DIGITAL LASER MFP SCX-5312F SCX-5112 SERVICE MANUAL CONTENTS DIGITAL LASER MFP 1. Precautions 2. Specifications 3. Disassembly 4. Troubleshooting 5. Exploded Views and Parts List 6. Block Diagram 7.
Precautions 1. Precautions Follow these safety, ESD, and servicing precautions to prevent personal injury and equipment damage. 1-1 Safety Precautions 1. Be sure that all built-in protective devices are in place. Restore any missing protective shields. 2. Make sure there are no cabinet openings through which people-particularly children- might insert fingers or objects and contact dangerous voltages. 3.
Precautions 1-3 ESD Precautions 1. Certain semiconductor devices can be easily damaged by static electricity. Such components are commonly called “Electrostatically Sensitive (ES) Devices”, or ESDs. Examples of typical ESDs are: integrated circuits, some field effect transistors, and semiconductor “chip” components. 4. Use only a grounded tip soldering iron to solder or desolder ESDs. Use only an “anti-static” solder removal device.
Precautions 1-5 Tools for Troubleshooting The following tools are recommended for safe and smooth troubleshooting described in this service manual. 1 DVM(Digital Volt Meter) 3 Driver Standard: Indicates more than 3 digits. Standard: "-" type, "+" type (M3 long, M3 short, M2 long, M2 short). 4 Pinset Standard: For general home use, small type. 2 Electronic Scale 5 Cotton Swab Standard: Equipment to check the weight of consumables(toner cartridge) supplied by Samsung Electronics.
Specification 2. Specification Specifications are correct at the time of printing. Product specifications are subject to change without notice. See below for product specifications.
Specification 2-2 Printer Specifications Item Description Printing Method Laser Scanning Unit + Electro Photography Speed Single Side : 12 PPM (Letter Size, 5% Character Pattern) Duplex : 7.
Specification 2-4 Scanner Specification Item Description Type Flatbed(with ADF) Speed Mono : 1.25 msec/line, Color : 5 msec/line Device Color CCD(Charge Coupled Device) Module Interface IEEE1284(ECP Support) USB(without HUB Mode) Compatibility TWAIN Standard , WIA Optical Resolution(H X V) 600 X 600 dpi Interpolation Resolution Max. 4800 dpi Halftone 256 Levels Effective Scan width 8.
Specification 2-6 Telephone Specification(SCX-5312F Only) Item Description 1Touch Dial 40EA(1~20 , shift key + 21~40) Speed Dial 80EA Tone/Pulse Tone only user modeTone/Pulse selectable in tech mode.
Disassembly and Reassembly 3. Disassembly and Reassembly 3-1 General Precautions on Disassembly When you disassemble and reassemble components, you must use extreme caution. The close proximity of cables to moving parts makes proper routing a must. If components are removed, any cables disturbed by the procedure must be restored as close as possible to their original positions. Before removing any component from the machine, note the cable routing that will be affected.
Disassembly and Reassembly 3-3 Scanner Ass'y 1. Before you remove the Scanner Ass'y, you should remove: - Rear Cover (see page 3-1) 4. Open the Side Cover assembly first to open the Front cover. In the other words, close the front cover first to assembly it. . 2. Remove the six screws and take out the Shield Main Upper.Unplug the one connector and CCD cable.
Disassembly and Reassembly 6. Pull up the Scanner Ass'y in the direction of arrow. 9. Remove the three screws securing the Platen Ass'y. 7. Remove the connector from the Platen Ass'y. 10. Pull the OPE Ass'y and unplug the one connector. 8. Open the ADF Ass’y in the direction of arrow. Pull the ADF Ass'y upward and remove it. 11. Remove the five screws securing the Platen Ass'y.
Disassembly and Reassembly 12. Unlatch the Scan Upper Ass'y securing the glass and remove it. 14. Remove the four screws and Channel Base Frame. Channel Base Frame Notice : When foreign material enters into the Scan Assy, it may cause problems in product performance and deteriorate scan image. Therefore, you should always dismantle or assemble it at a clean place. 13. Remove the two scews and pull the Dummy Upper Ass’y. 15. Remove the five screws and Dummy ScanLower.
Disassembly and Reassembly 16. Remove the CCD cable. 18. Remove three screws and take out the Motor Bracket. 17. Pull up the Shaft CCD and take out the Scanner Module. 19. Remove the OPE Harness from the Platen PBA. Remove two screws and take out the Platen PBA.
