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SAMSUNG SCX-4521F SERVICE MANUAL

1. NO Sub No Engine test Remark 0 1 Motor Test 1 On 2 Off next test selected 2 Pick Up Test 1 On 2 Off next test selected 3 Fan Test 1 On 2 Off next test selected 4 Manual Clt Test 1 On 2 Off next test selected 5 PTL Test 1 On 2 Off next test selected 1 1 LSU Motor Test 1 On 2 Off next test selected 2 LSU Hsync Test 1 On 2 Off next test selected 3 LD Test 1 On 2 Off next test selected 2 1 Feed Sensor Test 1 Check read the sensor 2 Next Next Sensor test 2 Exit Sensor Test 1 Check read the sensor 2 Next Next Sensor test 3 Cover Sensor Test 1 Check read the sensor 2 Next Next Sensor test 4 Empty Sensor Test 1 Check read the sensor 2 Next Next Sensor test 5 Manual Sensor Text 1 Check read the sensor 2 Next Next Sensor test 3 1 Therm ADC 180 1 On 2 Off maintain the fusing temp 80 C 2 Therm ADC 140 1 On 2 Off maintain the fusing temp 135 C 3 Therm ADC 120 1 On 2 Off maintain the fusing temp 160 C 4 Therm ADC 100 1 On 2 Off maintain the fusing temp 191 C 4 1 MHV Test 1 On 2 Off 1550V 50V 2 Dev Bias Test 1 On 2 Off 430V 20V 3 THV EN NEG Test 1 On 2 Off 1200V 300V 150V 4 THV ON 1300V 1 On 2 Off 1300V 20V 5 THV ADC 1300V 1 On 2 Off ADC Value 101 5 6 THV ADC 600V 3500V 1 On 2 Off Compare each ADC Valu
2. Samsung Electronics Service Manual Disassembly and Reassembly 5 16 RX Drive 1 Before you remove the RX Drive you should 4 Remove the Connector as shown below remove Scan Ass v Refer to the 5 9 Middle Cover Refer to the 5 13 Main PBA Refer to the 5 15 2 If necessary remove the two Bracket Port Main PBA and Ground as shown below Main PBA Bracket 5 Release the four Gears RDCN OPC Fuser Feed from the Frame as shown below 3 Remove the two screws securing the Engine Shield and remove the six screws securing the Frame then remove the RX Drive in the direction of arrow as shown below 6 Remove the four screws securing the Motor Bracket and remove it Then remove the two screws securing the Motor and remove it Gear Bracket Service Manual Samsung Electronics Disassembly and Reassembly 5 17 Fuser 1 Before you remove the Fuser you should remove Scan Ass v Refer to the 5 9 Middle Cover Refer to the 5 13 2 Unplug the two Connectors from the SMPS and Main PBA as shown below 4 Remove the Lever M Act Exit in the direction of arrow as shown below Thermister 3 Remove the four screws securing the Fuser and remove it as shown below 5 Remove the Cover M Safty as shown below Cover M Safty
3. 5 48 Service Manual Samsung Electronics Disassembly and Reassembly 6 Remove the Cover M Guide Exit as shown below 8 Remove the two screws securing the Thermo Cap and remove it Thermo Cap 9 Take out the Thermostat then release the CBF Harness as shown below 7 As shown below rotate the Holder to the direction of the arrow which is attached to the Exit Roller F Down and Exit Gear DRV17 The Roller_Main Roller_FR F Down Holder Spring will come out at the same time F Exit Gear Exit Roller F Down Roller FR ITN Roller Main RD KI Thermostat 10 Remove the screw securing the Harness and remove it Then take out the Thermistor as shown below NOTICE If vou don t follow the direction above the Spring will come out forcing the Roller Main Roller FR F Down Holder inside the Frame Ass v Gap Service Manual 5 19 Samsung Electronics Disassembly and Reassembly 11 Release the CBF Harness from the Halogen 12 Remove the two screws securing the Cover M Lamp and remove the two screws securing the and remove it Halogen Lamp as shown below 13 Take out the Halogen Lamp in the direction of arrow as shown below Halogen Lamp 5 20 Service Manual Samsung Electronics Disassembly and Reassembly 5 18 Engine Shield LIU PB
4. SA SERVICE AVAILABLE SNA SERVICE not AVAILABLE DNA Parts List DELIVERY not AVAILABLE Description amp Specification Location Service GROUND P VARISTOR ML 1610 SUS304CSP1 2H SNA 7 10 7 JC63 00623A GROUND P THV ML 1610 SUS304CSP 1 2H 0 2 SNA SNA MEA UNIT HOLDER_PAD ML 1610 SAMSUNG P0015 SA SPRING ETC EXIT ROLL FD ML 165 SUS304 WP SA 7 10 9 2 JC69 00846A PAD FRICTION ML 1610 NBB 1 5 39 GRAY 0 SA SA LEVER M KICKER P U ML 1610 POM 10 5 31 R1120 SNA MEA UNIT PICK UP GEAR ML 1610 SAMSUNG Y SA 7 10 11 1 _ JC66 00803A GEAR PICK_UP B ML 1610 POM 0 8 33 WHIT SA GEAR PICK UP A ML 1610 POM 0 8 33 WHIT P2057 SA SPRING CS SUS304 WPB P10 25 D3 25 L9 6 D4089 SA SOLENOID MP_R2 SCX 4720F DC24V SA 7 10 13 JC66 00809A GEAR FEED 35 19 ML 1610 POM 0 8 0 8 35 1 SA BUSH M TR L ML 1710 POM M90 44 BL K2886 SA PMO BUSHING_TR L SF 5100 POM CH 15 BL K3856 SA SA 7 10 17 JC66 00725A ROLLER TRANSFER SCX 4100 NBR ECO SUM24L T3014 SA HOLDER PTL ML 1710 PC BLK VO H4041 SA IPR P EARTH TRANSFER ML 1710 SECC 1 0T K3367 SA SHAFT P PICK_UP ML 1610 SECC 264 11 2 SA 7 10 25 JC66 00813A GEAR TRANSFER ML 1610 POM 0 6 24 BLK 1 SA SNA SA MANUAL WARRANTY CARD COMMON XSG ARABIC U SNA N A __ JC68 01508D MANUAL QRG SCX 4321 XSG TURKEY TURKEY M SNA SNA SNA ELA HOU
5. DIGITAL LASER MFP SCX 4521F Series SCX 4521F TEC Basic Model SCX 4521F S F R VI C Manual MM DIGITAL LASER MFP SCX 4521F Series The keynote of Product Machine Life 50 000Pages Cpu Chorus2 Device Memory 16MB Resolution 600 600dpi Option N A Printing Speed 22ppm LTR 20ppm A4 Print Memory 10MB Print Language SPL Path Type C Path Cassette Capa 150sheets Outlet Stacking Capa 50sheets Toner Cartridge initial 1K sales 3K ADF Capacity 30sheets Scan Method 600 dpi Color CIS Copy Speed SDMC 22Cpm Ltr MDMC 7Cpm Ltr Interface USB1 1 IEEE1284 This service manual is a property of Samsung Electronics Co Ltd Anv unauthorized use of Manual can be punished under applicable international and or domestic law This service manual is also provided on the web the ITSELF svstem Samsung Electronics Co Ltd http itself sec samsung co kr ELECTRONICS Samsung Electronics Co Ltd Oct 2005 Printed in Korea VERSION NO 1 00 CODE JC 6139A Contents Precautions 1 1 Safetv Warning 1 2 Safetv Caution 1 3 ESD Precautions Product Specification 2 1 Product Overview 2 2 Specifications 2 3 Model Comparison Table System Overview 3 1 System Outline 3 2 H W Structure and Descriptions 3 3 S W Structure and Descriptions 3 4 Initial Product Installation Alignment and Adjustments 4 1 Sample Pattern 4 2 Control P
6. KA Service Manual Samsung Electronics Reference Information Acronyms and Abbreviations 2 Abbreviations IEEE IPA IPM LAN Ib LBP LCD LED UL LSU MB MHz MPF NIC N N NVRAM OPC OPE PBA PCL PDL PPM PPS PS PTL PWM Q PID Q ty RAM ROM SCF SMPS SPGP SPL Spool SW sync USB WECA Explanation Institute of Electrical and Electronics Engineers Inc Isopropv Alcohol Images Per Minute local area network pound s Laser Beam Printer Liquid Crystal Display Light Emitting Diode Low temperature and low marshy place Laser Scanning Unit megabyte megahertz Multi Purpose Feeder Network Interface Card Normal temperature and normal marshy place nonvolatile random access memory Organic Photo Conductor Operate Panel Equipment Printed Board Assembly Printer Command Language Printer Control Language Page Discription Language Page Per Minute Pulse Per Second Post Script Pre Transfer Lamp Pulse Width Modulation Quick Printer Initiating Device quantity Random Access Memory Read Only Memory Second Cassette Feeder Switching Mode Power Supply Samsung Printer Graphic Processor Samsung Printer Language Simultaneous Peripheral Operation Online switch synchronous or synchronization Universal Serial Bus Wireless Ethernet Compatibility Alliance Samsung Electronics Service Manual KU Reference Information 11 3 Selecting printer locations e Leave enough room
7. 5 20 Paper Path Frame Before vou remove the Paper Path Frame vou should remove Scan Ass v Refer to the 5 9 Middle Cover Refer to the 5 13 Fuser Refer to the 5 17 Engine Shield Refer to the 5 18 2 Remove the four screws securing the Paper Path Frame and remove it in the direction of arrow as shown below 4 Remove the screw securing the Solenoid MP and remove it as shown below 3 Remove the Transfer Roller from the Frame as shown below Transfer Roller Bush L a Samsung Electronics Service Manual 5 23 Alignment and Adjustments 4 Alignment and Adjustments 4 1 User Mode The table below shows the map of User settings available in User Mode These are fully described in the User Guide and are not included here 1st level 2nd level 3rd level Default Value RETURN 4 RETURN left right amp amp Enter gt 1 Paper Setting lt q Paper Type p gt 14 character Paper Type left right amp amp Enter Plain Paper Thick Thin Bond Color Paper Card stock Labels Transparency Envelope Preprinted Plain Paper 2 Machine Setup 4 Machine ID gt Paper Size Machine ID Only SCX 4521F MA Legal Executive Folio A5 B5 A6 Letter Fax By Country ID Date amp Time only SCX 4521F 00 00 0000 00 00 AM Clock Mode only SCX 4521F 12 24 hou
8. 7 4 ADF Platen Assembly Exploded Views 7 5 OPE Unit Exploded Views 7 6 Drive Unit Exploded Views 7 7 Main Frame Assembly Exploded Views 7 8 MP Tray Assembly Exploded Views 7 9 Fuser Unit Exploded Views 7 10 Paper Path Assembly Exploded Views Part Number amp Description format Part numbers and descriptions are defined according to a company standard The information below will help you to understand the part number format and assist when ordering spare parts There are two types of Part number format 0000 000000 ex 2007 007961 R CHIP HNuee ocoooonm ex JB96 01268A ELA UNIT COVER TOP It shows part specific number WM letter Type 1 This format is used throughout Samsung on all product ranges Typically it is used for small components and electronic parts Type 2 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 A S privately used part It is only used for A S Ass y part Assemblies consisting of 2 or more parts Also used for Service manuals user guides and diagrams Ass y parts and A S privately used Parts can be distinguished by the part Code and Description They are always Type 2 format The 2 leading characters indicate private or assembly parts DIVISION PART CODE DESCRIPTION AI
9. Copy Speed Up to 22ppm in A4 22ppm in Letter Resolution Optical 600 600 dpi Scan 600 600dpi Print 600 600dpi Text amp Text Photo mode 600 300dpi ADF Platen Photo mode 600 600dpi Platen 600 300dpi ADF Enhanced First Copy Stand by Approx 16 seconds ADF Approx 11 seconds Platen Out Time From Power Save Mode Approx 46 seconds ADF Approx 40 seconds Platen 110V only Original Image type selection Text Text Photo Photo Zoom Range 25 400 Platen 25 100 ADF Multi Copy 1 99 Pages Preset Original 100 A4 A5 71 LGL LTR 78 LGL A4 83 A4 LTR 94 EXE LTR 104 A5 A4 141 25 50 150 200 400 Custom 25 400 Darkness Control 3 level Light Normal Dark Auto return to default mode Yes after 1 minute Time out option 15 30 60 180 sec Off Changeable Default mode Darkness Original Type Reduce Enlarge No of Copies ID Card Copy 2 up 4 up Collation Autofit LD Card Copv Clone Poster Yes ADF Only Yes ADF Only Yes ADF Only Yes Platen Only Yes Platen Only Yes Platen Only Yes Platen Only gt gt ar a 2 2 5 Telephone Specificationc Items SCX 4321 SCX 4521F Handset No On hook Dial Yes Search Yes Phone Book 1 Touch Dial 10 ea 0 9 Speed dial 90 locations 10 99 TAD I F Yes Tone Pulse Tone D
10. f 1 Check Power part 1 The printer does not work no matter how long you wait A Is the Power Switch printer and wall socket turned on B Is the Power Cord connected to the printer correctly C Is the Power cord connected to the wall socket correctly D Is wall socket working E Is the unit rated at the same voltage as the supply 2 Does the Fan work when power is turned on A Check the connectors on the SMPS B Check the fuses in the SMPS F1 2 Check the Installation Environment 1 Ensure the installation surface is flat level and free from vibration If necessary move the printer 2 Ensure that the temperature and humidity of the surroundings are within specification If necessary move the printer 3 Ensure that the printer is position away from any air conditioning or other heating or cooling equipment Also ensure that is not positioned in a direct draft from any air conditioning fan or open window If necessary move the printer 4 Ensure the printer is not positioned in direct sunlight If it is unavoidable use a curtain to shade the printer 5 Ensure the printer is installed in a clean dust free environment Move the printer to clean area if necessary 6 Some industrial or cleaning processes give of fumes which can affect the printer Move the printer away from this type of air pollution 3 Check paper type 1 Use only paper which is of a suitable quality weight and size
11. 93 0667mm sec 11 1 2 13 4 Paper detecting Sensor Photo Sensor Paper Size Sensor None Paper Separating Pad Material NBB 52 u 0 8 1 2 14 Separating Pad Pressure TBD 150 gf 15 Pick up Roller RPM 47 683 RPM 16 Feeding Pressure Same as Transfer Roller TBD 150 200 gf SPRING H mm based on 1sheet TBD 150 200 gf SPRING H mm based on 150sheets 17 Paper Exit Type Face Down 18 Feed Roller Force TBD Kg f or more 19 20 21 22 Feed roller Velocity mm sec Feed Roller Material Spring Feed Tensile Force TBD gf Exit Sensor Photo Sensor 8 Deverope v v vV V V V vV vy iv v Process Developing Method Non magnetic 1 element contacting method Toner Non magnetic 1 element shatter type toner Toner Qty 35 gf 60gf 1k 3k The life span of toner 1k 3k sheets ISO 5 Coverage Toner Residual Sensor None OPC Cleaning Use the conventional cleaning blade Handling of wasted toner Discard by collecting waste toner at waste toner bin OPC Drum Protecting Shutter None Classifying device for toner cartridge ID is classified by interruption of the frame channel Development Roller type conductive elastic roller Doctor BLADE Type Regulating toner layer by pressure Charge Roller Type Conductive Roller Contact Charge 9 Sanner Part 600dpi Color CIS Module for Flat bed SCX 4517F uses the CIS scanning method 1 CIS SPEC gt vvvvvvvvvyv
12. Open the front cover and check odically at the top of a black image ribs that corresponds to the position of the voids Remove if found 5 If the problems are not solved replace the developer cartridge ga Service Manual Samsung Electronics Troubleshooting 6 5 3 Horizontal Black Band 1 Dark or blurry horizontal stripes occur in the printing periodically i Pager ahaa They may not occur periodically Check and Cause Solution Digital Printer 1 Bad contacts of the voltage terminals to Digital Printer eaves Digital Print Digital Print 2 The rollers of developer may be stained OPC Drum 75 5mm Charge Roller 37 7mm Supply Roller 47 5mm Develop Roller 35 2mm Transfer Roller 46 2mm Heat Roller 63 9mm Pressure Roller 75 4mm 1 Clean each voltage terminal of the Charge Supply Develop and Transfer roller remove the toner particles and paper par ticles 2 Clean the right Gear that has relatively small gap of the teeth in the OPC 3 If the malfunction persists replace the developer 6 5 4 Black White Spot 1 Dark or blurry black spots occur periodically in the printing Description 2 White spots occur periodically in the printing Check and Cause Solution Digital Printer Digital Pringi cally the rollers in the Developer may be Digital Printer contaminated with foreign matte or paper Digital Printer particles Dig
13. The printer does not print via a 1 Connect the printer using a Parallel or USB cable and ensure network connection that the computer can print If not check that the printer drivers are installed correctly 2 If the printer can print via a local connection check Printer Properties Ports and ensure that a TCP Ip port has been allo cated to the printer EJ Service Manual Samsung Electronics Troubleshooting 6 12 SyncThru Installation Problems File Transfer Error message appears during 1 Make sure that any previously installed version of SyncThru is the Installation process uninstalled Restart your PC after uninstalling previous versions 2 If the problem continues In Windows 95 98 boot into MS DOS mode and delete the sammon dll file in the windows system directory the restart Windows and reinstall SyncThru In Windows NT stop the spooler service using Services in Control Panel delete the sammon dll file in the windowsisvstem32 directory then restart the spooler service and reinstall SyncThru Unable to add the Port list of Samsung ports Verify that your PC restarts after installing SyncThru message appears when you add a port Service Manual i Samsung Electronics Exploded Views amp Parts List 7 Exploded Views and Parts List SCX 4521F TEC 7 1 Main Exploded Views 7 2 ADF Assembly Exploded Views 7 3 Platen Cover Assembly Exploded Views
14. j Check and Cause Solution 1 Check for CIS problem on the Main PBA 2 Check shading profile 1 Check the CIS FFC Cable is properly connected 2 Redo shading profile in the tech mode Samsung Electronics Service Manual Troubleshooting 6 7 3 Abnormal noise Description There is noise from the ADF when copying Check and Cause Solution 1 Check the Scanner Motor gearbox and rollers 1 Check for correct assembly of gears and motor Ensure no parts are fouling and there are no foreign objects in the mechanism or scanner path Replace any worn parts 2 Check the Motor Driver on Driver PBA 2 Replace the main PBA and ADF PBA in seguence 6 7 4 Defective Image Quality Description The copied image is excessively light or dark Check and Cause Solution 1 Check shading profile 1 Redo shading profile in the tech mode 2 Check the gap between original and scanner 2 Agap of more than 0 5 mm can cause a blurred glass image Ensure rollers and cover close correctly Replace as necessary 3 Check printing quality 3 See Print troubleshooting 6 28 Service Manual Samsung Electronics Troubleshooting 6 8 Scanning Problems Causes and Solutions 6 8 1 PC Scanning problems Description Unable to scan using a PC l Check and Cause Solution 1 Check the Cable USB or Parallel is properly 1 Reconnect the PC and printer replace any faul
15. v 2 Scan Scanning size 216 mm width for letter size Light source LED Scanning sensor CIS 600 300 dpi Scanning mode Color SCAN Mono SCAN MTF 30 300 dpi Chart CIS interface Analog output Power supply 3 3V Clock Frequency 5 5MHz max Number of output 1 LED Current Green Blue 50mA Red 60mA Clamp Level 1 4V Connection 12 pin FFC connector pitch 1 0mm Resolution a Translation gt Normal Vertial 3 85 Line mm Horizontal 8 Pels mm 203 x 98dpi gt Fine Vertial 7 7 Line mm Horizontal 8 Pels mm 203 x 196dpi gt Super Fine Vertial 11 8 Line mm Horizontal 11 8 Pels mm 300 x 300dpi b When Copy Vertial 11 8 Line mm Horizontal 23 6 Pels mm 600x300dpi ADF Vertial 23 6 Line mm Horizontal 23 6 Pels mm 600x60Odpi Platen 3 Half Tone Grav Scale 256 Levels 4 Scan Line Time a Tx gt Normal 1 5 ms Line gt Fine 1 5 ms Line gt Super Fine 1 5 ms Line b Copy 1 5 ms Line c Scan gt Color 4 5msec line gt Gray 4 5msec line gt Mono 4 5msec line 5 Scanning Width gt MAX SCAN WIDTH 216 mm 8 5 inches gt Effective Scan Width 208 mm 6 ADF Motor a Motor Spec gt Aang 24V DC gt AAAS 0 6A Peak 7 Motor Driver speed amp method a FAX Transmission gt Normal Mode 2000 pps 2 2 gt Fine Mode 1000 pps 2 2 gt Super Fine Mode 667 pps 2 2 b Copy Job 667 pps 2 2 gt max 30sheets 50gf gt
16. Remove the five screws securing the OPE PBA and assemble the SCX 4321 and remove it 1 Open the ADF Housing and insurt a flat blade F a screwdriver into the crack as shown below and OPE PBA l remove the OPE Unit from the Platen Housing ADF Housing 4 Release the Contact Rubbers as shown below Rubber Scroll 2 Unplug the three Connectors Battery OPE Full Sensor as shown below OPE Cover Service Manual gJ Samsung Electronics Disassembly and Reassembly 5 12 Platen Housing remove Scan Ass v Refer to the 5 9 ADF Housing Refer to the 5 10 OPE Unit Refer to the 5 11 Before you remove the Platen Housing you should Remove the five screws from the Scan Upper and remove it from the Scan Lower as shown below Scan Lower Scan Upper 4 Push the Holder in the direction of arrow and remove the Belt as shown below The CIS will come out at the same time 5 Release the Belt and Flat Cable from the CIS 3 Take out the Battery Battery Flat Cable 5 12 Service Manual Samsung Electronics Disassembly and Reassembly 6 Remove the two screws securing the Scan Motor 8 Using a flat blade screwdriver remove the Full Ass v and remove it Sensor as shown below 7 If necessary remo
