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Samsung SCX-4200 Series Service Manual
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Samsung SCX-4200 Series Service Manual

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SERVICE
DIGITAL LASER MFP
SCX-4200 Series
DIGITAL LASER MFP
SCX-4200 Series
SCX-4200/XAX
Basic Model : SCX-4200
Manual
The keynote of Product
[ Key Features ]
- 18ppm Print/Copy Speed
- 600dpi Print/Copy Resolution
- 600 x 2400dpi Scan Resolution
- Samsung Print Language
- 8MB System Momory
- 250sh Paper Input/50sh Paper Output
- Under 42sec Warm-up Time
- 16 x 2 Line LCD Display
- USB 2.0
- 3K Toner Yield: initial(1K), sales(3K)
- Special Copy: ID Copy, Clone, 2-up, Poster,
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Summary of Contents for Samsung SCX-4200 Series

  • Page 1 DIGITAL LASER MFP SCX-4200 Series SCX-4200/XAX Basic Model : SCX-4200 SERVICE Manual DIGITAL LASER MFP The keynote of Product [ Key Features ] - 18ppm Print/Copy Speed - 600dpi Print/Copy Resolution - 600 x 2400dpi Scan Resolution - Samsung Print Language...
  • Page 2 ELECTRONICS * This service manual is a property of Samsung Electronics Co., Ltd. Any unauthorized use of Manual can be punished under applicable international and/or domestic law. Samsung Electronics Co.,Ltd. November. 2005 * This service manual is also provided on the web, the ITSELF Printed in Korea.

  • Page 3: Table Of Contents

    Contents 1. Precautions 1.1 Safety Warning 1.2 Caution for safety 1.3 ESD Precautions 1.4 Super Capacitor or Lithium Battery Precautions 2. Product Specification 2.1 Product Overview 2.2 Specifications 3. System Overview 3.1 System Outline 3.2 H/W Structure abd Descriptions 3.3 S/W Structure and Descriptions 3-19 4.
  • Page 4 Continued 5. Disassembly and Reassembly 5.1 General Precautions on Disassembly 5.2 Front Cover 5.3 Rear Cover 5.4 DC Fan 5.5 Right Side Cover 5.6 Left Side Cover 5.7 Scanner Unit 5.8 OPE Unit 5-10 5.9 Middle Cover Unit 5-11 5.10 Fuser 5-12 5.11 Exit Roller 5-14...
  • Page 5 Continued 7. Block diagram 7.1 System Block Diagram 8. Exploded Views & Parts List 8.1 Exploded Views and Parts List 9. Connection Diagram 9.1 SCX-4200 Connection Diagram 10. Schematic Diagram 10.1 Main Board 10-1 10.2 OPE Circuit Diagram 10-8 10.3 SMPS-110V 10-9 10.3 SMPS-220V...

  • Page 6: Precautions

    High voltages and lasers inside this product are dangerous. This printer should only be serviced by a suitably trained and qualified service engineer. (2) Use only Samsung replacement parts There are no user serviceable parts inside the printer. Do not make any unauthorized changes or additions to the printer, these could cause the printer to malfunction and create electric shock or fire hazards.

  • Page 7: 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 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.

  • Page 8: Handling Precautions

    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.

  • Page 9: Disregarding This Warning May Cause Bodily Injury

    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. Service Manual Samsung Electronics...

  • Page 10: Esd Precautions

    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 Samsung Electronics...

  • Page 11: Product Specification

    Product Specifications 2. Product Specification 2.1 Product Overview Item Descriptions Remark Basic Model SCX-4200/SEE Series Model SCX-4200 Market of Sailes Persnal user MFP(Low Price for small work Group.) Specification 18ppm(Ltr. 19ppm), Chorus2(CPU : Use 16/32 Bit RISC Processor) 1K(initial), 3K(sailes) USB 2.0...

  • Page 12: Specifications

    Product Specifications 2.2 Specifications Specfications are correct at the time of printing. Product specifications are subject to change without notice. See below for product specifications. 2.2.1 General Specifications Items SCX-4200 Remarks General Major Features Copier,Print,Scan Size (W*D*H) 16.6"x15.8" x9.4" (409x362x232mm) Net Weight(Inc.

  • Page 13: Print Specification

    Product Specifications 2.2.2 Print Specification Items SCX-4200 Remarks PRINT Print Speed 19ppm/Ltr, 18ppm/A4 Print Method Laser Print Language Power Save Yes(5/10/15/30/45min.) Resolution Normal 600 x 600 dpi Toner Save LCD Only (Toner Save On/Off Setting method is in the Menu).

  • Page 14: Copy Specification

    Product Specifications 2.2.4 Copy Specification Items SCX-4200 Remarks COPY Copy Quality Selection or Text 600x300dpi Original Image type Text/Photo 600x300dpi selection Mode Photo 600x600dpi for Platen FCOT Stand by Approx. 11 seconds From Cold Status Less than 41 seconds Copy Speed / Letter SDMC at all mode 19cpm/Ltr.
  • Page 15 Product Specifications 2.2.5 Paper Handiling Specification Items SCX-4200 Remarks Paper Handling Capacity( 20lbs) Main Tray 250sheets Bypass(MP Tray) Single Sheet Optional Cassette Output Capacity Face Down: 50Sheets/20lb Face Up: 1Sheet Output Control Face down/Face up Paper Size Main Tray Legal,A4,Letter, Folio,...
  • Page 16 Product Specifications 2.2.6 Other Specification Items SCX-4200 Remarks Software Win 2.x *Dos(No) Win 95 Win 98&WinME Win NT 4.0 Win 2000 Win XP Print, Scan Linux Print, Scan Driver Printer TWAIN Application Remote Control Panel, Only for upgrade FW PC-FAX...