Disassembly and Reassembly 3-4 ADF Ass'y 1. Before you remove the ADF Ass'y, you should remove: - Rear Cover (see page 3-1) - Scanner Ass'y (see page 3-2) 4. Pull the ADF Ass'y upward and remove it. 2. Remove the five screws from the Platen Cover. Platen Cover Ass’y Platen Cover Ass’y 3. Open the Cover open and pull the Cover Side L and Cover Side R and unlatch the Side Cover L by pushing the part hooked the Platen Cover using a sharp tool. 5. Tack out he Open Cover.
Disassembly and Reassembly 6. Take out the Pick-up Ass’y. Remove the four screws and the ADF Upper. 7. Remove three screws and take out the ADF Motor ass'y.
Disassembly and Reassembly 3-5 OPE Ass'y 1. Before you remove the OPE Ass'y, you should remove: - Rear Cover (see page 3-1) - Scanner Ass'y (see page 3-2) 4. Remove the key pad from the unit. 2. Remove ten screws securing the OPE PBA and the LCD Module from the OPE Cover. Caution The above information is for the SCX-5312 model. For the SCX-5112 model, “A” parts is eliminated. 3. Remove the contact rubbers from the unit.
Disassembly and Reassembly 3-6 Side Cover Ass'y 1. Remove the two screws to release the Stopper(Main Frame side) securing the Side Cover to the Main Frame. * MP-Tray 1. Pull the both side of the part to dissemble it. 1 1 2. Completely open the Side Cover Ass’y, and after pull the part to the arrow direction (to the top), pull the part to the arrow direction (inner side). 2. As the part, make the Tray-Case and the Tray-Link in rectangular position to dissemble the Tray-Case from the Tray Link.
Disassembly and Reassembly * Duplex Ass’y * Transfer Roller Ass’y 1. Unite the part and home to the projection part of the Side Cover assembly, and widen them from each other to dissemble the Side Cover Ass’y. 1. Take out the Transfer Roller, as shown below.
Disassembly and Reassembly 3-7 Fuser Ass'y 1. Before you remove the Fuser Ass'y, you should be power off and remove: - Side Cover Ass'y (see page 3-9) 2. Remove the one screw and take out the Cover Sheet Connector. 6. Remove the two screws and take out the Halogen Lamp. Halogen Lamp 5. Remove the four screws and take out the Thermostat. Thermostat 3. Unplug the one connector. 7. After remove the two screw and open the Lower Ass’y froward tack out the Heat Roller Ass’y from Upper Fuser Ass’y. 4.
Disassembly and Reassembly 3-8 Exit Ass'y 1. Before you remove Exit Ass'y, you should remove: - Rear Cover (see page 3-1) - Scanner Ass'y (see page 3-2) 3. Pull the exit ass’y and remove it. 2. Remove four screws, and then untile the harness from the Exit Upper. Unplug four connectors and unlatch the Dummy Base Frame, as shown below. 3-9 Cover Paper Exit Ass'y 1. Before you remove the Cover Paper Exit Ass'y, you should remove: - Rear Cover (see page 3-1) - Scanner Ass'y (see page3-2) 2.
Disassembly and Reassembly 3-10 Drive Ass'y 1. Before you remove the Drive Ass'y, you should remove: - Rear Cover (see page 3-1) - Shield Main Upper (see page 3-2) 3. Remove the one screw and take out the Fan and Dust Fan. 2. Unplug the two connectors. (Main Motor:9pin, Duplex Solenoid : 2pin) Fan Dust Fan 4. Remove the five screws and take out the Drive Ass'y.
Disassembly and Reassembly 3-11 SMPS 1. Before you remove the LSU, you should remove: - Rear Cover (see page 3-1) - Scanner Ass'y (see page 3-2) - Cover Paper Exit Ass’y(see page 3-12) 3. Unplug the all connectors. 2. Remove three screws and take out the Shield SMPS Upper. 4. Remove the SMPS, as shown below.
Disassembly and Reassembly 3-12 LSU (Laser Scaning Unit) 1. Before you remove the LSU, you should remove: - Rear Cover (see page 3-1) - Scanner Ass'y (see page 3-2) - Cover Paper Exit Ass’y (see page 3-12) 3. Remove the three screws and take out the LSU. LSU 2. Unplug the two connectors.
