Samsung CLP-775ND Series Service Manual
  1. Manuals
  2. Brands
  3. Samsung Manuals
  4. Printer
  5. CLP-775ND
  6. Service manual

Samsung CLP-775ND Series Service Manual

Color laser printer
Hide thumbs Also See for CLP-775ND Series:
Table of Contents

Advertisement

Quick Links

SERVICE
Color Laser Printer
Refer to the service manual in the GSPN (see the rear cover) for more information.
Color Laser Printer
CLP-775ND series
MANUAL
1. Precautions
2. Product spec and feature
3. Disassembly and Reassembly
4. Alignment and Troubleshooting
5. System Diagram
6. Reference Information
Contents

Advertisement

Table of Contents
loading

Related Manuals for Samsung CLP-775ND Series

Summary of Contents for Samsung CLP-775ND Series

  • Page 1 Color Laser Printer CLP-775ND series SERVICE MANUAL Color Laser Printer Contents 1. Precautions 2. Product spec and feature 3. Disassembly and Reassembly 4. Alignment and Troubleshooting 5. System Diagram 6. Reference Information Refer to the service manual in the GSPN (see the rear cover) for more information.

  • Page 2: Table Of Contents

    PTB (Paper Transfer Belt) Unit ................ 2 − 16 2.2.4.6. Toner Cartridge..................... 2 − 17 2.2.5. Hardware Configuration....................2 − 18 2.2.5.1. Main PBA ....................2 − 19 2.2.5.2. SMPS board ....................2 − 21 2.2.5.3. HVPS Board ....................2 − 23 Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 3 Useful menu item for service ..................4 − 7 4.1.5. Periodic Defective Image ....................4 − 8 4.1.6. Useful management tools ....................4 − 9 4.1.6.1. Using Samsung Easy Printer Manager (Windows only) ........4 − 9 Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 4 Contents 4.1.6.2. Using Samsung Printer Status (Windows only) ........... 4 − 10 4.1.6.3. Using Smart Panel (Macintosh and Linux only) ..........4 − 12 4.1.7. Updating Firmware ...................... 4 − 14 4.1.7.1. Update the firmware by using the USB port............4 − 14 4.1.7.2.

  • Page 5: Precautions

    High voltages and lasers inside this product are dangerous. This product should only be serviced by a factory trained service technician. 2) Use only Samsung replacement parts. There are no user serviceable parts inside the product. Do not make any unauthorized changes or additions to the product as these could cause the product to malfunctions and create an electric shocks or fire hazards.

  • Page 6: Caution For Safety

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

  • Page 7: Handling Precautions

    1.2.4. Assembly and Disassembly precautions Replace parts carefully and 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 product or replacing any parts.

  • Page 8: Disregarding This Warning May Cause Bodily Injury

    5) Do not install the printer on a sloping or unstable surface. After installation, double check that the printer is stable. Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 9: Esd Precautions

    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. Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 10: Product Spec And Feature

    6) Toner cartridge • Initial : 3.5K (K)/ 3.5K (CMY) • Sales: 7K (K)/ 7K (CMY) 7) Paper Handling • Maximum 1,600 Sheets Paper Capacity (500sh cassette, 500sh SCF x 2 EA, 100 MP) Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 11: Specifications

    • Draft : 600x600 dpi • 2.1.2.2. Controller and Software Items Specification Processor 600 MHz Std. 384 MB Memory 896 MB Printer Languages PS3, PCL5 ,PLC6 Fonts 93 scalable ,1 bitmap PCL ,136 PS Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 12: Paper Handling

    A4 148.5 x 210 ~ Legal 216 x 356 (8.5”x14”) Printer Default, Plain Paper, Thick, Thin, Cotton, Archive Paper, Bond, Card Media types MP Tray Stock, Labels, Preprinted, Color Paper, Envelope, Recycled Media weight 16~58lb (60 to 220g/m²) Sensing Paper Empty Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 13: Reliability & Service

    Media types Plain paper Tray Media weight 16~43lb (60 ~ 163 g/m²) Sensing Paper Empty 250 sheets @ 80g/m² (Base Line Paper : Samsung Premium/ Xerox4200) NN Output Stacking Face-Down Condition Supporting Standard Media sizes A4, Letter, Legal, Oficio, Folio...