17. as shown below 3 From the Orientation option of the Layout tab set the Rotate option to 90 4 Click OK to start printing For details see Software User s Guide 2 Open the printer s properties window set the paper size to A5 from the Paper tab 4 6 3 5 Tips for Avoiding Paper Jams By selecting the correct paper types most paper jams can be avoided When a paper jam occurs s Follow the procedures in Loading Paper Ensure that the adjustable guides are positioned correctly s Do not overload the tray e Do not remove paper from the tray while your machine is printing e Flex fan and straighten the paper before loading e Do not use creased damp or highly curled paper e Do not mix paper types in the tray e Use only recommended print materials See Paper Specifications e Ensure that the recommended print side of print materials is facing up in the tray Service Manual 4 26 Samsung Electronics Svstem Overview SCX 4517F is made of Main Control part Operation Panel part PC Interface part Scan part Line Interface part Power part Each part is independent with each other and the design concept is common use standard design rule Chorus2 ASIC which is made for oniv printer is used in the Main Control part and another Micom which can communicate with Chorus2 through UART for Kev Scan LCD displav LED control etc is used for OPE Panel part PC Interface control part USB 1 1 and IEEE1
18. min isheets 20gf 8 Document Detect sensor a Type c LED max current max voltage d Output Logic H Logic L e Lever Sensor DOC 9 Regi Detect sensor a Type b Position c LED max current max voltage d Output Logic H Logic L e Lever Sensor DOC Photo interrupt 30mA 3 3V Not Paper Paper ADF Lower Torsion Spring Photo interrupt ADF PBA 50mA 3 3V Not Paper Paper ADF Lower Torsion Spring 10 Document Scan sensor a Tvpe b Position c LED d Output Max current Max Voltage Logic H Logic L e LEVER SENSOR SCAN 10 OPE Operational Panel Equipment 1 Ope Panel OPE Panel has a MICOM Chip on it and communicates with Main CPU using Serial communication Line SIO OPE Panel consists of Micom Key Matrix Part LED Driving Part and LCD Part Photo interrupt ADF PBA 50mA 3 3V Off No Position No Paper On Doc Position Paper Scan Lower Torsion Spring 2 Kev Description No Part Feature Function 3 4Key Dialing and Option Input Start Starting Fax Copy Job Stop Clear Cancel Current Job Return to default Menu Option select 1 Common Upper Level Return to upper level menu Enter Option select Execute gt Next menu or Next option item lt Previous menu or Previous option item 2 Save Toner Save TONER SAVE MODE select Reduce
19. 2012 SNA SNA SNA SA N A_ JC39 00482A CBF HARNESS MICRO SW ML 2010 WIRE HARNES SA SNA __ N A__ JC61 00060A SPRING ETC TS BLADE ML 6060 SUS304 WPB 0 _ oo O OT y y S O oa N A _ JC62 00149A SEAL CAP DEVE ML 1610 POLYURETHANE FOAM SNA SNA _ N A__ JC62 00151A SEAL DEVE L ML 1610 PTFEFELT MICROURET 000000 O y O aA SEAL FILM REAR ML 1610 PET T0 075 9 22 SNA N A JIC63 00873AJSHEET PATH ML 1610 PET TO 188 8 6 16 BLA SNA SNA SNA GEAR SUPPLY ML 1610 POM 0 6 0 6 20 19 SNA N A _ JC66 00820A GEAR DEVE ML 1610 POLYKETONE 0 8 14 NT SNA SNA _ N A__ JC66 00827A SHAFT RDCN ML 1610 SUS303 L24 D3 NTR A O oa ROLLER CHARGE ML 1610 NBR ECO D12 L230 N SNA N A JIC66 0O851AJROLLER DEVE ML 1610 CONDUCTIVE NBR D14 0 SNA SNA __ N A___ JC70 00153A IPR ELECTRODE CHARGE ML 4500 SUS301 8 _ A SNA PMO HOLDER CR SF 5100 POM BLK SNA N A JIC72 00672AJPCT LCD WINDOW SF 535E PC SHEET T0 38 SNA SNA SA PMO BUSHING_CHARGE ML 80 POM BLK HB SNA N A JIC97 02153AJMEA UNIT OPC ML 1610 SEC DRUM24 EARTH SNA SNA SNA MEA ETC SUS BLADE ML 1610 SEC SEC SUS BL SNA N A JIC97 02183C IMEA UNIT FRAME REP SCX 4521F SEC REP SNA MEA UNIT WTB SCX 4521F SEC REPLACE SNA SNA TAPE DOUBLE FACE 3M9448HK 10 16 W4 L280 SNA N A 0203 001267ITAPE DOUBLE FACE 3M9448HK T0 16 W8 L280 SNA SNA SNA N A 3301 001742JCORE FERRITE AD 32X35X7 75MM SNA HOLDER M_CIS SCX 4100 POM BLK HB SNA SNA SNA N A __ JC6
20. 2mm STR SNA SA SNA HEADER BOARD TO CABLE BOX 3P 1R 2mm STRA SNA N A 3711 003410IHEADER BOARD TO CABLE BOX 4P 1R 2mm STRA SNA SA SNA JACK USB 4P 1C AU30U BLK ANGLE B TYPE SA N A 3722 002345 JACK MODULAR 6P 4C INVERTED N ANGLE N GR SA SNA SNA SCREW MACHINE PH M3 L8 NI PLT SWRCH18A SA N A 6002 000440 SCREW TAPPING PWH 2 M3 L8 ZPC BLK S SA SA SNA SCREW TAPTITE BH S M3 L6 ZPC YEL SW SA N A 6003 000282 SCREW TAPTITE BH B M3 L8 ZPC BLK SW SA SNA SNA CABLE CLAMP DAWS 8NE D11 L34 8 NYLON6 SA N A 6902 000288 BAG PE LDPE T0 05 W250 L450 TRP 8 2 SNA SNA SNA BAG CONDUCTIVE LDPE 10 1 W200 L450 BLK SA N A___ JB68 00073A LABEL R BAR CODE SF 3000 PV 38X6 5 T0 1 SNA SNA SNA N A___ JC39 00480A CBF HARNESS MAINMOTOR SCX 4521F WIRE HAR SA SA SA PCB LIU SCX 4521F FR 1 1L 1 61 210 X 1 SNA N A___ JC46 00251A S W APPLICATION CD SCX 4521F DRV 1 00 SNA SNA SNA ROLLER EXIT F DOWN ML 1610 SUM22L EPDM 1 SA N A___ JC66 00934A ROLLER M_EXIT FR ML 1610 TEFLON NTR 6 5 SNA CAP M THERMO ML 1610 PET GF30 1 2 11 92 H4087 SNA LABEL R HV FUSER ML 6060 PVC 220V L0006 SNA N A_ JC68 00573A LABEL R BARCODE ML 4500 PET T0 05 10mm SNA MANUAL REGISTRATION CARD COMMON XGE ARAB SNA SNA LABEL R POP_ENG COMMON SEC PASCAL 340 SNA N A_ JC68 01584A LABEL P BLANK 90 25 CLP 510 SEE ART 100 SA LABEL P SERIAL NO ML 85 ART 70X15 G100 SNA SNA SNA Parts List SA SERVICE AVAILABLE SNA SERVICE not AVAILABLE D
21. 5 SA N A JB72 00822A PMO SLEEVE ADF SCX 1110F RPOM BLK SA N A JB72 00823A PMO SLEEVE PICK UP SCX 1110F POM BLK SA N A JB73 00054AJRMO ADF ROLLER SCX 1110F XRX EPDM RUBBER SNA N A JB73 00055A RMO PICKUP ROLLER SCX 1110F XRX EPDM RUB SNA N A JC41 00193B PCB ADF ROCKV2 SCX 4720F FR 1 1L V1 0 1 SNA Block diagram 8 Block Diagram 8 1 System Block Diagram JNOHd x INI Nv 43SN4 liyd A 39VJH3INI SNOHd IX3 Lud ON LVH343S SNOHd 1X3 8 WAGON YHOSNAS 0314 YOSNAS ALdW3 d GND 940 Add 19U97 HH tMd OV M S N3dO H3AO9 HV3H HOSN3S 0314 LID Adze MOLL OW 30VJH3INI INI Xd XL 009 009 HINHOJSNVEL ra CSAY M S N4dO H3400 HVAH TApz Q O Jovi Q Q ne Q O jiu LAvet Nvet AGt M S 43MOd 8 LJINI f A HOLA ulen d d dv d1S8Z6 Y H3AIHQ YOLOW Luvd Olcnv NIVH YOLON ule HOLON HOLIMS eld NSI NSI dv Z X 81 Y3A180 YOLOW u e d dit 119 NSI de JJV DIS SID Lud WAGON YOLSINYSHL sdqyg ee 9EEN4 N300W LEXA WL 0d9 WNHILXI SWZ AXOWSWN HSV 14 N91 WVHOS JoyeinBoy MAS Joss 901g abel WOL6NYY EA d6l d9t dS v8613331 LL 8SN Z X 81 J9A11Q LOW sav Adv M y g 99 3q SWOH SID H43A14Q HOSNIS NVOS 43 H3AIHO 031 001 09987 1H dv dtl YOLOW N
22. Adjustments 4 2 2 Setting up Svstem in Tech Mode 1st level 2nd level 3rd level Default Value RETURN 4 RETURN left right amp amp Enter p 14 character left right amp amp Enter Tech Mode Data Setup Send Level 9 15 4 Data Setup gt only SCX 4521F Modem Speed 33 6 28 8 14 4 12 0 9 6 4 8 only SCX 4521F Error Rate only SCX 4521F 5 10 Dial Mode only SCX 4521F Tone Pulse Notify Toner Customer No Customer Name Service No Serial No Clear All Mem Clear Count Total Page Count Enter Password CRU Print CNT FLT Scan Count ADF Scan Count Used Toner CNT Edit Toner Dot Flash Upgrade Local Remote Silence Time Off 12 Sec Unlimited only SCX 4521F Machine Test Switch Test Modem Test only SCX 4521F Dram Test Rom Test Pattern Test Shading Test Report Protocol only SCX 4521F System Data Key History Error Info New Cartridge Service Manual Samsung Electronics Alignment and Adjustments 4 2 3 Setting 4 2 3 1 Changing the Displav Language To change the language that displavs on the control panel follow these steps D O NS Press Menu until Machine Setup appears on the top line of the display Press the scroll button 4 or p until Language appears on the bottom line of the display Press Enter The current setting appears on the bottom line of t
23. CASSETTE_R ML 1610 ABS 2 5T 120 SA 7 7 8 JC70 00499AJADJUST M CASSETTE L ML 1610 ABS 2 5T 120 SA FOOT FRONT ML 1750 NBR D7 11 5 F1011 SA SA GEAR OPC DR 76 38 29 ML 1610 POM 0 6 0 8 SA 7 7 13 JC66 00807A GEAR FUSER DR 63 35 ML 1610 POM 0 6 0 8 SA GEAR FEED DR 41 ML 1610 POM 0 8 41 WHI F6076 SA LEVER M ACTUATOR_EMPTY ML 1610 ABS 27 K3816 SA GROUND P OPC ML 1610 SUS304CSP 1 2H 0 2 SA 7 7 18 6107 001240 SPRING CS SUS304 WPB GROUND END PIO 6 D1 SA CAP M MOTOR ML 1610 HIPS 2 0 60 5 52 4 SNA SNA FAN DC_HUMMINGBIRD ML 1710 SA 7 8 0 JC97 02239AJMEA UNIT MP TRAY SCX 4521F SEC MP TRAY SA SA SA ADJUST M MP R SCX 4521F HIPS 2 5 127 8 9 SA 7 8 5 JC63 00711AJSHEET MP SCX 4521F PET TO 188 215 0 60 8 SA 9 1 L INmg JCET 01 162AJFRAME P FUSER ML 1610 SECC 1 264 F2122 SNA 1 9 2 7 JC63 00615A COVER M_FUSER ML 1610 PET GF30 2 72 311 Z2149 SNA Aes MEETA HOLDER M EXIT R ML 1610 PC 1 5 10 20 BLK SA 9 4 JC66 00810A GEAR EXIT_DRV17 ML 1610 POM 0 8 17 BLK SA SNA 7 p 6 _ _ 6107 001168 SPRING CS PW 2 P10 95 D5 95 L16 ID D4085 SA A i ia BEARING PRESSURE R ML 165 PPS RBA313N SA 4 8 JC61 00595A GUIDE M INPUT ML 1710 PET GF30 BL SNA 7 99 JC66 O0600AROLLER PRESSURE ML 1710 SUM24L LSR PFA 2 TPO SA SA GEAR FUSER Z37 ML 1710 PPS OFL4036 0 8 SA 7 9 2 JC61 00589A BUSH M HR L ML 1710 PPS RBA313N SA BUSH M HR R ML 1710 PPS RBA313N K2880 SA 7 9 4 4713 001202 LAMP HALOGEN 230V 600W 6X284
24. Compliant Window XP Window XP Printable Area A4 201 6x288 6mm A4 201 6x288 6mm LTR 207 6x270 6mm LTR 207 6x270 6mm Legal 207 6x347 6mm Legal 207 6x347 6mm Folio 207 6x322 6mm Folio 207 6x322 6mm Halftone Gray Scale 256 levels 256 levels 2 2 3 Scan Specifications Items Compatibility SCX 4321 Twain standard WIA Standard Window 2000XP SCX 4521F Twain standard WA Standard Window 2000XP Scan Method 600dpi Color CIS Contact Image Sensor Module 600dpi Color CIS Contact Image Sensor Module PC Scan Speed Lineart Halftone 10sec Platen 13sec ADF 10sec Platen 13sec ADF through Platen Gray 23sec Platen 26sec ADF 23sec Platen 26sec ADF Color 300dpi 65sec Platen 70sec ADF 65sec Platen 70sec ADF Resolution Optical 600 x 600 dpi 600 x 600 dpi Enhanced 4800 x 4800 dpi 4800 x 4800 dpi Halftone 256 levels 256 levels Scan Size Max Document Width Max 216mm 8 5 Max 216mm 8 5 Effective Scan Length 297 mm 11 7 297 mm 11 7 Effective Scan Width Letter Legal 208mm 8 2 A4 202mm Letter Legal 208mm 8 2 A4 202mm Scan to Button Yes Yes Application Yes Yes Scan Depth Color 24 bit 24 bit Mono 1bit for Line art Halftone 8 Bit for Gray scale bit for Line art Halftone 8 Bit for Gray scale Samsung Electronics Service Manual 233 Product Specifications 2 2 4 Copy Specifications Descriptions SCX 4321 SCX 4521F
25. Key Sound On Off Alarm Sound On Off 43 Service Manual Samsung Electronics lt continue gt 1st level 2nd level 3rd level Alignment and Adjustments Default Value RETURN 4 RETURN left right amp amp Enter p 10 Maintenance 4 Clean Drum p 14 character Clean Drum left right amp amp Enter On Off Notify Toner On Off Clear Memory Clear All Mem Paper setting Machine Setup Copy Setup Fax Setup Fax Feature Advanced Fax Sound Volume Sent Report RCV Report Phone Book Remote Test only SCX 4521F On Off Samsung Electronics Service Manual Alignment and Adjustments 4 2 Tech Mode and Setting 4 2 1 How to Enter Tech Mode In service tech mode the technician can check the machine and perform various tests to help with failure diagnosis When in Tech mode the machine still performs all normal operations To enter the Tech mode SCX 4521F To enter the Tech mode press i 3 in sequence and the LCD briefly displays TECH the machine has entered service tech mode To enter the Tech mode SCX 4321 To enter the Tech mode press 0 GO B insequence and the LCD briefly displays TECH the machine has entered service tech mode 45 Service Manual Samsung Electronics Alignment and
26. MI SA SA SA 75 11 JC64 00114A KEY M_START SF 565P ABS D28 6 HB BLUE SA KEY M_FAX_R2 SCX 4720F ABS HB G71335 SA KEY M_SCROLL_R2 SCX 4720F ABS HB G7133 K0024 SA SA 7 5 15 JC64 00059C KEY M_RESOLUTION_R2 SCX 4720F ABS HB G SA LCD DISPLAY XEV VHX1620BHRC9 SCX 5312F SA SA SA SA SERVICE AVAILABLE SNA SERVICE not AVAILABLE DNA Parts List DELIVERY not AVAILABLE Description amp Specification Location Service SHAFT M ADF SCX 4521F PC 184 52 6 9 BLAC SNA 7 6 2 JC72 00744AJPMO SHAFT PICK UP SCX 5150 ABS BLK HB SA HOUSING M PICK UP B ML 1610 ABS HB 3 P2068 SA HOUSING M PICK U ML 1610 POM 35 NATU P2067 SA RUBBER PICK_UP ML 1610 EPDM IR MN SA 7 6 4 JC66 00811A CAM M PICK_UP ML 1610 POM 4 W21 PHI12 NT SA ELA UNIT RX DRIVE ML 2010 SAMSUNG SNIP D4033 SA SNA GEAR RDCN 139 83 ML 1610 POM 0 5 0 6 139 SA 7 6 5 4 JC31 00037D MOTOR STEP MAIN M55SP 2NK ML 2010 1 2A 7 SA PMO IMPELLER_DRV ML 6200 NYLON66 BLK K4023 SNA FRAME M BASE ML 1610 ABS VE 0860P B B0080 SNA MEA UNIT PLATE KNOCK UP ML 1610 SAMSUNG SA 7 7 2 1 JC61 01158AJPLATE M KNOCK UP ML 1610 HIPS HB T2 W80 SA SHAFT P CORE ML 1750 SECC 1 2T 203 P2158 SA PMO IDLE KNOCK UP MP ML 2150 POM BLK M P0041 SA sh 7 7 3 JC61 01258AJSPRING ETC TORSION DEVE L ML 1610 SUS304 24271 SA SA SA ADJUST M
27. Machine machine displays on the LCD until DOOR OPEN amp CLOSE PAPER JAM 2 Paper Jam 2 Check Inside When the machine encountered paper jam in paper exit of Machine machine displays on the LCD until DOOR OPEN amp CLOSE Communication Error COMM Error When the machine has problem in communication It displayed on the LCD Machine displays this in case of Transmission Machine displays this in case of fax handshaking step of Reception Line Error Line Error When the machine has problem in case of Fax Data reception step NO ANSWER No Answer When the machine could not connect to remote fax after Completion of redial up to redial counter in system data INCOMPATIBLE Incompatible Remote party did not have the requested feature such as polling LINE BUSY Line Busy The remote fax didn t answer POWER FAILURE Power Failure When the machine s user memory has not been backup and There was power off on STOP PRESSED Stop Pressed When the operator pressed the STOP button during transmission MEMORY FULL Memory Full When the machine has encountered the user memory was full FUSER ERROR CRU Fuse Error When the machine failed in installing the new toner cartridge LSU ERROR Hsync Error tech mode LSU ERROR LSU Error user mode When the machine has encountered the Laser Beam Scanning unit could not reach the
28. Max frequency 5MHz CIS Line time Fax Copy 1 5ms PC Scan 4 5ms White output volt Max 0 8V 4 ADF Driving Part Driving ADF Stepper motor and the maximum motor speed is 2000PPS MOTOR DRIVER A3978 Allegro Driving Voltage 24V DC Phase 2 2 Phase 2000PPS at Quick Scan 2 2 Phase 1000PPS AT Fine Scan 2 2 Phase 667PPS AT Super Fine Scan 4 Fax Modem Part 1 Modem Part The modem part is consist of FM336 FAX Modem chip LIU Line Interface Unit and modem analog front end AFE functional part The feature of the SFM336 modem chip is as below Communication Mode Half Duplex 2 Modem Method GROUP 3 ITU T V34 V17 V29 V27ter Tonal Signal ITU T T 30 Binary Signal ITU T V 21 T 30 3 Image Transmission Time 3sec ITU T NO 1 CHART Memorv Tx ECM Data Compress MH MR MMR JPEG 6 Modem Speed 33600 28800 14400 12000 9600 7200 4800 2400 bps Receive Level 0 48dBm Output Level Adjustable 6 15dBm 1dBm Step Initial Setting 12dBm Receive dynamic range 0 dBm to 43 dBm for V 17 V 29 V 27 ter and V 21 9 dBm to 43 dBm for V 34 halfduplex 2 The Gain of the Line signal can be adjusted by setting the register value of the FAX modem chip Tx and Rx path is almost directly connected to the impedance matching transformer of the LIU Adjust Tx Level within Setting Level 0 2dB range Adjust Rx Level that has the same level as the TIMS out level i
29. N A 2007 000086 R CHIP 5 6Kohm 5 1 10W TP 1608 SA SA SA SA N A 2007 000093 R CHIP 20Kohm 5 1 10W TP 1608 SA SA SA SA N A 2007 000098 R CHIP 56Kohm 5 1 10W TP 1608 SA SA SA SA N A 2007 000113 R CHIP 330hm 5 1 10W TP 1608 SA SA SA R CHIP 1 5Kohm 5 1 10W TP 1608 SA N A 2007 000131 R CHIP 91Kohm 596 1 10W TP 1608 SA SA SA l N A 2007 000368 R CHIP 130Kohm 5 1 10W TP 1608 SNA SA SA SA N A 2007 000730 R CHIP 3000hm 5 1 4W TP 3216 SA SA SA Parts List SA SERVICE AVAILABLE SNA SERVICE not AVAILABLE DNA DELIVERY not AVAILABLE N A 2007 001045 R CHIP 560hm 5 1 4W TP 3216 SNA SA SNA R CHIP 17 4Kohm 1 1 10W TP 1608 SNA N A 2007 008567 R CHIP 15 4Kohm 1 1 10W TP 1608 SNA SNA SA RC NETWORK 1K 5 1K 390hm 10 1 50pF 6V SNA N A 2203 000189 C CER CHIP 100nF 80 20 25V Y5V 1608 SA SA SA C CER CHIP 0 15nF 5 50V COG 1608 SA N A 2203 000384 C CER CHIP 0 015nF 5 50V COG 1608 SA SA SA C CER CHIP 0 33nF 5 50V COG 1608 SA N A 2203 000815 C CER CHIP 0 033nF 5 50V COG 1608 SA SA SA C CER CHIP 0 22nF 5 50V NP0 1608 SA N A 2203 001683 C CER CHIP 0 068nF 5 50V NPO 1608 SA SA SA C CER CHIP 100nF 10 50V X7R 1608 SNA N A 2203 005819 C CER CHIP 1000nF 80 20 16V Y5V 1608 SNA SA SA C AL SMD 10uF 20 16V WT TP 4 3x4 3x5 8m SA N A 2703 000125 INDUCTOR SMD 10uH 10
30. Output Logic H Off No Position No Paper Logic L On Doc Position Paper e LEVER SENSOR SCAN Scan Lower Torsion Spring Samsung Electronics Service Manual Svstem Overview 3 5 OPE Operational Panel Equipment 1 Ope Panel OPE Panel has a MICOM Chip on it and communicates with Main CPU using Serial communication Line SIO OPE Panel consists of Micom Kev Matrix Part LED Driving Part and LCD Part 2 Kev Description Feature Function Common Dialing and Option Input gud jad Specie MTIFIETTII idiziidizi Copv IC POSI ADSUST REG U7 ar ve ki jx F 3 U8 IC EEPROM 256x12Bit CMOS LOGIC INVER TER U10 g ANE a BE IC MOTOR DRIVER U12 3 Fax ie same time 3 LCD Part Number of Characters 16 Characters x 2 line Clock Date display System Status display Alarm Error Message display Function Dialog Message display 3 12 Service Manual Samsung Electronics Svstem Overview 3 6 SMPS 8 HVPS It is the power source of entire system It is assembled by an independent module so it is possible to use for common use It is mounted at back of the machine Power part is divided by two independent PBAs SMPS PBA and HVPS PBA SMPS PBA supplies the DC power for driving the system and supplies the AC power to the fuser SMPS has two output channels 5V and 24V HVPS PBA supplies High voltage to the developer part to ma
31. PC 2 7 110 76 7 SA 7 2 1 3 JC92 01618AJPBA SUB ADF SCX 4920N DELL ADF 1 SA SA SA ROLLER DRIVE SCX 4216F CR SUM24L 14 SA 7 2 1 7 JB72 00819A PMO BUSH SCX 1110F POM NTR SA SA SA PMO ACTUATOR SCAN SENSOR SCX 4216F PC BL SA 7 2 1 11 6107 001135 SPRING CS SUS304 WPB P10 3 L14 l SA SA SPRING ETC TORSION DOC CC2 F SCX 1110F Z4274 SA SA SERVICE AVAILABLE SNA SERVICE not AVAILABLE DNA Parts List DELIVERY not AVAILABLE Description amp Specification Location Service PLATE M_WHITE BAR SCX 4521F ABS 2 20 24 SA 7 2 1 15 JC72 01009AJPMO ACTUATOR DOC SENSOR SCX 4114F ABS BL SA GEAR CLUTCH 29 SCX 1110F POM DELIN500P SA SA ROLLER EXIT SCX 4216F CR SUM24L 14 SA 7 2 2 JC97 02206A MEA ADF UPPER SCX 4521F SEC ADF UPPER SA SA SA HOLDER M ADF SCX 4114F POM BLK SA 7 2 2 2 2 _ JC63 00243A SHEET ADF HOLDER SCX 4114F PC SHEET 0 12 SA SA JC61 00387A SPRING ETC PAD ML 9400W SUS304WPB PIO 5 0028 SA GUIDE STACKER SUB SCX 4216F PC ABS 2 5T SA 7 2 2 4 JC66 00594A SHAFT STACKER SCX 4114F SUM24L 31 2 4 SA SA SA MEC ADF ROLLER ASSY SCX 1110F XRX XEROX SA 7 2 3 4 JB72 00843AJPMO GUIDE PAPER SCX 1110F HIPS 1V21 SA SA SA COVER M PLATEN SCX 4521F HIPS 2 5 433 79 SA 7 3 2 JC63 00209AJSHEET WHITE SPONGE SCX 4216F PC SHEET SP SA PMO TX STACKER SEC
32. See the user guide 4 Check the overall condition of the printer 1 Is the printer properly maintained Clean the Paper Transport Passages Any rollers with dirt surfaces should be cleaned or replaced Service Manual 63 Samsung Electronics Troubleshooting 6 2 Bad discharge 6 2 1 Wrong Print Position Description Printing begins at wrong position on the paper Check and Cause Solution Wrong sense time caused by defective feed sensor Replace the defective actuator actuator 6 2 2 JAMO e Description 1 Paper is not exited from the cassette 2 Jam 0 occurs if the paper feeds into the printer BIN PATH Check and Cause Solution 1 Check the Solenoid bv using Engine Test Mode Pick 1 Replace the solenoid up Test 2 Check if the pad is loose due to bad sealing of the 2 Replace the side pad Assembly L or R if necessary side pad 3 Check the surface of the roller pickup for foreign mat 3 Clean with soft cloth dampened with IPA Isopropvi ter Alcohol or water 4 If the paper feeds into the printer rand Jam 0 occurs 4 Replace the SMPS HVPS or Sensor perform Engine Test Mode Feed Sensor Test 6 4 Service Manual Samsung Electronics Troubleshooting 6 2 3 JAM 1 BIN PATH e Description 1 Recording paper is jammed in front of or inside the fuser 2 Recording paper is stuck in the discharge roller and in the fuser just after passing thr
