Samsung ML-1640 Service Manual
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Samsung ML-1640 Service Manual

Samsung ML-1640 Service Manual

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SERVICE
LASER PRINTER
ML-1640/ML-2240
Model : ML-1645/XEV
Basic Model : ML-1640
Manual
The keynote of Product
- Speed
ML-1640 : 16 ppm (A4), 17 ppm( Ltr)
ML-2240 : 22ppm (A4), 23 ppm (Ltr)
- Emulation : GDI
- Processor : 150 Mhz Jupiter4e CPU
- Memory : 8 MB
- Toner cartridge : Initial (0.7K), Sales (1.5K)
- MP tray : Only ML-2240
- Interface : Full Speed USB 2.0
- Machine life : 50K (pages)

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Summary of Contents for Samsung ML-1640

  • Page 1 Manual LASER PRINTER The keynote of Product - Speed ML-1640 : 16 ppm (A4), 17 ppm( Ltr) ML-2240 : 22ppm (A4), 23 ppm (Ltr) - Emulation : GDI - Processor : 150 Mhz Jupiter4e CPU - Memory : 8 MB - Toner cartridge : Initial (0.7K), Sales (1.5K)
  • Page 2 GSPN (Global Service Partner Network) North America : service.samsungportal.com Latin America : latin.samsungportal.com CIS : cis.samsungportal.com Europe : europe.samsungportal.com Samsung Electronics Co.,Ltd. January 2008 China : china.samsungportal.com Printed in Korea. Asia : asia.samsungportal.com VERSION NO. : 1.00 CODE : 1645-D00XEV...

  • Page 3: Table Of Contents

    Contents 1. Precautions 1.1 Safety Warning 1.2 Caution for safety 1.3 ESD Precautions 2. Product spec and feature 2.1 Product Specifications 2.1.1 Product Overview 2.1.2 Specifications 2.1.3 Model Comparison Table 2.1.4 Accessory List 2.2 System Overview 2.2.1 System Outline 2.2.2 H/W Structure and Descriptions 2-12 2.2.3 S/W Structure and Descriptions 2-25...
  • Page 4 4-28 4.2.4 Bad Software Environment 4-37 4.2.5 Bad image 4-42 5. Exploded Views & Parts List 5.1 Main Assembly 5.2 Frame Assembly(ML-2240) 5.3 Frame Assembly(ML-1640) 5.4 Fuser Unit 5.5 Paper Path Unit 5-11 5.6 MP Tray Assembly (Only ML-2240) 5-13...
  • Page 5 Continued 6. System Diagram Reference Information 7.1 Troubleshooting Tools 7.2 Acronyms and Abbreviations 7.3 Selecting printer locations 7.4 Sample Tests Patterns 7.5 Parts Life Cycle Maintenance Table 7.5.1 Parts Life Cycle Maintenance Table 7.5.2 Toner Cartridge Criterion 7.6 Model Information 7.6.1 Understanding for Model Code 7.6.2 Understanding Material Code &...

  • Page 6: Precautions

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

  • Page 7: Safety Caution

    (12) Turn off the power and take off the plug when smoke, strange smell, or sound from the machine. If you keep using it, a fire can be occurred. (13) Do not insert steel or metal piece inside/outside of the machine. Do not put steel or metal piece into a ventila- tor. An electric shock could happened. Service Manual Samsung Electronics...

  • Page 8: Handling Precautions

    (7) Be careful not to change the location of small parts such as screws when assembling and disassembling. (8) Do remove dust or foreign matters completely to prevent fire of tracking, short, or etc. (9) After finished repair, check the assembling state whether it is same as before the repair or not. Service Manual Samsung Electronics...

  • 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. Service Manual Samsung Electronics...

  • Page 10: Product Spec And Feature

    Marketing target Personal use Main Specification * speed ML-1640 : 17 ppm (Ltr) / 16 ppm (A4) ML-2240 : 23 ppm (Ltr) / 22 ppm (A4), * 150MHz Jupiter4e CPU/ 8M memory * Toner Cartridge : Initial (0.7K), Sales (1.5K) * Machine Life : 50K 2.1.2 Specifications...

  • Page 11: Print Engine

    Product spec and feature Item ML-1640 ML-2240 Average Monthly Print Volume 140pages 170pages Machine Life 50,000pages 50,000pages Temperature Operating 10~32 10~32 Non Operating -20~40 -20~40 Humidity Operating 20~80% 20~80% Non Operating 10~90% 10~90% Altitude Max 8,200ft Max 8,200ft 2.1.2.2 Print Engine...