  • Page 14: Maintenance Part

    A: Replace with new Tray2 Retard roller Pickup-Roller (Tray3) JC97-02259A 200K (MEA UNIT-ROLLER Pages Forward Roller (Tray3) SCF2 JC97-02259A 100K F: Replace Retard roller Retard Roller (Tray3) (MEA UNIT-ROLLER Pages A: Replace with new Tray3 Retard roller Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 15: Environment

    User’s Manual (HTML) Initial Toner Cartridge (CMYK) 2.1.2.9. Options Items Model Name Remark Memory ML-MEM170 512MB Second Cassette Feeder CLP-S775 500–sheet Cassette Wireless Network ML-NWA65L Hard Disk ML-HDK 425 250 GB IEEE 1284B Parallel ML-PAR100 Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 16: Model Comparison Table

    USB Host Size (mm) 446 x 481 x 464 mm 446 x 481 x 464 mm 513 x 490 x 358 mm Toner Cartridge 7K / 7K 7K / 7K 10.5K / 7K (Mono/Color) Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 17: System Overview

    Front Cover Paper Level Indicator Control Panel Optional Tray * Multi-Purpose Tray Paper Width Guide Tray 1 Toner Cartridge Multi-Purpose Tray Paper Transfer Belt (PTB) Multi-Purpose Tray Handle * : This is an option feature. Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 18: Rear View

    USB Port Power-Switch External device interface (EDI)* Handle IEEE 802.11 b/g/n Wireless LAN** IEEE1284 Parallel Connector * : External device interface for Samsung and third party solutions. ** : This is an optional feature. Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 19: Paper Path

    Cassette Feed Cassette Feed Cassette Feed MP Feed MP Feed MP Feed MP Feed MP Feed MP Feed SCF1 Feed SCF1 Feed SCF1 Feed SCF1 Feed SCF2 Feed SCF2 Feed SCF2 Feed SCF2 Feed Copyright© 1995-2016 SAMSUNG. All rights reserved. 2-10...

  • Page 20: System Layout

    Toner Cartridge (M) Main board / SMPS board / Fuser Drive Board (FDB) Toner Cartridge (Y) Pick-Up Roller Tray1 (Basic Tray) Retard Roller SCF Unit (Optional) Retard Roller Pick-Up Roller Pick-Up Roller Exit Roller 2-11 Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 21: Feeding Section

    SCF is the option unit of CLP-775ND. This additionally stores and automatically feeds printing paper. Its function is the same as the Cassette (1st tray). This SCF can be installed until Max. 2 ea. Copyright© 1995-2016 SAMSUNG. All rights reserved. 2-12...

  • Page 22: Fuser Unit

    A pressure roller mounted under a heat roller is made of a silicon resin, and the surface also is coated with Teflon. When a paper passes between a heat roller and a pressure roller, toner adheres to the surface of a paper and is permanently fused. 2-13 Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 23: Drive Unit

    This product have many motors. These motors drive the PTB unit, fuser unit, feeder unit, exit unit, etc. Motor Function BLDC Motor For Fuser Unit BLDC Motor For OPC Drive Unit BLDC Motor For DEVE Drive Unit Step Motor For Feed Drive Unit Copyright© 1995-2016 SAMSUNG. All rights reserved. 2-14...

  • Page 24: Lsu (Laser Scanner Unit)

    Protector panel Trouble Failure Analysis Polygon Motor Error The Rotation of Polygon Motor can not reach stable. Hsync Error Though the rotation of Polygon Motor reach stable, the signal of Hsync is not occurred. 2-15 Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 25: Ptb (Paper Transfer Belt) Unit

    Management of wasted toner : The Waste Toner Tank is equipped. • Life Span : 50,000 images (Declared yield value in accordance with ISO/IEC 24712) • Transfer Voltage Control : ADC Control on Conductive Sponge Roller Copyright© 1995-2016 SAMSUNG. All rights reserved. 2-16...

  • Page 26: Toner Cartridge

    The expected life of toner cartridge : 7,000(YMCK) pages (N/N, Simplex, ISO/IEC 24712 standard pages) • OPC Cleaning: Collect the toner by using Cleaning Blade • Method of Toner supply : Toner is carried to the developing roller by supply belt. 2-17 Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 27: Hardware Configuration

    S LEEP _24V_OF F S DA_DEV DEVE Y CRUM F US ER C ONTR OL DEVE M CRUM POWER FUSER La m p Co n tro l CORD DEVE C CRUM DEVE K CRUM Copyright© 1995-2016 SAMSUNG. All rights reserved. 2-18...

  • Page 28: Main Pba

    32MB Flash memory HDD PWR 2pin HVPS Interface 23pin WLAN LSU Temp 2pin HVPS Interface 30pin LPEC3 ASIC LSU 32pin/34pin Cover open 2pin HOST JACK LSU PWR 10pin OUTBIN Sensor 3pin USB JACK SMPS 28pin 2-19 Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 29 Chorus4 With MII Interface • Active LED(Yellow) / Link LED(Green) 3) PWM • High Voltage Control With Duty • Main Motor Clock 4) I2C Interface • NVRAM (system information + network information) • CRUM Copyright© 1995-2016 SAMSUNG. All rights reserved. 2-20...

  • Page 30: Smps Board

    DC 5V: 24W ~ 30W / DC 24V: 168W ~ 240W Var i st or 24V Fuse 5V Fuse ■ Connection INPUT_AC (Fuser Drive Board ) OUTPUT_5V , 24V (Main PBA ) INPUT_24V_Control (Main PBA ) 2-21 Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 31 24V Ground Power +24V3 24V Ground Power +24V3 24V Ground 5V Ground 5V Ground Power +5V1 5V Ground Power +5V1 +5V1 Power 5V Ground 5V Ground Power +5V2 +5V2 Power Signal Standby reserved Signal(reserved) Copyright© 1995-2016 SAMSUNG. All rights reserved. 2-22...