  • Page 17: System Overview

    System Overview 3. System Overview This chapter describes the functions and operating principles of the main components. 3.1 System Outline 3.1.1 Front View Service Manual Samsung Electronics...
  • Page 18 System Overview 3.1.2 Sensor Service Manual Samsung Electronics...
  • Page 19 System Overview 3.1.3 Control Panel Service Manual Samsung Electronics...

  • Page 20: System Layout

    System Overview 3.1.4 System Layout SCAN PART Service Manual Samsung Electronics...

  • Page 21: Paper Feed Mechanism

    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. Service Manual Samsung Electronics...

  • Page 22: Scanner Unit

    2.Scan Resolution : Color : Max 600DPI 3.Scan Width : 216mm 4.Function - White Shading Correction - Gamma Correction - CIS Interface - 256 Gray Scale • CIS Operating Part: CIS use +3.3V - CIS Max Operating Freguency: 5MHz Service Manual Samsung Electronics...
  • Page 23 The controller detects the /HSYNC signal to adjust the vertical line of the image on paper. In other words after the /HSYNC signal is detected the image data is sent to the LSU to adjust the left margin on the paper. Service Manual Samsung Electronics...

  • Page 24: Toner Cartridge

    - OPC Cleaning: Electrostatic process - Management of waste toner: Electro static process(Cleanerless Type) - OPC Drum protecting Shutter: No - Classifying device for toner cartridge: ID is classified by interruption of the frame channel 0.22mW -430V -970V -580V Service Manual Samsung Electronics...

  • Page 25: H/W Structure Abd Descriptions

    3.2 H/W Structure and Descriptions SCX-4200 is roughly made up Main Control part, Operation Panel part, Scanner part, PC interface part and Power part. Each Part is separated Module which focus on common and standard design of different kind products.
  • Page 26 3) SDRAM : is used as Page Buffer in Printing, Scan Buffer in Scanning and System Working Memory Area - Size: 8Mbyte - 3.5 MB: System Working Memory Area and Scan Buffer - 4.5 MB: Printing System Working Memory Area - Max Frequency: 133MHz Service Manual 3-10 Samsung Electronics...

  • Page 27: Scan Part

    Micom part, Matrix part and LCD. 2) Micom controller Micom has ROM, RAM, I/O Port built-in and displays and lights LCD by CPU command of Main Control Part and report Key recognition Data to Main Control Board. Service Manual 3-11 Samsung Electronics...

  • Page 28: Printer Section

    - ADC Interface Unit - 2 ADC Channels are available - ADC Core maximum clock frequency: 2.5 MHz USB 2.0 Interface Package : 208-LQFP-2828 Power : 1.8V(Core), 3.3V(IO) power operation Speed : 66MHz core(ARM7TDMI) operation, 60MHz bus operation Service Manual 3-12 Samsung Electronics...
  • Page 29 System Overview Chorus 2 Block Diagram Service Manual 3-13 Samsung Electronics...
  • Page 30 THV/MHV/Supply/Dev and supplies it to the developer part for making best condition to display the image. The HVPS part takes the 24V and outputs the high voltage for THV/MHV/BIAS, and the outputted high voltage is supplied to the toner, OPC cartridge, and transfer roller. Service Manual 3-14 Samsung Electronics...
  • Page 31 - Output Voltage Rising Time : 50 ms Max - Output Voltage Falling Time : 50 ms Max - Output Loading range : 10M ~ 1000 M - Output Control Signal (BIAS-PWM) : the CPU output is HV output when PWM is low. Service Manual 3-15 Samsung Electronics...
  • Page 32 It is the power source of entire system. It is assembled by an independent module and completely common use with SCX-4200, so it is same characteristic with SCX-4200. It is mounted at the bottom of the set. It is consisted of the SMPS part, which supplies the DC power for driving the system, and the AC heater control part, which supplies the power to fuser.
  • Page 33 - Maintaining Temperature Range: -25 ~ 85 - Preserving Humidity Condition: 30% ~ 90% RH - Operating Atmospheric Pressure Range: 1atm EMI Requirement: CISPR, FCC, CE, MIC Safety Requirement: IEC950 UL1950, CSA950, C-UL, Semko, CB, CCC(CCIB),GOST, EPA, Power Save Service Manual 3-17 Samsung Electronics...

  • Page 34: Fuser Ac Power Control

    Triac (THY1) feature :12A, 600V SWITCHING Phototriac Coupler (PC102) - Turn On If Current : 15mA ~ 50mA(Design: 16mA) - High Repetive Peak Off State Voltage : Min 600V Service Manual 3-18 Samsung Electronics...