Troubleshooting 4. Maintenance & Troubleshooting In this chapter, it was mentioned about the functions for maintaining the product, how to find the causes of the inferiority, and troubleshooting method. The service manual is bound the SCX-5312F and SCW-5112 together in one volume. The SCX-5312F has functions such as printer, copy, scanner, and fax. The SCX-5112 has all functions as the SCX-5312F but the fax function. The contents of the manual are standardized for the SCX-5312F.
Troubleshooting 4-2 Error Messages Error Message Description Solution RETRY REDIAL? The machine is waiting for the programmed interval to automatically redial. You can press START to immediately redial, or STOP to cancel the redial operation. COMM. ERROR A problem with the facsimile communications has occurred. Try again. DOCUMENT JAM Loaded document has Jammed in the feeder When Document Jam aeeurred at ADF module Clear the document Jam. DOOR OPEN The side cover is not securely latched.
Troubleshooting Error Message Description Solution NO CARTRIDGE When the machine detected the toner cartridge has not been installed. Install the Cartridge. BYPASS JAM When the machine detected the non-feeding from BYPASS Tray. Open the side Cover and clear the jam. DUPLEX JAM When the machine detected the duplex jam in the middle of machine. Clear the jam. LINE BUSY The remote FAX didn’t answer Try again.
Troubleshooting 4-3 User Mode The table in the bellow explains the possible setting functions by user. The details about the ways to use are explained in the user manual. In the service manual, the items are about the possible set-up by user. 4-3-1 SCX-5312F Function SYSTEM DATA SYSTEM ID Item Content CASSETTE PAPER LETTER / A4 / LEGAL BYPASS PAPER LETTER / A4 / LEGAL MESSAGE CONF.
Troubleshooting Function Item Content TX CONFIRM SCHEDULE JOB PHONE BOOK SYSTEM LIST TX JOURNAL RX JOURNAL HELP LIST HELP LIST 4-3-2 SCX-5112 Function SYSTEM DATA Item Content CASSETTE PAPER LETTER / A4 / LEGAL BYPASS PAPER LETTER / A4 / LEGAL POWER SAVE ON / OFF SELECT LANGUAGE ENG/GER/FRE/ITA/SPA/POR/DUT USB MODE FAST / SLOW HELP LIST HELP LIST PRINTOUT MAINTENANCE CLEAN DRUM NEW DRUM REPORTS SYSTEM DATA HELP LIST HELP LIST 4-4 Tech Mode 4-4-1 How to Enter Service Mode In servic
Troubleshooting 4-4-2 Setting-up System in Tech Mode 4-4-2-1 SCX-5312F(SETUP : #, 1, 9, 3, 4) Function SYSTEM DATA Item DIAL MODE Content TONE / PULSE MODEM SPEED ERROR RATE 5% /10% SET TX LEVEL 09-15 SILENCE TIME 12 / NU / OFF SYSTEM ID The same as User Mode DATE & TIME The same as User Mode SYSTEM SETUP The same as User Mode MEMORY CLEAR CLEAR ALL MEMORY DELAY TX The same as User Mode MEMORY TX The same as User Mode PRIORITY TX The same as User Mode POLLING The same as User Mode
Troubleshooting Function REPORTS Item Content MSG.
Troubleshooting 4-4-3 SYSTEM DATA DIALING MODE Select the dialing mode according to the user's line status. TONE: Electrical type of dial PULSE: Mechanical type of dial SILENCE TIME In ANS/FAX mode, after a call is picked up by the answering machine, the machine monitors the line. If a period of silence is detected on the line at any time, the call will be treated as a fax message and the machine begins receiving. Silence detection time is selectable between limited (about 12 seconds) and unlimited time.
Troubleshooting 4-4-5 MAINTENANCE CLEAN DRUM Use this feature to get rid of the toner remained in the development unit, so you can get a clean printout. Perform this feature if stains or specks appear on the printing materials and print quality falls. Perform this feature several times until a clean printing material appears. The machine automatically pulls in a sheet of paper,and prints out.The toner particles on the OPC drum surface is fixed to the paper.
Troubleshooting CLEAR COUNT This function erases information of history such as replacement times of Developing part and OPC drum, total printing pages, scan times, and etc. - The items are in the below section of the System Data List, printed at TECH MODE. - PASSWOEED: 1934 - Current Drum Page Count cannot be erased.
Troubleshooting NOTIFY TONER LOW With this feature enabled, when the toner becomes low, the toner low information will be sent to ta specified contact point, for example, the service company. After you access this menu, select ON, and when the LCD prompts, enter the name and the number of the contact point, the customer's fax number, the model name, and the serial number. PROGRAM DIAL It is a function setting transmitting conditions to transmit to specific address preliminary.