  • Page 32: Hvps Board

    MP empty sensor, MP clutch) and Erase Lamp 4EA. Connection PANEL Feed, CST empty sensor EXIT SENSOR MP solenoid, MP empty, CST detect 24V SWITCH Fuser bias HVPS1(from mainboard) Paper size HVPS2(from mainboard) Regi sensor 2-23 Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 33 Individual T1 channels for each color. • AC + DC deve high voltage. • 1 Chanel charger output to each 4 color’s port. • All output channels can be adjusted by using volume control components. Copyright© 1995-2016 SAMSUNG. All rights reserved. 2-24...

  • Page 34: Hvps Sub Board

    Item Specification Condition Rated output voltage -1300V±3% Rated input , 30 Input Output RIPPLE & Noise Less than 50Vp-p Rated input , 30 Input Output voltage SETTING -1300V Rated input , 30 Input 2-25 Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 35: Fuser Drive Board

    SMPS AC ( to SMPS) ■ Specification Input Voltage(Range) AC 110V (90 ~ 135V) AC 220V (180 ~ 270V) Input Current Output Power Max. 1500W Max. 1500W Phase Detect Not support Protection Relay Control Signal Copyright© 1995-2016 SAMSUNG. All rights reserved. 2-26...

  • Page 36: Ope Board

    The OP PBA includes an 8-Bit CMOS Micom(S3F828B) and a Power Key. With the OPE Power Key, user can turn on & off the set(CLP-775ND). ■ Connection Main IF LCD Back Light IF LCD IF For Download For Download For Debug 2-27 Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 37: Sensor

    Check paper position on Fuser Paper Empty Sensor Check Paper empty on a cassette Cassette Detect Check cassette insertion Paper Feed Sensor Check paper position MPF Empty Sensor Check paper empty on MPF Copyright© 1995-2016 SAMSUNG. All rights reserved. 2-28...
  • Page 38 2. Product spec and feature Sensor (Expansion) CASSETTE_DETECT SENS_ACR PAPER_EMPTY THERMOSTAT SENS_FEED CRUM_DEVE_Y(M/C/K) SENS_REGI CRUM_PTB SENS_PAPER_EXIT PAPER_SIZE1(2/3) OUTBIN_FULL INNER_TEMP MP_EMPTY SENS_HUMIDITY OUT_TEMP CLUTCH_FEED SENS_CTD CLUTCH_PICKUP 2-29 Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 39: Software Descriptions

    Host. 2) Kernel that control and management the whole procedure include of Control flow and Printing Job before transfer to Engine system. Copyright© 1995-2016 SAMSUNG. All rights reserved. 2-30...

  • Page 40: Data And Control Flow

    4) Engine prints rendered bit-map data to paper with required size and type by Kernel. And then, for Job Spooling function for Multi-User, Multi-Printing that is occurred in Network printing and various additional printing functions, this Kernel uses max. 10 Queuing systems in memory. 2-31 Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 41: Disassembly And Reassembly

    3.1.1. Precautions when assembling and disassembling • Use only approved Samsung spare parts. Ensure that part number, product name, any voltage, current or temperature rating are correct. Failure to do so could result in damage to the machine, circuit overload, fire or electric shock.

  • Page 42: 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. Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 43: Screws Used In The Printer

    ELA UNIT-CST SENSOR SCREW-TAPTYPE;PWH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,- 6003-000196 SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A UNIT-PTB_TERMINAL 6003-000196 FRAME -RIGHT SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A 6003-000196 STOPPER-FAN SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A 6003-000269 BRACKET-DEVE_DR SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,- 6003-000269 DUCT-FAN SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,- 6003-000269 FRAME-RIGHT SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,- 6003-000301 FRAME MAIN-RIGHT SCREW-TAPTYPE;BH,+,S,M4,L6,ZPC(WHT),SWRCH18A 6006-001193 FRAME MAIN-RIGHT SCREW-MACHINE;PH,+,WSP,M3,L10,ZPC(WHT),SWRCH18A Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 44 CARTRIDGE-TRANSFER SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A 6003-000282 CARTRIDGE-TRANSFER SCREW-TAPTYPE;BH,+,-,B,M3,L8,ZPC(BLK),SWRCH18A,- 6003-000196 BRKT-HINGE L SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A 6003-000196 BRKT-HINGE R SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A 6003-000196 COVER-L/R SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A 6003-000196 COVER-TOP,L/R SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A 6003-000196 FRAME-DAMPER L SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A 6003-000196 FRAME-DAMPER R SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 45 SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,- 6003-000269 BRKT-MAIN SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,- 6003-000269 BRKT-REAR SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,- 6003-000269 COVER-TOP SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,- 6003-000269 COVER-TOP,BRKT-REAR SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,- 6003-000269 SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,- 6003-000269 SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,- 6003-000269 MAIN PBA SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,- 6003-000269 SMPS SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,- 6003-000269 BRKT-DUMMY POWER SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,- 6003-000269 GUIDE-HARNESS SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,- 6003-000301 SCREW-TAPTYPE;BH,+,S,M4,L6,ZPC(WHT),SWRCH18A UNIT-BRACKET_MAIN Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 46: Replacing A Maintenance Parts