33. at all or the low speed of printing occurs due to wrong setup of the environment rather than malfunction of the printer itself Check and Cause Solution 1 Secure more space of the hard disk 1 Not working with the message insufficient printer memory means hard disk space problem rather than the RAM problem In this case provide more space for the hard disk Secure more space using the disk utilities program ie 2 Printing error occurs even if there is enough space in The connection of the cable and printer port is not the hard disk proper Check if the connection is properly done and if the parallel port in CMOS is rightly set up ao 3 Check the parallel port related items in the CMOS As a printer port Select ECP or SPP among Setup SPP Normal ECP and EPP modes increase print ing speed SPP normal mode support 8 bit data transfer while ECP Mode transfer the 12 bit data 4 Reboot the system to print A If the regular font is not printing the cable or the printer driver may be defective Turn the PC and printer off and reboot the system to print again If not solved double click the printer in my computer If the regular fonts are not printed this time again the cable must be defective so replace the cable with new one Service Manual Samsung Electronics Troubleshooting 6 4 3 Abnormal Printing The printing is not working properly even when the cable has no problem even after
34. cable must be defective so replace the cable with new one Service Manual 6 33 Samsung Electronics Troubleshooting 6 10 3 Abnormal Printing c Description Printing does not work even after replacing the cable Printer does not work at all or strange fonts are printed Check and Cause Solution 1 Set up the parallel port using CMOS SETUP 2 Printer Driver Error 3 Error message insufficient memory The printing job sometimes stops due to insufficient virtual memory this is caused by insufficient space on the hard disk 1 ye ee Ensure that ECP best or SPP is selected in the CMOS BIOS setup Ensure that the correct driver is loaded Use the driver supplied on the CD or downloaded from the Samsung web site DO NOT use the Microsoft driver supplied with the Windows operating system If the printer is a GDI or SPL type printer ensure that ALL OTHER GDI or SPL drivers are uninstalled as Windows allows only 1 of this type of driver to be loaded Delete any unnecessary files to secure enough space on the hard disk and start the print job again EI Service Manual Samsung Electronics Troubleshooting 6 10 4 SPOOL Error SPOOL simultaneous peripheral operations online is the process Windows uses to e Description ready to accept them manage print jobs Jobs are processed and then stored on the hard disk until the printer is Check and Caus
35. fire and shock risks 8 Ensure that the power sockets and plugs are not cracked or broken in any way Any such defects should be repaired immediately Take care not to cut or damage the power cable or plugs when moving the machine 9 Use caution during thunder or lightening storms Samsung recommend that this machine be disconnected from the power source when such weather conditions are expected Do not touch the machine or the power cord if it is still connected to the wall socket in these weather conditions 10 Avoid damp or dusty areas install the printer in a clean well ventilated location Do not position the machine near a humidifier Damp and dust build up inside the machine can lead to overheating and cause a fire 11 Do not position the printer in direct sunlight This will cause the temperature inside the printer to rise possibly leading to the printer failing to work properly and in extreme conditions could lead to a fire 12 Do not insert any metal objects into the machine through the ventilator fan or other part of the casing it could make contact with a high voltage conductor inside the machine and cause an electric shock KA Service Manual Samsung Electronics Precautions 1 2 3 Handling Precautions The following instructions are for vour own personal safetv to avoid injurv and so as not to damage the printer 1 Ensure the printer is installed on a level surface capable of supporting its weight Failure to do
36. fixes toner to the paper using pressure and heat to complete the printing job 3 1 4 1 Temperature Intercepting Device Thermostat The thermostat is a temperature sensing device which cuts off the power to the heat lamp to prevent overheating fire when the heat lamp or heat roller overheats 3 1 4 2 Temperature Detecting Sensor Thermistor The Thermistor detects the surface temperature of the heat roller this information is sent to the main processor which uses this information to regulate the temperature of the heat roller 3 1 4 3 Heat Roller The surface of the Heat Roller is heated by the Heat Lamp As the paper passes between the Heat and Pressure rollers the toner is melted and fixed permanently to the paper The surface of the roller is coated with Teflon This ensures that toner does not adhere to the roller surface Ea Service Manual Samsung Electronics Svstem Overview 3 1 4 4 Pressure roller The Pressure Roller mounted under the heat roller itis made of a silicon resin and the surface of the roller is coated with Teflon This ensures that toner does not adhere to the roller surface 3 1 4 5 Safetv Features e To prevent overheating 1st protection device Hardware cuts off when overheated 2nd protection device Software cuts off when overheated 3rd protection device Thermostat cuts off mains power to the lamp e Safety device Fuser power is cut off when the front cover is opened LSU power is cut off when
37. gt 1st level 2nd level 3rd level Default Value RETURN 4 RETURN left right amp amp Enter p 5 Fax Setup only SCX 4521F 4 Default Change p 6 Fax Feature only SCX 4521F 4 Delay Fax p 7 Advanced fax only SCX 4521F 8 Reports 4 Phone Book p 9 Sound Volume 4 Speaker p 14 character Default Change left right amp amp Enter Resolution Standard Fine Super Fine Photo Color Standard Ring to Answer 1 7 2 Darkness Light Normal Dark Normal Redial Term 1 15Min 3minutes Redials 1 13times 7times MSG Confirm On Off On Error On Error Image TCR On Off Auto Report On Off Auto Reduction On Off Discard Size 0 30mm Receive Code 0 9 DRPD Mode set Receive Mode Delay Fax Fax Tel Ans Fax DRPD Priority Fax Add Page Cancel Job Send Forward RCV Forward Start Time End Time Print Local Copy Junk Fax Setup Fax Secure Receive On Off Print Prefix Dial FAX xxxxx 5 digits Stamp RCV Name On Off ECM Mode Phone Book only SCX 4521F Sent Report only SCX 4521F RCV Report only SCX 4521F System Data Scheduled Jobs only SCX 4521F MSG Confirm only SCX 4521F Junk Fax List only SCX 4521F Speaker On Off On Off Comm Ringer Off Low Med High
38. printer cable is directly connected to periph eral devices 1 2 ao 4 Check the power of the printer and perform the Self Test If the test printing works that means no prob lems in the printer itself If the test printing does not work that means bad functioning of the printer not because of software Replace the printer cable If the problems not solved even after the cable replaced check the amount of the remaining toner Check if the connection between PC and printer port is proper If you use windows check if the printer dri ver in the controller is set up If the printer driver is properly set up check in which program the printing is not working The best way to find out is to open the memo pad to check the function of printing If it is not working in a certain program adjust the setup the program requires Sometimes the printout is normal within the Windows basic programs but it s not work ing in a particular program In such case install the new driver again If not working in the Windows basic program Check the setup of the port of CMOS is on ECP And check the address of IRQ 7 and 378 If the scanner needs to be connected to the printer first the remove the scanner from the PC to see if the printer is properly working alone ga Service Manual Samsung Electronics Troubleshooting 6 4 2 The printer is not working 2 U Description After receiving the printing order no response
39. register value of the FAX modem chip Tx and Rx path is almost directly connected to the impedance matching transformer of the LIU Adjust Tx Level within Setting Level 0 2dB range Adjust Rx Level that has the same level as the TIMS out level if possible and must not exceed the TIMS out level 3 Speaker Driving Part Analog Switch MC14053BD makes a path for FAX Tone Ring Key click sound and Analog MUX MC14051 makes a different signal level so that the the Speaker driver chip MC34119 can driving the Speaker with different sound volume Service Manual Samsung Electronics Svstem Overview 3 2 4 Printing Process Part Printing Process part is made of PC Interface part PVC Priter Video Controller LSU control part High Voltage control part and Fuser Unit control part PC interface core is included in the Chorus2 ASIC and controls the PC interface LSU control part controls the LSU polvgon motor Laser diode video data output so thatthe printing image can be made up on the OPC Drum 3 2 5 Line Interface Part Line interface part helps the machine connect to the PSTN or PABX Line and is made of almost primary circuit Its main function is Line connection Line state monitoring and TAD interface that enables a extension telephone or TAD machine to connect to the SCX 4521F machir OPC Drum 3 2 Photo Diode 1 Feeding Type MP Cassette i ype 2 Feeding Standard Center Loading ji Feeding Qtv Casset
40. replacement parts There are no user serviceable parts inside the printer Do not make any unauthorized changes or additions to the printer these could cause the printer to malfunction and create electric shock or fire hazards 3 Laser Safety Statement The Printer is certified in the U S to conform to the requirements of DHHS 21 CFR chapter 1 Subchapter J for Class 1 1 laser products and elsewhere it is certified as a Class laser product conforming to the requirements of IEC 825 Class laser products are not considered to be hazardous The laser system and printer are designed so there is never any human access to laser radiation above a Class level during normal operation user maintenance or prescribed service condition Warning gt gt Never operate or service the printer with the protective cover removed from Laser Scanner assembly The reflected beam although invisible can damage your eyes When using this product these basic safety pre cautions should always be followed to reduce risk of fire electric shock and injury to persons CAUTION INVISIBLE LASER RADIATION WHEN THIS COVER OPEN DO NOT OPEN THIS COVER VORSICHT UNSICHTBARE LASERSTRAHLUNG WENN ABDECKUNG GE FFNET NICHT DEM STRAHL AUSSETZEN ATTENTION RAYONNEMENT LASER INVISIBLE EN CAS D OUVERTURE EXPOSITION DANGEREUSE AU FAISCEAU ATTENZIONE RADIAZIONE LASER INVISIBILE IN CASO DI APERTURA EVITARE L ESPOSIZIONE AL FASCIO PRECAUCION RADIACION LASER
41. so could cause the printer to tip or fall 2 The printer contains manv rollers gears and fans Take great care to ensure that vou do not catch vour fingers hair or clothing in anv of these rotating devices 3 Do not place anv small metal objects containers of water chemicals or other liquids close to the printer which if spilled could get into the machine and cause damage or a shock or fire hazard 4 Do not install the machine in areas with high dust or moisture levels beside on open window or close to a humidifier or heater Damage could be caused to the printer in such areas 5 Do not place candles burning cigarettes etc on the printer these could cause a fire 1 2 4 Assembiv Disassembiv Precautions Replace parts carefully always use Samsung parts Take care to note the exact location of parts and also cable routing before dismantling any part of the machine Ensure all parts and cables are replaced correctly Please carry out the following procedures before dismantling the printer or replacing any parts 1 Check the contents of the machine memory and make a note of any user settings These will be erased if the mainboard is replaced 2 Ensure that power is disconnected before servicing or replacing any electrical parts 3 Disconnect printer interface cables and power cables 4 Only use approved spare parts Ensure that part number product name any voltage current or temperature rating are correct 5 When re
42. the cable is replaced If the printer won t work at all or the strange fonts are repeated the printer driver may be defec tive or wrong setup in the CMOS Setup e Description 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 Check the printer in My Computer to see if the printer driver is compatible to the present driver or delete the old driver if defective and reinstall the new driver 3 Error message from insufficient memory 3 Delete the unnecessary files to secure enough The printing 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 insuffi cient space of the hard disk ga Service Manual Samsung Electronics Troubleshooting 6 4 4 SPOOL Error To spool which stands for simultaneous peripheral operations online a computer document or e Description task list or job is to read it in and store it usually on a hard disk or larger storage medium so that it can be printed or otherwise processed at a more convenient time for example when a printer is finished printing its current document Check and Cause Solution 1 Insufficient space of the hard disk in the directory assigned for the basic spool 2 If the previous printing error not solved 3 Wh
43. the developer cartridge replace the developer and trv to print out 6 5 8 Background e Description Light dark background appears in whole area of the printing Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer iI Check and Cause Solution 1 Does character exist less than 2 per a page and hasn t it been used long time 2 Does recycle paper be used 3 Has the life span of the developer ended 4 Is the movement Up and Down of the transfer roller smooth 5 Is the HVPS normal 1 The toner cartridge is basically designed to print 3 000 sheets with 5 image 2 The B S is not guaranteed if using recycle paper 3 Replace the developer when the life span of it has been ended 4 Clean the bushing part of the transfer roller 5 If the problem is still not solved replace the developer Samsung Electronics Service Manual gg Troubleshooting 6 5 9 Ghost 1 Description Ghost occurs at 75 5 mm intervals of the OPC drum in the whole printing Digital Printer Digital Printer Digital Printer WILUG G Check and Cause Solution 1 Bad contacts caused by contamination from toner particles between high voltage terminal in the main body and the elec trode of the Developer 2 Bad contacts caused by contamination from toner particles between high voltage terminal in the main body and the on
44. the front cover is opened The temperature of the fuser cover s surface is maintained at less than 80 C to protect the user anda caution label is attached where the customer can see it easily when the rear cover is opened Service Manual EI Samsung Electronics Svstem Overview Case part figure STACKER COVER M_MIDDLE COVER M_JAM COVER M SIDE R EXTEND SMALL EXTEND LARGE COVER M_REAR AW BKT SPEKER COVER M_DEVE COVER M SIDE L TRAY CASSETTE Scan part figure CIS i E 3 n z l Y EA f EA TIMING A 3 4 Service Manual Samsung Electronics Svstem Overview 3 2 Engine H W Specification 1 Recording Method LSU Laser Scanning Unit 2 Printing Speed 20ppm In continuing printing base Letter printing pages from 2nd to last during 1min 3 Recording Densitv 600 dpi 4 Cassette Capa Cassette 150Osheets 75g ni Base 1 sheet Feeding N A DRIVE Selection Paper OHP Envelop 1 sheet 5 Manual Tray All paper 1 sheet 6 Paper Size Cassette Manual Width 76 216mm Length 125mm 356mm 7 Effective recording size A4 202 x 291 mm Letter 208 x273mm Legal 208 x 350 mm Folio 208 x 325 mm TopMargin 2 2 mm Left Right Margin 2 2 mm 8 CRU Toner Cartridge Life 3 000pages Printing A4 ISO 5 Pattern Printing 9 First Print Out Time within 11sec Standby 10 Warming up time within 35sec Ambient 2
45. the jp button to move the cursor to skip the position Press Enter when the name on the display is correct To return to Standby mode press Stop Clear Service Manual Samsung Electronics Alignment and Adjustments 4 2 3 3 Setting the Date and Time When vou turn vour machine on for the first time the displav prompts vou to enter the current date and time After entering it will not appear anvmore For the SCX 4521F all of vour faxes will have the date and time printed on them NOTE If power to the machine is cut off you need to reset the correct time and date once the power has been restored 1 Press Menu until Machine Setup appears on the top line of the display Press the scroll button 4 or b to display Date 8 Time on the bottom line and press Enter Enter the correct time and date using the number keypad For the SCX 4321 press the scroll button lt or p to enter the time and date Month 01 12 Day 01 31 Year requires four digits Hour 01 12 12 hour mode 00 23 24 hour mode Minute 00 59 NOTE The date format may differ from country to country You can also use the scroll button lt or p to move the cursor under the digit you want to correct and enter a new number For the SCX 4321 you can use Enter or Upper Level to move the cursor 4 To sel ect AM or PM for 12 hour format press the or button or any number button F
46. to be upgraded Several faxes can be upgrade at the same time In this case enter each fax number 3 When the enter button is pressed the set sends the firmware file by calling designated fax number Around 10 15 minutes are needed to send the file lt Caution gt 1 The Sending and Receiving fax machines MUST be the same model 2 The sending fax must be set up in ECM mode and the Receiving fax memory must be 100 If not the function will not work 4 11 Service Manual Samsung Electronics Alignment and Adjustments 4 2 5 Machine Test SWITCH TEST Use this feature to test all kevs on the operation control panel The result is displaved on the LCD window each time you press a key MODEM TEST Use this feature to hear various transmission signals to the telephone line from the modem and to check the modem amplifier and speaker If no transmission signal sound is heard it means the modem part of the main board amplifier speaker or speaker harness is faulty DRAM TEST Use this feature to test the machine s DRAM The result appears in the LCD display If all memory is working normally the LCD shows lt lt O K gt gt ROM TEST Use this feature to test the machine s ROM The result and the software version appear in the LCD display e FLASH VER 1 00 V e ENGINE VER 1 00V PATTERN TEST Using this pattern printout you can check that the printer mechanism is functioning properly This function is for factory manu
47. to open the printer trays covers and allow for proper ventilation see diagram below e 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 114 Service Manual Samsung Electronics Reference Information 11 4 Sample Tests Patterns The sample patterns shown below are the standard test patterns used in the factorv 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 x LMNOPQRSTUVW HIJ KLMNOPQRSTUVWXVZO1 23456789ABCDEFGHIJKI BCDEFG Stephen J Singel Labanda Sinpat Abarress Tendar BSF L S URANGLE Funtres Solber Netener 23 January 2004 Jonathan Q Maderia Inpert Mampem Abaress 2343 Stantin Dawer Lank Benhibe SDF Mr Maderia Nam liber tempor cum soluta nobis eleifend ption cogue nihil consequat velillum Dolore eu zril feugiat nulla acilisis at vero eros accumsan et iusto odio dignis sim qui blandit praesent lutatum ril lobortis nisl ut aliquip exea commodo consequat Duis autem vel eum ireurg dolor in hendreritin vulputate velit esse molestie tincidunt ut laoreet dolore magna aliquam erat a volutpat Ut wisi en
48. using a different sending fax machine preferably from the same wall socket 3 Check the cable between the set and the wall socket for damage 1 If you can hear a noisy line when using on hook dial replace or repair the telephone line 2 Replace LIU 3 Replace the line cord EI Service Manual Samsung Electronics Troubleshooting 6 6 5 Defective FAX RECEIVE 1 Description FORWARD is functioning but RECEIVE is not functioning or the received data is corrupt i Check and Cause Solution 1 Check if there is a NOISE line bv pressing on hook dial and listening 2 Use a different fax machine to receive from the same sender if possible on the same wall socket 6 6 6 Defective FAX RECEIVE 2 1 If you can hear a noisy line when using on hook dial replace or repair the telephone line 2 Replace the LIU Description Received data are lengthened or cut in the printing Check and Cause Solution 1 Check if there is a NOISE line by pressing on hook dial and listening 2 Ask sender to send to another fax machine if possible connected to the same wall socket 6 6 7 Defective FAX RECEIVE 3 1 If you can hear a noisy line when using on hook dial replace or repair the telephone line 2 Replace LIU or main PBA in sequence e Description The phone is ringing continuously but it set does not answer the call Check and Cause Solution Che