Troubleshooting RECEPTION This journal shows a specific information concerning reception activities, the time and dates of up to 40 of the most recent receptions. TRANSMISSION This journal shows a specific information concerning transmission activities, the time and dates of up to 40 of the most recent transmissions. SYSTEM DATA This list provides a list of the user system data settings and tech mode settings. PHONEBOOK It lists all telephone numbers that have been stored in the machine.
Troubleshooting DOS Command mode This method is just for Parallel Port. Connect to PC with Parallel cable and enter DOS Command to upgrade the Firmware. < Method > a). The first of all, need the files : down.bat, down_com.bin, fprt.exe, and Rom File: file name for upgrade.Save the files in the same folder. b). In the DOS, input as below and push the enter key. Then, it will be automatically upgraded. c) There are two commands for the conditions of product.
Troubleshooting 4-5 ENGINE TEST MODE The Engine Tests Mode supplies useful functions to check conducting condition of engine. It tests the conducting condition of each device and displays the result of the test at the LCD. It is classified in 6. items (0~5), and the functions of items are as bellows. 4-5-1 To enter the Engine Test Mode Press MENU, #, 1, 9, 3, 1 in sequence, and the LCD briefly displays ‘T’, the machine has entered service (tech) mode. 4-5-2 Diagnostic Remark No . Sub No .
Troubleshooting It is needed in the development progress. Service person doesn't need to use it. 4-6 Troubleshooting 4-6-1 Scanner 4-6-1-1 COPY PROBLEM White copy Black copy Defective image quality Abnormal noise Samsung Electronics ITEMS TO BE CHECKED. HOW TO SOLVE • Check the Scan-Cover open. • Room light can transit a thin original. • Check shading profile. • Remake shading profile in the tech mode. • Check white/black reference voltage in Main PBA. • Replace U16 if it is defective.
Troubleshooting 4-6-1-2 PC-Scan PROBLEM Scanning Error Defective image Quality Abnormal noise 4-16 ITEMS TO BE CHECKED. HOW TO SOLVE • Check the printer cable installed. • Check correct installation, and use standard IEEE1284 cable. • Check how TWAIN driver is installed. • Remove any other scanner driver. • Reboot after reinstallation of the TWAIN driver. • Check the printer port(Parallel). • Check the parallel-port-related items in the CMOS Setup.
Troubleshooting 4-6-2 FAX(only SCX-5312F) 4-6-2-1 FAX/TELEPHONE Precautions PROBLEM TEL LINE CANNOT BE ENGAGED (NO DIAL TONE) ITEMS TO BE CHECKED. • When you press “ OHD” key: a) Check line cord connection. b) Check MAIN LIU harness, and CN1 (LIU PBA). c )Check relay operation of LIU PBA : Is the control signal of CN20-7(main) low? HOW TO SOLVE a) insert it correctly into the connection jack called “line”. b) Replace defective parts. c) Replace main PBA IF the control signal of CN20-7(main) is high.
Troubleshooting 4-6-3 Print Quality Error Status Vertical black line and band Check Solution 1. Bad blade of Toner cartridge 2. LSU 1. Change Toner cartridge 2. Replace LSU 1. LSU window contamination 2. Toner cartridge 1. Clean LSU window 2. If not LSU, change Toner cartridge. 1. Seal tape is removed? 2. GND OPC is well grounded? 1. Removing seal tipe 2. Measure the resistance between frame ground and the ground spring attached frame. Confirm stable ground.
Troubleshooting Error Status Background Check Solution 1. High voltage output is normal? 2. C/R of Toner cartridge is contaminated? 1. Adjust to the rated status. 2. Replace Toner cartridge. 1. High voltage output. 2. Pre-Transfer Lamp. 3. Bad high voltage contact. 1. Check every high voltage. 2. Check the turn-on PTL, LED crash. 3. Clean the inside machine or replace toner cartridge. 1. Contamination of transfer roller. 1. Clean the transfer roller with vaccum cleaner. 2.
Troubleshooting Error Status Partial blank image (periodic) Different image density (left and right) Horizonral band Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Check Solution 1. Develope roller scar or particle. 2. Scar or particle. (94 mm) 3. Transfer roller scar or particle . (47 mm) 1~2. Replace toner cartridge. 1. Charge roller’s pressure force unbalance 2. Dev. roller and OPC or Dev. roller and blade’s pressure force unbalance 3.