    The fuser unit is very hot. So turn the printer off and wait until the fuser unit to cool before replacing it. 2. Lift up and release the fuser unit while pushing both levers. Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 47: Pick-Up Roller

    3. Disassembly and Reassembly 3.3.2. Pick-Up roller 1. Remove the Cassette Unit. 2. Pull the pick up roller in the direction of the arrow. Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 48: Retard Roller

    4. Remove the Guide-Paper Path after releasing both hooks. 5. Release the Retard roller holder. 2. Remove the Cassette-Paper-Path after removing 2 screws. 6. Release the Retard roller from its holder. 3. Remove the Plate-Path after removing 5 screws. Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 49: Dust Cleaning Kit

    1. Remove the cassette. 3. Pull the toner cartridge unit out of the machine. 4. Separate the guide-pick up. 2. Open the front cover. Remove the PTB (Paper Transfer Belt) unit. 5. Separate the dust cleaning kit. Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 50: Disassembly Procedure

    1. Remove 2 screws and the MEA COVER-NOISE. 2. Open the front cover. And remove 2 screws. 4. Unlatch the 5 hooks from the bottom before remove the side cover. And remove the right/left cover. 3-10 Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 51 5. Release the rear cover after remove 7 screws. 7. Remove 6 screws. 8. Lift the top cover up. Unplug 2 connectors. 6. Remove 4 screws from both side. 9. Remove the left/right link. Copyright© 1995-2016 SAMSUNG. All rights reserved. 3-11...
  • Page 52 3. Disassembly and Reassembly 10. Remove 4 screws from both side. 12. Remove the Damper hinge. (2 EA) And release the front cover. 11. Remove the Bracket hinge with any tool after remove one screw. 3-12 Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 53: Front Cover

    When reassembling, be careful the shaft head direction. 2. For the opposite side, remove 2 screws and the shaft. 4. Release the Front cover unit. NOTE When reassembling, be careful the shaft head direction. Copyright© 1995-2016 SAMSUNG. All rights reserved. 3-13...

  • Page 54: Ope Unit

    Before disassembling the Main PBA, remove the cover unit. 2. Remove 4 screws and release the Main PBA. 1. Unplug all harness from Main PBA. CAUTION Observe precautions For handling Electrostatic Sensitive Devices 3-14 Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 55: Hvps Board

    1. Unplug the harness from the top/bottom of the HVPS Board. 3.4.6. SMPS Board Before disassembling the SMPS board, remove the cover 2. Release the SMPS board after removing 4 screws. unit. 1. Unplug the harness from the SMPS board. Copyright© 1995-2016 SAMSUNG. All rights reserved. 3-15...

  • Page 56: Hvps Sub Board (Ac Board)

    3. Remove the 3 screws. And then remove the SMPS bracket. 1. Remove the 4 screws. 2. Remove the SMPS board after removing 4 screws. 4. Remove 6 screws and release the AC Board and Insulation sheet. 3-16 Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 57: Fuser Control Board

    3.4.8. Fuser Control Board Before disassembling the Fuser control board, remove the 2. Release the Fuser control board after removing 4 cover unit. screws. 1. Unplug the harness from the Fuser control board. Copyright© 1995-2016 SAMSUNG. All rights reserved. 3-17...

  • Page 58: Lsu

    3. Disassembly and Reassembly 3.4.9. LSU Before disassembling the LSU, remove the 2. Remove the rear-fan. Remove 4 screws. And remove BRACKET-REAR. the LSU. 1. Remove the BRACKET-REAR after removing 7 screws. 3-18 Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 59: Clutch Pick-Up And Clutch-Feed

    3. Disassembly and Reassembly 3.4.10. Clutch Pick-Up and Clutch-Feed 1. Remove 2 E-rings. 2. Release the Clutch-Feed and Clutch Pick-Up. Copyright© 1995-2016 SAMSUNG. All rights reserved. 3-19...