49. voltage is input and get feed back current and recalculate it to resistance Control method on transfer output voltage It is controlled by changing its duty of THVPWM Signal as follows 10 Duty 500V 90 Duty 5000V b Charge Voltage MHV Input Voltage 24 V DC 15 10 21 6V 27 6V Out Voltage 1300KV 2 50V 50M6 Load Out Voltage Rising Time 50 ms Max Out VoltageFalling Time 5OmsMax Out Voltage Range 30 MQ 1000 ic Output Control SignaliMHV PWM Active Low PWM signal for controlling MHV ga Service Manual Samsung Electronics Svstem Overview c Developing Voltage DEV Input Voltage 24V DC 15 10 21 6V 27 6V Output Voltage 350V 20V 50 oLoad Output Voltage Fluctuation range PWM Control Input contrast of the output stability degree 5 orless Loading contrast 5 orless Output Voltage Rising Time 50 ms Max Output Voltage Falling Time 50 ms Max Output Loading range 10491000 MQ Output Control Signal BIAS PWM Active Low PWM signal for controlling MHV d Supply Output Voltage 550V 50V 5019 Load Input contrast of the output stability degree under 5 Loading contrast 5 orless Output Voltage Rising Time 50 ms Max Output Voltage Falling Time 50 ms Max Output Loading range 10 MQ 1000 MQ Output Control Signal BIAS PWM Active Low PWM signal for controlling MHV 3 7 FUSER AC POWER CONTROL The Fuser HEAT LA
50. 1 01166A BRACKET P SUS BLADE ML 1610 SPCC NI 1 2T SNA PLATE M DEVE_L ML 1610 PC 2 62 4 88 BLK SNA SNA SA Parts List SA SERVICE AVAILABLE SNA SERVICE not AVAILABLE DNA DELIVERY not AVAILABLE BLADE P SUS ML 2010 SUS301 CSP 1 2H T0 0 SNA N A_ JC62 00146GAJSEAL SUPPORT L ML 1610 MICRO URETHANE SNA SNA SNA N A __ JC62 00154A SEAL OPC CLEAN L ML 1610 PTFE FELT URETH SNA SNA SNA HANDLE M DEVE ML 1610 HIPS T1 5 110 125 SNA N A_ JC66 00310A GEAR AGITATOR 2 SCX 5100 POM M90 44 0 6 SNA SNA SNA SLIDER M_CIS R SCX 4521F POM 3 13 5 37 4 SNA N A_ JC67 00082A CAP M HOUSING DEVE ML 1610 ABS 11 5 62 5 SNA CAP M WTB ML 1610 ABS T1 5 29 250 3 BLK SNA LABEL P WARNING COMMON SEC ART100G 65 SNA N A __ JC70 00501A ELECTRODE P DEVE KEY ML 1610 SUS304CSP1 SNA SNA SNA PMO BUSHING DEV ML 5000 POM NTR SNA N A __ JC73 10017A RPR SEAL_BLOCK ML 80 POLYURETHANE FOAM T SNA MEC GEAR OPC R SF 5100 SEC BLK SNA SNA N A __ JC97 01900B MEA UNIT AGITATOR_B ML 1610 SEC SKYLARK SNA SNA SA sh N A 1003 001102 IC MOTOR DRIVER TEA3718DP DIP 16P 300MIL SA SA R CHIP 0ohm 5 1 4W TP 3216 SA R CHIP 2200hm 5 1 10W TP 1608 SA N A 2011 000660 R NET 1Kohm 596 1 16W L CHIP 8P TP 3 2x1 SA C CER CHIP 0 047nF 5 50V COG 1608 SA SA RESONATOR CERAMIC 7 37MHz 0 596 TP 4 7x4 SNA N A_ 13301 001413 CORE FERR
51. 284 is comprised in the Chorus2 Main Controller ASIC and Image processor and CIS Interface part is comprised in the Chrous2 too Modem chip FM336 which make a function of FACSIMILE can the machine communicate with the other FAX machine on the speed of 33 6Kbps and the LIU Line Interface Unit supports the line connection with PABX or PSTN line Power part which made of two part SMPS and HVPS supplies Voltage source to the controller part and high voltage to the printing image developing process 1 Engine H W Specification 1 Recording Method LSU Laser Scanning Unit 2 Printing Speed 16ppm In continuing printing base A4 printing pages from 2nd to last during 1min 3 Recording Density 600 dpi 4 Cassette Capa Cassette 150sheets 75g m Base 1 sheet Feeding N A DRIVE Selection Paper OHP Envelop 1 sheet 5 Manual Tray All paper 1 sheet 6 Paper Size Cassette Manual Width 76 216mm Length 125mm 356mm 7 Effective recording size A4 202 x 291 mm Letter 208 x 273 mm Legal 208 x 350 mm Folio 208 x 325 mm Top Margin 2 2 mm Left Right Margin 2 2 mm 8 CRU Toner Cartridge Life 3 000pages Printing A4 ISO 5 Pattern Printing 9 First Print Out Time within 11sec Standby 10 Warming up time within 35sec Ambient 25 C wo 2 Main Board Control Part Main control part of SCX 4517F is made of ASIC CPU Image processor PC I F part include Scan interf
52. 3KOHM 5 1 8W AA TP 1 8X3 2MM SA R CARBON 30KOHM 5 1 4W AA TP 2 4X6 4MM SA R CARBON 30KOHM 5 1 8W AA TP 1 8X3 2MM SA R METAL OXIDE S 15Kohm 5 1W AA TP 3 3x SA N A___ 2004 000284 R METAL 12Kohm 1 1 4W AA TP 2 4x6 4mm SA R METAL 1Kohm 1 1 4W AA TP 2 4x6 4mm SA R METAL 2 74Kohm 1 1 4W AA TP 2 4x6 4 SA R METAL 120hm 1 1 4W AA TP 2 4x7mm SNA Parts List SA SERVICE AVAILABLE SNA SERVICE not AVAILABLE DNA DELIVERY not AVAILABLE R WIRE WOUND NON 0 220hm 5 2W AA BK 4x1 SA N A 2201 000021 C CERAMIC DISC 100NF 80 20 50V Y5V TP DNA SA C CERAMIC DISC 1 0NF 80 20 500V Y5V TP SA C CERAMIC DISC 1 0NF 80 20 50V Y5V 1P 4 SA N A 2201 002127 C CERAMIC DISC 0 47NF 10 250V Y5P TP 8 SNA SA SA C FILM LEAD PEF 15NF 10 400V BK 10 5X4X SNA N A 2305 000385 C FILM LEAD PEF 470nF 10 250V BK 18x6x1 SA SA SA C AL 1UF 20 50V GP TP 5X11 2 SA N A 2401 000651 C AL 2 2uF 2096 50V GP TP 4x7 5 SA SA SNA C AL 470nF 209 50V GP TP 4x7 5 SA N A 2801 001136 CRYSTAL UNIT 18 75MHZ 20PPM 20PF 700HM SNA SNA SNA CRYSTAL UNIT 28 224MHz 50ppm 28 AAA 1 8pF SA N A 3301 000344 BEAD RADIAL 2000hm 3 5x0 6x6 5mm 7000mA SNA SA SA N A 3708 001408 CONNECTOR FPC FFC PIC 12P 1MM STRAIGHT S SA SNA SNA N A HEADER BOARD TO CABLE BOX 7P 1R 2mm STRA SNA N A 3711 002812IHEADER BOARD TO CABLE BOX 11P 1R
53. 5 C 3 2 1 Main Board Control Part Main control part of SCX 4521F is made of ASIC CPU Image processor PC I F part include Scan interface part FAX Modem part and Printing process I F part CPU handles the BUS control I O interface scan interface PC interface and other miscellaneous driver circuit 1 Main Board Main Board has a function of sending Current Image Video Data to LSU of the machine controlling motor Driving Circuit and monitoring Paper Exit Sensor Cover Open switch OPE Panel Inputs 2 Main Controller CPU Chorus2 is the main CPU and is made up on the 16 32bit RISC architecture using ARM7TDMI core Main CPU controls the whole system according to the program code which stored in the Flash ROM memory Summary of the Key Function Block 1 8V for internal Core 3 3V for I O Pad with 4KByte Cache Image Processor included On Chip clock generator with PLL Memory and External Bank Control DMA Control 5 Channel Interrupt Control 2 port USB Host 1 port USB device ver 1 1 interface control Parallel interface control UART 2 Channel Service Manual Ea Samsung Electronics Svstem Overview Synchronous Serial Interface Control A D Converter 10 bit 2channel General I O Port control Tone Generator RTC with calendar function SW Assistant function Rotator Flash Memory Stores system program and can be updated to the newer system program code through the PC
54. 600 600 dpi Scan Width 208mm Function White Shading Correction Gamma Correction CIS Interface 256 Gray Scale EJ Service Manual Samsung Electronics Svstem Overview 3 CIS Driving Part CIS Supply Voltage 3 3V CIS Max frequency 5MHz ClSLinetime Fax Copy 1 5ms PC Scan 4 5ms White output volt Max 0 8V 4 ADF Driving Part Driving ADF Stepper motor and the maximum motor speed is 2000PPS MOTOR DRIVER A3978 Allegro Driving Voltage 24V DC Phase 2 2 Phase 2000PPS at Quick Scan 2 2 Phase 1000PPS AT Fine Scan 2 2 Phase 667PPS AT Super Fine Scan 3 2 3 Fax Modem Part 1 Modem Part The modem part is consist of FM336 FAX Modem chip LIU Line Interface Unit and modem analog front end AFE functional part The feature of the FM336 modem chip is as below Communication Mode Half Duplex Modem Method GROUP 3 ITU T V34 V17 V29 V27ter Tonal Signal ITU T T 30 Binary Signal ITU T V 21 T 30 Image Transmission Time 3sec ITU T NO 1 CHART Memory Tx ECM Data Compress MH MR MMR JPEG Modem Speed 33600 28800 14400 12000 9600 7200 4800 2400 bps Receive Level 0 48dBm Output Level Adjustable 6 15dBm 1dBm Step Initial Setting 12dBm Receive dynamic range 0 dBmto 43 dBmfor V 17 V 29 V 27 ter and V 21 9 dBm to 43 dBm for V 34 halfduplex 2 The Gain of the Line signal can be adjusted by setting the
55. 7 7 Samsung Electronics Exploded Views amp Parts List 7 7 Main Frame Assembly Exploded Views 7 8 Service Manual Samsung Electronics Exploded Views amp Parts List 7 8 MP Tray Assembly Exploded Views Service Manual 7 9 Samsung Electronics Exploded Views amp Parts List 7 9 Fuser Unit Exploded Views Service Manual 7 10 Samsung Electronics Exploded Views amp Parts List 7 10 Paper Path Assembly Exploded Views Service Manual 7 411 Samsung Electronics Parts List Service Parts List Model SCX 4521F TEC SA SERVICE AVAILABLE SNA SERVICE not AVAILABLE DNA DELIVERY not AVAILABLE ELA HOU FRAME LOWER SCX 4521F SEC WHITNE SA 7 1 2 JC59 00023AJUNIT LSU ML 1610 16 20PPM 1 LIGHT SO SA SA SA SHIELD P ENGINE SCX 4521F SECC 0 8 306 7 SA 7 1 6 2 JC97 02210A MEA UNIT COVER JAM SCX 4521F SEC JAM C SA SNA SMPS WHITENY V2C SCX 4521F AC DC 2 SA PBA SUB LIU SCX 4521F SEC SERIAL LIU FAX SA 7 1 10 JC39 00410AJCBF HARNESS HVPS SCX 4521F CBF UL1061 26 SA SA SA SPRING ETC HV LARGE ML 6060A SUS 304 WP SA 7 1 13 2 JG70 40912AJICT SHAFT HV LARGE ML 5000A SWCH18A SA SA HVPS SKYLARK 24V 21 6V 27 6V MAX 5KV 7027 SA BRACKE
56. A SMPS 1 Before you remove the Engine Shield you should remove Scan Ass v Refer to the 5 9 Middle Cover Refer to the 5 13 2 Unplug the all Connectors from the SMPS and LIU PBA LIU Cable MP Lo S Cable 3 Remove the six screws securing the Engine Shield and release the Harness as shown below Then carefully release the Engine Shield from the Actuator Feed Sensor Lever n Engine Shield WILIU PBA SMPS Actuator Feed Sensor Lever 4 When if only remove the SMPS first remove the Rear Cover refer to the 5 6 and unplug the Fuser Connector and remove the six screws securing the SMPS Then unplug the Connector from the Main PBA and carefully release the SMPS as shown below 5 When if only remove the LIU PBA first remove the Rear Cover refer to the 5 6 and remove the two screws securing the LIU PBA Then unplug the Connector from the Main PBA and release the LIU PBA as shown below Samsung Electronics Service Manual 5 24 Disassembly and Reassembly 5 19 LSU 1 Before you remove the LSU you should remove Scan Ass v Refer to the 5 9 Middle Cover Refer to the 5 13 2 Remove the three screws securing the LSU and remove it Then unplug the two Connectors from the LSU 5 22 Service Manual Samsung Electronics Disassembly and Reassembly
57. COVER SCX 4521F SEC WHITNEV COVE SNA N A __ JC99 01864Q INA ACESSORY_TEC SCX 4521F TEC IRAN WHIT SNA PAA WOOD MATERIAL A4 SCX 4521F SEC MA SNA PAA LABEL SCX 4521F FR LABEL ASS Y SNA PAA PACKING SCX 4521F SEA PACKING SNA N A___ 0201 001183 ADHESIVE AA ARON ALPHA 202F NTR 100 20G SNA SOLDER WIRE HSE 01 D3 SN 0 5CU 0 03NI SNA SNA TAPE FILAMENT 3M 10 15 W18 L55M TRP SNA N A __ 0203 001100 TAPE OPP MASKING OPP W75 CLR 10 05 W75 L SNA SNA SNA N A __ 0205 000005 GREASE BEARING EP56 DIAMOND HYDRO FLUID SNA SNA SNA DIODE SWITCHING 1N4148 75V 150mA DO 35 T SA N A __ 0402 000129 DIODE RECTIFIER 1N4003 200V 1A DO 41 TP SA SA SA DIODE ZENER MTZJ4 7B 4 59 4 77V 500MW DO SA N A __ 0501 000398 TR SMALL SIGNAL KSC945 NPN 250mW TO 92 T SA SA TR POWER KSB1151 Y PNP 1 3W 1O 126 16 SA TR POWER KSD288 NPN 25W 10 220 120 24 SNA N A __ 0604 000118 PHOTO COUPLER TR 20 300 200mW DIP 4 ST SA SA IC POSI FIXED REG 7812 10 220 3P PLAS SA THYRISTOR SIDAC P3100EB 275V 0 15A 250A SA N A___ 1405 000170 VARISTOR 82V 1200A 9x4 1mm TP SA SA R CARBON S 0 50HM 5 1 2W AA TP 2 4X6 4 SA R CARBON 750HM 5 1 4W AA TP 2 4X6 4MM SA N A __ 2001 000027 R CARBON 1000HM 5 1 4W AA TP 2 4X6 4MM SA R CARBON 2200HM 5 1 4W AA TP 2 4X6 4MM SA SA R CARBON 6800HM 5 1 4W AA TP 2 4X6 4MM SA N A___ 2001 000290 R CARBON 10KOHM 5 1 8W AA TP 1 8X3 2MM SA SA R CARBON 2000HM 5 1 8W AA TP 1 8X3 2MM SA N A___ 2001 000591 R CARBON 3
58. Clear the memory 2 Check that there is an audible key click when a key is pressed 1 Check that the keypad is assembled correctly and the membrane is not damaged replace the membrane or whole keypad assembly if necessary 2 If the fault remains replace the OPE Ass v and the Main board in sequence I Service Manual Samsung Electronics Troubleshooting 6 3 3 Fuser gear melts due to overheating causing Paper Jam Constant Jam where paper is entering Fuser unit Fuser rollers do not turn e Description Check and Cause Solution 1 Check the Heat Lamp thermostat and thermistor 1 Use Engine Test Mode to test the Fuser THERM ADC 120 Replace Fuser unit Replace SMPS or Main PBA as appropriate 6 3 4 Paper Empty e Description Paper Empty is displayed in the LCD panel even when paper is loaded in the cassette Check and Cause Solution 1 Deformed paper sensor actuator or faultv 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 Faultv cables or connectors 6 3 5 Paper Emptv without indication e Description The paper empty message does not appear in the LCD when the paper cassette is empty Check and Cause Solution 1 Deformed paper sensor actuator or faultv sensor 1 Replace the defective actuator 2 SMPS PBA or Main PBA is defective 2 Replace the SMPS PBA or MAIN PBA as ap
59. DRAM is used for Print Buffer Scan buffer when scanning ECM Buffer when FAX Receiving and svstem working memorv Capacitv 16 Mbvte Access Time 66MHz based on system bus clock Data Backup 48 Hours Backup Batterv Charging Time 100hours when completelv discharged 3 Scan Part 1 Image Signal Input Part Image Signal from CIS has a level of about 1 2V and is goes to ADC of Chorus2 After ADC CIS analog signal will be converted to 8 bit Digital signal 2 Image Processing On the surface of the original paper the light from the CIS LED reflected and goes to the CIS Sensor Then the light is converted to the appropriate voltage suitable for ADC input Analog signal from CIS sensor is used for ADC input then is converted to 8 bit digital data Image processor of the Chorus2 will do the Shading correction function at first then Gamma correction function next After then the data goes to different module according to the copv or FAX resolution mode When Text mode the image data goes to LAT module when Photo mode the image data goes to Error Diffusion module when PC Scan mode the image data goes directly to the PC through DMA access lt Summary of the Image sensor interface is as below Minimum Scan Line Time 1 5ms B Scan Resolution 600 600 dpi Scan Width 208mm function White Shading Correction Gamma Correction CIS Interface 256 Gray Scale 3 CIS Driving Part CIS Supply Voltage 3 3V CIS
60. Enlarge Select ZOOM ratio when copy No of Copies Select the number of copies Original Type Change Copy Modes Text Text Photo Photo 3 Copy Darkness change the Darkness of the Copied image Light Normal Dark Select one of the predefined Copy Template templates i itii u STANDARD gt FINE gt SUPER FINE gt PHOTO gt COLOR Phone Book Search the user defined Phone number 4 Fax Brsadeaaing When sending FAX data to many place in the same time On Hook Dial On Hook Dial Redial Pause Last number Redial Pause 5 Sean ee select scan ie PC peal to FAX scan to E mail function 3 LCD Part Number of Characters 16 Characters x 2 line gt Clock Date display gt System Status display gt Alarm Error Message display gt Function Dialog Message display Troubleshooting 6 Troubleshooting 6 1 Checking Symptoms Before attempting to repair the printer first obtain a detailed description of the problem from the customer No Power Power Module error Main PBA error LCD Panel error Refer to Error Massage lt Chapter 4 4 gt Refer to Solution of Image Problem Service Manual CI Samsung Electronics Troubleshooting 6 1 1 Basic Check List 1 Check the Power J e Does Warming Up appear on the display gt If not check power cable switch or SMPS gt Does the wall socket work Do the Motors or other components initialize listen for main motor fa
61. ITE AD 33x12x7mm 1500 2800Gauss SA SA SNA SA N A_ JBE6 00103AJGEAR ADF 38 SCX 1110F POM DELIN500P 0 6 SA SA SA LABEL R DOUBLE CORE COMMON COMP SNA N A_ IJB70 00070AJIPR WASHER WAVE SF 4750C SUS301 0 1T SA ICT PIN ADF SCX 1110F STS303 D2 0 10001 SA SA PMO ADF COLAR SCX 1110F POM NTR SA N A_ JB72 00844AJPMO WHITE CLUTCH SUB 29 SCX 1110F POM F2 SA SA SNA BRACKET P CLEANING ML 1610 SECC 1 2T 2 SNA N A_ JC62 00002A HEAT SINK 4500 ML 4500 BRONZE 0 5 9 3 SA GEAR OPC R SF 5100 POM M90 44 BLK MO 6 SA SA NPR EARTH OPC APOLLO SF 5100 C5210P H 0 SNA N A _ JC72 00081A PMO BUSHING AGI L SF 5100 POM BLK SNA PMO COVER ADF SCX 5100 HIPS WHT HB SA SNA PMO AGITATOR_DOUBLE ML 6060 ABS GF20 BL SNA N A_ JC72 10924AJPPR FILM AGITATOR ML 5000 PET 10 1 NTR SA SNA SA N A_ 1JC73 40906AJRMO SEAL AGITATOR ML 5000 SANTOPRENE SNA SNA R CARBON 1500HM 5 1 4W AA TP 2 4X6 4MM SA N A 2001 000429 R CARBON 1KOHM 5 1 8W AA TP 1 8X3 2MM SA R CARBON 3000HM 5 1 4W AA TP 2 4X6 4MM SA R CARBON 56KOHM 5 1 8W AA TP 1 8X3 2MM SA SNA N A 2201 000119 C CERAMIC DISC 100NF 80 20 50V Y5V TP SA C CERAMIC DISC 0 022NF 5 50V SL TP 5X3M SA SNA C CERAMIC MLC AXIAL 1 00nF 10 50V X7R TP SA Parts List SA SERVICE AVAILABLE SNA SERVICE not AVAILABLE DNA DELIVERY not AVAILABLE SEC Code Description amp Specification Location Service N A 2401 002300 C AL 47uF 20 50V GP TP 6 3x11
62. IVISIBLE CUANDO SE ABRE EVITAR EXPONERSE AL RAYO ADVARSEL USYNLIG LASERSTR LNING VED BNING NR SIKKERHEDSBRYDERE ER UDE AF FUNKTION UNDG UDSAETTELSE FOR STR LNING ADVARSEL USYNLIG LASERSTR LNING N R DEKSEL PNES STIRR IKKE INN I STR LEN UNNG EKSPONERING FOR STR LEN VARNING OSYNLIG LASERSTR LNING N R DENNA DEL R PPNAD OCH SP RREN R URKOPPLAD BETRAKTA EJ STR LEN STR LEN R FARLIG VARO AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALTTIINA N KYM TT M LLE LASER S TEILYLLE L KATSO S TEESEEN PSB TLE UAAR 01 HHH SE HONRA E e2 FAKAS Service Manual a Samsung Electronics Precautions 1 2 Caution for safetv 1 2 1 Toxic material This product contains toxic materials that could cause illness if ingested 1 If the LCD control panel is damaged it is possible for the liquid inside to leak This liquid is toxic Contact with the skin should be avoided wash any splashes from eyes or skin immediately and contact your doctor If the liquid gets into the mouth or is swallowed see a doctor immediately 2 Please keep toner cartridges away from children The toner powder contained in the toner cartridge may be harmful and if swallowed you should contact a doctor 1 2 2 Electric Shock and Fire Safety Precautions Failure to follow the following instructions could cause electric shock or potentially cause a fire 1 Use only the correct voltage failure to do so could damage the printer and potentially
63. In Standby mode redials the last number or in Edit Redial Pause mode inserts a pause into a fax number On Hook Dial Engages the telephone line Allows you to access a list of your PC software programs that an image can be scanned to You Scan to must create the scan list using the Samsung software Printer Settings Utility provided with this machine For details see Software User s Guide Allows you to save on toner by using less toner to Toner Save l print a document S c A N 7 S A V E 4 15 Service Manual Samsung Electronics Alignment and Adjustments 4 3 2 Control Panel Functions SCX 4321 SAMSUNG Start Stop Clear SCX 4321 Adjusts the brightness of the documents for the Darkness f current copy job Original Type Selects the document type for the current copy job No of Copies Selects the number of copies Reduce Enlarge Makes a copy smaller or larger than the original Allows you to use one of the special copy features such as Clone Collation Auto Fit 2 Sides on 1 page 2 4 Up multiple pages on a sheet and Poster copying after assigning it Displays the current status and prompts during an ma operation Favorite Copv Uses to scroll through the available options for the selected menu item Enter Confirms the selection on the display Menu Enters Menu mode and scrolls through the menus availa
64. MM SA pej a ROLLER M EXIT MAIN ML 1610 POM 8 5 L23 6 SNA 7 9 18 6107 001163 SPRING CS SUS304 WPB P10 4 D3 9 L13 SA 17 9 19 _ 1404 001337 THERMISTOR NTC 7KOHM 3370K 0 3MWIC SA 7 9 20 _ JC47 00005B THERMOSTAT 150 ML 1610 125 250V 15 10A K4279 SA 7 28 10s6 oo 0aEfoBF HARNESS FUSER 220VjMLTeTO MIRE Hager 7 9 22 JC39 00403BJCBF HARNESS FUSER 220V ML 1610 WIRE HAR SA 7 9 23 ___ JC61 00064A SPRING ETC CLAW ML 5200A SUS 304WPB OO o Boi SA 7 9 24 __ JC61 00584A HOLDER M PLATE CLAW ML 1710 PPS GF40 BT aA Pa PLATE P CLAW ML 1710 SUS304 CSP 0 1 SNA 7 9 26 JC66 00801AJGEAR EXIT DR38 25 ML 1610 POM 0 8 38 25 SNA 17 9 27 _ 6031 001051 WASHER PLAIN M4 ID4 1 0D7 0 10 13 POLY 2004 SNA 17 9 27 1 6031 000023 WASHER PLAIN ID5 9 0D10 0 10 5 BLK POL wo001 SNA Poe oe COVER M GUIDE EXIT SCX 4521F PET GF30 2 SA 7 9 29 JC63 00668A COVER M SAFETY FUSER SCX 4521F PET GF30 SA 17 9 30__ JC66 O0906A LEVER M_ACT EXIT SCX 4521F PC GF205 3 2 SA 17 9 31 JC61 00049A SPRING ETC TR KOR ML 4500 SUS304 WPB 0 SNA aa ae HOLDER M_ACTUATOR SCX 4521F PC GF20 2 0 SA 7 9 33 JC39 00045AJCBF HARNESS THERMISTOR SF 5100 26 UL106 SA 17 9 34 JC66 00816A LEVER M ACTUATOR JAM ML 1610 PC 18 5 6 A1013 SA 17 9 35 JG72 40744A PMO BUSHING TX B4 CF5700 POM NTR WHT DE SA 7 10 1 JC61 01161AJGUIDE M PAPER PATH ML 1610 ABS HB 140 SA LEVER ACTUATOR FEED SENSOR ML 1610 PC SA SA IPR PLATE SAW ML 80 SUS304 CSP 1 2H T0O K3377 SA