Troubleshooting No Image Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer No image? A on next page NO YES Self test pattern prints? YES Check connection to computer or replace controller NO Self testing is possible ? NO Retest after replacing the connector or controller board YES Take out the cartridge and prepare the tester for electronic connection Is the OPC terminal of machine is well-connected to Frame? NO Repair or replace the GND terminal YES Does the v
Troubleshooting A Transfer voltage OK? (on the transfer roller shaft) NO YES Are the connection terminal and connection correct? NO Repair or replace terminal YES Replace HVPS or repair defective component Developing (-300V) and supplying (-450V) voltage are OK? NO Is the connection terminal OK? NO Repair or replace terminal YES YES Replace HVPS or repair defective component Does the counter indicate over the toner's guaranty life YES NO Transfer roller might be out of its location -> Locat
Troubleshooting All Black Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer All black in printing area? NO YES Does the video data line to LSU transit to High/Low when printing? NO YES Check the path among video controller, engine board, HVPS, LSU for the shortage or open -> Repair or replace the boards Replace LSU Is charge voltage supplied from HVPS? NO Repair or replace HVPS YES Is the Hsync/ signal received in LSU? NO Replace LSU YES Charge part's contact
Troubleshooting Vertical White Line (Band) Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer White line missing definitely? YES Dirt of dust stuck onto the window of internal lens of LSU -> Clean it or replace LSU Preventive obstacles through the path between OPC of developer and LSU prevent the path -> Remove the obstacles 4-24 NO Check if the printout is still has the same problem even right after passed through the transfer roller NO YES The ribs in fuser or toner
Troubleshooting Dark Image Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer NO Dark selected via RCP? YES Change to Normal and test NO Same at Normal? END YES Works cor with -300V of Bias voltage? NO Repair or replace the defective component YES Works correctly after replaced LSU? NO Toner over supply due to the adjustment fault of metering blade in developer -> Replace developer YES The power of LSU is set high or internal problem -> Replace LSU or adjust volu
Troubleshooting Background Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Recommended paper used? NO Print 20 to 30 pages using the recommended paper YES - Adjust voltage or replace HVPS - Repair or replace after checking the terminals' contacts NO Transfer, charge and developing voltage are OK? YES Same problem occurs? NO END NO Replace the toner cartridge YES Operating/ storage atmosphere is too high temperature /humidity? YES Solve the problem under the r
Troubleshooting Ghost Digital Digital Printer Printer Digital Digital Printer Printer Digital Digital Printer Printer Is it regular interval of 95mm? NO YES Replace PTL assembly NO Is it regular interval of 45mm? Is it regular interval of 58mm? (as transfer roller interval) NO YES YES A specific part of the transfer roller has ruined or its resistance value is changed -> Replace transfer roller PTL lamp works OK? YES Transfer roller cannot force regularly due to the gears eccentricity of tran
Troubleshooting Black Spot Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Is it regular interval of 38mm? NO YES The problem occured since the obstacles stuck to charge roller -> Clean the Charge Roller and then reprint.
Troubleshooting Horizontal Band Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Black band? NO Black band is far about 95mm from white band? NO YES The OPC is damaged under the direct sunlight for around 5 minutes -> If the same problem persists in 10 hours, replace the developer Problem of internal contacts in OPC -> Replace developer The black band has regular interval? NO This occur
Troubleshooting Irregular Density OK after taking out and rocking the toner cartridge? YES NO When gray pattern printing, irregular density persists? NO YES transfer/ charge/developing voltage drops while printing? NO YES Defective agitator in the toner supplying part of developer ->Replace the developer Check if the 'guide deve spring' works OK and repair/repalce Check high voltage output and repair/ replace terminals, HVPS It is over the guaranty life of toner cartridge (Check the counter and
Troubleshooting White Spot Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Is it regular interval of 95mm? YES Obstacles stuck on OPC's surface -> Clean the OPC and machine or replace developer NO Transfer voltage is normal? NO Too high voltage supplied due to the setting error of transfer voltage -> Adjust/replace HVPS YES D/R in developing unit has the defect -> Replace the developer When putting in/out the developer, scratch is made -> Replace the developer Sams
Troubleshooting Trembling at the End When OHP Printing Recommended OHP film used? NO Use the recommended film YES Inserted over than 10 films into the MPF? YES When multi-page OHP printng, less than 10 films are guranteed.