  • Page 35: S/W Structure And Descriptions

    System Overview 3.3 S/W Structure and Descriptions 3.3.1 Architecture The following diagram shows the Engine Control System. Fig 1. The architecture of the engine firmware Service Manual 3-19 Samsung Electronics...
  • Page 36 Second is a function that informs the main system of the current engine status for requested item. And there is function that calls sub-functions for specific operations that is request- ed by printer controller or printer engine firmware. Service Manual 3-20 Samsung Electronics...

  • Page 37: Paper Size

    It controls a fuser temperature and a pick-up time according to above paper type. Each control depends on its mechanism. Normally, papers with hard thickness are controlled by maintained a high temperature. But a paper like OHP is con- trolled at the lower temperature. Service Manual 3-21 Samsung Electronics...

  • Page 38: Print Mode

    If the printing job is done over the fixed time, the inner temperature of machine may be saturated. In this case, the engine keeps the temperature of the fixing unit with the specified temperature. The elapsed printing time is cleared at the sleep mode. Service Manual 3-22 Samsung Electronics...
  • Page 39 It is very important to control the temperature of the fixing unit in the printing process and there are many require- ments for it. Therefore, a Temperature Table is defined and given by the fixing unit team. See the attachment. Service Manual 3-23 Samsung Electronics...
  • Page 40 - If no error happens with above results, set up the values to mask the video data for horizontal and vertical region but if happens, it will be recovered according to the recovery sequence. Service Manual 3-24 Samsung Electronics...

  • Page 41: Transfer Roller

    ADC unit. It operates until the value is lower than a specified value. If the value is lower than a specified value, it decides an array index for the voltage and then searches an appropriate index in the table presented by the developer team Service Manual 3-25 Samsung Electronics...
  • Page 42 A user can select one of pre-defined times as power save time from Driver UI. The setting value for power save time is OFF, 5min, 10min, 15min, 30min, 45min, and 60min. The default time is 5min. Although OFF is selected, power save time is operated 2 hours to protect fuser. Service Manual 3-26 Samsung Electronics...

  • Page 43: Door Open

    LCD window. To remove the error: When the error is happened, if the user loads the paper in the paper feeder, then the error is removed. The developer team presents the cleaning process. Service Manual 3-27 Samsung Electronics...

  • Page 44: Paper Jam

    LCD window informing the error status of the user. The specified time or steps will be decided based on the mechanical design length and the paper size. . When Paper Jam2 happens, fuser and fan is off. 3.3.14 Out Bin Tray Full Service Manual 3-28 Samsung Electronics...
  • Page 45 In case of Over Heat Error, no heat is supplied to the fixing unit. When a specified time is elapsed, the engine detects a present temperature again. If the present temperature is a specified degree lower than the memorized temperature, the error is recovered. Service Manual 3-29 Samsung Electronics...
  • Page 46 Hsync Error. If this error happens, the engine stops all functions and keeps it at the error state. Also, the engine informs the error status of the main system and then the error message is displayed at LCD window to inform the error status of the user. Service Manual 3-30 Samsung Electronics...

  • Page 47: Alignment And Adjustments

    1 : On, 2 : Off (-1000V +300V/-150V) THV ON (1300V) 1 : On, 2 : Off (+1300V ± 20V) THV ADC 1300V 1 : On, 2 : Off THV ADC 600V~3550V 1 : On, 2 : Off (Compare each ADC Value) Service Manual Samsung Electronics...

  • Page 48: Paper Path

    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) Service Manual Samsung Electronics...

  • Page 49: Clearing Paper Jams

    See page 6-5 4 Insert the paper tray into the machine until it snaps into place. 5 Open and close the front cover to resume printing. Service Manual Samsung Electronics...

  • Page 50: In The Paper Exit Area

    If there is any resistance and the paper does not move when you pull or if you cannot see the paper in the jam cover, continue to step 6. Service Manual Samsung Electronics...

  • Page 51: In The Fuser Area Or Around The Toner Cartridge

    The error message may also occur when the paper is not properly fed into the machine through the manual feeder. In that case, pull the paper out of the machine. Service Manual Samsung Electronics...

  • Page 52: Printing The System Data List

    4 When the display asks you to confirm your selection, press Start The machine prints a cleaning page. Toner particles on the drum surface are affixed to the paper. 5 If the problem remains, repeat steps 1 through 4. Service Manual Samsung Electronics...

  • Page 53: Consumables And Replacement Parts

    • A paper jam has occurred in the manual • Clear the jam. feeder or the machine detects non- feeding from the manual feeder. Paper has jammed in the paper exit area. Paper Jam 2 Clear the jam. Check Inside Service Manual Samsung Electronics...

  • Page 54: Periodic Defective Image

    Heat Roller 64.0mm Black spot and image ghost Pressure Roller 75.3mm black spot on the backside MP Sensor Tramsfer Roller OPC Drum SCAN PART Heat Roller Charge Roller Pressure Roller Supply Roller Developing Roller <Rollers Layout> Service Manual Samsung Electronics...

  • Page 55: Error Message

    Scanner Error There is a problem in the scanner unit. Unplug the power cord and plug it back in. If the problem persists, please call for service. Service Manual Samsung Electronics...
  • Page 56 This key is used to stop the job being done or to exit from the Menu. And clear value of 5 copy keys.. This key is used to select the right item what customer wants from several items. Left/Right Arrow Key Service Manual 4-10 Samsung Electronics...