65. MP gets heat from AC power The AC power controls the switch with the Triac a semiconductor switch The ON OFF control is operated when the gate of the Triac is turned on off by Phototriac insulting part In other words the AC control part is passive circuit so it turns the heater on off with taking signal from engine control part When the HEATERON signal is turned on at engine the LED of PC102 Photo Triac takes the voltage and flashes From the flashing light the Triac part light receiving part takes the voltage and the voltage is supplied to the gate of Triac and flows into the Triac As a result the AC current flows in the heat lamp and heat is occurred On the other hand when the signal is off the PC102 is off the voltage is cut off at the gate of Triac the Triac becomes off and then the heat lamp is turned off 1 Triac feature 12A 600V SWITCHING 2 Phototriac Coupler PC102 Turn Onlf Current 15mA 50mA Design 16mA High Repetive Peak Off State Voltage Min 600V Service Manual Samsung Electronics Disassembly and Reassembly 5 Disassembly and Reassembly 5 1 General Precautions on Disassembly When you disassemble and reassemble components you must use extreme caution The close proximity of cables to moving parts makes proper routing a must If components are removed any cables disturbed by the procedure must be restored as close as possible to their original positions Before removing
66. NA DELIVERY not AVAILABLE CUSHION MAIN SCX 4521F EPS 195 466 502 SA N A_ JC72 01001A PMO SUB STACKER ML 1400 PC 32 4 8 25 5 SA __ N A__ JC94 00835A PHANTOM AU JC92 01684A _ eC O OO oa __ N A__ JC94 00857A PHANTOM AU JC92 01726A_ S O OO oa ELA UNIT DEV KIT 3K SCX 4521F SEC CO SNA N A___ JF68 10532B LABEL P BAR CODE CLP 500 YUPO PAPER 1 SNA SA SNA N A 0205 001059 GREASE BEARING PETAMO GHV 133 BEIGE 15KG SNA SNA SNA DIODE SWITCHING 1SS355 80V 100MA SOD 323 SA N A 0404 000112JDIODE SCHOTTKV RB420D 40V 100MA SOT 23 T SA SA SA TR SMALL SIGNAL KSA1182 Y PNP 150mW SOT SA N A 0501 000342 TR SMALL SIGNAL KSC1623 V NPN 200mW SOT SA SA SA C CMOS LOGIC 7808 AND GATE SOT 25 5 63M SA N A 0801 001056 IC CMOS LOGIC 74VHC32 OR GATE SOP 14P 15 SA SA SNA N A 1001 000170JIC ANALOG SWITCH MC14051BD SPDT CMOS SOP SA SNA SA SA N A 1006 001224 IC LINE TRANSCEIVER 74LVX161284 TSSOP 48 SA SA C DRAM K4S641632 4MX16BIT TSOP II 54P SA C FLASH MEMORY 29LV160 2MX8 1MX16BIT TS SNA N A 1201 000105JIC AUDIO AMP 34119 SOP 8P 150MIL SINGLE SA SNA SA C POSI FIXED REG 1117 DPAK 3P 265MIL P SA N A 1203 002220 IC POSI ADJUST REG LD1117 DPAK 3P 240MI SA SNA SA N A 1205 002339 JIC CLOCK GENERATOR CY25811SC SOIC 8P 150 SA SA SA SA N A 2007 000077 R CHIP 4700hm 5 1 10W TP 1608 SA SA SA R CHIP 4 7Kohm 5 1 10W TP 1608 SA
67. Original Type Selects the document type for the current copy job No of Copies Selects the number of copies Reduce Enlarge Makes a copy smaller or larger than the original Allows you to use one of the special copy features such as Clone Collation Auto Fit 2 Sides on 1 page 2 4 Up multiple pages on a sheet and Poster copying after assigning it Displays the current status and prompts during an O operation Uses to scroll through the available options for the selected menu item lt vo on Favorite Copy Confirms the selection on the display Enters Menu mode and scrolls through the menus available 3 Upper Level Sends vou back to the upper menu level Start Starts a job Stops an operation at anv time In Standbv mode clears cancels the copv options such as the darkness the document tvpe setting the copv size and the number of copies Stop Clear Number Keypad Dials a number or enters alphanumeric characters Service Manual gg Samsung Electronics Alignment and Adjustments Adjusts the resolution of the documents for the Resolution current fax job Broadcasting Allows vou to send a fax to multiple destinations Allows vou to store frequentiv dialed fax numbers as one or two digit speed dial or group dial numbers for automatic dialing and edit the stored numbers Also allows vou to print a Phonebook list Phone Book x gt nO
68. READY state TONER LOW Toner Low When the machine has encountered the Toner Low TONER EMPTY Service Manual Toner Empty When the machine has encountered the Toner Empty Samsung Electronics lt continue gt STATUS LCD Display Descriptions BY PASS JAM Bypass Jam When the machine detected the non feeding from BYPASS Tray GROUP is not available Group Not Available You have tried to select a group location where only a single Location number can be used RETRY REDIAL Retry Redial the machine is waiting for the programmed interval to automatically redial a previously busy station NO NOT ASSIGNED NO Not Assigned The speed dial location you tried to use has no number assigned to it Load document Load Document You have attempted to set up a sending operation with no Document loaded Memory full and canel the job Cancel 1 Yes 2 No When the machine has encountered the memory full during storing the document into memory the machine display the CANCEL to operator whether he she make a decision the canceling the job or accept the scanned page so far to transmit the remained documents Job has not been created Operation Not Assigned When operator is doing in ADD CANCEL operation and There is no job to handle if operator entered the job no Low Heat Error Low Heat Error Temperature could not reach certain
69. S Private FIRE FET JB81 00039A AS USE sav par wegga MEG JB75 00068A MEC CHUTE ASSY Part mgg PBA iman JB92 01131A PBA MAIN CONTROLLER ASSN Par mgg MEA e JB97 01089A MEA UNIT PULLEV IDLE Samsung Electronics Service Manual Exploded Views amp Parts List 7 1 Main Exploded Views SCX 4521F SCX 4321 Service Manual 7 2 Samsung Electronics Exploded Views amp Parts List 7 2 ADF Assembly Exploded Views a6ed x u 0 s N31V1d HSA00 VAN coe 7 3 Service Manual Samsung Electronics Exploded Views amp Parts List 7 3 Platen Cover Assembly Exploded Views Service Manual 7 4 Samsung Electronics Exploded Views amp Parts List 7 4 ADF Platen Assembly Exploded Views ELA HOU OPE see to next page Service Manual 7 5 Samsung Electronics Exploded Views amp Parts List 7 5 OPE Unit Exploded Views SCX 4321 3in1 SCX 4521F 4in1 7 6 Service Manual Samsung Electronics Exploded Views amp Parts List 7 6 Pick Up Unit Exploded Views Service Manual
70. SCX 1150F HIPS WHITE Z5093 SA PMO DOC GUIDE R SCX 1150F HIPS WHITE G2174 SA PMO DOC GUIDE L SCX 1150F HIPS WHITE SA 7 3 6 JF70 10616AJIPR WASHER SPRING CU CF3400 SUS301 CSP SA SA 73 8 JC61 00011A SPRING ETC FEED SF 5100 SUS304WPB 0 6 ISA SA 7 3 10 JG72 40663AJPMO ROLL PINCH SF5500 POM DERLIN 500P B SA 73 11 JC66 00909A SHAFT IDLE FEED SCX 4521F SUS303F 59 5 2 0A 7 3 12 _ JC73 00091ARPR ROLLER EXIT IDLE SCX 5100 POM EPDM TSA SA 7 4 0 JC96 03384AJELA HOU PLATEN SCX 4521F SEC PLATEN AS SA SA SA SA 7 4 1 2 1 JC61 00698A BRACKET M SCAN MOTOR SCX 4216F PC GF10 SA SA SA PMO HOLDER BELT SCX 1110 XRX POM WHT SA 7 4 1 2 5 6044 000125 RING E ID4 0D9 T0 6 PASS STSC SA GEAR IDLE SCX 1110 XRX POM 0 5 31 WHT SA SA SA 7 4 1 4 JC39 00408AJCBF SIGNAL CIS FFC SCX 4521F 12PIN FFC 8 SA SNA SA PMO PULLEY SCX 1110 XRX POM WHT SA 7 4 1 9 JB61 00109AJSPRING ETC BELT SCX 1105 SUS304WPB 00 8 SA SA SA MEA SCAN UPPER SCX 4521F SEC SCAN UPPE SA 7 4 2 1 JC63 00661AJCOVER M SCAN UPPER SCX 4521F HIPS 2 5 43 SA LABEL P SHADING COMMON YOOPO PAPER T0 24177 SA SA GLASS PLATEN 247 356 2 85 CLEAR SA 7 5 0 JC96 03381AJELA HOU OPE SCX 4521F SEC WHITNEY OPE AS SA SA SA RUBBER SCROLL SCX 4521F SILICON 184 12 6 SA 7 5 4 JC92 01727AJPBA SUB WHITNEY_OPE SCX 4521F SEC USA OP SA KEY M_COPY_R2 SCX 4720F ABS HB G71335 K0011 SA SA KEY M_TEL_R2 SCX 4720F ABS HB G71335 SA 7 5 8 JC64 00058A KEY M TONER SAVE SCX 4216F ACRYL HB
71. SEMITEC 364FL Type Temperature Resistance 7 k 180 C SYSTEM Temperature SETTING Stand by 165 5 C Printing 175 5 C 5 minutes before 170 5 C 5 minutes after Overshoot 200 C or less Overheat 210 C or less 4 Safety Relevant Facts Protecting device when overheating 1st protecting device HAW cuts off when detecting an overheating 2st protecting device S W cuts off when detecting overheating 3st protecting device Thermostat cuts off the power Safety device The power of Fuser is cut off after front cover is open The overheating safety device for customer The surface temperature of the Fuser Cover is under 80 C Samsung Electronics Service Manual EJ Svstem Overview 3 4 Sanner Part 600dpi Color CIS Module for Flat bed SCX 4521F uses the CIS scanning method 1 CIS SPEC Scanning size 216 mm width for letter size Light source LED Scanning sensor CIS 600 300 dpi Scanning mode Color SCAN Mono SCAN MTF 30 300 dpi Chart CIS interface Analog output Power supply 3 3V Clock Frequency 5MHz max Number of output 1 LED Current Red Green Blue 60mA Clamp Level 1 1V Connection 12 pin FFC connector pitch 1 0mm 2 Scan Resolution a Transmission Normal Vertial 3 85 Line mm Horizontal 8 Pels mm 203 x 98dpi Fine Vertial 7 7 Line mm Horizontal 8 Pels mm 203 x 196dpi Super Fine Vertial 11 8 Line mm Horizo
72. T P MAIN BOARD SCX 4521F SECC 0 8 SA 7 1 18 JC63 00665A GROUND P MAIN BOARD SCX 4521F SUS304CSP SA SA SA sh 7 1 21 1 0604 001095 PHOTO INTERRUPTER TR 90 150mW DIP 4 BK P0013 SA SA SA COVER M SIDE R SCX 4521F ABS 2 5 302 7 SA 7 1 23 JC96 03388AJELA HOU COVER SIDE L SCX 4521F SEC WHITN SA SA SA IPR UNIT FIXING BRAC SF 350 SECC 11 0 SA 71 24 JC97 02202A MEA COVER FRONT SCX 4521F SEC WHITNEY CO SA SA SNA TRAV M EXTENSION LARGE ML 1610 HIPS 2 7 SNA 7 1 24 4 JC63 00629A TRAY M EXTENSION SMALL ML 1610 HIPS 2 SNA SA SA PMO M STACKER SCX 4521F HIPS SOFT WHITE SA 7 1 25 3 JC63 00838A SHEET FAN SCX 4521F PET 10 188 70 0 46 0 SA MEA UNIT COVER REAR SCX 4521F SEC REAR 22421 SA SA COVER M JAM SCX 4521F PC 2 5 224 9 65 0 SA 7 1 26 2 2 JC63 00655A COVER M JAM DUMMY SCX 4521F PET GF30 2 5 SA SA CAP M HINGE SCX 4521F POM 2 5 9 6 24 9 W SA COVER M PAPER SCX 4521F ABS 2 5 269 97 1 SA 7 1 30 3903 000042 CBF POWER CORD DT EU FP3 VES IEC320 C13 SA CBF LINE CORD MINI FAX IVR SA ELA HOU ADF SCX 4521F SEC ADF ASS V SA ELA HOU ADF LOWER SCX 4521F SEC ADF LO SA 7 2 1 1 JC63 00656A COVER M ADF LOWER SCX 4521F ABS 2 5 131 SA SA SA GEAR CLUTCH 39 SCX 5150 POM M0 6 Z39 W SA 7 2 1 2 3 JC66 00457A GEAR SWING 31 20 ADF SCX 4216F POM M0 6 SA SA SA BRACKET P MOTOR ML 2010 SECC 2 0 45 6 11 SNA 7 2 1 2 6 JC61 01180A BRACKET P MOTOR SCX 4521F SECC 0 8 66 1 SA SA IMPELLER ADF SCX 4216F NYLON66 V SA BRACKET M GEAR SCX 4521F
73. VOS 2X91 091 Service Manual Samsung Electronics Connection Diagram 9 Connection Diagram veel 4ND P a ALAWIT d age 9ND a dav TND 6ND TIND LND Pid Ue LND HLI MS eND OWDIW pd SdAH TIND YOSNAS 3WOH p d 1dO OLND LIND 81ND EIND TND HOLIMS OYDIN p a SdINS IND LND a Ee l l I l INT l jeunxi INITIAL i l w OE OE l l l XINO 4ICSV XDS A NA 10 Adve YSN 40 AOLL r Service Manual EJ Samsung Electronics
74. Yes 10 3 Yes 10 3 Linux Yes Yes Driver Printer SPL SPL TWAIN Yes Yes WIA Yes Yes ScanToPC Yes Yes PC FAX No Yes Send only Application RCP Yes Yes Status monitor No No SmarThru4 Yes Yes Ea Service Manual Samsung Electronics Product Specifications 2 2 9 Accessory Items SCX 4321 SCX 4521F Quick Setup Guide Yes include Setup Guide and Function Guide Quick User Guide Yes Korea Only Yes Korea Only S W CD ROM 1 CD Contents Electronic User Manual SmarThru Print Driver Twain Driver RCP Toner Cartridge 1EA Power Cable 1EA Telephone Jack No 1EA Printer Cable No No Tray Coner Yes Yes 2 2 10 Consumables Items SCX 4321 SCX 4521F Tvpe Single Cartridge Single Cartridge How to install Front door open and front loading Front door open and front loading Toner Vield 3 000 pages at ISO 19752 5 Coverage Ships with 1 000 pages Starter Toner Cartridge Code SCX 4521D3 SCX 4521D3 Level Sensor Samsung Electronics Service Manual E System Overview 3 System Overview 3 1 System Layout The SCX 4521F 4321 is roughly made up Main Control part Operation Panel part Scanner part Line Interface part and Power part Each Part is separated Module which focus on common and standard design of different kind products main control part adopting Fax amp LBP Printer exclusive Controller is chorus2 CPU ASIC and 1 Board Scanner part is composed of ADF and P
75. ace part FAX Modem part and Printing process I F part CPU handles the BUS control I O interface scan interface PC interface and other miscellaneous driver circuit 1 Main Board Main Board has a function of sending Current Image Video Data to LSU of the machine controlling motor Driving Circuit and monitoring Paper Exit Sensor Cover Open switch OPE Panel Inputs 2 Main Controller CPU Chorus2 is the main CPU and is made up on the 16 32bit RISC architecture using ARM7TDMI core Main CPU controls the whole system according to the program code which stored in the Flash ROM memory Summary of the Key Function Block gt vevevovovvvvvvvvv V 1 8V for internal Core 3 3V for I O Pad with 4KByte Cache Image Processor included On Chip clock generator with PLL Memory and External Bank Control DMA Control 5 Channel Interrupt Control 2 port USB Host 1 port USB device ver 1 1 interface control Parallel interface control UART 2 Channel Synchronous Serial Interface Control A D Converter 10 bit 2channel General I O Port control Tone Generator RTC with calendar function S W Assistant function Rotator Flash Memory Stores system program and can be updated to the newer system program code through the PC interface It stores the FAX Journal List One Touch dial number speed dial number and machine configuration setup data Capcitv 2 Mbyte Access Time 70 nsec SDRAM S
76. anel 4 3 Consumables and Replacement Parts 4 4 LED Status Error Messages 4 5 Periodic Defective Image 4 6 How to use DCU 4 7 Paper Path 10 Disassembly and Reassembly 5 1 General Precautions on Disassembly 5 2 Disassembly and Reassembly Troubleshooting 6 1 Checking Symptoms 6 2 Bad discharge 6 3 Malfunction 6 4 Bad software environment 6 5 Bad Image Exploded Views amp Parts List 7 1 Exploded Views and Parts List Block diagram 8 1 System Block Diagram 8 2 System Timing Chart Connection Diagram 9 1 Connection Diagram Schematic Diagram 10 1 Main Board 10 2 Connector Circuit Diagram 10 3 SMPS Circuit Diagram 10 4 HVPS Circuit Diagram 5 1 5 2 6 1 6 4 6 8 6 13 6 17 7 1 8 1 8 2 9 1 10 1 10 5 10 6 10 7 Continued 11 Reference Information 11 1 Troubleshooting Tools 11 2 Acronvms and Abbreviations 11 3 Selecting printer locations 11 4 Sample Tests Patterns 12 Circuit Description 12 1 Engine Controller Precautions 1 Precautions In order to prevent accidents and to prevent damage to the equipment please read the precautions listed below carefully before servicing the printer and follow them closely 1 1 Safety Warning 1 Only to be serviced by appropriately qualified service engineers High voltages and lasers inside this product are dangerous This printer should only be serviced by a suitably trained and qualified service engineer 2 Use only Samsung
77. any component from the machine note the cable routing that will be affected Whenever servicing the machine you must perform as follows 1 Check to verify that documents are not stored in memory 2 Be sure to remove the toner cartridge before you disassemble parts 3 Unplug the power cord 4 Use a flat and clean surface o Replace only with authorized components oO Do not force plastic material components 7 Make sure all components are in their proper posi tion Releasing Plastic Latches Many of the parts are held in place with plastic latches The latches break easily release them carefully To remove such parts press the hook end of the latch away from the part to which it is latched Samsung Electronics Service Manual Disassembly and Reassembly 5 2 MP Tra 3 Hold the MP Tray and pull it to the arrow direction 1 Open the Front Cover Front Cover 2 Release the Toner Cartridge Samsung Electronics 52 Service Manual Disassembly and Reassembly 5 3 Pick Up Roller 1 Before vou remove the Pick Up Roller vou should 2 To exchange Pick Up Sponge pull part Pick Up remove Housing U while pressing the hook on the both MP Tray Refer to the 5 2 side the Pick Up Housing B 5 4 Front Cover 1 Open the Front Cover 2 To remove the Front Cover first pull the part below the right side o
78. ark black vertical band occur in the printing Check and Cause Solution 1 Damaged develop roller in the Developer 1 If causes 1 and 2 occur in the developer Deformed Doctor blade or cleaning cartridge replace the developer and try to blade print out 2 Scratched surface of the discharge roller 2 Replace the transfer roller if occurred as in the developer No 3 3 Partly depression or deformation on the surface of the transfer roller 6 5 2 Vertical White Line Description White vertical voids in the image Check and Cause Solution Digital Printer Digital Printer 1 Foreign matter stuck onto the window of Foreign matter stuck onto the window eer internal lenses of LSU mirror Clean the LSU window with recommend Digital Printer ed cleaner IPA Clean the window with a Digital Printer clean cotton swab Digital Printer 2 Foreign matter or toner particles between 2 Foreign matter in the LSU Open the the developer roller and blade cover of LSU and clean with a cotton In case the life of the developer has swab on the surface of the reflex mirror been expired white lines or light image occur in front of the image 3 It mav occur when Burr and foreign sub 3 No 3 Remove the foreign matter and stances are on the window of the devel burr of the exposure window oper frame Developer cartridge 4 lf the fuser is defective voids occur peri 4 No 4
79. ble Upper Level Sends you back to the upper menu level Start Starts a job Stops an operation at any time Stop Clear In Standby mode clears cancels the copy options such as the darkness the document type setting the copy size and the number of copies Allows you to access a list of your PC software programs that an image can be scanned to You must Scan to create the scan list using the Samsung software Printer Settings Utility provided with this machine For details see Software User s Guide Allows vou to save on toner bv using less toner to Toner Save i print a document m lt bunH 20 Hu Service Manual gg Samsung Electronics Alignment and Adjustments 4 4 LCD Status Error Massages STATUS LCD Displav Descriptions Document Jam Document Jam When Document Jam occurred at ADF module This is displayed on LCD Print in the Transmission Journal Door Open or Jam Cover Open Front or Rear Cover Open When machine front side cover or Jam Cover was opened it displayed On the LCD NO paper No Paper Add Paper When there is no paper in CASSETTE Tray machine Displays this message on LCD PAPER JAM 0 Paper Jam 0 Open Close Door When the machine encountered paper jam in pick up area Machine displays on the LCD until DOOR OPEN amp CLOSE PAPER JAM 1 Paper Jam 1 Open Close Door When the machine encountered paper jam in paper exit of
80. cause a fire or electric shock 2 Use only the power cable supplied with the printer Use of an incorrectly specified cable could cause the cable to overheat and potentially cause a fire 3 Do not overload the power socket this could lead to overheating of the cables inside the wall and could lead to a fire 4 Do not allow water or other liquids to spill into the printer this can cause electric shock Do not allow paper clips pins or other foreign objects to fall into the printer these could cause a short circuit leading to an electric shock or fire hazard 5 Never touch the plugs on either end of the power cable with wet hands this can cause electric shock When servicing the printer remove the power plug from the wall socket 6 Use caution when inserting or removing the power connector The power connector must be inserted com pletely otherwise a poor contact could cause overheating possibly leading to a fire When removing the power connector grip it firmly and pull 7 Take care of the power cable Do not allow it to become twisted bent sharply round corners or otherwise damaged Do not place objects on top of the power cable If the power cable is damaged it could overheat and cause a fire or exposed cables could cause an electric shock Replace a damaged power cable immediately do not reuse or repair the damaged cable Some chemicals can attack the coating on the power cable weakening the cover or exposing cables causing