Troubleshooting Poor Fusing Grade After printing NO completed, any error related fuser? YES Both ends of thermostat open? The machine placed under the severe low tempera ture for a long time? YES NO NO While printing, the voltage of pin 60 of U36 (CPU) on Main PBA is 2.1V - 2.6V? NO Thermistor's contact is OK? NO YES YES Re-assemble thermistor Place the machine at normal temperature and re-test YES Replace thermostat and re-test Open the top cover.
Troubleshooting 4-6-4 Malfunction Error Status No power Check 1. Check power is supplying 2. Check fuse F1 open Fuser Error 1. Thermostat open Solution 1. If supplying power differs from machine’s power rating, replace the machine. 2. Replace it. 2. AC wire open 3. Thermistor wire open 4. Main PBA 1. Detach AC connector and measure the resistane between pin 1 and 2. If it is megohm, thermostat is open, Replace it. 2. Check bad connector contact or wire is cut. 3.
Troubleshooting Error Status Check Solution Jam 2 at face-down tray 1. Then paper is not drawn in because of the stack of papers in the Out tray. 2. Does it curl while coming out? 1. Load recommended quantity of papers Clutch error 1. Check the spring of solenoid 2. Check the armature assembly/cushion 1. Check whether the spring is expanded or not. 2. Check armature is well installed. It may be unstable assemble. 3. Remove the Main PBA. 3. Electrical check High voltage error 1.
Troubleshooting No Power (LCD NO display LED Off) Plug in the power cord? NO Check the voltage first and plug the power cord YES The power NO voltage supplying is the same as rating? Supply the power as the rating YES The fan revolves when powered on? Connections NO on board are OK? NO YES YES LEDs blink once when powered on? NO Fuse of SMPS if open? YES Repair/replace the board 4-36 NO Replace the fuse YES YES Shortage on the OPE panel board? Re-connect firmly and re-test NO The
Troubleshooting Fuser Error Measure the resistance at the both ends of AC Line with covers open NO Less than 10W? Thermostat is open due to the heat etc. -> Replace the thermostat YES Remove the covers AC is being supplied? NO Re-assemble the top cover and close it The voltage of pin #6 of U5 on the Main PBA is about 3.2V? If not check the CN4 on the power board. YES The voltage of pin #60 of U36 (CPU) on the Main PBA is about 2.
Troubleshooting Paper Jam (Mis-Feeding) Sounds the solenoid on when starts print? NO The solenoid defected -> Replace it YES Does the paper move? The Main PBA board defected -> Replace boards NO The pick-up unit is assembled wrong -> Re-assemble or replace the unit YES Does the paper move more than NO 100mm? Too many papers in the feeder? YES Feeder sensor is assembled reverse? YES NO The sensor and Main PBA defected -> Repair/replace Reduce the amount and re-test YES Switch them Paper
Troubleshooting Paper Jam(Jam 1) Paper NO stopped before the OPC? Paper NO stopped before the fuser? YES YES The actuator of NO paper exit sensor works OK? Check the actuator exists and its operation and around the Main PBA -> Replace YES Check the LSU and if it has the defect replace it Is the paper rolled around the presseure roller? Feeds NO multiple pages? NO YES YES Remove the fuser, remove the paper and replace the pressure roller, if necessary Severe skew when feeding? NO YES Adjus
Troubleshooting Engine Error Check CBF Harness-CN7 (Main B'D to LSU) NO Try again to connector or Replace connector YES Check Main B'D CN7-9, P_MOTOR Signal ( ) NO Replace Main PBA YES Check Main B'D CN7-8, LREADY Signal ( ) NO Replace LSU YES Check Main B'D CN7-4, LDON Signal ( ) NO Replace Main PBA YES Check Main B'D CN7-1, HSYNC Signal ( ) NO Replace LSU YES END 4-40 Samsung Electronics
Troubleshooting 4-6-5 Toner Cartridge and Drum Cartridge Service It is not guaranteed for the default caused by using other toner and Drum Cartridge cartridge other than the cartridge supplied by the Samsung Electronic or caused by non-licensed refill production. Precautions on Safe-keeping of the Drum Cartridge Excessive exposure to direct light more than a few minutes may cause damage to the cartridge.
Troubleshooting 4-6-5-1 Signs and Measures at Poor toner cartridge Fault Light image and partially blank image (The life is ended.) Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Toner Contamination Signs • The printed image is light or unclean and untidy. • Some part of the image is not printed. • Periodically a noise as "tick tick" occurs. • Toner is fallen on the papers periodically. • Contaminated with toner on prints partly or over the whole surface.