  • Page 57: Service Manual

    This key is used to stop the job being done or to exit from the Menu. And clear value of 5 copy keys.. Stop This key is used to select the right item what customer wants from several items. Left/Right Arrow Key LED Color LED Status Discription Green Service Manual 4-11 Samsung Electronics...

  • Page 58: Disassembly And Reassembly

    3. Unplug the power cord. 4. Use a flat and clean surface. 5. Replace only with authorized components. 6. Do not force plastic-material components. 7. Make sure all components are in their proper position. Service Manual Samsung Electronics...

  • Page 59: Front Cover

    3. 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 and then remove the Front Cover, as shown below. Cassette 2. Open the Front Cover. Front Cover Service Manual Samsung Electronics...

  • Page 60: Rear Cover

    Rear Door 2. To remove the Rear Cover make sure the Power Switch doesn't get jammed to Rear Cover and then Unplug the one connector(DC Fan) from the Main PBA, as shown below. Rear Cover Service Manual Samsung Electronics...

  • Page 61: Dc Fan

    - Rear Cover (Refer to 5.3) 2. First release the harness from the Harness Holder and then remove the one screw securing the Harness Holder and remove it, as shown below. DC Fan Harness Holder (24V, 80mA) Service Manual Samsung Electronics...

  • Page 62: Right Side Cover

    3. Apply light pressure to the back of the Right Side Micro Switch and remove it. Cover and pull it to the right side in the direction of arrow, as shown below. Right Side Cover Micro Switch Right Side Cover Service Manual Samsung Electronics...

  • Page 63: Left Side Cover

    - Front Cover (Refer to 5.2) shown below. - Rear Cover (Refer to 5.3) 2. Remove the one screw at the front of the unit. Left Side Cover Service Manual Samsung Electronics...

  • Page 64: Scanner Unit

    OPE Unit with a light pressure to the direction of arrow. 3. Carefully lift the Scanner Unit from the base taking care to thread the cables through the frame. Scanner Unit CIS FFC OPE Unit Scan Motor Service Manual Samsung Electronics...
  • Page 65 CIS FFC from the CIS and remove two CIS Slider from each end of the CIS. Then Release the CIS in the direction of arrow, as shown below. CIS Slider CIS Slider CIS FFC Carriage Service Manual Samsung Electronics...
  • Page 66 Pulley Idle Pulley Bracket Carriage Belt Belt Clip 12. Take the CIS Shaft out of OPE Lower Unit and then remove the three screws securing the Scan Motor Ass'y and remove it. CIS Shaft Scan Motor Ass'y Service Manual Samsung Electronics...

  • Page 67: Ope Unit

    1. Lift the Platen Cover upward and remove it. 2. To remove OPE Unit, first pull the part below the front of the OPE Unit with a light pressure to the direction 4. Release the Keys. of arrow. OPE Unit LED Cap Service Manual 5-10 Samsung Electronics...

  • Page 68: Middle Cover Unit

    1. Before you remove the Middle Cover Unit, you should remove: - Scanner Unit (Refer to 5.7) 2. Remove the four screws securing the Middle Cover Unit and remove it, as shown below. Middle Cover Unit Service Manual 5-11 Samsung Electronics...

  • Page 69: Fuser

    Harness from both side of the Halogen Lamp, as shown below. Then take the Halogen Lamp out of the Heat Roller. Fuser Heat Roller Halogen Lamp Notice: Remove the Fuser taking care not to damage the Exit Sensor. Service Manual 5-12 Samsung Electronics...
  • Page 70 8. Unwrap the Thermistor Harness, as shown below. RDCN(25/15) and remove it. Thermister Harness Gear RDCN(25/15) 9. Remove the Thermistor from the Fuser Cover. 7. Remove the four screws and divide the Fuser into two parts. Thermister Service Manual 5-13 Samsung Electronics...

  • Page 71: Exit Roller

    2. Remove the Exit Gear and Bearing using a screw dri- ver at one end then remove the shaft and rollers, as shown below. Exit Gear Bearing Roller Exit F/Down Roller Exit Main Roller Exit FR Holder Service Manual 5-14 Samsung Electronics...

  • Page 72: Lsu

    - Scanner Unit (Refer to 5.7) - Middle Cover Unit (Refer to 5.9) 2. Remove the one screw securing the CAP LSU and remove it. CAP LSU 3. Unplug the two connectors from the LSU. Service Manual 5-15 Samsung Electronics...

  • Page 73: Fan

    . Left Side Cover (Refer to 5.6) Drive Ass'y 2. Remove the six screws securing the Drive Ass'y. Notice: When refitting the Drive Ass'y tighten the screws in the order that they are numbered on the Drive Ass'y base plate. Service Manual 5-16 Samsung Electronics...

  • Page 74: Engine Shield Ass'y

    2. Unplug the Engine Harness and remove the two remove: screws from the Main PBA. Then lift the Main PBA - Engine Shield Ass'y (Refer to 5.15) out, as shown below. Main PBA Engin Harness Service Manual 5-17 Samsung Electronics...

  • Page 75: Smps

    2. Remove the two screws then take the Inlet Bracket out, as shown below. Inlet Bracket 3. Unplug the Engine Harness from the SMPS and then remove the one screw securing the ground cable, as shown below. Engine Harness Service Manual 5-18 Samsung Electronics...