  • Page 12: Paper Handling

    Product spec and feature 2.1.2.3 Paper Handling Item ML-1640 ML-2240 Capacity(20 lbs) Main Tray 150sheets 150sheets Bypass Optional Cassette Output Capacity Face Down: 50Sheets/20lb Face Down: 100Sheets/20lb Output Control Face down Face down Paper Size Auto Feeding A4, Letter, Legal, Oficio, Folio, Executive,...
  • Page 13 Product spec and feature 2.1.2.5 Consumables Item ML-1640 ML-2240 Pickup Roller 50 K 50 K Pad Unit 50 K 50 K Transfer Roller 50 K 50 K Fuser Unit 50 K 50 K Toner Life Initial : 0.7K pages Initial : 0.7K pages Sales : 1.5K pages...

  • Page 14: Model Comparison Table

    Product spec and feature 2.1.3 Model Comparison Table ML-1640 ML-2240 Remark Jupiter 4e Jupiter 4e same Code Legacy Platform A4 : 16ppm / Letter : 17ppm A4 : 22ppm / Letter : 23ppm Memory Dev. Fuse No. (New Drum Detection : By CRUM) No.

  • Page 15: System Overview

    Product spec and feature 2.2 System Overview 2.2.1 System Outline Paper Path Layout Service Manual Samsung Electronics...
  • Page 16 Product spec and feature Unit Layout Panel HVPS Motor SMPS Main PBA Service Manual Samsung Electronics...
  • Page 17 Fuser/Exit 2.2.1.4 FUSER The fuser is consisted of the Heat Lamp,Heat Roller,Pressure Roller,Thermister and Thermostat. It adheres the toner on the paper with pressure and heat to complete the printing job. - Life Cycle : 50K(pages) Service Manual Samsung Electronics...
  • Page 18 . Heat Lamp Terminal Shape : Terminal Single Type . Voltage 120 V : 115 +/- 5 % 220 V : 230 +/- 5 % . Capacity : 600 Watt (ML-1640), 750 Watt (ML-2240) +/- 5 % . Life : 3000 Hr 2) Thermostat .
  • Page 19 LSU to arrange the its margin on the paper. The one side of the polygon mirror is one line for scanning.. OPC Drum Photo Diode Polygon Mirror Polygon Motor Motor Driver LD Driver circit LD(Laser Diode) Protector panel 2-10 Service Manual Samsung Electronics...

  • Page 20: Toner Cartridge

    - Management of disusable toner: Collect the toner by waste bottle - OPC Drum protecting Shutter: None - Classifying device for toner cartridge: ID is classified by CRUM (Toner sales) Max -1.4KV Cleaning Blade -100V Cleaning Roller 0.20mW -720V -150V¡Ø -350V +5KV -550V 2-11 Service Manual Samsung Electronics...

  • Page 21: H/W Structure And Descriptions

    Flash Memory 0.5M Byte 2.2.2.1(a) Main Control ML-1640/2240 of Main Control are composed of CPU and Print and operate follows function by CPU - Bus Control, I/o - Handling, each Driver and PC Interface Main Control operate its full function on the Main B'd and CPU control Controller ASIC and build-in Memory.
  • Page 22 - Folio : 208 x 325 mm - Top Margin : 4.23 3 mm - Left, Right Margin : 4.23 3 mm 7) CRU(Toner Cartridge)Life : 1,500pages Printing(A4, 5% Pattern Printing) 8) First Print Out Time : 10sec( Standby ) 2-13 Service Manual Samsung Electronics...

  • Page 23: Main Board

    Main Board are composed of Engine and Controller on the one-Board. Main Board control to send Current Imagedml Video Data to LSU to print and have motor Driving and Circuit for the current driving and also include Paper Exit Sensor, Cover Open s/w, panel s/w. 2-14 Service Manual Samsung Electronics...
  • Page 24 BLDC Motor connector(CN9) - It connects an main motor and drive a BLDC Motor. HVPS connector(CN13) - It connects a HVPS. DCU connector(CN8) - It interface a DCU-JIG USB connector(CN10) - It interface a the printer. 2-15 Service Manual Samsung Electronics...
  • Page 25 - Programmable recovery time for slow devices - Allows to access peripheral devices such as GPIO control logic 6. Directly connected to 1 external ROM bank (ROMC) - 32 MB size for one ROM bank - One external flash memory attachable. 2-16 Service Manual Samsung Electronics...
  • Page 26 - 4 channels ADC interface for analog devices such as temperature sensor. - Programmable ADC Clock Cycle. - Automatic or Manual AD Conversion support. - 4 Special Function Registers for monitoring the ADC results for 4 channels. 2-17 Service Manual Samsung Electronics...
  • Page 27 17. Miscellaneous - Mux controlled 24 GPI, 28 GPO & 5 GPIO ports . - Mutual exclusive GPO/GPIO ports control by the port control enable register - Programmable Bus Master Priority. - Project code added. 2-18 Service Manual Samsung Electronics...
  • Page 28 2.2.2.4(c) Jam Cover/Cover Open Sensing ML-1640/2240 uses two M/S:one senses the cover open and the other senses the jam cover open. The cover open sensor is located on the left bottom of HVPS.When the front cover is open, +24V supplied to each unit (DC fan, Solenoid, Main Motor, Polygon Motor Unit of LSU in Fusing Unit, and HVPS) is interrupted.
  • Page 29 SMPS has two output channels. Which are 5V and +24V Micro Switch CON1(Inlet) F1(Fuse/250V, 5A) Power Switch CON2 (Output) Exit Sensor Pin Signal <CON2> Pin No Pin Name +24VS2 +24V +24VS1 +24VS1 DGND DGND P_REGI FUSER ON 2-20 Service Manual Samsung Electronics...
  • Page 30 . Running Current : under 40A PEAK (AT 25 , COLD START) under 50A PEAK (In other conditions) . Rising Time : within 2Sec . Falling Time : over 20ms . Surge : Ring Wave 6KV-500A (Normal, Common) 2-21 Service Manual Samsung Electronics...
  • Page 31 - Output Voltage Fluctuation range: PWM Control - Input contrast of the output stability degree : 5 % or less - Loading contrast : 5 % or less - Output Voltage Rising Time : 50 ms Max 2-22 Service Manual Samsung Electronics...
  • Page 32 - Output Loading range : 10 ~ 1000 - Output Control Signal (BIAS-PWM) : the CPU is HV output when PWM is low. LED2 (Toner Save LED) LED1 Switch (Error LED) Supply Micro Switch Input 2-23 Service Manual Samsung Electronics...