  • Page 60: Alignment And Troubleshooting

    Power Sends the machine into power saver mode. You can also turn the power on and off with this button. Status LED Shows the status of your machine. Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 61: Understanding The Status Led

    ISO/IEC 19798. The number of pages may be affected by operating environment, percentage of image area, printing interval, media type, and media size. Some amount of toner may remain in the cartridge even when red LED is on and the printer stops printing. Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 62: Jam Removal

    5) Remove the jammed paper by gently pulling it straight out as shown below. 3) Close the front cover. 6) Insert tray 1 back into the machine until it snaps into place. Printing automatically resumes. Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 63 3. 5) Close the front cover to resume printing. 2) Open and close the front cover to resume printing. 3) Using the handle, completely open the front cover. Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 64 If you do not see the jammed paper or if there is any resistance when you pull, stop and see “In the fuser unit area” section 3) Open and close the front cover to resume printing. Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 65 3) Remove the jammed paper by pulling in the direction shown. To avoid tearing the paper, pull it out gently and slowly. 6) Close the front cover to resume printing. Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 66: Useful Menu Item For Service

    When you have moved the machine or replaced some parts, it is strongly recommended to operate this menu manually. 1) Press “Menu” Button on the control panel. 2) Press up/down arrow to highlight Color and press OK. Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 67: Periodic Defective Image

    Offset, Spot, Line Burst cartridge Paper Transfer Belt Transfer Roller 44 mm Periodic Band (by little difference of density) unit Paper Transfer Belt PTB charge roller 31.4 mm White and Black Spot, Periodic Banding unit Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 68: Useful Management Tools

    To open the program: Select StartPrograms or All ProgramsSamsung PrintersSamsung Easy Printer ManagerSamsung Easy Printer Manager. The Samsung Easy Printer Manager interface is comprised of various basic sections as described in the table that follows: Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 69: Using Samsung Printer Status (Windows Only)

    SyncThru™ or CounThru™ admin software. 4.1.6.2. Using Samsung Printer Status (Windows only) [The Samsung Printer Status is a program that monitors and informs you of the machine status.] Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 70 Check the operating system(s) that are compatible with your machine (see Basic guide). Samsung Printer Status overview If an error occurs while operating, you can check the error from the Samsung Printer Status. Samsung Printer Status is installed automatically when you install the machine software.

  • Page 71: Using Smart Panel (Macintosh And Linux Only)

    Smart Panel is a program that monitors and informs you of the machine’s status, and allows you to customize the machine’s settings. For Macintosh, Smart Panel is installed automatically when you install the machine software. For Linux, you can download Smart Panel from the Samsung website www.samsung.com. NOTE •...
  • Page 72 4. Alignment and Troubleshooting Changing Smart Panel‘s settings Right-click in Linux or in Mac OS X click on the Smart Panel icon and select Options. Select the settings you want from the Options window. 4-13 Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 73: Updating Firmware

    3) Turn the machine on. Check if the printer is the ready status. 4) Drag the firmware file and Drop down on the usblist2.exe. And then firmware update will be started automatically. 5) When upgrading is completed, machine is automatically re-booting. Copyright© 1995-2016 SAMSUNG. All rights reserved. 4-14...

  • Page 74: Update The Firmware By Using The Network

    If the machine supports ‘Direct Print’, you can enable this function using the SWS menu. The default configuration is ‘Disabled’ for your security 3) Select Maintenance menu and click “upgrade wizard” 4) Select firmware file using “browser” button and press next button. 4-15 Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 75 4. Alignment and Troubleshooting 5) SyncThru will check verify firmware file and compare version and press next button. 6) Machine starts upgrading. SyncThru will return home page after upgrading is completed. Copyright© 1995-2016 SAMSUNG. All rights reserved. 4-16...

  • Page 76: Tech Mode

    ‘Tech Mode’, the machine has entered service tech mode. After entering the tech mode, select the item you want by using a button on control panel. Below picture shows to select the motor color opc item in Test Routine. 4-17 Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 77: Tech Mode Menu Map

    X Offset Center M [-5~5] 0* X Offset Center C [-5~5] 0* X Offset Right Y [-5~5] 0* X Offset Right M [-5~5] 0* X Offset Right C [-5~5] 0* Regi Pattern Printing… Copyright© 1995-2016 SAMSUNG. All rights reserved. 4-18...

  • Page 78: Tech Mode Menu Description

    It shows printing usage by print job duty. • ID Control History It shows image density control history. 3) EDC Mode • NVRAM Read/Write This menu can change a configuration value for engine firmware. 4-19 Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 79 Magenta LD Power at Normal Speed 110-LD Power 0060-LD Power C [-10~10] 0* Cyan LD Power at Normal Speed 0070-LD Power K [-10~10] 0* Black LD Power at Normal Speed 111-Toner Not Available Copyright© 1995-2016 SAMSUNG. All rights reserved. 4-20...
  • Page 80 0100-Tray2 Size2 Detects whether auto size2 sensor of tray2 is high or low. 0110-Tray2 Size3 Detects whether auto size3 sensor of tray2 is high or low. 0140-Tray3 Home Pos Detect when tray3 is closed. 4-21 Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 81 0050-Fuser Bias Fuser bias voltage on at normal drive level 0090-Fuser Power On It controls temperature of fuser as 180 degrees. 0110-Fuser Fuse 1 R Detect if the life of fuser1 is exhausted. Copyright© 1995-2016 SAMSUNG. All rights reserved. 4-22...
  • Page 82 LSU LD4 enable On/Off (black) 112-ACR 0010-Manu Regi Clear Clear Manual Offset Value of Color Regi. • Manual Settings This menu can set up the offset manually. • Regi Pattern This menu can print the regi pattern. 4-23 Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 83: Troubleshooting

    Red LED on / See the troubleshooting OPE LED Error message for error code Green OK? is displayed. Print(test pattern) printing Refer to "So lution Quality is of Image Pro ble m" Nomal? Copyright© 1995-2016 SAMSUNG. All rights reserved. 4-24...