  • Page 76: Crum Pcb

    1. Before you remove the CRUM PCB, you should remove: - LSU (Refer to 5.12) - Engine Shield Ass'y (Refer to 5.15) 2. Remove the four screws securing the CRUM PCB and remove it, as shown below. CRUM PCB Service Manual 5-19 Samsung Electronics...

  • Page 77: Transfer Roller

    3. Unplug the PTL PBA Harness then remove the PTL Holder and PTL Lens, as shown below. Take care to note the orientation of the PTL Lens and ensure it is refitted correctly. Lens Holder PTL PBA Harness Service Manual 5-20 Samsung Electronics...

  • Page 78: Feed Roller

    Guide Paper 5. Remove the Idle Gear and Feed Gear2. Feed Gear2 3. Pull up the Feed Idle Bush and Feed Idle Shaft, as shown below. Feed Idle Shaft Spring Idle Gear Bush Service Manual 5-21 Samsung Electronics...
  • Page 79 Disassembly and Reassembly 6. Remove the Feed Gear1 Ass'y, as shown below. 7. Pull the Feed Roller and Feed Roller1, as shown below. Feed Gear1 Feed Roller Ass'y Feed Roller1 Service Manual 5-22 Samsung Electronics...

  • Page 80: Pick Up Roller & Solenoid

    3. To remove the Pick Up Ass'y, first lift the notch attached to the Bush so that it's released from the shaft, then slide the Pick Up Ass'y from right to left and it will be released completely, as shown below. Bush Pick Up Ass'y Service Manual 5-23 Samsung Electronics...
  • Page 81 Disassembly and Reassembly Service Manual 5-24 Samsung Electronics...

  • Page 82: Troubleshooting

    Remove if found. 5. Contamination of the OPC drum. 5. If the problems are not solved, replace the toner cartridge. Service Manual Samsung Electronics...

  • Page 83: Horizontal Black Bands

    If the roller's life is expired, transfer roller's life has expired. replace it. Note. Cleaning the inside of the set to remove excess toner particles or paper dust will reduce the occurrence of this problem.. Service Manual Samsung Electronics...

  • Page 84: Light Image

    Note if 1 and 2 do not resolve the problem Digital Printer and the problem persists replace the HVPS. 3. VD0 signal of the Main PBA is Low state. 3. Replace the LSU Unit or Main PBA. Service Manual Samsung Electronics...

  • Page 85: Uneven Density

    4. Is the movement(Up and Down) of 4. Clean the transfer roller bushes. the transfer roller smooth? 5. Is the HVPS normal? 5. Clean the high voltage charge terminals. If this does not resolve the problem replace the HVPS. Service Manual Samsung Electronics...
  • Page 86 Digital Printer OHP, a higher transfer voltage is required. Remember to set back to normal paper after Digital Printer use. Digital Printer Digital Printer Service Manual Samsung Electronics...
  • Page 87 Digital Printer toner cartridge. Digital Printer 2. If the transfer roller is contaminated, run Digital Printer PC Cleaning Mode Print 2 or 3 times and Digital Printer then perform Self-Test 2 or 3 times to remove contamination. Service Manual Samsung Electronics...
  • Page 88 3. When the printer turns on, several blank pages print. Check and Cause Solution 1. Abnormal solenoid. 1. Perform the engine self test using TECH Mode to check if the Solenoid is normal. If the problem persists replace the main Service Manual Samsung Electronics...

  • Page 89: Copy Problems

    Black page is printed out when Copying. Check and Cause Solution 1. Check for CIS problem on the Main PBA. 1. Check the CIS harness is properly connected. 2. Check shading profile. 2. Redo shading profile in the tech mode. Service Manual Samsung Electronics...

  • Page 90: Defective Image Quality

    2. Check the gap between original and scanner 2. A gap of more than 0.5 mm can cause a blurred glass. image. Ensure cover close correctly. Replace as necessary. 3. Check printing quality. 3. See "Print" troubleshooting. Service Manual Samsung Electronics...

  • Page 91: Wrong Print Position

    6 If the paper feeds into the printer and 6. Check the SMPS PBA, Main PBA and Jam 0 occurs, perform Tech Mode to all connections. Replace any faulty check feed sensor. parts or the Service Manual 6-10 Samsung Electronics...
  • Page 92 Check all ribs, claws and springs. • It occurs when the Spring of a Guide claw is broken or damaged. • It occurs when the Heat-Roller or Pressure-Roller is seriously contaminated with toner. Service Manual 6-11 Samsung Electronics...

  • Page 93: Paper Rolled In The Fuser

    Clean the surface of the rollers with IPA or water 2. Damaged or deformed ribs, claws or springs. 2. Check for damage or deformation of the print claws and the holder plate claws, and repair or replace as appropriate. Service Manual 6-12 Samsung Electronics...

  • Page 94: Paper Rolled On The Opc Drum

    Use the gearwheel at the side to rotate the OPC drum and pull the paper from the cassette. • Clean fingerprints on the OPC gently with soft tissue, taking care not to scratch the surface. Service Manual 6-13 Samsung Electronics...

