm
- Legal : 208 x 350 mm
- Folio : 208 x 325 mm
- TopMargin: 2 2 mm
- Left, Right Margin : 2 2 mm
8) CRU(Toner Cartridge)Life : 3,000pages Printing(A4, ISO 5% Pattern Printing)
9) First Print Out Time : within 11sec ( Standby )
10) Warming up time : within 35sec (Ambient : 25 °C)
Service Manual
11-7
Samsung Electronics
Circuit Description
11.2.2 Main Board Control Part
Main control part of SCX-4725FN is made of ASIC(CPU, Image processor, PC I/F part include, Scan interface part, FAX Modem part and Printing process I/F part. CPU handles the BUS control, I/O interface, scan interface,
PC interface and other miscellaneous driver circuit.
1) Main Board
- Main Board has a function of sending Current Image Video Data to LSU of the machine, controlling motor Driving Circuit and monitoring Paper Exit Sensor, Cover Open switch, OPE Panel Inputs.
2) Main Controller
- CPU : ARM 920T which is exclusive controller to execute Printer & FAX Function and to executs operation block by flash memory sithin system program, and ot control whale system.
Main function block
Completely integrated System for Embedded Applications
PVC
- Dual/Single Beam, - LVDS Pad(VDO, HSYNC), - Support A3 1200dpi, multi-pass color.
HPVC
- Dual/Single Beam, - LVDS Pad(VDO, HSYNC), - Support A4 600dpi, multi-pass color.
DMA
- 6 Channels (if not use CIP4e, 4ch is available for exfernal DMA.
if CIP4E used (a 4 DMA channel use), 2ch available for external DMA.
Operation Frequency : CPU Core -> over 300MHz, System Bus -> 100MHz
Operation Voltage : CPU Voltage -> 1.2V, I/O Pad Voltage -> 3.3V, RTC Voltage -> 3V
- Flash Memory : Stores system program and can be updated to the newer system program code through the PC interface. It stores the FAX Journal List, One Touch dial number, speed dial number, and machine configuration setup data.
Capcity : 16 Mbyte (NOR Type)
Access Time : 70 nsec
- SDRAM : SDRAM is used for Print Buffer, Scan buffer when scanning, ECM Buffer when FAX
Receiving, and system working memory.
Capacity : 32 Mbyte
Access Time : 166MHz(Max)
Data Backup : 48 Hours
Backup Battery Charging Time : 100hours when completely discharged.
11-8
Service Manual
Samsung Electronics
Circuit Description
11.2.3 Scan Part
1) Image Signal Input Part
- Image Signal from CIS has a level of about 1.2V and is goes to ADC of Chorus2.
After ADC, CIS analog signal will be converted to 8-bit Digital signal.
2) Image Processing
- On the surface of the original paper, the light from the CIS LED reflected and goes to the CIS Sensor.
Then the light is converted to the appropriate voltage suitable for ADC input. Analog signal from CIS sensor is used for ADC input then is converted to 8-bit digital data. Image processor of the Chorus2 will do the Shading correction function at first, then Gamma correction function next. After then, the data goes to different module according to the copy or FAX resolution mode. When Text mode, the image data goes to LAT module, when Photo mode, the image data goes to Error Diffusion module, when PC-Scan mode, the image data goes directly to the PC through DMA access.
Summary of the Image sensor interface is as below;
- Minimum Scan Line Time :1.5ms
- Scan Resolution : 600*600 dpi
- Scan Width : 208mm
- Function
White Shading Correction
Gamma Correction
CIS Interface
256 Gray Scale
3) CIS Driving Part
- CIS Supply Voltage : +3.3V
- CIS Max frequency : 5MHz
- CISLinetime
Fax/Copy - 1.5ms
PC-Scan - 4.5ms
- White output volt. : Max 0.8V
4) ADF Driving Part : Driving ADF Stepper motor, and the maximum motor speed is 2000PPS.
- MOTOR DRIVER : A3978(Allegro)
- Driving Voltage : 24V DC
- Phase : 2-2 Phase 2000PPS at Quick Scan,
2-2 Phase 1000PPS AT Fine Scan,
2-2 Phase 667PPS AT Super Fine Scan
Service Manual
11-9
Samsung Electronics
Circuit Description
11.2.4 FAX Modem Part
1) Modem Part
- The modem part is consist SFX336(FAX Modem chip), LIU(Line Interface Unit) and Data Access
Ayyangement (DAA)
Modem (SFX336) specification.