  • Page 33: Fuser Ac Power Control

    1) Triac (THY1) feature :16A, 600V SWITCHING 2) Phototriac Coupler (PC3) . Turn On If Current : 16mA . High Repetive Peak Off State Voltage : Min 600V 2-24 Service Manual Samsung Electronics...

  • Page 34: S/W Structure And Descriptions

    ML-1640/2240. 2.2.3.1 Introduction This Engine Control Firmware is a program that controls LBP Engine of the ML-1640/2240. This firmware is executed every 10msec as an interrupt routine of the main system. At stand-by state, this firmware monitors the enable print command from the main system. If the enable print command is detected, this firmware controls the Engine Mechanism according to the printing process and paper feeding state.
  • Page 35 Main F/W of the printer controller Initial Engine F/W Device Units Fixing Unit Interface Control Module HVPS Engine Main Control Module Fan Unit Motors Solenold & Sensing & Unit Control Module Clutch Hardware Devices & Mechanical Device 2-26 Service Manual Samsung Electronics...
  • Page 36 The third one is a fan control function that controls the fan unit. And the last one sets the flag that describes the present status of each sensor. 2-27 Service Manual Samsung Electronics...
  • Page 37 Get A DC Value (Tempe rature, .. ) Control the fixing unit & Check error condition for the fixing unit Control the fan unit Get status value of each sensor & Set present status flag of each sensor 2-28 Service Manual Samsung Electronics...

  • Page 38: Initial Product Installation

    Product spec and feature 2.2.4 Initial Product Installation 2.2.4.1 Accessory List Remove the printer and all accessories from the packing carton. Make sure that the printer has been packed with the following items: 2-29 Service Manual Samsung Electronics...

  • Page 39: Replacing Toner

    2. Grasp the front cover and pull it toward you to open. 5. Locate the cartridge slots inside the machine, one on each side. 3. Remove the toner cartridge from its bag and remove the cap protecting the cartridge by pulling the packing tape. 2-30 Service Manual Samsung Electronics...
  • Page 40 7. Close the front cover. Make sure that the cover is Insert the cartridge in the machine until it snaps into securely closed. If the cover is not firmly closed, place. printing errors may occur when you print. 2-31 Service Manual Samsung Electronics...

  • Page 41: Loading Paper

    2. Prepare a stack of paper for loading by flexing or fanning them back and forth. Straighten the edges on a level surface. 3. Load paper with the print side facing up. Make sure that all four corners are flat in the tray. 2-32 Service Manual Samsung Electronics...

  • Page 42: Installing Printer Software

    Pentium II 933 Ghz or higher Window 98/Me/2000 64 MB or higher Window XP 128 MB or higher Free Disk Space Window 98/Me/2000 300 MB or higher Window XP 1 GB or higher Internet Explorer 5.0 of higher 2-33 Service Manual Samsung Electronics...

  • Page 43: 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 44: Front Cover

    Hook force 2. If necessary, remove the cassette cover as the same 4. Take out the MP tray after remove the toner cartridge. way. Service Manual Samsung Electronics...

  • Page 45: Main Cover

    1. Remove the SMPS cover after remove the 2 screws. 2. Release the SMPS cover after unplug the 1 connector And remove the 2 screws from the rear bottom of from Main PBA. SET. 3. Lift the Main Cover after remove the 2 screw. Service Manual Samsung Electronics...

  • Page 46: Fuser Unit

    Disassembly and Reassembly 3.2.3 Fuser unit 1. Unplug the 2 connector from Main PBA and SMPS board. 2. Release the Fuser unit after remove the 4 screws. Service Manual Samsung Electronics...