  • Page 95: Fuser Error

    Use TECH mode to test the LSU - Replace the LSU 2. LSU motor is faulty. - Replace a main board if the same error persists after replacing a LSU. 3. Check the HSYNC signal. Service Manual 6-14 Samsung Electronics...
  • Page 96 1. Deformed paper sensor actuator or faulty sensor. 1. Replace the defective actuator or sensor. 2. SMPS PBA or Main PBA is defective 2. Replace the SMPS PBA or MAIN PBA as appropriate. 3. Faulty cables or connectors. Service Manual 6-15 Samsung Electronics...

  • Page 97: Cover Open

    2. The tab on the front cover may be damaged or broken 2. Replace the front cover. 3. Check the connector and cables between Switch and 3. Replace the Main Control board or Cover Open main PBA. S/W as necessary. Service Manual 6-16 Samsung Electronics...
  • Page 98 1. Use TECH mode(“cover sensor test”) to check cover switch operation. Check and replace switch if necessary. 2. Check the connector and cables between Switch and main PBA. 2. Replace the Main Control board or Cover Open S/W as necessary. Service Manual 6-17 Samsung Electronics...

  • Page 99: Defective Motor Operation

    2. LCD panel does not come on but normal start up 2. Replace the OP panel. sounds are heard. 3. After replacing SMPS display does not come on and no 3. Replace the main PBA panel. start up sounds are heard. Service Manual 6-18 Samsung Electronics...
  • Page 100 When printing, vertical lines are not straight. Check and Cause Solution 1. Check stability of 24V supply to LSU. 1. 24V stable - Replace LSU. 24V unstable replace SMPS, if the problem persists replace the main PBA. Service Manual 6-19 Samsung Electronics...

  • Page 101: Service For The Life Of Toner Cartridge

    Troubleshooting 6.5 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. 6.5.1 Precautions on Safe-keeping of Toner Cartridge Excessive exposure to direct light for more than a few minutes may cause damage to the cartridge.
  • Page 102 (a) Check that the terminals problem persists replace the (contact points) of the toner cartridge. cartridge and the set are clean. (b) Check that the terminals (contact points) of the toner cartridge and the set are not damaged. Service Manual 6-21 Samsung Electronics...
  • Page 103 (contact point) of the toner toner cartridge is recycled over cartridge and the set are not 2 times. damaged. If ‘nearly empty’ cartridges are collected for re-use this is judged as recycling the toner cartridge. Service Manual 6-22 Samsung Electronics...
  • Page 104 (a) Check if foreign substances are stuck to the terminal (point of contact) of the toner cartridge or set. (b) Check if the terminal assembly is normal. (Especially check the developer roller terminal.) Service Manual 6-23 Samsung Electronics...

  • Page 105: Abnormal Printing

    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...

  • Page 106: Spool Error

    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 6-25 Samsung Electronics...

  • Page 107: Block Diagram

    Block Diagram 7. Block Diagram 7.1 System Block Diagram Service Manual Samsung Electronics...