Troubleshooting Fault White Black spot Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Signs • Light or dark black dots on the image occur periodically. • White spots occur in the image periodically. Cause & Check 1. If light or dark periodical black dots occur, this is because the developer rollers are contaminated with foreign substance or paper particles. (1)37.7mm interval : Charged roller (2)94.3mm interval : OPC cycle 1.
Troubleshooting Fault Ghost & Image Contamination Signs • The printed image is too light or dark, or partially contaminated black. • Totally contaminatedblack. (Black image printed out) 4-44 Cause & Check Solution 1. The printed image is too light or dark, or partially contaminated black. (1)Check whether foreign sub stance or toner are stuck to the terminal(point of contact) of the developer. (2)Check whether the terminal assembly is normal. 1.
Troubleshooting 4-6-6 The cause and solutions of bad environment of the software 4-6-6-1 The printer is not working (1) • Description : While Power turned on, the printer is not working in the printing mode. Check and Cause Solution 1. Check if the PC and the printer is properly connected and the toner cartridge installed. 1. Replace the printer cable. If the problems not solved even after the cable replaced, check the amount of the remaining tone. 2. Printing is nor working in the Windows. 2.
Troubleshooting 4-6-6-3 Abnormal Printing • Description : The printing is not working properly even when the cable has no problem. (even after the cable is replaced) If the printer won't work at all or the strange fonts are repeated, the printer driver may be defective or wrong setup in the CMOS Setup. Check and Cause Solution 1. Set up the parallel port in the CMOS SETUP. 1. Select SPP(Normal) or ECP LPT Port the among ECP, EPP or SPP in the CMOS Setup. 2. Printer Driver Error. 2.
Exploded Views and Parts List Appendix information The following list shows different materials by model. The material codes mentioned in themanual are subject to change without prior notice. For the latest exact information, see ITSELF SYSTEM. (http://itself.sec.samsung.co.kr) •SCX-5312F/XAA •SCX-5112/XAA DESCRIPTION SEC.
Exploded Views and Parts List •SCX-5312F/XEC •SCX-5112/XEC DESCRIPTION SEC.CODE AS-SCANNER ASS’Y(FRU) AS-PLATEN ASS’Y(FRU) AS-OPE COVER ASS’Y(FRU) PMO-COVER OPE(C) PCT-ONETOUCH PAPER PCT-LCD WINDOW PMO-COVER DUMMY OPE(M) PBA SUB-LIU JC81-00691E JC81-00690C JC81-00689C JC72-00796E JC72-00872E JC72-00870E JC72-00858E JC92-01355E •SCX-5312F/XET SEC.
Exploded Views and Parts List 5. Exploded View & Parts List 5-1. Main Exploded View & Parts List....................................... 5-2. Platen Ass’y Exploded View & Parts List.................... 5-3. ADF ASS’Y Exploded View & Parts List...................... 5-4. Side Cover Ass’y Exploded View & Parts List........... 5-5. Cassette Ass’y Exploded View & Parts List............... 5-6. Exit Ass’y Exploded View & Parts List................................ 5-7. Feeder Ass’y Exploded View & Parts List.....
5-2 2-2 2-1 2 1-5 1-6 1-6 1-3 20 1-4 1-2 25 SCX-5112 SCX-5312F 1-1 39 1 3 28 47 34 4 6 5 12 7 46 35 45 26 8 26-1 43 15 9 49 26-3 24 13 44 16 26-2 26-3 48 17 37 21-1 38 50 53 53-2 53-153-3 11 30 37 14 21-2 23 51 33 21 19 10 52 52-4 52-3 52-2 52-1 29 42 41 18 27 18-2 40 36 18-1 Exploded Views and Parts List 5-1.
Exploded Views and Parts List Main Parts List ( SA.
Exploded Views and Parts List Main Parts List (Cont.) ( SA.
Exploded Views and Parts List 5-2.
Exploded Views and Parts List 3-5 3-21 3-15 3-4 3-3 3-3 3-2 3-2 3-6 3-1 3-1 3-7 3-8 3-10 3-4 3-12 3-5 3-13 3-15 3-16 3-9 3-6 3-7 3-12 3-14 3-8 3-11 3-11 3-17 3-18 3-10 3-9 3-19 3-20 S6 3-14 S6 S9 S9 S6 SCX-5312F 5-6 3-13 S6 S6 S6 SCX-5112 Samsung Electronics
Exploded Views and Parts List Platen Ass’y Parts List ( SA.