  • Page 84: Basic Check List

    Refer to image quality problem section. 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 4-25 Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 85: Error Code And Troubleshooting

    K toner not compatible / Black toner cartridge is not compatible. Check C2-5512 P.4-38 guide. C4-1110 Prepare Transfer belt / Prepare new Transfer belt unit P.4-39 C4-1120 Replace TR. belt / Replace with new Transfer belt unit P.4-39 Copyright© 1995-2016 SAMSUNG. All rights reserved. 4-26...
  • Page 86 Error: #U2-6134 / LSU Unit Failure: #U2-6134. Turn off then on. P.4-58 U2-6142 Error: #U2-6142 / LSU Unit Failure: #U2-6142. Turn off then on. P.4-59 U2-6143 Error: #U2-6143 / LSU Unit Failure: #U2-6143. Turn off then on P.4-59 4-27 Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 87 3) If the toner cartridge is overloaded, replace it. 4) If the Main BLDC motor is defective, replace it. 5) If the problem persists after replacing the Main BLDC motor, replace the main board. Copyright© 1995-2016 SAMSUNG. All rights reserved. 4-28...
  • Page 88 3) If the toner cartridge is overloaded, replace it. 4) If the Fuser BLDC motor is defective, replace it. 5) If the problem persists after replacing the Fuser BLDC motor, replace the main board. 4-29 Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 89 3) If the toner cartridge is overloaded, replace it. 4) If the DEVE BLDC motor is defective, replace it. 5) If the problem persists after replacing the DEVE BLDC motor, replace the main board. Copyright© 1995-2016 SAMSUNG. All rights reserved. 4-30...
  • Page 90 1) Check if the fan connector on Main board is connected properly. 2) If the fan is defective, replace it. 3) If the problem persists after replacing the fan, replace the main board. 4-31 Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 91 (Short) open. Thermistor Normal Case9) Replace the fuser unit and main board. Check the SMPS (Contact) Triac. Abnormal Case10) Replace the fuser unit. Check the SMPS Triac. (Non-Contact) 1) Replace the fuser unit. Copyright© 1995-2016 SAMSUNG. All rights reserved. 4-32...
  • Page 92 Lift the fuser unit up while pushing the lever. c) Check if the thermistor contacts the heat roller surface. 2) Check the SMPS Triac. Measure the resistance value on each checking points with DVM. 4-33 Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 93 4. Alignment and Troubleshooting Checking points Normal value A ↔ B Open A ↔ C More than 10Ω B ↔ C Open Copyright© 1995-2016 SAMSUNG. All rights reserved. 4-34...
  • Page 94 ► Troubleshooting method 1) Print the Supply Information report. Check the toner cartridge life. 2) If its life is at the end, turn the machine off and replace the corresponding toner cartridge with new one. 4-35 Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 95 ► Troubleshooting method 1) Print the Supply Information report. Check the toner cartridge life. 2) If its life is at the end, turn the machine off and replace the corresponding toner cartridge with new one. Copyright© 1995-2016 SAMSUNG. All rights reserved. 4-36...
  • Page 96 1) Open the front cover. Remove the corresponding toner cartridge. And reinstall it. 2) If the problem persists, check the Deve CRUM CN5 connector on main board. 3) Check if the DEVE CRUM I/F Pin and Deve CRUM terminal are contaminated. 4-37 Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 97 ► Symptom The toner cartridge is not installed properly. ► Troubleshooting method 1) Open the front cover. Check if each color cartridge is inserted in proper position. 2) Replace the samsung genuine toner cartridge. Copyright© 1995-2016 SAMSUNG. All rights reserved. 4-38...
  • Page 98 The PTB unit is not installed properly. / The PTB unit is not compatible. ► Troubleshooting method 1) Open the front cover. Remove the PTB unit. 2) Check the model name. If it is not samsung genuine PTB unit, replace it. 4-39 Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 99 ► Symptom The fuser unit is at the end of its life. ► Troubleshooting method 1) Open the top cover. Remove 4 screws. 2) Lift the fuser unit up while pushing the lever. Copyright© 1995-2016 SAMSUNG. All rights reserved. 4-40...
  • Page 100 Tray2,3 retard roller is at the end of its life. ► Troubleshooting method 1) Print the Supply Information report. Check the retard roller life. 2) Remove the corresponding tray. 3) Replace the retard roller with new one. 4-41 Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 101 Dust cleaning kit is at the end of its life. ► Troubleshooting method 1) Open the front cover. 2) Remove the PTB unit. 3) Replace the dust cleaning kit with new one.(Refer to 3.3.4. Dust Cleaning Kit) Copyright© 1995-2016 SAMSUNG. All rights reserved. 4-42...