  • Page 47: Smps Board

    • Remove the SMPS board after remove the 7 screws and 2 harness. 3.2.5 Main PBA • Before Disassembling, Separate the SMPS cover. (Refer to 3.3 ) • Remove the Main PBA after remove the 3 screws and all harness. Service Manual Samsung Electronics...

  • Page 48: Drive Unit

    1. To remove the Drive assy, first remove the Main cover 3. Unplug the one harness. (refer to 3.3 ). And remove the 2 screws as shown below. 2. Remove the 6 screws and then release the Drive unit. Service Manual Samsung Electronics...

  • Page 49: Lsu

    • Before disassembling, Separate the Main cover. (Refer to 3.3) • Release the LSU after remove the 3 screws and 2 harness. 3.2.8 HVPS board 1. Remove the 5 screws. 2. Remove the 2 connector as shown below. Service Manual Samsung Electronics...

  • Page 50: Transfer Roller

    • Before disassembling, Separate the Main cover (refer to 3..3 ) and Fuser unit (refer to .3.4 ) • Remove the transfer roller by lift up the edge with any tool. 3.2.10 Pick up roller 1. Remove the hook of both side. And pull the pick-up roller to the direction of arrow. Service Manual Samsung Electronics...

  • Page 51: Alignment And Adjustments

    4.1.1.1 Printing a Demo Page Print a demo page or a configuration sheet to make sure that the printer is operating correctly. 1) Hold down the Cancel button for about 2 seconds to print a demo page. Service Manual Samsung Electronics...
  • Page 52 Alignment & Troubleshooting 2) The Demo page or the configuration sheet shows the printer’s current configuration. Service Manual Samsung Electronics...

  • Page 53: Control Panel

    Alignment & Troubleshooting 4.1.2 Control Panel 4.1.2.1 OP Panel Status LED Shows the status of your machine. Toner LED Shows the status of the toner cartridge. Cancel Stops an operation at any time and there are more functions. Service Manual Samsung Electronics...

  • Page 54: Understanding The Control Panel

    The machine is experiencing an error such as jammed paper. Toner LED STATUS DESCRIPTION The toner is exhausted, machine will stop printing. Replace the toner cartridge. Blinking The toner is low, replace the toner soon. Rapidly blinking The toner is empty, replace the toner. Service Manual Samsung Electronics...
  • Page 55 This may take some time depending on the size of the print job. In Manual Feed mode, you can't cancel the print job by pressing this button. Service Manual Samsung Electronics...

  • Page 56: Consumables And Replacement Parts

    Environmental conditions and actual use will vary these factors. The cycle period given below is for reference only. COMPONENT REPLACEMENT CYCLE Pick-up Roller 50,000 Pages Transfer Roller 50,000 Pages Fuser 50,000 Pages Toner Cartridge 1,500 Pages(Sales), 700 Pages(Initial) Service Manual Samsung Electronics...

  • Page 57: Periodic Defective Image

    Transfer Roller 46.2mm image ghost Heat Roller 63.9mm Black spot and image ghost Pressure Roller 75.4mm black spot on the backside BIN PATH Transfer Roller OPC Drum Heat Roller Charge Roller Pressure Roller Supply Roller Developing Roller Service Manual Samsung Electronics...

  • Page 58: How To Use Dcu

    4.1.5.1 DCU Setup You can examine the malfunction of the printer. To perform DCU, open the front discharge cover and leave the connect the harness wire(10 pin/4 pin) to the CN1(ML-1640/2240) of the Main control board. ML SERIES DIAGNOSTIC CONTROL UNIT...
  • Page 59 The front part of paper is jammed just after passing through the discharge sensor. Out Bin Full The Out bin is filled with paper. LSU Not Ready LSU Scanner Motor not ready or Hsync signal not output. Service Manual Samsung Electronics...
  • Page 60 [Up] button to Check LD. LD is functioning and the middle button is on. If the LD is normal, all LEDs are on. Pickup clutch on The Solenoid in the printer is in operation. To stop the operation, Press the button [shift] and [Enter] together. 4-10 Service Manual Samsung Electronics...
  • Page 61 Indicates the function of the Fan, same method of the code ‘07’. Manual Pickup Test : Indicates the function of th Manual Pickup, same method of the code ‘07’. Manual Sensor Test : Indicates the function of the Manual Sensor, same method of the code ‘07’. 4-11 Service Manual Samsung Electronics...
  • Page 62 READY Mode, and '88' shows in the DCU. In this mode, without any detection, the printer begins printing(trial printing and data from the PC). It is convenient to use this mode when the engine malfunction is detected in the control board. 4-12 Service Manual Samsung Electronics...

  • Page 63: Paper Path

    4) The paper passed the paper exit sensor moves out from the set. (Jam 2 occurs sometime after if the tailing edge of the paper is not coming out from the set after the leading edge of paper passes the paper exit sensor.) BIN PATH BIN PATH BIN PATH 4-13 Service Manual Samsung Electronics...