Exploded Views and Parts List SCX-5312F (OPE) NO 3 DESCRIPTION ELA HOU-OPE COVER ASS’Y SEC CODE Q’TY SA refer to the table 1 O 3-1 PMO-COVER OPE(C) refer to the table 1 O 3-2 PCT-LCD WINDOW refer to the table 1 O 3-3 PMO-COVER DUMMY OPE(M) refer to the table 1 O 3-4 PCT-ONETOUCH PAPER refer to the table 1 O 3-5 PCT-ONETOUCH CARD JC72-00871A 1 O 3-6 PMO-KEY ONETOUCH JC72-00860A 1 O 3-7 PMO-KEY SHIFT JC72-00861A 1 O 3-8 PMO-KEY FAX JC72-00862A 1 O 3-9 RMO-RUBB
Exploded Views and Parts List 5-3.
Exploded Views and Parts List ADF Ass’y Parts List ( SA.
Exploded Views and Parts List ADF Ass’y Parts List (Cont.) ( SA.
Exploded Views and Parts List 5-4.
Exploded Views and Parts List Side Cover Ass’y Parts List ( SA.
Exploded Views and Parts List 5-5.
Exploded Views and Parts List Cassette Ass’y Parts List ( SA.
Exploded Views and Parts List 5-6.
Exploded Views and Parts List Exit Ass’y Parts List ( SA.
Exploded Views and Parts List 5-7.
Exploded Views and Parts List Feeder Ass’y Parts List ( SA.
Exploded Views and Parts List 5-8.
Exploded Views and Parts List MP Ass’y Parts List ( SA.
Exploded Views and Parts List 5-9. Base Frame Exploded View & Parts List S6 14 S6 8 2 S10 9 3 11 6 S6 5 7 S11 S6 1 12 11 13 4 10 S6 5 Base Frame Parts List ( SA.
Exploded Views and Parts List 5-10.Pick-up Ass’y Exploded View & Parts List 11 17 10 13 S5 9 7 18 16 5 19 1 15 6 12 14 8 3 4 2 Pick-up Ass’y Parts List ( SA.
Exploded Views and Parts List 5-11.
Exploded Views and Parts List Drive Ass’y Parts List ( SA.
Exploded Views and Parts List 5-12. Main Frame Ass’y Exploded View & Parts List 0 19 S5 S5 23 28 13 27 12 22 32 25 33 25 24 24 24 26 29.
Exploded Views and Parts List Main Frame Ass’y Parts List ( SA.
Exploded Views and Parts List 5-13.
Exploded Views and Parts List FuserAss’y Parts List ( SA.
Exploded Views and Parts List 5-14.
Block Diagrams 6. Block Diagrams MAIN T M DEV H H SUPPLY V V BLADE LCD Only SCX-5312F SPGPe+ OPE RTC MICOM - LCD Drive - Key Scan SMPS / HVPS 24P ARM7TDMI +5V/+24V/+12V/+24Vs/Fuser UART * 2 Back-up Part MEMORY I/F SRAM 5P (32KB) FLASH ROM FLAT CACHE (8K) MOTOR DRIVER DMA CNTR SW2918 / TEA3718 (1MB) X 2EA F/W 15P D-SUB MOTOR 1 MOTOR 2 8P PVC 11P LSU GEU 2P THE RMISTOR 3P FAN 24P D-SUB CONN.
Connection Diagrams 7. Connection Diagrams 110V f or U SA 220V f or EU SCAN NER PART AC I N-LET (ONLY SCX-5312F) HEAT LAMP( Fuser ) REMARK : No r mal Conn ecto r THERMI ST OR 1 . T HERM1 2 . T HERM2 567 8 7. MTR2 _I B(0) 8. MTR2 _I B(1) 1. +24V DUPLEX SOL. 2. Cont rol DEV_I D 1 . T HERM1 2 . T HERM2 1. DEV_I D1 2. N C 3. DEV_I D CN4 OPE CN1 ADF CN 2 1.GND_5 1, 2. I NV_POWER 3, 4. GND_12 5. CCD_H OME 7 8 9 10 11 123 4 MOTOR_2 1. ADF_A 2. ADF_NA 3. ADF_B 3. GND_5 4, 5. NC 4.
Connection Diagrams Memo 7-2 Samsung Electronics
ELECTRONICS This service manual is also provided on the web, the ITSELF system Samsung Electronics Co., Ltd. “http://itself.sec.samsung.co.kr” © Samsung Electronics Co.,Ltd. MAY 2002 Printed in Korea. VERSION NO. : 1.