  • Page 102 3) Check if the forward and pick up rollers are defective or worn out. 4) Check if the Empty/Pickup/Regi-Act sensors are working properly. 5) Check if the SCF main board, motor, clutches connectors are connected properly. 4-43 Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 103 7) Check if the Press D-cut of the Gear-Lifting is broken. 8) If the problem persists after checking No. 1~7, replace the SCF main board. 9) If the problem persists after replace the SCF main board, replace the Draw connector. Copyright© 1995-2016 SAMSUNG. All rights reserved. 4-44...
  • Page 104 ► Troubleshooting method 1) Check if the optional cassette is inserted properly. Remove the cassette then re-install it. 2) Check if the Signal-Switch is deformed or broken. If it is defective, replace it. 4-45 Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 105 1) Check if the paper in optional cassette is loaded. Load the paper. 2) Check if the Empty actuator and Empty sensor work properly. 3) If the Empty actuator is defective, replace it. 4) If the Empty sensor is defective, replace it. Copyright© 1995-2016 SAMSUNG. All rights reserved. 4-46...
  • Page 106 5) If the Pick up roller doesn’t operate, check the gear and clutch from the end of shaft. 6) If the Pick up roller rotates but paper is not fed, check for dirty or worn out roller. 4-47 Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 107 8) Check if the Actuator-Feed works normally. If the actuator is defective, replace it. If the feed sensor is defective, replace it. 9) Check if the Knock up plate in the tray is assembled normally. Copyright© 1995-2016 SAMSUNG. All rights reserved. 4-48...
  • Page 108 2) Check if the MP empty sensor connector is connected properly. Reconnect it. 3) If the pick up roller doesn’t rotate, replace the pick up clutch. 4) Check if the Feed sensor and Feed actuator work normally. If these parts are defective, replace it. 4-49 Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 109 ► Troubleshooting method 1) Take out the tray 1. Then reinstall it. 2) Check if the Feed sensor connector is connected properly. Reconnect it. 3) Check if the Draw connector is connected properly. Reconnect it. Copyright© 1995-2016 SAMSUNG. All rights reserved. 4-50...
  • Page 110 2) Check if the Paper empty sensor connector is connected properly. 3) If the Paper empty sensor is defective, replace it. 4) Check if the Paper empty actuator is assembled correctly and work normally. If it is defective, replace it. 4-51 Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 111 1) Check if the MP paper empty sensor connector is connected properly. 2) If the MP paper empty sensor is defective, replace it. 3) Check if the MP empty actuator is assembled correctly and work normally. If it is defective, replace it. Copyright© 1995-2016 SAMSUNG. All rights reserved. 4-52...
  • Page 112 3) If the connection is OK, check the actuator fuser and exit sensor. If there is a defect, replace the defective part. 4) Check if the OPC motor is working normally. If the OPC motor is defective, replace it. 5) Check if the belt of the PTB is torn. Replace the PTB unit. 4-53 Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 113 3) Check if the Exit actuator work normally. Check if the actuator spring is assembled correctly. 4) Check if the fuser motor rotate in reverse when the paper is entering to the machine for duplex printing. Copyright© 1995-2016 SAMSUNG. All rights reserved. 4-54...
  • Page 114 2) Check if the flat cable and exit sensor connectors are connected correctly. Reconnect it. 3) Check if the fuser actuator and exit sensor work normally. If there are any defective parts, replace it. 4-55 Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 115 2) Check if the CN3 connector on Main board is connected correctly. 3) Check if the Actuator-Stacker, Actuator-OutFull, and Bin-full sensor work normally. Check if the Bin-full sensor connector is connected correctly. If there are any defective parts, replace it. Copyright© 1995-2016 SAMSUNG. All rights reserved. 4-56...
  • Page 116 3) Check the cover switch harness between the main board and HVPS board. 4) Check the 24V enable signal on the main board. If the voltage is high (5V), replace the main board. 5) If the problem persists, replace the SMPS board. 4-57 Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 117 1) Check LSU motor operation sound. 2) If there is no sound, check that LSU connector is connected correctly. 3) If the connection is OK, replace the LSU. 4) If the problem persists, replace the main board. Copyright© 1995-2016 SAMSUNG. All rights reserved. 4-58...
  • Page 118 ※ First, turn the machine off then on. If the error persists, refer to the following. 1) Check if the LSU connector on the main board is connected correctly. 2) If the connection is OK, replace the LSU. 3) If the problem persists, replace the main board. 4-59 Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 119: Image Quality Problems