81. ck that the RECEIVE Mode is set to FAX MODE If the fault persists even when the RECEIVE Mode is changed to FAX MODE then replace the LIU and the Main B d in sequence Samsung Electronics Service Manual g Troubleshooting 6 6 8 Defective FAX RECEIVE 4 Description Received data is reduced by more than 50 in the printing i Check and Cause Solution Check the FAX status of the forwarding side This is a problem with the sending fax machine Correct the setting on the remote machine 6 6 9 Defective Automatic Receiving Description The automatic receiving function is not working Check and Cause Solution 1 Check that the RECEIVE Mode is set to FAX 1 If the RECEIVE Mode is set to the TEL MODE reset it MODE to the FAX MODE 2 Even after the RECEIVE Mode is changed to the FAX Mode the problem persists then try to replace the LIU and the Main B d in sequence EI Service Manual Samsung Electronics Troubleshooting 6 7 Copy Problems 6 7 1 White Copy Description Blank page is printed out when copying Check and Cause Solution 1 Check the Scanner Cover is properly closed 2 Check shading profile 3 Check white black reference voltage on Main PBA 1 Room light can pass through a thin original 2 Redo shading profile in the tech mode 3 Replace the Main PBA 6 7 2 Black Copy e Description Black page is printed out when Copying
82. d 632 Service Manual Samsung Electronics Troubleshooting 6 10 2 The printer is not working 2 U Description After receiving the print command there is no response at all or print speed is low due to wrong setup of the environment rather than malfunction of the printer itself Check and Cause Solution 1 Ensure vou have sufficient free hard disk space for the 1 Not working with the message insufficient printer temporarv work files created during printing memory means there is a hard disk space problem rather than a printer RAM problem In this case pro vide more space on the hard disk Secure more space using the disk utilities program N 2 Printing error occurs even if there is enough space in The connection of the cable and printer port is not the hard disk correct Check that the cable is properly connected and if you are using the parallel port check that the port settings in CMOS is correct e9 3 Check the parallel port related items in the CMOS For the printer port Select ECP SPP and normal Setup normal modes support 8 bit data transfer while ECP Mode supports 12 bit data transfer 4 Reboot the svstem to print 4 If the regular font is not printing the cable or the printer driver mav be defective Turn the PC and printer off and reboot the svstem to print again If not solved double click the printer in my computer If the regular fonts are not printed this time again the
83. d connectors replace if defective If the problem persists replace the main PBA Note Check motor operation using Engine Test Mode c Description When system power is turned on the LCD panel does not come on Check and Cause Solution 1 Check if the power input and SMPS output are normal 2 LCD panel does not come on but normal start up sounds are heard 3 After replacing SMPS display does not come on and no start up sounds are heard 1 Replace the power supply cord or SMPS Check power fuse and SMPS fuses replace if necessary 2 Replace the OP panel 3 Replace the main PBA 6 3 10 Printed Vertical Lines become curved e Description 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 Samsung Electronics Service Manual gg Troubleshooting 6 4 Bad Software Environment 6 4 1 The printer is not working 1 e Description While Power turned on the printer is not working in the printing mode Check and Cause Solution 1 Run Self Test Mode Turn the power on and pressing System Data List by pressing Menu Reports System Data 2 Check if the PC and the printer is properly connected and the toner cartridge installed 3 Printing is not working in the Windows 4 Check if the
84. d the ther mostor and remove the contamination of the pressure roller 2 If there is heavy background repair it by the background troubleshooting method 3 The surface of the heat roller with IPA or water 4 Check the warp or separation of the sprint claw and the holder plate claw and then man age it 66 Service Manual Samsung Electronics Troubleshooting 6 2 7 Paper rolled in the Toner Cartridge OPC Drum e Description Paper is rolled up in the OPC Check and Cause Solution 1 Paper is too much thin 1 Recommend to use normal paper 2 The face of paper is curled 2 How to remove the rolled in the OPC Drum e Remove the paper while turning the OPC Drum against the ongoing direction Service Manual Samsung Electronics Troubleshooting 6 3 Set Malfunction Causes and Solutions 6 3 1 LCD Display Defect a a a sin LCD Display e Description Strange characters are displayed in the LCD Window and OPE Panel buttons do not work Check and Cause Solution 1 Clear the memory 2 Check that the OPE HARNESS is connected to the Connection Board correctly 6 3 2 Defective OPE Keypad 1 Try again after clearing the memory 2 If re connecting the harness does not correct the fault replace the OPE Ass v and the main Board in sequence e Description Pressing keys does not cause the set to respond correctly Check and Cause Solution 1
85. e 4 19 Service Manual Samsung Electronics Alignment and Adjustments 4 5 3 Detail Description Engine Test Mode Function Name 01 Motor Test Description The main motor starts when the execution kev is pressed and stops when the stop key is pressed Displav Main Motor On Off 02 Pick Up Test Automatically stops when the execution is chosen stops when the execution is chosen Tray 1 2 Solenoid On Off 03 Fan Test The fan starts when the execution key is pressed and stops when the stop key is pressed Fan On Off 04 Manual Clutch Test The tray2 3 clutch is on for 1sec and then it automatically stops when the execution is chosen On this function the main motor runs before 2sec from the point of the clutch on in order to check the clutch state Tray 2 3 Clutch On Off 05 PTL Test PTL Pre Transfer Lamp is lights when the execution key chosen and it stops when the stop key is chosen PTL On Off 11 LSU Motor The laser motor starts when the execution key is pressed and stops when the stop key is pressed Laser Motor On Off 12 LSU Hsync Test The LSU motor starts and Laser Ready is displayed if the motor spins at the correct speed otherwise Laser Error is displayed Laser Leady On Off 13 LD Test Diode On is displayed when the laser diode is on Otherwise Diode Off is displayed Diode On Off 21 Feed Sen Test These functions allow the curr
86. e Solution Insufficient space on the hard disk in the directorv assigned for the basic spool 2 If previous printing errors were not solved 3 There may be conflict with other drivers or programs 4 When an application program or the printer driver is damaged 5 When some files related to the OS are damaged or virus infected 6 Memory is less than suggested A How to delete the data in the spool manager 1 Delete any unnecessary files to provide more space for spool storage 2 There may be files from previous failed print jobs on the hard disk with the name in the form jnl Delete these files and Reboot Windows to restart the printer 3 Shut down all other programs except the current one if possible 4 Delete the printer driver completely and reinstall it 5 After rebooting the computer check for viruses restore the damaged files and reinstall the application program which is not working properly 6 Add up more memory to the PC In the spool manager the installed drivers and the list of the documents waiting to be printed are shown Select the document to be deleted and check delete in the menu If the job you are deleting is the current job when you delete the job data that has already been transferred to the printer s memory will still be printed If there is a problem with the printer out of toner offline out of paper etc the job may take a long time to delete as it mus
87. e 5 9 ADF Motor Harness from the Platen Cover as shown below 2 Open the ADF Housing and insurt a flat blade screwdriver into the slot as shown below and remove the Cap Hinge from the Platen Housing and ADF Housing 5 If necessary remove the two screws securing the TX Stacker Ass y and remove it as shown below 3 Remove the ADF Housing from the Platen Housing At that time carefully release the ADF Motor Harness from the Platen Housing as shown below ADF Housing Scan Motor Harness Service Manual Samsung Electronics Disassembly and Reassembly 6 Open the Open Cover and remove the Open 8 Remove the two screws securing the ADF Upper Cover in the direction of arrow as shown below and insurt a flat blade screwdriver in to slot as shown below and remove the ADF Upper Open Cover ADF Upper 7 Pull the Bush then rotate until it reaches the slot as shown below Then lift the Pick Up Unit 9 Unplug the Connector from the ADF PBA and remove the four screws securing the ADF Motor Housing and remove it in the direction of arrow as shown below MU Pick Up Unit Bearing 540 Service Manual Samsung Electronics Disassembly and Reassembly 5 11 OPE Unit Please refer to this procedure when you disassemble 3
88. e expired 2 The abnormal voltage and bad contact of the terminal of the supply roller 1 Occur in the developer cartridge replace the developer and try to print out 2 Check the approved voltage of the supply roller and contact of the terminal and adjust if necessary Description Ghost occurs at 47 5mm or 63 9mm intervals Digital Printer Digital Printer Digital Printer WWE E9 10 GLP Check and Cause Solution The temperature of the fuser is maintained high 1 Disassemble the fuser and remove the contaminated toner particles on the roller and clean the foreign matter between Thermistor and Heat roller MA Caution can be deformed 6 5 13 Stains on the Face of Page s Description The background on the face of the printed page is stained SEE ee ne Check and Cause Solution DigitalPrinter nT Digitak Printer 1 Toner leakage due to improperly sealed 1 Replace the developer cartridge np developer Digital Printer 4 ae Digital Printer 2 If the transfer roller is contaminated stains 2 If the transfer roller is contaminated run Digital Printer on the face of page will occur DRUM Cleaning Mode Print 2 or 3 times bo ee A And perform Self Test 2 or 3 times to remove contamination Samsung Electronics Service Manual 6 21 Troubleshooting 6 5 14 Stains on Back of Page Description The back of the page is stained at 47 mm i
89. e in the HVPS board 3 The life of developer is expired 4 Transfer roller lifetime 50 000 sheets has expired 5 Abnormal low temperature below 10 C 6 5 10 Ghost 2 1 Clean the terminals when contaminated by toner particles 2 Occur in the developer cartridge replace the developer and try to print out 3 Replace the Main board and HVPS Board if not solved by the above directions 1 2 4 If not solved by the direction 3 check the transfer roller lifetime and replace it 5 Wait about 1 hour after power on before using printer e Description Ghost occurs at 75 5 mm intervals of the OPC drum in the whole printing When printing on card stock or transparencies using manual feeder Digital Printer Digital Printer Digital Printer WWUSG Check and Cause Solution When printing on card stock thicker than nor mal paper or transparencies such as OHP higher transfer voltage is required Select Thick Mode on paper type menu from the software application and after using return ing to the original mode is recommended EJ Service Manual Samsung Electronics Troubleshooting 6 5 11 Ghost 3 a e Description White ghost occurs in the black image printing at 47 5mm intervals i Digital Printer Digital Printer Digital Printer 6 5 12 Ghost 4 WLUG L 7 Check and Cause Solution 1 The life of the developer may b
90. efault Pulse Changing in Tech Mode Pause Yes Auto Redial Yes Last Number Redial Yes Distinctive Ring 2 Yes Caller ID No Extention Phone Interface Yes Report amp List Tx Rx Journal Yes Print out Confirmation Yes Help List No Auto Dial List Yes System Data List all user setting List all user setting Sound Control Ring Volume Yes Off Low MED HIGH Key Volume Yes On Off Alarm Volume Ves On Off Speaker Yes On Off Comm 2 4 Service Manual Samsung Electronics Product Specifications 2 2 6 Fax Specifications Items SCX 4321 SCX 4521F Compatibility ITU T G3 Modem Speed 33 6Kbps TX Speed 3sec Compression MH MR MMR JPEG Color Fax Yes Tx Only ECM Yes Resolution Std 203 98dpi Fine 203 1 96dpi S Fine 300 300dpi Photo 203 1 96dpi Color 200 200dpi Auto Switching Yes Scan Speed Standard approx 3sec ADF approx 5sec Platen Fine s approx 7sec ADF approx 8sec Platen S Fine a approx 7sec ADF approx 8sec Platen Rx fax duplex print out No Multiple page scan speed Memory Tx 7 cpm Ltr Standard Resoution Res Receive Mode Fax TEL Ans Fax DRPD Memory Capacity 2MB When Power off Memory Back up Optional Memory No Max locations to store 99 locations to 1 Group Dial Fax Forward Yes On O
91. en expected to collide with other program 4 When an application program or the printer driver is damaged 5 When some files related to OS are damaged or virus infected 6 Memory is less than suggested one Av How to delete the data in the spool manager 1 Delete the unnecessary files to provide more space to start printing job 2 If there are some files with the extension name of xxii inl Delete them and Reboot the Windows to restart printing job 3 Shut down all other programs except the current one if possible 4 Delete the printer driver completely and reinstall it 5 After rebooting the computer check for viruses restore the damaged files and reinstall the program to do the printing job 6 Add up enough memory to the PC In the spool manager the installed drivers and the list of the documents waiting to be printed are shown Select the document to be deleted and check the delete menu If you intend to delete the current document being printed the data being transferred to the printer will be put out and then the document is removed Before choosing the document the menu is still inactive Or put the document out of the list and repeat the routine as in the above or finish the spool manager Samsung Electronics Service Manual Troubleshooting 6 5 Bad image 6 5 1 Vertical Black Line and Band Description 1 Straight thin black vertical line occurs in the printing p 2 D
92. ent state of the sensor to be Sensor Off or Sensor On 22 Exit Sen Test displayed 23 Cover Sen Test This function allows the current state of the Cover sensor Cover Open or Cover Close to be displayed Touch the sensor and confirm that the message changes Cover Open to Cover Close 24 Empty Sen Test These functions allow the current state of the sensor to be Sensor Off or Sensor On 25 Manual Sen Test displayed 31 Them ADC 180 Current value is displayed on the upper line of the LCD Target temperature and 32 Them ADC 140 and Target value on the bottom line output temperature from 33 Them ADC 120 Target value is limited from 191 C to 80 C thermistor and ADC 34 Them ADC 100 41 MHV Test These Functions are provided to check whether the MHV On Off 42 Dev Bias Test control of the HVPS is functioning correctly Dev Bias On Off 43 THV EN NEG Test THV EN NEG On Off 44 THV ON 1300V THV On Off 45 THV ADC 1300V ADC value displayed 46 THV ADC 600V 3500 ADC value displayed Samsung Electronics Service Manual 4 20 Alignment and Adjustments 4 6 Paper Path and Clearing Paper Jams 4 6 1 Copy amp Scan Document Path ADF ROLLER PICK UP ROLLER COVER OPEN e jis SSeS EXIT ROLER ADF UPPER FEED ROLLER ro ADF LOWER LK a L Ss ISCAN UPPER j i bh WHITE BAR ADF GLASS 4 21 Service Ma
93. ep Mode Under 10 W Standby Mode 65W Average 350 W Print Mode Energy Star Compliant Yes Power Switch Yes Noise Warm up 49 dBA Stand by 35 dBA Coping 55 dBA Printing 53dBA Warm up time from Power On Status Less than 35 seconds from Sleep Mode Less than 30 seconds Recoverv time Max Monthly Print 4 200 pages Volume Scan ADF 2 500 pages PLATEN 1 700 pages Average Monthly Print Volume 400 pages Average Monthly SCAN Volume 150 pages Machine Life ENGINE 5 years or 50 000 Pages Whichever comes first SCANNER ADF 30 000 Pages Platen 20 000 Pages Operation Temperature 10T 32 50 F 89 F conditions Humidity 20 80 RH Approval Class B Device Memory 16MB Page Counter Yes Print Configuration Sheet System Data Yes Ea Service Manual Samsung Electronics Product Specifications 2 2 2 Print Specifications Items SCX 4321 SCX 4521F Method Laser Beam Printing Laser Beam Printing Speed Up to 22ppm in A4 22ppm in Letter Up to 22ppm in A4 22ppm in Letter Emulation SPL SPL Power Save Yes Interval option 5 10 15 30 45 minute Yes Interval option 5 10 15 30 45 minute Resolution Normal 600 x 600 dpi 600 x 600 dpi RET Memory 10MB 10MB First Print Out From Stand by Approx 11 seconds Approx 11 seconds Time From Cold Status Less than 41 seconds Less than 41 seconds Duplex Print WHQL
94. er supply becoming low you can temporarily improve the print quality by redistributing the toner Shake the toner cartridge however you should replace the toner cartridge to solve the problem permanently 6 9 2 1 Redistributing Toner When the toner cartridge is near the end of its life white streaks or light print occurs The LCD displays the warning mes sage Toner Low You can temporarily reestablish the print quality by redistributing the remaining toner in the cartridge 6 9 3 Standard of guarantee for consumable parts Please refer to User s Manual or Instructions on Fax Printer Consumables SVC manual for the criteria for judging the quality of consumable parts the standard of guarantee on those parts Spotting a refilled cartridge by eye One way security screws are used in the manufacture of the cartridge check if these are damaged EJ Service Manual Samsung Electronics Troubleshooting 6 9 4 Error messages in the LCD window related to toner This section explains messages on the LCD that are related to the data stored in the EEPROM in the toner cartridge 6 9 4 1 Toner Low Explanation The amount of toner remaining is less than 10 Solution The cartridge is almost empty or life expired replace the cartridge 6 9 4 2 Toner Empty Explanation The toner cartridge is empty Solution Replace the cartridge 6 9 4 3 Drum Warning Explanation This message appears when the OPC drum is nearing
95. ersonal safety reasons prior to applying power to the unit under test 2 After removing an electrical assembly equipped with ESDs place the assembly on a conductive surface such as aluminum or copper foil or conductive foam to prevent electrostatic charge buildup in the vicinity of the assem bly 3 Use only a grounded tip soldering iron to solder or desolder ESDs 4 Use only an anti static solder removal device Some solder removal devices not classified as anti static can generate electrical charges sufficient to damage ESDs 5 Do not use Freon propelled chemicals When sprayed these can generate electrical charges sufficient to dam age ESDs 6 Do not remove a replacement ESD from its protective packaging until immediately before installing it Most replacement ESDs are packaged with all leads shorted together by conductive foam aluminum foil or a compa rable conductive material 7 Immediately before removing the protective shorting material from the leads of a replacement ESD touch the pro tective material to the chassis or circuit assembly into which the device will be installed 8 Maintain continuous electrical contact between the ESD and the assembly into which it will be installed until com pletely plugged or soldered into the circuit 9 Minimize bodily motions when handling unpackaged replacement ESDs Normal motions such as the brushing together of clothing fabric and lifting one s foot from a carpeted fl