2-wire half-duplex fax modem modes with send and receive data rates up to 33,600 bps
V.17, V.34, V.29, V.27 ter, and V.21 Channel 2
Short train option in V.17 and V.27 ter
PSTN session starting
V.8 and V.8bis signaling
HDLC support at all speeds
Flag generation, 0-bit stuffing, ITU CRC-16 or CRC-32 calculation and generation
Flag detection, 0-bit deletion, ITU CRC-16 or CRC-32 check sum error detection
FSK flag pattern detection during high-speed receiving
Tone modes and features
Programmable single or dual tone generation
DTMF receiver
Tone detection with three programmable tone detectors
Receive dynamic range:
0 dBm to -43 dBm for V.17, V.29, V.27 ter and V.21 Channel 2
9dBm to -43 dBm for V.34 half-duplex
Digital speaker output to monitor received signal
Two16-byte FIFO data buffers for burst data transfer with extension up to 255 bytes
V.21 Channel 1Flag detect
V.21 Channel 1Flag detect
+3.3V only operation
Typical power consumption
Normal mode: 264 mW
11-10
Service Manual
Samsung Electronics
Circuit Description
11.2.5 Printing Process Part
Printing Process part is made of PC-Interface part, PVC(Priter Video Controller), LSU control part, High Voltage control part and Fuser Unit control part. PC-interface core is included in the Chorus2 ASIC and controls the PCinterface. LSU control part controls the LSU polygon motor, Laser diode, video data output so thatthe printing image can be made up on the OPC Drum.
11.2.6 Line Interface Part
Line interface part helps the machine connect to the PSTN or PABX Line.
Its main function is Line connection, Line state monitoring and TAD interface that enables a extension telephone or TAD machine to the SCX-4725FN machine.
11.2.7 Engine Paper Feeding
1) Feeding Type : MP Cassette Type
2) Feeding Standard : Center Loading
3) Feeding Qty : Cassette 150 sheets (75g/ , 20lb paper standard)
4) 1 sheet (Paper, OHP, Envelope etc.)
5) Separating Type: Cassette - Friction Pad Type
6) Manual Tray : 1 sheet
7) Driver Type : Driving by Gearing from Main Motor
8) Pick_up Roller Driver : Solenoid
9) Pick up Roller Rubber Material : EPDM+IR =1.3 or more
10) Pick up Velocity : 94.8731mm/Sec (Process : 93.0667mm/sec)
11) Paper detecting Sensor : Photo Sensor
12) Paper Size Sensor : None
13) Paper Separating Pad Material : NBB 52 °, =0.8~1.2
14) Separating Pad Pressure : TBD 150 gf
15) Pick_up Roller RPM : 47.683 RPM
16) Feeding Pressure (Same as Transfer Roller)
: TBD 150~200gf (SPRING H mm, based on 1sheet)
TBD 150~200gf (SPRING H mm, based on 150sheets)
17) Paper Exit Type : Face Down
18) Feed Roller Force : TBD Kg.f or more.
19) Spring Feed Tensile Force : TBD gf
20) Feed roller Velocity : mm/sec
21) Feed Roller Material : -
22) Exit Sensor : Photo Sensor
Service Manual
11-11
Samsung Electronics
Circuit Description
11.2.8 Deverope Process
- Developing Method : Non magnetic 1 element contacting method
- Toner : Non magnetic 1 element shatter type toner
- Toner Qty : 35gf /60gf (1k/3k)
- The life span of toner 1k/3k sheets (ISO Std. Coverage )
- Toner Residual Sensor : None
- OPC Cleaning : Use the conventional cleaning blade
- Handling of wasted toner : Discard by collecting waste-toner at waste-toner bin.
- OPC Drum Protecting Shutter : None
- Classifying device for toner cartridge: ID is classified by interruption of the frame channel.
- Development Roller type : conductive elastic roller
- Doctor BLADE Type : Regulating toner layer by pressure
- Charge Roller Type : Conductive Roller Contact-Charge
11.2.9 Sanner Part
600dpi Color CIS Module for Flat bed, SCX-4725FN uses the CIS scanning method
1) CIS SPEC
- Scanning size : 216 mm ( width for letter-size)
- Light source : LED
- Scanning sensor: CIS 600/300 dpi
- Scanning mode : Color SCAN / Mono SCAN
- MTF : 30% (300 dpi Chart)
- CIS interface : Analog output
- Power supply : 3.3V
- Clock Frequency: 5.5MHz max.