  • Page 64: Clearing Paper Jams

    When you pull the jammed paper, if there is resistance and the paper does not move immediately, stop pulling. Continue with the next step. 4-14 Service Manual Samsung Electronics...

  • Page 65: In The Paper Feed Area

    2. Open and close the front or top cover to resume visible edge from the tray. Make sure that all of the printing the document from failed pages. paper is properly aligned in the tray. 4-15 Service Manual Samsung Electronics...

  • Page 66: Around The Toner Cartridge

    2. Pull the toner cartridge out and remove it from the 4. Check that there is no other paper in the printer. machine. 5. Reinstall the toner cartridge, and then close the cover. Printing can be resumed. 4-16 Service Manual Samsung Electronics...

  • Page 67: Tips For Avoiding Paper Jams

    • Clean the inside of the printer • Adjust the print resolution from the printer properties • Ensure that the Toner Save mode is off • Clear general printing problems • Install a new toner cartridge, and check the print quality 4-17 Service Manual Samsung Electronics...

  • Page 68: Troubleshooting

    - No Power On-Line LED - Power Module error - Main PBA Indicate On-Line LED Refer to "Lamp toggle" Green OK? "Chapter 4.1.4" Print(test pattern) printing Refer to "Solution Quality is of Image Problem" Nomal? 4-18 Service Manual Samsung Electronics...

  • Page 69: Basic Check List

    --> Refer to section 4.2.5 (Page 6-17). 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 4-19 Service Manual Samsung Electronics...

  • Page 70: Initial Inspection

    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. 4-20 Service Manual Samsung Electronics...

  • Page 71: Bad Discharge

    Alignment & Troubleshooting 4.2.2 Bad discharge 1) Wrong Print Position • Description Printing begins at wrong position on the paper. Wrong sense time caused by Replace the defective actuator defective feed sensor actuator. 4-21 Service Manual Samsung Electronics...
  • Page 72 IPA(Isopropyl Alcohol) or roller-pickup for foreign matter. water. 4. If the paper feeds into the printer rand Replace the SMPS, HVPS or Jam 0 occurs, perform DCU to check Sensor. feed-sensor of the engine board. BIN PATH 4-22 Service Manual Samsung Electronics...
  • Page 73 2. If the recording paper is stuck in the discharge Reassemble the Actuator-Feed roller and the fuser just after passing and Spring-Actuator if the returning through the Actuator-Feed, Feed is bad. Actuator may be defective. BIN PATH 4-23 Service Manual Samsung Electronics...
  • Page 74 • Remove the toner particles stained on the rib. 3. Paper is accordion in the fuser. • Check the assemblage and performance of the exit. BIN PATH 4-24 Service Manual Samsung Electronics...
  • Page 75 Perform DCU Diagnostic Code 06. 2. Pad-Friction is Clean the pad friction with soft contaminated with foreign clothe dampened with IPA matter.(oil...) (Isopropyl Alcohol). Use the smooth paper. 3. The face of paper is blended. 4-25 Service Manual Samsung Electronics...
  • Page 76 2. The surface of the heat roller with IPA or water 3. Check the warp or separation of the sprint claw and the holder plate claw, and then manage it. 4-26 Service Manual Samsung Electronics...
  • Page 77 1. Paper is too much thin. How to remove the rolled in the OPC Drum. • Remove the paper while turning 2. The face of paper is curled. the OPC Drum against the ongoing direction. 4-27 Service Manual Samsung Electronics...

  • Page 78: Malfunction

    3. Check if the heat lamp mode works properly. works properly. Run DCU mode : Perform DCU 4. Check if the overheat diagnostic code 10. circuit works properly. 5. The fuser gear is defective Replace Fuser. due to melting away. 4-28 Service Manual Samsung Electronics...
  • Page 79 DCU Mode : Check if the Error States 1. Replace the Fuser. '60' '62' '68' occur. Check the operation 2. Replace the Main Control board. of Fuser Erasing Lamp On/Off with the Error Code Check -10-. 4-29 Service Manual Samsung Electronics...
  • Page 80 1. Bending or deformation of Replace the defective actuator. the actuator of the paper sensor. 2. The function of the engine board is defective Perform DCU mode : Replace the engine board. Perform DCU diagnostic code 8. 4-30 Service Manual Samsung Electronics...
  • Page 81 1. Bending or deformation of Replace the defective actuator. the actuator of the paper sensor. 2. The function of the engine board is defective Perform. DCU mode : Replace the engine board. Perform DCU diagnostic code 8. 4-31 Service Manual Samsung Electronics...
  • Page 82 Main Open S/W Connect. Control board. Perform DCU mode : 2. Replace the Main Control board If Error state '64' occurs, Check or Cover Open S/W. the related codes of the Cover Open Error. 4-32 Service Manual Samsung Electronics...
  • Page 83 Open S/W Connect. department in the Main Control board. 2. Replace the Main Control board Perform DCU mode : If Error state or Cover Open S/W. '64' occurs, Check the related codes of the Cover Open Error 4-33 Service Manual Samsung Electronics...
  • Page 84 Main motor is not driving when printing, and paper does not feed into the printer, resulting 'Jam 0'. Check the motor harness, replace 1. Motor harness or sub it, if defective. PCB may be defective. 2. Perform DCU diagnostic Replace the SMPS, if necessary. code 00 and Check the motor operation. 4-34 Service Manual Samsung Electronics...
  • Page 85 1. Check if the power input and SMPS. SMPS output are normal. 2. Check the inferiority of 1. Replace the control board. LED-Panel on the front-cover if the 2. Replace the LED-panel. LED of Panel does not appear after normal warming-up. 4-35 Service Manual Samsung Electronics...
  • Page 86 1. If the supply of +24v is unstable in the Main Control board 1. Replace LSU. linking with LSU, check drive by 2. Replace the Main Control board. DCU Mode : LSU Check -05- LSU Motor on. 4-36 Service Manual Samsung Electronics...