96. f possible and must not exceed the TIMS out level 3 Speaker Driving Part Analog Switch MC14053BD makes a path for FAX Tone Ring Key click sound and Analog MUX MC14051 makes a different signal level so that the the Speaker driver chip MC34119 can driving the Speaker with different sound volume 5 Printing Process Part Printing Process part is made of PC Interface part PVC Priter Video Controller LSU control part High Voltage control part and Fuser Unit control part PC interface core is included in the Chorus2 ASIC and controls the PC interface LSU control part controls the LSU polygon motor Laser diode video data output so that the printing image can be made up on the OPC Drum 6 Line Interface Part Line interface part helps the machine connect to the PSTN or PABX Line and is made of almost primarv circuit Its main function is Line connection Line state monitoring and TAD interface that enables a extension telephone or TAD machine to connect to the SCX 4517F machine 7 Engine Paper Feeding 1 Feeding Type MP Cassette Type 2 Feeding Standard Center Loading 3 Feeding Qty Cassette 150 sheets 75g 20lb paper standard 4 1 sheet Paper OHP Envelope etc 5 Separating Type Cassette Friction Pad Type 6 Manual Tray 1 sheet 7 Driver Type Driving by Gearing from Main Motor 8 Pick_up Roller Driver Solenoid 9 Pick up Roller Rubber Material EPDM IR U 1 3 or more 10 Pick up Velocity 94 8731mm Sec Process
97. f the Front Cover with a light pressure to the direction of arrow left Service Manual Samsung Electronics Disassembly and Reassembly 5 5 Cassette Tray 1 Open the Cassette Tray 2 As shown below to remove the Cassette Tray lift the nob to the direction of the arrow with a light pressure while holding the Set left 5 4 Service Manual Samsung Electronics Disassembly and Reassembly 5 6 Rear Cover 3 To remove the Rear cover make sure the right 1 Remove the four screws securing the Rear Cover Power Switch doesn t get jammed to the Rear Cover as shown below and remove it Rear Cover CA WA Geo 2 Open the Jam Cover 4 If necessary remove the Jam Cover in the direction of arrow as shown below Jam Cover Rear Cover Service Manual EI Samsung Electronics Disassembly and Reassembly 5 7 Right Cover 1 Before you remove the Right Cover you should 3 Apply light pressure to the back of the Right Cover remove and pull it to the right side in the direction of arrow Front Cover Refer to the 5 4 as shown below Rear Cover Refer to the 5 6 2 Remove the one screws securing the Right Cover 56 Service Manual Samsung Electronics Disassembl
98. facturing use only SHADING TEST The function is used to set the optimum scan quality determined by the specific characteristics of the CIS Contact Image Sensor If copy image quality is poor perform this function to check the condition of the CIS unit lt Method gt SHADING VALUE 1 Select the Shading Test in TECH MODE ee posse mamiss Menu 1934 2 Push the ENTER button and an image will be scanned 3 After scanning the CIS SHADING PROFILE will be print out 4 If the printed image is different to the sample image shown the CIS is defective NOTICE When you test the CIS make sure that the cover is closed Service Manual Samsung Electronics Alignment and Adjustments 4 2 6 Report PROTOCOL LIST This list shows the sequence of the CCITT group 3 T 30 protocol during the most recent sending or receiving operation Use this list to check for send and receive errors li SVSTEM DATA This list provides a list of the user system data settings and tech mode settings KEY HISTORY This list shows th input key history ERROR INFO This list display the detail machine error list 4 13 Service Manual Samsung Electronics Alignment and Adjustments 4 3 Control Panel 4 3 1 Control Panel Functions SCX 4521F SAMSUNG Start Stop Clear ee 6 SCX 4521F Adjusts the brightness of the documents for the Darkness current copv job
99. ff Broadcasting 109 locations Max locations Cover page NO Delayed fax Yes Memory RX Yes Functions Voice Request No TTI Yes RTI Yes Polling No Earth Recall No Auto Reduction Yes RDS Yes Junk Fax barrier Yes Security Receive Yes Memory Back up gt Max 72hours Samsung Electronics Service Manual gJ Product Specifications 2 2 7 Paper Handling Specifications Items Input Capacity and Types SCX 4321 150 sheet Cassette Tray 75 g m 20 lbs SCX 4521F 150 sheet Cassette Tray 75 g m 20 lbs Output Capacity and Types 50 sheet Face Down 75 g m 20 Ibs 50 sheet Face Down 75 g mr 20 Ibs Manual Tray 1 sheet 1 sheet Media size MA A5 A6 Letter Legal Folio Executive ISO B5 JIS B5 Monarch Envelope No 10 DL C5 C6 76 x 127 mm 3 x 5 216 x 356 mm 8 5 x 14 Media Type Plain Paper Transparency Label Envelope Tick Thin Bond Color Paper Card Stock Preprinted Paper Weight 16 24lb 60 to 90g m for 150 sheets Cassette Tray 16 43lb 60 to 165g m for 1 sheet Manual Tray ADF Capacity Up to 30 sheets of 20Ib 75g m paper Up to 30 sheets of 20lb 75g m paper ADF Document Size Up to Legal Up to Legal 2 2 8 Software Items SCX 4321 SCX 4521F Compatibility DOS No No Win 3 x No No Win 95 No No Win 98 ME Yes Yes Win NT 4 0 Yes Yes Win 2000 Yes Yes Win XP Yes Yes Mac
100. g to upgrade firmware ensure that computer and complete but when the network configuration printer can communicate using a Ping command is printed the software version has not changed SycThru is unable to automatically detect 1 Check that the LAN cable is connected to the printers If an IP the printer address is assigned to the computer and printer ensure that the Ping command can see the printer If an IP address is not allocated to the printer or it is in a different LAN segment then ensure that either IPX SPX or DLC LLC pro tocols are enabled on the computer Print the network configuration If the TCP IP or Network proto cols are disabled in the printer either use the front panel to re enable them or ensure that DLC LLC protocol is installed in the computer In SyncThru use the Settings Protocol Selection menu option to select either TCP IP or IPX protocols and then use the View Refresh option to scan the network again 4 Ensure that the network cable and wall socket are functioning correctly 5 Ensure that the version of SyncThru is the same as or newer than the version supplied with the printer 6 Ensure that there is no router between the printer and the computer as SyncThru will not work through a router 7 Ensure there are no Switch or Router VLAN or Access Control Lists which are blocking communication between the printer and the computer Note Windows XP does not support DLC LLC protocols ye ee
101. gain 6 22 Service Manual Samsung Electronics Troubleshooting 6 6 Fax amp Phone Problems 6 6 1 No Dial Tone e Description There is no dial tone when the On Hook dial button is pressed Check and Cause Solution 1 Check that the telephone line cord supplied with the set is connected to TEL LINE correctly 2 Listen for a CLICK sound when the OHD key is pressed 3 Check the connection of the HARNESS between the LIU and the Main B d 4 Check that the SPEAKER is connected correctly 6 6 2 Defective MF DIAL 1 If the telephone cord is OK but there is no dial tone try plugging a normal telephone into the wall socket If this is OK then replace the LIU B d 2 If you cannot hear the OHD CLICK sound the OPE Ass y may be defective Replace the OPE Ass v If the key click sound if off you cannot hear click sound even if OPE Ass y has no problem on it 3 Check the Speaker connection and the harness between the LIU and the Main PBA replace as necessary 4 Use Tech mode Modem Test to check that the speaker and amplifier are working Replace the Main B d e Description The MF DIAL is not functioning Check and Cause Solution 1 Check that the telephone line cord supplied with the set is connected to TEL LINE correctly 2 Listen for a CLICK sound when the KEY is pressed 3 Check the connection of the HARNESS between the LIU and the Main B d 4 Check
102. h the options Press Enter when you see the desired sound option 3 Press the scroll button lt or p to display the desired status or volume for the option you have selected You will see the selection on the bottom line of the display For the ringer volume you can select Off Low Med and High Setting Off means that the ringer does not sound The machine works normally even if the ringer is turned off Press Enter to save the selection The next sound option appears If necessary repeat steps 2 through 4 To return to Standby mode press Stop Clear 149 Service Manual Samsung Electronics Alignment and Adjustments 4 2 3 8 Speaker Volume 1 Press On Hook Dial A dial tone sounds from the speaker 2 Press the scroll button 4 or p until you hear the volume you want The display shows the current volume level 3 Press On Hook Dial to save the change and return to Standby mode NOTE You can adjust the speaker volume only when the telephone line is connected 4 2 3 9 Toner Save Mode Toner Save mode allows your machine to use less toner on each page Activating this mode extends the life of the toner cartridge beyond what one would experience in the normal mode but it reduces print quality To turn the toner save mode on or off press Toner Save e If the button backlight is on the mode is active and the machine uses less toner when printing a document e If the butt
103. he Firmware file to be used to update the set using the Browse Icon 4 Click the Update icon The firmware file is transmitted to the Printer automatically and the printer is initialized when the download completes 5 Click the Refresh icon and check that the updated version numbers are displayed DOS Command mode This method is ONLY for Parallel Port Connect the PC to the set using a Parallel Cable and enter the DOS Command to upgrade the firmware lt Method gt 1 First of all you need the following files down bat down com bin fprt exe and Rom File file name for upgrade Ensure you save ALL of these files in the same folder 2 At the DOS prompt enter the correct command as shown below and push the enter key Then the upgrade will automatically take place 3 There are two commands use the correct one depending on the condition of the set When the product is in the idle condition down rom file When the product is in Ready condition TECH MODE gt DATA SETUP gt FLASH UPGRADE gt LOCAL copy b rom file Ipti 4 Do not turn off the power during the upgrade process 2 Remote FAX It is possible to use a set that already has the latest firmware to upgrade a remote set remotely using the telephone system lt Method gt 1 On the set that has the latest firmware set it toi transmit the upgrade TECH MODE DATA SETUP FLASH UPGRADE REMOTE 2 Enter the telephone number of the set that needs
104. he display Press the scroll button lt or p until the language you want appears on the display Press Enter to save the selection To return to Standby mode press Stop Clear 4 2 3 2 Setting the Machine ID Only for SCX 4521F In some countries you are required by law to indicate your fax number on any fax you send The Machine ID containing your telephone number and name or company name will be printed at the top of each page sent from your machine 1 Press Menu until Machine Setup appears on the top line of the display The first available menu item Machine ID displays on the bottom line Press Enter The display asks you to enter the fax number If there is a number already set the number appears Enter your fax number using the number keypad NOTE If you make a mistake while entering numbers press the 4 button to delete the last digit 4 7 Press Enter when the number on the display is correct The display asks you to enter an ID Enter your name or the company name using the number keypad You can enter alphanumeric characters using the number keypad and include special symbols by pressing the 0 button For details on how to use the number keypad to enter alphanumeric characters If you want to enter the same letter or number in succession enter one digit move the cursor by pressing the button and enter the next digit If you want to insert a space in the name you can also use
105. im ad minim viniam quis nostrud exerci tation ullam corpersus cipit lotis nisl ut aliquip ex ea commodo consequat Lorem ipsum dolor sit 943098V68 9SvE LOZAXMAN LSHOdONA DIFIHD43Q0A Amet consectetuer adipiscing elit sud diam nonummv nibh veniam Stnecrep Balrecneps recneps adipiscing elit sed diam nonummy nibtil laoreet dolore mag aliam erat volutpat Ut wisi enim minim veniam quisient nostrud Sol uta nobis eleifendoptn cogue nihil imerdiet domg id quod mzim plerat facer posim aum Lorem ipsm dolor sit amet consectuer Duis autem eum iriure dolor in hendreritin vulputate velit cesse ea commodo mol Nam liber tempor cum soluta nobis eleifend option cogue nihil consequat 8 c D velillum Dolore eu zril feugiat nulla facilisis at vero eros accumsan et iusto odio dignissim qui bl praesent oBrez LOZAXMANLSHOAON Singabet Stephen J Singel I Demperta Aminerimum amp Labanda Sinpat Abarress JONWIMFIHD43008 9430094V68 9SvEL LOZAXMAN LSHOdONW DI FIHO423094V68 9SrEz LOZAXMANLSHO MANLSHOJONATIMPIHD43Q04V68L z SsJs dwg OFINAL e II n 4 G lt i GHIJKLMNOPQASTUVWX HIJKLMNOPQRSTUVWXYZ01 23456789ABCDEF BCDEFG Samsung Electronics Service Manual KU 2 Product Specifications 2 1 Product Overview Product Specifications Item Descriptions Remark Basic Model SCX 4521F 5 in 1 Flatbed MFP SCX 4321 3 in 1 Flatbed MFP Target User SOHO Economical Speed Price Customer Cus
106. int free cloth s Vacuum Cleaner e Spring Hook Standard For general use e Software Driver installation CD ROM SR Wa W N Samsung Electronics Service Manual 1141 Reference Information 11 2 Acronyms and Abbreviations 1 The table below explains the abbreviations and acronyms used in this service manual Where abbreviations or acronyms are used in the text please refer to this table Abbreviations Explanation AP Access Point AC Alternating Current APC Auto Power Control ASIC Application Specific Integrated Circuit ASSY assembly BIOS Basic Input Output System BLDC Brush less Direct Current CMOS Complementary Metal Oxide Semiconductor CN connector CON connector CPU Central Processing Unit dB decibel dbA decibel A dBM decibel milliwatt DC direct current DCU Diagnostic Control Unit DPI Dot Per Inch DRAM Dynamic Random Access Memory DVM Digital Voltmeter ECP Enhanced Capability Port EDC Embedded Diagnostic control EEPROM Electronically Erasable Programmable Read Only Memory EMI Electro Magnetic Interference EP electrophotographic EPP Enhanced Parallel Port FPOT First Printout Time F W firmware GDI graphics device interface GND ground HBP Host Based Printing HDD Hard Disk Drive H H High temperature and high marshy place HV high voltage HVPS High Voltage Power Supply VF interface O Input and Output IC integrated circuit IDE Intelligent Drive electronics or Imbedded Drive Electronics
107. interface It stores the FAX Journal List One Touch dial number speed dial number and machine configuration setup data Capcity 2 Mbyte Access Time 70 nsec SDRAM SDRAM is used for Print Buffer Scan buffer when scanning ECM Buffer when FAX Receiving and system working memory Capacity 16 Mbyte Access Time 66MHz based on system bus clock Data Backup 72 Hours Backup Battery Charging Time 100hours when completely discharged 3 2 2 Scan Part 1 Image Signal Input Part Image Signal from CIS has a level of about 1 2V and is goes to ADC of Chorus2 After ADC CIS analog signal will be converted to 8 bit Digital signal 2 Image Processing On the surface of the original paper the light from the CIS LED reflected and goes to the CIS Sensor Then the light is converted to the appropriate voltage suitable for ADC input Analog signal from CIS sensor is used for ADC input then is converted to 8 bit digital data Image processor of the Chorus2 will do the Shading correction function at first then Gamma correction function next After then the data goes to different module according to the copy or FAX resolution mode When Text mode the image data goes to LAT module when Photo mode the image data goes to Error Diffusion module when PC Scan mode the image data goes directly to the PC through DMA access Summary of the Image sensor interface is as below Minimum Scan Line Time 1 5ms Scan Resolution
108. ital Printer Charge roller 37 7 mm interval ae se OPC drum _ 75 5 mm interval 2 If faded areas or voids occur in a black image at intervals of 75 5 mm or black spots occur elsewhere the OPC drum surface is damaged ao If a black image is partially broken the transfer voltage is abnormal or the trans fer roller s life has expired If dark or blurry black spots occur periodi 1 Run OPC cleaning Mode Print and run the Self test 2 or 3 times 2 In case of 75 5 mm interval unremovable in 1 cleanly remove foreign substances stuck on the OPC location equivalent to black spots and white spots with a dry duster 3 The transfer roller guarantees 50 000 sheets printing If the roller s life is expired replace it 4 In case of 37 7 mm interval unremovable in 1 take measures as to replace the develop er cartridge and try to print out 5 Clean the inside of the set against the paper particles and foreign matter in order not to cause the trouble Samsung Electronics Service Manual Troubleshooting 6 5 5 Light Image Description The printed image is light with no ghost Check and Cause Solution 1 Develop roller is stained when the toner of developer cartridge is almost con sumed 2 Ambient temperature is below than 10 C 3 Bad contact caused by the toner stains between the high voltage terminal in the HVPS and the one in the set 4 Abn
109. ke a printing image on the paper High voltages applied to the MHV THV DEV SUPPLY 3 6 1 SMPS 1 AC Input Input Rated Voltage AC 220V 240V AC 110V 127V Input Voltage fluctuating range AC 180V 270V AC 100V 135V Rated Frequency 50 60 Hz Frequency fluctuating range 47 63 Hz Input Current Under 4 0Arms 2 5Arms But the status when lamp is off or rated voltage is inputted outputted 2 Rated Output Power NO Items CH1 CH2 Remarks 1 CHANNEL 5V 24 0V 2 CONNECTOR PIN CON 2 CON 2 Jam cover switch 5V PIN 5pin 24V PIN 2 3 4 included GND PIN 6pin GND PIN 7pin 3 Rated Output 5V 5 4 75 5 25V 24V 10 15 21 6V 27 6V 4 Max Output current 0 8A 2 5A 5 Peak Loading current 1 0A 2 7A within 1ms Duration 6 RIPPLE NOISE Voltage 100mVp p or less 500mVp p or less 7 Maximum output 2 5W 36W 8 Peak output AW 55 2W 1ms 9 Protection for loading Fuse Protection or Shutdown Fuse Protection or Shutdown shortage and within 1 5A 3 0A range within 3 5A 4 5A range overflowing current 3 Consumption Power NO Item CH1 5V e PALM System 1 Stand By 0 6A 1 3A AVG 65Wh 2 Printing 0 8A 1 9A AVG 350Wh 3 Sleep Mode 0 5A 0 3A AVG 10Wh Service Manual EH Samsung Electronics Svstem Overview 4 Power Cord Length 1830 50mm 5 Power Cord Switch Exist 6 Feature Withstand Resistance 100 yQ or more at DC 500V I
110. laten and is connected with Main by Harness Scanner part ADF ROLLER PICK UP ROLLER COVER OPEN EXIT ROLER FEED ROLLER ADF GLASS Engine Part BIN PATH Service Manual EJ Samsung Electronics Svstem Overview 3 1 1 Feeding section There is a universal cassette which automaticallv loads paper and the manual feed which supplies paper single sheet at a time The cassette has a friction pad which separates paper to ensure single sheet feeding and it has a sensor which checks when the paper trav is emptv Feeding Method MP Cassette Type Feeding Standard Center Loading Feeding Capacity Cassette 150 sheets 75g m2 20lb paper standard Manual 1 sheet Paper OHP Envelop etc Paper detecting sensor Photo sensor Paper size sensor None 3 1 2 Transfer Ass y This consists of the PTL pre transfer lamp and the Transfer Roller The PTL shines a light onto the OPC drum This lowers the charge on the drum s surface and improves transfer efficiency The transfer roller transfers toner from the OPC drum surface to the paper Life expectancy Over 50 000 sheets at 16 30 C 3 1 3 Driver Ass y Gear driven power unit The motor supplies power to the paper feed unit the fuser unit and the toner cartridge 3 1 4 Fixing Part Fuser The fuser consists of the Heat Lamp Heat Roller Pressure Roller Thermistor and Thermostat It
111. level Open Fuser Error Open Fuser Error The thermister has been disconnected Over Heat Error Over Heat Temperature has gone up very high degree Jam 1 No Catridge When the machine detected the toner cartridge has not been installed or detected jam1 in warmup state Memory Dial Full Memory Dial Full During Auto dial transmission when all 15 jobs are configured and try to add 16th job Samsung Electronics Service Manual Alignment and Adjustments Alignment and Adjustments 4 5 Engine Test Mode The Engine Test Mode supplies useful functions to check the condition of the print engine It tests the condition of each device and displays the result of the test on the LCD It is divided into 5 functions 0 4 and these are shown below 4 5 1 To enter the Engine Test Mode To enter the Engine Test mode SCX 4521F Press 5 in sequence and the LCD briefly displays Engine Test the machine has entered Engine Test Mode Press 0 1 2 3 or 4 to select the Test No see list below left hand column To enter the Engine Test mode SCX 4321 eturn Press m O B O in sequence and the LCD briefly displays Engine Test the machine has entered Engine Test Mode Press 0 1 2 3 or 4 to select the Test No see list below left hand column 4 5 2 Diagnostic