- Number of output : 1
- LED Current : Green/Blue : 50mA, Red : 60mA
- Clamp Level : 1.4V
- Connection : 12 pin FFC connector (pitch 1.0mm)
2) Scan Resolution
(a) Transmission
- Normal : Vertial: 3.85 Line/mm, Horizontal: 8 Pels/mm : 203 x 98dpi
- Fine : Vertial: 7.7 Line/mm, Horizontal: 8 Pels/mm : 203 x 196dpi
- Super Fine : Vertial: 11.8 Line/mm, Horizontal: 11.8 Pels/mm ; 300 x 300dpi
(b) When Copy : Vertial: 11.8 Line/mm, Horizontal: 23.6 Pels/mm : 600x300dpi(ADF)
Vertial: 23.6 Line/mm, Horizontal: 23.6 Pels/mm : 600x600dpi(Platen)
3) Half Tone (Gray Scale) : 256 Levels
11-12
Service Manual
Samsung Electronics
Circuit Description
4) Scan Line Time
(a) Tx
- Normal : 1.5 ms/Line
- Fine : 1.5 ms/Line
- Super Fine : 1.5 ms/Line
(b) Copy : 1.5 ms/Line
(c) Scan
- Color : 4.5msec/line
- Gray : 4.5msec/line
- Mono : 4.5msec/line
5) Scanning Width
- MAX SCAN WIDTH : 216 mm (8.5 inches)
- Effective Scan Width: 208mm
6) ADF Motor
(a) Motor Spec
-
-
: 24VDC
: 0.6A(Peak)
7) Motor Driver speed & method
(a) FAX Transmission
- Normal Mode : 2000 pps, 2-2
- Fine Mode : 1000 pps, 2-2
- Super Fine Mode : 667 pps, 2-2
(b) Copy Job : 667 pps, 2-2
- max(30sheets) : 50gf
- min(1sheets) : 20gf
8) Document Detect sensor
(a) Type : Photo interrupt
(b) Position : ADF PBA
(c) LED - max current : 30mA
- max voltage : 3.3V
(d) Output - Logic "H" : No Paper
- Logic "L" : Paper
(e) Lever-Sensor DOC : ADF Lower Torsion Spring
9) Regi Detect sensor
(a) Type : Photo interrupt
(b) Position : ADF PBA
(c) LED - max current : 50mA
- max voltage : 3.3V
(d) Output - Logic "H" : No Paper
- Logic "L" : Paper
(e) Lever-Sensor DOC : ADF Lower Torsion Spring
Samsung Electronics
Service Manual
11-13
Circuit Description
10) Document Scan sensor
(a) Type : Photo interrupt
(b) Position : ADF PBA
(c) LED : - Max current : 50mA
- Max Voltage : 3.3V
(d) Output - Logic "H" : Off(No Position), No Paper
- Logic "L" : On (Doc Position), Paper
(e) LEVER - SENSOR SCAN : Scan Lower Torsion Spring
11.2.10 OPE(Operational Panel Equipment)
1) Ope Panel
OPE Panel has a MICOM Chip on it and communicates with Main CPU using Serial communication
Line(SIO). OPE Panel consists of Micom, Key Matrix Part, LED Driving Part and LCD Part.
2) Key Description
No Part
1 Common
2 Save
3 Copy
4 Fax
5 Scan
Feature
3*4Key
Start
Stop/Clear
Menu
Upper Level
Enter
Toner Save
Reduce/Enlarge
No.of Copies
Original Type
Darkness
Favorite Copy
Resolution
Phone Book
Broadcasting
On Hook Dial
Redial / Pause
Scan to
Function
Dialing and Option Input
Starting Fax/Copy Job
Cancel Current Job/Return to default
Option select
Return to upper level menu
Option select/Execute
Next menu or Next option item
Previous menu or Previous option item
TONER SAVE MODE select
Select ZOOM ratio when copy
Select the number of copies
Change Copy Modes(Text,Text/Photo,Photo)
Change the Darkness of the Copied image (Light/Normal/Dark)
Select one of the predefined Copy templates.
STANDARD>FINE>SUPER
FINE>PHOTO>COLOR
Search the user defined Phone number.
When sending FAX data to many place in the same time.
On Hook Dial
Last number Redial / Pause select [scan to PC], [scan to FAX], [scan to E-mail] function.