  • Page 87: Bad Software Environment

    4. Check if the printer If the scanner needs to be connected to the printer, cable is directly connected to first the remove the scanner from the PC to see if peripheral devices the printer is properly working alone. 4-37 Service Manual Samsung Electronics...
  • Page 88 If not solved, double-click the printer 4. Reboot the system to print. 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. 4-38 Service Manual Samsung Electronics...
  • Page 89 Delete the unnecessary files to secure enough job sometimes stops or due to insufficient space of the hard disk and start printing job again. virtual memory, but it actually comes from the insufficient space of the hard disk.) 4-39 Service Manual Samsung Electronics...
  • Page 90 After rebooting the computer, check for viruses, 5. When some files related restore the damaged files and reinstall the to OS are damaged or virus program to do the printing job. infected. Continue.. 4-40 Service Manual Samsung Electronics...
  • Page 91 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. 4-41 Service Manual Samsung Electronics...

  • Page 92: Bad Image

    2. Scratched surface of Replace the transfer roller if the charge roller in the toner cartridge. occurred as No. 3. 3. Partly depression or deformation on the surface of the transfer roller. 4-42 Service Manual Samsung Electronics...
  • Page 93 Remove if top of a black image. found. 5. It may occur when foreign If the problems are not solved, substances are on the OPC Drum. replace the toner cartridge. 4-43 Service Manual Samsung Electronics...
  • Page 94 Transfer Roller = 46.2mm Transfer Roller = 46.2mm ransfer Roller = 46.2mm Heat Roller = 63.9mm Heat Roller = 63.9mm Heat Roller = 63.9mm Pressure Roller = 75.4mm Pressure Roller = 75.4mm Pressure Roller = 75.4mm 4-44 Service Manual Samsung Electronics...
  • Page 95 5. Clean the inside of the set against the paper particles and foreign matter in order not to cause the trouble. 4-45 Service Manual Samsung Electronics...
  • Page 96 HVPS and the one in the set. 1. Clean up the contaminated area by the toner. 2. Replace the HVPS if the 4. Abnormal output from the HVPS. problems are not solved by the above four directions. 4-46 Service Manual Samsung Electronics...
  • Page 97 HVPS. side of the Developer and charge 2. Replace the HVPS if not solved terminal of HVPS. by the above direction 1 and 2. 4-47 Service Manual Samsung Electronics...
  • Page 98 Occur in the developer cartridge, 2. The toner level is not even on the developer roller due to replace the developer and try to the bad blade. print out. 4-48 Service Manual Samsung Electronics...
  • Page 99 Clean the bushing part of the 4. Is the movement(Up and Down) transfer roller. of the transfer roller smooth? If the problem is still not solved, 5. Is the HVPS normal? replace the developer. 4-49 Service Manual Samsung Electronics...
  • Page 100 If not solved by the direction 3, 4. Transfer roller lifetime check the transfer roller lifetime (50.000 sheets) has expired. and replace it. 5. Abnormal low temperature Wait about 1 hour after power on (below 10°C). before using printer. 4-50 Service Manual Samsung Electronics...
  • Page 101 Select 'Thick Mode' on paper type thicker than normal paper or menu from the software application transparencies such as OHP, higher and after using returning to the transfer voltage is original mode is recommended. required. 4-51 Service Manual Samsung Electronics...
  • Page 102 Check the approved voltage of the 2. The abnormal voltage and supply roller and contact of the bad contact of the terminal of the terminal and adjust if necessary. supply roller 4-52 Service Manual Samsung Electronics...
  • Page 103 Disassemble the fuser and remove the contaminated toner The temperature of the fuser is maintained high. particles on the roller and clean the foreign matter between Thermistor and Heat roller. ( Caution : can be deformed) 4-53 Service Manual Samsung Electronics...
  • Page 104 If the transfer roller is contaminated, run PC Cleaning Mode Print 2 or 3 2. If the transfer roller is times. contaminated, stains on the face of And perform Self-Test 2 or 3 times page will occur. to remove contamination. 4-54 Service Manual Samsung Electronics...
  • Page 105 2. Disassemble the fuser and clean 2. Pressure roller is contaminated. 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. 4-55 Service Manual Samsung Electronics...
  • Page 106 15) Blank Page Print out (1) • Description Blank page is printed. Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Remove contamination of the Bad ground contacts in terminals of the developer and OPC and/or developer. the unit. 4-56 Service Manual Samsung Electronics...
  • Page 107 DCU to check if the Solenoid is normal.(refer to code 06) 2. Abnormal solenoid. 2. If not solved by the above directions 1-2, Replace the engine board. 3. Turn the power off, delete the data of PC and try printing again. 4-57 Service Manual Samsung Electronics...