    Check if there are scratches on the circumference of the Replace the toner cartridge. developing roller. Foreign objects inside the toner cartridge. Replace the toner cartridge. Check if there are vertical scratches on the transfer unit. Replace the PTB unit. Copyright© 1995-2016 SAMSUNG. All rights reserved. 4-60...
  • Page 120 Check the connecting state between the Main PBA and HVPS. Reconnect the harness. Poor contact between toner cartridge and set contacts. Clean the contacts as necessary. Replace any deformed or damaged contacts. HVPS is defective. Replace the HVPS. 4-61 Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 121 Replace the toner cartridge. the damaged blade or low toner level. Poor the pressure spring force of the toner cartridge. Replace the toner cartridge. The life of the Toner Cartridge has expired. Replace the toner cartridge. Copyright© 1995-2016 SAMSUNG. All rights reserved. 4-62...
  • Page 122 Description : Toner is not properly fixed on paper. Cause and Check Point Solution The media doesn’t meet specification Use the proper media in specifications. Fuser is defective Replace the fuser unit. FDB (Fuser drive board) is defective. Replace the FDB. 4-63 Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 123: Other Errors

    Plug the power code. The power input and SMPS output are abnormal. Replace the SMPS. LCD panel is defective. 1) Replace the LCD panel 2) If the problem persists, replace the OPE board. Copyright© 1995-2016 SAMSUNG. All rights reserved. 4-64...

  • Page 124: System Diagram

    S LEEP _24V_OF F S DA_DEV DEVE Y CRUM F US ER C ONTR OL POWER DEVE M CRUM FUSER La m p Co n tro l CORD DEVE C CRUM DEVE K CRUM Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 125: Connection Diagram

    LSU BLDC FUSER Clutch Fus er BLDC motor motor Bias (fro m HVP S ) The rmistor AC IN The rmoSta t FUSER Unit s ens or s ens or 1 s ens or 2 Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 126: Reference Information

    M2 short). Tweezers Spring Hook Standard : For general home use, small type. Standard : For general use Cotton Swab Software (Driver) installation CD ROM Standard : For general home use, for medical service. Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 127: Acronyms And Abbreviations

    Mean Copy Between Failure ESMTP Extended Simple Mail Transfer Protocol MDSP Multiple Document Single Printout Electro Photography Multi-Functional Product Electric Pre-Collation Modified Huffman (a kind of image data coding method) FCOT First Copy Out Time Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 128 Un-Shut Down Rate(=NSDR) Printing Video Controller in the XCMI Samsung’s Management Information Base SPGPm(Graphic Processor for Printer) Quality, Cost, and Delivery Warranty Action Remote Control Panel W x D x H Width x Depth x Height Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 129: Service Parts

    ELA=Electrical Assembly, HOU =Housing MEA UNIT-COVER PA EXIT ASS’Y MEA= Mechanical Assembly, PA=Paper PMO= Processing Mold PMO-TRAY EXTENTION MP NE MP=Multi-Purpose(Bypass) tray NE=for NEC (common as Samsung Halk printer) MEC-CASSETTE ASS’Y(LETTER) MEC = Mechanic Combined unit COVER-M-FRONT M=Mold MPR-NAME/PLATE MPR= Machinery Press,...
  • Page 130 PMO-BUSHING FINGER, F F=Front ICT-SHAFT-EXIT LOWER ID ID=Idler SPRING-EXIT ROLL FD FD=Face Down P/U=Pickup PMO-BUSHING_P/U,MP MP =Multi-Purpose (Bypass) tray PMO-HOLDER CAM MPF MPF=Multi-Purpose Feeder(=MP) PMO-GEAR P/U MPF P/U=Pickup MFP =Multi-Functional Peripheral RPR-RUBBER PICK UP,MP RPR=Rubber Press Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 131 PBA SUB-REGI => Sub Printed circuit Board PBA SUB-REGI Assembly for the Registration GROUND-P_SCAN ROLLER GROUND-P =Ground-Press C/O = Cover Open IPR-GUARD C/O S/W S/W= Switch MEA UNIT-TX STACKER TX =Transmit IPR-WASHER SPRING CU CU=Curve Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 132: The Sample Pattern For The Test

    6. Reference Information 6.3. The Sample Pattern for the Test The life of the toner cartridge and the printing speed are measured using the pattern shown below. 6.3.1. A4 ISO 19798 Standard Pattern Copyright© 1995-2016 SAMSUNG. All rights reserved.

  • Page 133: Selecting A Location

    Front: 326 mm (enough space so that the paper tray can be removed) • Back: 100 mm (enough space for ventilation) • Right: 100 mm (enough space for ventilation) • Left: 100 mm (enough space for ventilation) Copyright© 1995-2016 SAMSUNG. All rights reserved.
  • Page 134 E.Asia, W.Asia, https://gspn2.samsungcsportal.com China, Japan N.America, S.America https://gspn3.samsungcsportal.com This Service Manual is a property of Samsung Electronics Co.,Ltd. © 2016 Samsung Electronics Co.,Ltd. Any unauthorized use of Manual can be punished under All rights reserved. applicable International and/or domestic law.

This manual is also suitable for:

Clp-775ndClp-770nd

Table of Contents