3) LCD Part
- Number of Characters : 16 Characters x 2 line
Clock, Date display
System Status display
Alarm, Error Message display
Function Dialog Message display
11-14
Service Manual
Samsung Electronics
ELECTRONICS
* This service manual is a property of Samsung Electronics Co., Ltd.
Any unauthorized use of Manual can be punished under applicable international and/or domestic law.
* This service manual is also provided on the web, the ITSELF system Samsung Electronics Co., Ltd.
“http://itself.sec.samsung.co.kr”
Samsung Electronics Co.,Ltd. August. 2006
Printed in Korea.
VERSION NO. : 1.00 CODE : JC-0179 I
advertisement
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
advertisement
Table of contents
- 1 Cover
- 6 Precaution
- 6 1. Precautions
- 6 1.1 Safety Warning
- 7 1.2 Caution for safety
- 10 1.3 ESD Precautions
- 10 1.4 Super Capacitor or Lithium Battery Precautions
- 11 Product Specification
- 11 2. Product Specifications
- 11 2.1 Product Overview
- 12 2.2 Specifications
- 12 2.2.1 General Specifications
- 13 2.2.2 Print Specifications
- 13 2.2.3 Scan Specifications
- 14 2.2.4 Copy Specifications
- 15 2.2.5 Telephone Specificationc
- 16 2.2.6 Fax Specifications
- 17 2.2.7 Paper Handling Specifications
- 17 2.2.8 Software
- 18 2.2.9 Accessory
- 18 2.2.10 Consumables
- 19 2.3 Model Comparison Table
- 20 Operation Instruction & Installation
- 20 3. System Overview
- 20 3.1 System Layout
- 24 3.2 Engine H/W Specificaion
- 31 3.3 Deverope Porcess
- 32 3.4 Sanner part
- 34 3.5 OPE(Operational Panel Equipment)
- 35 3.6 SMPS & HVPS
- 37 3.7 FUSER AC POWER CONTROL
- 38 Alignment & Adjustment
- 38 4. Alignment and Adjustments
- 38 4.1 User Mode
- 41 4.2 Tech Mode and Setting
- 50 4.3 Control Panel
- 52 4.4 LCD Status Error Message
- 54 4.5 Engine Test Mode
- 56 4.6 Paper Path and Clearing paper Jams
- 62 Disassembly & Reassembly
- 62 5. Disassembly and Reassembly
- 62 5.1 General Precautions on Disassembly
- 63 5.2 MPTray
- 64 5.3 Pick Up Roller
- 64 5.4 Front Cover
- 65 5.5 Cassette Tray
- 66 5.6 Rear Cover
- 67 5.7 Right Cover
- 68 5.8 Left Cover
- 69 5.9 Scan Ass'y
- 70 5.10 ADF Housing
- 72 5.11 OPE Unit
- 73 5.12 Platen Housing
- 75 5.13 Middle Cover
- 76 5.14 HVPS
- 77 5.15 Main PBA
- 78 5.16 RX Drive
- 79 5.17 Fuser Unit
- 82 5.18 Engine Shield (With LIU PBA, SMPS)
- 83 5.19 LSU
- 84 5.20 Paper Path Frame
- 86 5.21 CRUM Harness
- 87 Troubleshooting
- 124 Exploded View & Part List
- 145 Block Diagram
- 145 8. Block Diagram
- 145 8.1 System Block Diagram
- 146 Wiring Diagram
- 146 9. Connection Diagram
- 147 Reference Information
- 147 10. Reference Information
- 147 10.1 Troubleshooting Tool
- 148 10.2 Acronyms and Abbreviations
- 150 10.3 Selecting printer locations
- 151 10.4 Sample Tests Patterns
- 152 Circuit Description
- 152 11. Circuit Description
- 152 11.1 Engine Controller
- 152 11.1.1 Heater Control
- 154 11.1.2 PWM Controller
- 154 11.1.3 Motor Driver
- 155 11.1.4 LSU Controller
- 157 11.1.5 ADC Controller
- 158 11.2 System Overview
- 158 11.2.1 Engine H/W Specification
- 159 11.2.2 Main Board Control Part
- 160 11.2.3 Scan Part
- 161 11.2.4 FAX Modem Part
- 162 11.2.5 Printing Process Part
- 162 11.2.6 Line Interface Part
- 162 11.2.7 Engine Paper Feeding
- 163 11.2.8 Deverope Process
- 163 11.2.9 Sanner Part
- 165 11.2.10 OPE(Operational Panel Equipment)