  • Page 108: Exploded Views And Parts List

    5-13 LASER PRINTER The keynote of Product - Speed ML-1640 : 16 ppm (A4), 17 ppm( Ltr) ML-2240 : 22ppm (A4), 23 ppm (Ltr) - Emulation : GDI - Processor : 150 Mhz Jupiter4e CPU - Memory : 8 MB - Toner cartridge : Initial (0.7K), Sales (1.5K)

  • Page 109: Main Assembly

    ExplodedView and Parts list 5.1 Main Assembly 2-10 15-1 15-2 Service Manual Samsung Electronics...
  • Page 110 Main Parts List *SA : SERVICE AVAILABLE, SNA : SERVICE not AVAILABLE *Grade : Parts Class”A,B,C,D,E” Drawer# SEC_CODE DESCRIPTION QT’Y Service Grade Remark 5.1-0 ML-2240 5.1-0 ML-1640 5.1-1 JC96-05123A ELA UNIT-FRAME 2240 5.1-1 JC96-05120A ELA UNIT-FRAME 1640 5.1-2 JC97-03181A MEA-COVER MAIN 1640 5.1-2...
  • Page 111 *SA : SERVICE AVAILABLE, SNA : SERVICE not AVAILABLE *Grade : Parts Class”A,B,C,D,E” Drawer# SEC_CODE DESCRIPTION QT’Y Service Grade Remark 5.1-7 JC96-05121A ELA HOU-FUSER 1640/110V 5.1-7 JC96-05122B ELA HOU-FUSER ML-1640/XIP 5.1-7 JC96-05124A ELA HOU-FUSER 2240/110V 5.1-7 JC96-05125A ELA HOU-FUSER 2240/220V 5.1-8 JC63-01930A SHIELD-ENGINE 5.1-9 JC39-00936A HARNESS-LSU 5.1-10...

  • Page 112: Frame Assembly(Ml-2240)

    ExplodedView and Parts list 5.2 Frame Assembly (ML-2240) Service Manual Samsung Electronics...
  • Page 113 JC70-00500C ADJUST-CASSETTE_R 5.2-8 JC70-00499C ADJUST-CASSETTE_L 5.2-9 JG66-40003A GEAR-PINION 5.2-10 JC61-00836A FOOT-FRONT 5.2-11 JC66-00807A GEAR-FUSER DR 63/35 5.2-12 JC66-00808A GEAR-FEED DR 41 5.2-13 JC66-00822A LEVER-M-ACTUATOR_EMPTY 5.2-14 JB61-00076A SPRING ETC-TORSION DOC (CC2-F) 5.2-15 JC63-00622A GROUND-P-OPC 5.2-16 6107-001503 SPRING-CS Service Manual Samsung Electronics...

  • Page 114: Frame Assembly(Ml-1640)

    ExplodedView and Parts list 5.3 Frame Assembly(ML-1640) Service Manual Samsung Electronics...
  • Page 115 ExplodedView and Parts list Frame Parts List(ML-1640) *SA : SERVICE AVAILABLE, SNA : SERVICE not AVAILABLE *Grade : Parts Class”A,B,C,D,E” Drawer# SEC_CODE DESCRIPTION QT’Y Service Grade Remark 5.3-0 JC96-05120A ELA UNIT-FRAME 5.3-1 JC61-01152A FRAME-M-BASE 5.3-2 JC97-02218A MEA UNIT-PLATE KNOCK_UP 5.3-2-1...

  • Page 116: Fuser Unit

    ExplodedView and Parts list 5.4 Fuser Unit Service Manual Samsung Electronics...
  • Page 117 *SA : SERVICE AVAILABLE, SNA : SERVICE not AVAILABLE *Grade : Parts Class”A,B,C,D,E” Drawer# SEC_CODE DESCRIPTION QT’Y Service Grade Remark 5.4-0 JC96-05121A ELA HOU-FUSER 1640/110V 5.4-0 JC96-05122A ELA HOU-FUSER ML-1640/XSA 5.4-0 JC96-05124A ELA HOU-FUSER 2240/110V 5.4-0 JC96-05125A ELA HOU-FUSER 2240/220V 5.4-1 JC61-01162A FRAME-P-FUSER 5.4-2 JC63-00615A COVER-M_FUSER 5.4-3...