  • Page 108: Exploded Views And Parts List

    This format is used throughout Samsung on all product ranges. Typically it is used for small components and electronic parts. This format is controlled by individual Samsung Divisions and is used on specific products, typically for mechanical parts. Type 2 format part numbers fall into 2 categories: Assemblies consisting of 2 or more parts.
  • Page 109 Exploded Views & Parts List 8.1 Main Exploded View Service Manual...
  • Page 110 Exploded Views & Parts List 8.2. Housing Base Exploded View Service Manual...
  • Page 111 Exploded Views & Parts List 8.3. Frame Assembly Exploded View Service Manual...
  • Page 112 Exploded Views & Parts List 8.4. Fuser Unit Exploded View Service Manual...
  • Page 113 Exploded Views & Parts List 8.5. Drive Assembly Exploded View Service Manual...
  • Page 114 Exploded Views & Parts List 8.6. Scan Assembly Exploded View Service Manual...
  • Page 115 Exploded Views & Parts List 8.7. OPE Assembly Exploded View Service Manual...
  • Page 116 Exploded Views & Parts List 8.8. Cassette Assembly Exploded View Service Manual...
  • Page 117 Service Parts List(Model: SCX-4200/XAX) SA : SERVICE AVAILABLE SNA : SERVICE not AVAILABLE DNA : DELIVERY not AVAILABLE Drawer# SEC_Code Description&Specification Location Service 8.1-1 JC96-03807A ELA HOU BASE-HOUSING;SCX-4200,SEC,-,-,-, 8.1-2 3103-001085 FAN-DC;24V,80mA,4800rpm,-,0.131mmH20 Z4126 8.1-3 JC61-01643A HOLDER-M_HARNESS;SCX-4200,ABS, HB,2.0,15 8.1-5 JC31-00004A FAN-DC_HAWK;ML-6060,24.0V,2800rpm,15m^3/ F5018 8.1-6...
  • Page 118 8.4-3 JC61-00064A SPRING ETC-CLAW;ML-5200A,SUS 304 WPB,?0. B2031 8.4-4 JC72-40361A PMO-ROLLER_EXIT;SCF(XR),POM,NATURAL,-,M9 R0015 8.4-5 JC61-70976A SPRING ETC-FUSER EXIT;ML-7000,SUS304-WPB S0021 8.4-6 JC47-00013A THERMOSTAT-_170;SCX-4200,-,125V/250V,15A 8.4-10 JC66-01204A GEAR-RDCN 25/15;SCX-4200,PA6T,FR52G30LX, 8.4-11 JC39-00404A CBF HARNESS-FUSER JOINT;ML-1610,WIRE HAR H1089 8.4-12 JC39-00558A HARNESS-FUSER;SCX-4200,UL3122 #18,UL 312 8.4-13 1404-001298 THERMISTOR-NTC;7KOHM,-,3370K,0.3MW/C,-,- W3071...
  • Page 119 Z4169 8.4-S1 6003-000301 SCREW-TAPTITE;BH,+,S,M4,L6,ZPC(YEL),SWRC 8.4-S1 6003-000269 SCREW-TAPTITE;BH,+,-,S,M3,L6,ZPC(YEL),SW Z4170 8.4-S4 6006-001078 SCREW-TAPTITE;WSP,PH,+,M3,L10,ZPC(YEL),S 8.5-1 JC61-00598B BRACKET-P-GEAR 1400;SCX-4200,SECC+SUM24L 8.5-2 JC66-01203A GEAR-DRV FUSER OUT;SCX-4200,POM,0.8,53,- 8.5-3 JC66-00340A GEAR-HUB CLUTCH;SCX-5100,POM,M0.8,Z13,-, C9033 8.5-4 JC66-01202A GEAR-DRV FUSER IN;SCX-4200,PA6T,0.8,26,- 8.5-5 6031-000023 WASHER-PLAIN;-,ID5.9,OD10.0,T0.5,BLK,POL W0001 8.5-6 JC66-00391A GEAR-RDCN 113/33;ML-1400,POM(DELIN 8903) G0381 8.5-7...
  • Page 120 JC61-01641A GUIDE-M-HANDLE;SCX-4200,HIPS, HB,T2.2,28 8.8-19 JC66-00719A CAM-M-KNOCK UP;ML-1750,POM(KOLON K700),- 8.8-20 JC73-00141A RPR-PAD CASSETTE;ML-1510,URETHANE SPONGE R0020 Replacement JC69-00932A BOX(P)-MAIN;SCX-4200/XAA,DW,OFFSET4,321, #N/A JC68-01653A MANUAL-QIG;SCX-4200,SAMSUNG,ENGLISH,U.S. #N/A JC96-02663C ELA ETC-SHIELD PCB;SCX-4200,SAMSUNG,-,-, #N/A JC96-03206A ELA UNIT-SMPS V1 #N/A JC96-03826A ELA HOU-ENGINE;SCX-4200,SEC,-,-,-,-,- #N/A JC99-01937A PAA-PACKING;SCX-4200/XAA,US,-,-,-,- #N/A JC99-01939J PAA WOOD-LABEL;SCX-4200/XAX,SEM,-,-,-,- #N/A JC99-01946K INA-ACCESSORY;SCX-4200/XAX,SAMSUNG,-,EIG...
  • Page 121 JC68-10934F LABEL(P)-NOM(BOX);COMMON,XAX,ART,100G,0. #N/A JC69-00933A CUSHION-MAIN(R);SCX-4200/XAA,EPS,-,506,1 #N/A JC69-00933B CUSHION-MAIN(L);SCX-4200/XAA,EPS,-,506,1 #N/A JC92-01477A PBA MAIN-DEV;ML-2150,SEC,KOREA,DEV B'D,- #N/A JC94-01097A PHANTOM AU JC92-01762A #N/A JC96-03806A ELA UNIT-SCAN LOWER;SCX-4200,SEC,-,-,-,- #N/A JC97-02430A MEA-DEVE KIT;SCX-4200,SEC,-,-,-,-,- #N/A 0201-001162 ADHESIVE-CYA;LOCTITE403,NTR,1250,20G #N/A 0201-001183 ADHESIVE-AA;ARON ALPHA #202F,NTR,100,20G #N/A 0202-001459 SOLDER-CREAM;S3X58-M405,-,D20~38§-,96.5SS #N/A 0203-001189 TAPE-ACETATE;#810,T0.05,W12,L65000,TRP,- #N/A 0205-000005 GREASE-BEARING;EP56,DIAMOND HYDRO FLUID,...
  • Page 122 JC39-00243A CBF HARNESS-PTL;ML-1710,CBF,UL 1061,2P,2 H1212 #N/A JC39-00576A CBF HARNESS-CRUM2;SCX-4200,CBF,UL1061,5P #N/A JC41-00179A PCB-DEV B'D;ML-2150,FR-1,1LAYER,-,1.6T,5 #N/A JC41-00246A PCB-SUB (1LAYER);SCX-4920N,FR-1,1,-,1.6T #N/A JC41-00323A PCB-MAIN;SCX-4200,FR4,2 L,-,1.6T,185MM * #N/A JC61-00025A SPRING ETC-CS-CHARGE APOLLO;SF-5100,SUS B2030 #N/A JC61-00035A SPRING ETC-HV APOLLO;SF-5100,SUS304WPB,0 #N/A JC61-00063A SUPPORT-SEAL;ML-7000,POLYURETHANE FOAM,T #N/A JC61-00605A PLATE-P-CLAW;ML-1710,SUS304-CSP,0.1,-,-,...
  • Page 123 Drawer# SEC_Code Description&Specification Location Service #N/A 3711-003411 HEADER-BOARD TO CABLE;BOX,5P,1R,2mm,STRA #N/A JC07-00003A LCD-DISPLAY(XEV);VHX1620BHRC9,SCX-5312F/ #N/A JC39-00306A CBF HARNESS-LCD;CLP-500,WIRE,UL2877,14-1 #N/A JC39-00560A HARNESS-SWITCH;SCX-4200,CBF,UL 1061,4P,2 #N/A JC39-40511A CBF HARNESS;ML-80,JUMPER,AWG22,52mm,SILV #N/A JC41-00171C PCB-PTL (1LAYER);SCX-4100,FR-1,1,-,1.6T, #N/A JC41-00324A PCB-SWITCH;SCX-4200,FR-1,1,-,1.6T,33X25M #N/A JC61-00597A BRACKET-P-BLADE;ML-1710,SPCC+NI,1.2,242, #N/A JC66-00012A GEAR-OPC R;SF-5100,POM(M90-44),BLK,M0.6, #N/A JC66-00018A GEAR-CHARGE ROLLER;SF-5100,POM(F20-03),M...