  • Page 118: Paper Path Unit

    ExplodedView and Parts list 5.5 Paper Path Unit 11-3 11-2 11-1 5-11 Service Manual Samsung Electronics...
  • Page 119 JC66-00829A SHAFT-P-PICK_UP 5.5-21 JC61-01151A HOUSING-M-PICK_U 5.5-22 JC61-01173A HOUSING-M-PICK_UP B 5.5-23 JC73-00211A RUBBER-PICK_UP 5.5-24 JC66-01935A CAM-PICKUP L 5.5-25 JC66-01936A CAM-PICKUP R 5.5-26 JC66-00813A GEAR-TRANSFER 5.5-27 JC61-01281A BRACKET-P-BAR_PICK_UP 5.5-28 JC39-00482A CBF HARNESS-MICRO SW 5.5-29 JC61-01548A HOLDER-M-CAM 2240 5-12 Service Manual Samsung Electronics...

  • Page 120: Mp Tray Assembly (Only Ml-2240)

    ExplodedView and Parts list 5.6 MP Tray Assembly (Only ML-2240) 5-13 Service Manual Samsung Electronics...
  • Page 121 *SA : SERVICE AVAILABLE, SNA : SERVICE not AVAILABLE *Grade : Parts Class”A,B,C,D,E” Drawer# SEC_CODE DESCRIPTION QT’Y Service Grade Remark 5.6-0 JC97-02239G MEA UNIT-MP TRAY 5.6-1 JC61-01263F PLATE-MP 5.6-2 JC70-00514E ADJUST-MP L 5.6-3 JC70-00515E ADJUST-MP R 5.6-4 JG66-40003A GEAR-PINION 5.6-5 JC63-00711A SHEET-MP 5-14 Service Manual Samsung Electronics...

  • Page 122: System Diagram

    DGND DGND 24VS2 24VS2 nCRU_DET 24VS2 24VS2 Ready/Error Toner 24VS1 24VS1 MICRO S/W 24VS1 24VS1 HVPS 3.3V HYPER_TXD HYPER_RXD 24VS1 24VS2 DGND HYPER Peacock Hardware Team DEVE SMPS_FAN Digital Priting Div. Samsung Electronics THERMISTOR CRUM Jan.21.2008 Service Manual Samsung Electronics...

  • Page 123: Reference Information

    • Cotton Swab Standard : Test equipment to diagnose the Laser Standard : For general home use, for medical service. printer supplied by Samsung Electronics. • Cleaning Equipments Standard : An IPA(Isopropyl Alcohol)dry wipe tissue or a gentle neutral detergent and lint-free cloth.

  • Page 124: Acronyms And Abbreviations

    Host Based Printing Hard Disk Drive High temperature and high marshy place high voltage HVPS High Voltage Power Supply interface Input and Output integrated circuit Intelligent Drive electronics or Imbedded Drive Electronics Service Manual Samsung Electronics...
  • Page 125 Quick Printer Initiating Device Q ty quantity Random Access Memory Read Only Memory Second Cassette Feeder SMPS Switching Mode Power Supply SPGP Samsung Printer Graphic Processor Samsung Printer Language Spool Simultaneous Peripheral Operation Online switch sync synchronous or synchronization Universal Serial Bus WECA...

  • Page 126: Selecting Printer Locations

    • 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 Samsung Electronics...

  • Page 127: Sample Tests Patterns

    The life of the toner cartridge, developer cartridge and printing speed are measured with the pattern shown below (5%). The A4 ISO 19752 standard pattern samples are reproduced reduced to 70% of the actual A4 size. A4 ISO 19752 Standard Patterns Service Manual Samsung Electronics...

  • Page 128: Parts Life Cycle Maintenance Table

    - Clean up OPC (10 times) and inside of machine with cloth, if disappeared, no failure. Image Fainted After shake cartridge right and left 5~6 times, if printing image is not fainted, no failure. (Toner Exhausted) Vertical Black Line Vertical thin line emerge, if cartridge is scratched. - (Customer fault) Service Manual Samsung Electronics...

  • Page 129: Model Information

    Distribution (Valuable model excepted) description, - C&C : Engine speed is decided product - Information : The first byproduct conception number deleted planning group to product with sales planning prospect) group responsed Description Alphabet Digit Alphabet Service Manual Samsung Electronics...

  • Page 130: Understanding Material Code & Name

    ELA UNIT-COVER TOP Type 1 : Parts managed by entire divisions : Materials used by all samsung products. Most electrical parts are under the type 1. Type 2 : Parts managed by a division : Material used by a certain product Most mechanical parts are under type 2.

This manual is also suitable for:

Ml-1645Ml-2240

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