  • Page 124: Connection Diagram

    Connection Diagram 9. Connection Diagram 9.1 SCX-4200 Connection Diagram Service Manual Samsung Electronics...

  • Page 125: Schematic Diagram

    REV 0.3 ASIC (CHORUS 2) SDRAM, FLASH ROM LSU, SMPS, PANEL, COVER OPEN == MEMO == CIS, SCAN MOTOR FUSER, MAIN MOTOR, CLUTCHES PTL, FAN2 USB2.0, CRUM Service Manual 10-1 Samsung Electronics This Document can not be used without Samsung’s authorization.

  • Page 126: Main Board

    Main Board(2/7) Schematic Diagram INSTPAR INSTPAR Service Manual 10-2 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 127 DQ15 DQ14 DQ13 DQ12 DQ11 DQ10 *RAS *CAS VDD1 VDD2 VDD3 VDDQ1 VDDQ2 VDDQ3 VDDQ4 *LDQM VSS1 *HDQM VSS2 VSS3 VSSQ1 VSSQ2 VSSQ3 CLKE VSSQ4 K4S641632H-TC75 Service Manual 10-3 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 128 Main Board(4/7) Schematic Diagram Not used Service Manual 10-4 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 129 Main Board(5/7) Schematic Diagram INSTPAR Not Used Not Used Not Used Service Manual 10-5 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 130 Main Board(6/7) Schematic Diagram Service Manual 10-6 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 131 Main Board(7/7) Schematic Diagram Service Manual 10-7 Samsung Electronics This Document can not be used without Samsung’s authorization.

  • Page 132: Ope Circuit Diagram

    Schematic Diagram BASIC (LCD1) BASIC (LCD1) CHIN CHINA/KOREA (LCD2) A/KOREA (LCD2) MI MICO CO M M (U1) (U1) JB13-00004A JB13-00004A JB13-00035A JB13-00035A JB07-00004A JB07-00004A JC07-00008A JC07-00008A Service Manual 10-8 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 133 10.3 SMPS-110V(1/4) Schematic Diagram Service Manual 10-9 Samsung Electronics This Document can not be used without Samsung’s authorization.

  • Page 134: Smps-110V

    SMPS-110V(2/4) Schematic Diagram Service Manual 10-10 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 135 SMPS-110V(3/4) Schematic Diagram Service Manual 10-11 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 136 SMPS-110V(4/4) Schematic Diagram Service Manual 10-12 Samsung Electronics This Document can not be used without Samsung’s authorization.

  • Page 137: Smps-220V

    10.3 SMPS-220V(1/4) Schematic Diagram Service Manual 10-13 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 138 SMPS-220V(2/4) Schematic Diagram Service Manual 10-14 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 139 SMPS-220V(3/4) Schematic Diagram Service Manual 10-15 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 140 SMPS-220V(4/4) Schematic Diagram Service Manual 10-16 Samsung Electronics This Document can not be used without Samsung’s authorization.

  • Page 141: Reference Information

    M2 long, M2 short). Spring Hook Standard : For general use Tweezers Standard : For general home use, small type. Software(Driver) installation CD ROM Cotton Swab Standard : For general home use, for medical service. Service Manual 11-1 Samsung Electronics...

  • Page 142: Acronyms And Abbreviations

    Integrated Drive Electronics EEPROM Electronically Erasable Programmable Read Only Memory IEEE Institute of Electrical and Electronics Engineers. Inc Electro Magnetic Interference Image Output Terminal (Color print- Electro photographic er, Copier) Enhanced Parallel Port Isopropy Alcohol Service Manual 11-2 Samsung Electronics...
  • Page 143 Read Only Memory Liquid Crystal Display SCF/SCT Second Cassette Feeder/Second Cassette Tray Light Emitting Diode SMPS Switching Mode Power Supply Laser Scanning Unit SPGP Samsung Printer Graphic Megabyte Processor Multi-Functional Product Samsung Printer Language Megahertz Spool Simultaneous Peripheral Operation Online MPBF...

  • Page 144: Select A Location For The Printer

    • 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 Service Manual 11-4 Samsung Electronics...

  • Page 145: A4 Iso 19752 Standard Pattern

    Reference Information 11.4 A4 ISO 19752 Standard Pattern This test page is reproduced at 70% of the normal A4 size Service Manual 11-5 Samsung Electronics...

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