112. moving or re fitting any parts do not use excessive force especially when fitting screws into plastic 6 Take care not to drop any small parts into the machine 7 Handling of the OPC Drum The OPC Drum can be irreparably damaged if it exposed to light Take care not to expose the OPC Drum either to direct sunlight or to fluorescent or incandescent room lighting Exposure for as little as 5 mins can damage the surface s photoconductive properties and will result in print quality degradation Take extra care when servicing the printer Remove the OPC Drum and store it in a black bag or other lightproof container Take care when working with the covers especially the top cover open as light is admitted to the OPC area and can damage the OPC Drum Take care not to scratch the green surface of OPC Drum Unit If the green surface of the Drum Cartridge is scratched or touched the print quality will be compromised Service Manual KU Samsung Electronics Precautions 1 2 5 Disregarding this warning may cause bodily injury 1 Be careful with the high temperature part The fuser unit works at a high temperature Use caution when working on the printer Wait for the fuser to cool down before disassembiv 2 Do not put finger or hair into the rotating parts When operating a printer do not put hand or hair into the rotating parts Paper feeding entrance motor fan etc If do vou can get harm 3 When vou move the printer This prin
113. n and LSU sounds gt If not or there are none of the normal startup sounds check cable switch or SMPS gt Does the wall socket work 2 Check the LCD Panel e Is there any display at all gt If not check power cable switch or SMPS gt Does the wall socket work e Is the display a meaningful message care there any broken or badly formed characters gt Check the main PBA and cable harness e Is the message on the LCD Panel a standard error message gt Refer to section 4 3 3 Check the Paper Path e Is there a Paper Jam gt Remove any paper fragments caught in the paper path e Paper Jam occurs repeatedly at a specific point in the Paper Path gt Open the fuser cover Jam clear gt Dismantle the machine and carefully inspect the region where the jam occurs Especially check if paper fragments are caught in the Fuser 4 Print the Information Page Configuration e Try printing a test page from a computer gt lf there is an error check cables and driver installation 5 Check the Print Quality els there are a Print Quality Problem gt Refer to section 6 5 6 Check consumables toner etc eUsing the keys print the Test Pattern gt Expected life of various consumable parts compare this with the figures printed and replace as required 62 Service Manual Samsung Electronics Troubleshooting 6 1 2 Initial Inspection
114. nd tvpe in the application program vou use on vour PC 1 Press Menu The displav shows Paper Setting on the top line of the displav 2 Press the scroll button 40r p gt to display Paper Size on the bottom line and press Enter to access the menu item Use the scroll button lt or p to find the paper size you are using and press Enter to save it Press the button to scroll to Paper Type and press Enter to access the menu item Use the scroll button lt or b to find the paper type you are using and press Enter to save it o m e p To return to Standby mode press Stop Clear 4 2 3 6 Setting Sounds Only for SCX 4521F You can control the following sounds e Speaker You can turn on or off the sounds from the telephone line through the speaker such as the dial tone or a fax tone With this option set to Comm the speaker is on until the remote machine answers e Ringer You can adjust the ringer volume e Key Sound With this option set to On a key tone sounds each time a key is pressed e Alarm Sound You can turn the alarm sound on or off With this option set to On an alarm tone sounds when an error occurs or fax communication ends e You can adjust the volume level using the On Hook Dial button 4 2 3 7 Speaker Ringer Key Sound and Alarm Sound 1 Press Menu until Sound Volume appears on the top line of the display 2 Press the scroll button lt or p to scroll throug
115. nsulating revisiting pressure Must be no problem within 1 min at1000Vac 10mA Leaking Current under 3 5mA Running Current under 40A PEAK AT 25 C COLDSTART under 50A PEAK In other conditions Rising Time within 2Sec FallingTime over 20ms Surge Ring Wave 6KV 500A Normal Common 7 Environment Condition Operating temperature range 0 C 40 C Maintaining temperature range 20 C 40 C Preserving Humidity Condition 10 90 RH Operating atmospheric pressure range 1atm 8 EMI Requirement CISPR FCC CE MIC 9 Safety Requirement IEC950 UL1950 CSA950 C UL Semko EK CB CCC CCIB GOST EPA 3 6 2 HVPS Board The HVPS board creates the high voltage of THV MHV Supply Dev and supplies them to the developer part for making best quality printing image The HVPS part takes the 24V and outputs the high voltage such as THV MHV Supply Dev and the outputted high voltage is supplied to the toner OPC cartridge and transfer roller a Transfer High Voltage THV Input Voltage 24 V DC 15 10 21 6V 27 6V Out Voltage 1300KV 1 5 200NQ Load Out Voltage Trigger 6 5 vA Input Voltage Variation 5 Load Variation 5 Out Voltage Rising Time 100 ms Max Out VoltageFalling Time 100 ms Max Transfer Variation Voltage on Environment Variation 500 V 5000V Control Method on environment THV PWM ACTIVE transfer Active signal of environment sensing
116. ntal 11 8 Pels mm 300 x 300dpi b When Copy Vertial 11 8 Line mm Horizontal 23 6 Pels mm 600x300dpi ADF Vertial 23 6 Line mm Horizontal 23 6 Pels mm 600x600dpi Platen 3 Half Tone Gray Scale 256 Levels 4 Scan Line Time a Tx Normal 1 5 ms Line Fine 1 5 ms Line Super Fine 1 5 ms Line b Copy 1 5 ms Line c Scan Color 4 5msec line Gray 4 5msec line Mono 4 5msec line 5 Scanning Width MAX SCAN WIDTH 216 mm 8 5 inches Effective Scan Width 208mm 6 ADF Motor a Motor Spec MAM et 24VDC AAA 0 6A Peak EU Service Manual Samsung Electronics Svstem Overview 7 Motor Driver speed amp method a FAX Transmission Normal Mode 2000 pps Fine Mode 1000 pps Super Fine Mode 667 pps b Copy Job 667 pps 2 2 max 30sheets 50gf min 1sheets 20gf 8 Document Detect sensor a Type Photo interrupt b Position ADF PBA c LED max current 50mA max voltage 3 3V d Output Logic H No Paper Logic L Paper e Lever Sensor DOC ADF Lower Torsion Spring 9 Regi Detect sensor a Type Photo interrupt b Position ADF PBA c LED max current 50mA max voltage 3 3V d Output Logic H No Paper Logic L Paper e Lever Sensor DOC ADF Lower Torsion Spring 10 Document Scan sensor a Type Photo interrupt b Position ADF PBA c LED Max current 50mA Max Voltage 3 3V d
117. ntervals Digital Printer Digital Printer Digital Printer Check and Cause Solution 1 Transfer roller is contaminated 2 Pressure roller is contaminated 1 Perform the DRUM Cleaning Mode Print 2 or 3 times Run Self Test to remove the con tamination of the transfer roller 2 Replace the transfer roller if contaminated severely 3 Disassemble the fuser and clean the H R Heat Roller and P R Pressure roller And check the area between H R and Thermistor If contaminated clean the area not to be deformed 6 5 15 Blank Page Print out 1 l Description Blank page is printed Check and Cause Solution Bad ground contacts in OPC and or devel oper 6 5 16 Blank Page Print out 2 Remove contamination of the terminals of the developer and the unit c Description 1 Blank page is printed 2 One or several blank pages are printed 3 When the printer turns on several blank pages print Check and Cause Solution 1 Bad ground contacts in OPC and or developer 2 Abnormal solenoid 1 Remove contamination of the terminals of the developer 2 Perform the engine self test using Engine Test Mode to check if the Solenoid is normal refer to code 06 3 If not solved by the above directions 1 2 Replace the engine board 4 Turn the power off delete the data of PC and try printing a
118. nual Samsung Electronics Alignment and Adjustments 4 6 2 Printer Paper Path 1 After receiving a print command the printer feeds paper from the main cassette or manual feeder as required 2 The paper being fed passes the paper feed sensor Jam 0 occurs if the sensor is not operated within a certain time 3 Having passed the paper feed sensor the paper moves to the paper exit sensor via printing process Jam 1 occurs if the sensor is not operated within a certain time 4 The paper then passes through the paper exit sensor and out of the set Jam 2 occurs if the trailing edge of the paper does not pass the exit sensor within a certain time of the paper leading edge activating the exit sensor Engine Part Service Manual ea Samsung Electronics Alignment and Adjustments 4 6 3 Clearing Paper Jams When a paper jam occurs Paper Jam appears on the displav Refer to the table below to locate and clear the paper jam Message Location of Jam Paper Jam 0 In the tray Open Close Door Paper Jam 1 In the fuser area or around the toner Open Close Door cartridge Paper Jam 2 In the paper exit area Check Inside To avoid tearing the paper pull out the jammed paper gently and slowly Follow the instructions in the following sections to clear the jam 4 6 3 1 In the Tray 1 Remove the jammed paper in the tray by gently 2 Open and close the front door to resume
119. of the actuator exit or not and if the actuator is smoothly operated e Check if foreign matters and wire get caught in the actuator exit s operation 2 If the paper is stuck in the fuser disassemble the fuser and remove the jammed paper and clean the surface of the pressure roller with dry gauze 3 Remove the jammed paper after disassembling the fuser Clean the surface of the pressure roller with dry gauze e Remove the toner particles stained on the rib e Check the assemblage and performance of the exit Samsung Electronics Service Manual 65 Troubleshooting 6 2 5 Multi Feeding Description Multiple sheets of paper are fed at once Solution Check and Cause 1 Solenoid malfunction the solenoid does not work properly Perform Engine Test Mode Pick up Test 2 Pad Friction is contaminated with foreign matter oil 3 The face of paper is blended 1 Replace the solenoid if necessary 2 Clean the pad friction with soft clothe dampened with IPA Isopropvi Alcohol 3 Use the smooth paper 6 2 6 Paper rolled in the Fuser l e Description If contaminated at intervals of 57mm on the back of a paper Check and Cause Solution 1 Contamination of the pressure roller or heat roller Background Hot off set 2 Check the claw of the fuser whether it is unfit ted 1 After disassembling the fuser clean contami nation between the heat roller an
120. on backlight is off the mode is deactivated and the machine prints with the normal quantity of toner 4 2 3 10 Power Save Mode Power Save mode allows your machine to reduce power consumption when it is not in actual use You can turn this mode on and select a length of time for which the machine waits after a job is printed before it switches to a reduced power state 1 Press Menu until Machine Setup appears on top line of the display 2 Press the scroll button 4 or p until Power Save appears on the bottom line Press Enter 3 Press the scroll button 4 or p to display On on the bottom line and press Enter Selecting Off means that the power save mode is deactivated 4 Press the scroll button lt or p until the time setting you want appears The available options are 5 10 15 30 and 45 minutes Press Enter to save the selection To return to Standby mode press Stop Clear Service Manual Samsung Electronics Alignment and Adjustments 4 2 4 FLASH UPGRADE There are 2 methods to update the Flash Rom Local and Remote 1 Local Machine RCP Remote Control Panel mode This method is for Parallel Port or USB Port Connect the PC and activate the RCP Remote Control Panel to upgrade the Firmware lt Method gt How to Update Firmware using RCP 1 Connect PC and Printer with a Parallel Cable or a USB Cable 2 Run the RCP utility and select Firmware Update 3 Search for t
121. oor can generate static electricity sufficient to damage an ESD 1 4 Super Capacitor or Lithium Battery Precautions 1 Exercise caution when replacing a super capacitor 3 Super capacitor or Lithium batteries contain toxic or Lithium battery There could be a danger of substances and should not be opened crushed or explosion and subsequent operator injury and or burned for disposal equipment damage if incorrectly installed 2 Be sure to replace the battery with the same or 4 Dispose of used batteries according to the equivalent type recommended by the manufacturer manufacture s instructions Service Manual EH Samsung Electronics Reference Information 11 Reference Information This chapter describes the reference information for applving this training manual and it is consist ed of the tool list the abbreviation table the outline of model and so on 11 1 Troubleshooting Tool The following tools are recommended safe and easy troubleshooting as described in this service manual e DVM Digital Volt Meter Standard Indicates more than 3 digits B A antena aa aitee Standard type type M3 long M3 short M2 long M2 short Tweezers _ Standard For general home use small type Standard For general home use for medical service e Cleaning Equipments Standard An IPA Isopropvi Alcohol dry wipe tissue or a gentle neutral detergent and l
122. or the SCX 4321 press Enter and then the scroll button 4 or gt When the cursor is not under the AM or PM indicator pressing the xx or ff button immediately moves the cursor to the indicator For the SCX 4321 press the scroll button 4 or p to move the cursor to the indicator You can change the clock mode to 24 hour format e g 01 00 PM as 13 00 5 Press Enter when the time and date on the display is correct When you enter a wrong number the machine beeps and does not proceed to the next step If this happens just reenter the correct number 6 To return to Standby mode press Stop Clear 4 2 3 4 Changing the Clock Mode You can set your machine to display the current time using either a 12 hour or 24 hour format 1 Press Menu until Machine Setup appears on the top line of the display 2 Press the scroll button lt or p until you see Clock Mode on the bottom line and press Enter The clock mode currently set for the machine displays 3 Press the scroll button lt or p to select the other mode and then press Enter to save the selection 4 To return to Standby mode press Stop Clear Service Manual Samsung Electronics Alignment and Adjustments 4 2 3 5 Setting the Paper Size and Tvpe After loading paper in the trav vou need to set the paper size and tvpe using the control panel buttons These settings will applv to copv and fax modes For PC printing vou need to select the paper size a
123. ormal output from the HVPS 6 5 6 Dark Image or a Black 1 Check if the Toner Save mode is off 2 Replace the developer cartridge and try to print out 3 Wait 30 minutes after printer is powered on before you start printing 4 Clean up the contaminated area by the toner 5 Replace the HVPS if the problems are not solved by the above four directions e Description The printed image is dark Check and Cause Solution 1 No charge voltage in the engine board 2 Charge voltage is not turned on due to the bad contacts between power supply in the side of the Developer and charge terminal of HVPS 1 Clean the high voltage charge terminal 2 Check the state of the connector which connects the engine board and HVPS 3 Replace the HVPS if not solved by the above direction 1 and 2 ga Service Manual Samsung Electronics Troubleshooting 6 5 7 Uneven Density Description Print density is uneven between left and right Digita Digita Digita Digita Digita Check and Cause Solution 1 The pressure force on the left and right springs of the transfer roller is not even the springs are damaged the transfer roller is improperlv installed or the trans fer roller bushing or holder is damaged 2 The toner level is not even on the devel oper roller due to the bad blade 1 Replace both the left and right Spring Holder 2 Occur in
124. ough the Actuator Feed Check and Cause Solution 1 If the recording paper is jammed in front of or inside the fuser 2 If the recording paper is stuck in the discharge roller and the fuser just after passing through the Actuator Feed Feed Actuator may be defective 1 Replace the SMPS 2 Reassemble the Actuator Feed and Spring Actuator if the returning is bad 6 2 4 JAM 2 BIN PATH e Description 1 Recording paper is jammed in front of or inside the fuser 2 Recording paper is stuck in the discharge roller and in the fuser just after passing through the Actuator Feed Check and Cause Solution 1 If the paper is completely fed out of the printer but Jam 2 occurs Exit sensor is defective e After the paper is completely discharged actuator Exit should return to the original position to shut the photo sensor Sometimes it takes longer hour than it should and does not return 2 If the paper is rolled in the Fuser Roller e This occurs when a Guide claw is broken away or transformed e It occurs when the Spring of a Guide claw is broken away or transformed e It occurs when the Heat Roller or Pressure Roller is seriously contaminated with the toner 3 Paper is accordion in the fuser 1 Check if the exit sensor actuator is defective e Check if the actuator exit is unformed Check if the lever part is unformed in shape Check whether burrs occur in the assembly part
125. printing pulling it straight out 4 23 Service Manual Samsung Electronics Alignment and Adjustments 4 6 3 2 In the Fuser Area or Around the Toner Cartridge NOTE The fuser area is hot Take care when removing paper from the machine 1 Open the front door and pull the toner cartridge out 3 Replace the toner cartridge and close the front lightly pushing it down door Printing automatically resumes 2 Remove the jammed paper by gently pulling it straight out Service Manual EZI Samsung Electronics Alignment and Adjustments 4 6 3 3 In the Paper Exit Area 1 Open and close the front door The jammed paper 4 Remove the jammed paper bv gentiv pulling it automaticallv exits the machine straight out If the paper does not exit continue to step 2 2 Gentiv pull the paper out of the output trav NOTE Inside of the machine is hot Take care when removing paper from the machine 3 If there is any resistance and the paper does not move when you pull or if you cannot see the paper in the output tray open the rear door by pulling the tab on it 5 Close the rear door 6 Open and close the front door to resume printing Service Manual 4 25 Samsung Electronics Alignment and Adjustments 4 6 3 4 Tips for Avoiding Paper Jams When Printing on the A5 sized Paper If paper jams occur frequently when you print on A5 sized paper 1 Load the paper into the tray
126. problem is not due to computer software or driver settings 2 Replace the printer cable If the problem is not solved even after the cable is replaced check the amount of the remaining toner refer to Toner Cartridge Service 7 6 Page 7 25 3 Check that the connection between PC and printer port are correcct If you use windows check that the printer driver in the controller is set up correctiv set up the correct port is selected and Use On line is selected in the driver If the printer driver is properly set up try printing a test page from the driver proper ties Check in which program printing is not working Try opening Note Pad and printing If the printer is not working in a certain program adjust the setup within that program Sometimes the printout is normal within the Windows basic programs but it s not working in a particular program In this case uninstall and re install the new driver If the printer is not working in the Windows basic programs and you are printing using the parallel port check the port setting in CMOS is on ECP and that the address is IRQ 7 and 378 for parallel port 1 Try using USB instead of parallel or vice versa 4 If you have other devices that need to share the printer port try temporarily disconnecting these devices and perhaps even uninstalling their drivers to ensure the printer works by itself If you are using a USB hub try connecting directly to the back of the PC instea
127. propriate Service Manual EI Samsung Electronics Troubleshooting 6 3 6 Cover Open e Description The Cover Open message appears on the LCD even when the print cover is closed Check and Cause Solution 1 The Open Cover microswitch may be stuck or faulty 2 The tab on the front cover may be damaged or broken 3 Check the connector and cables between HVPS and main PBA 1 Use TECH mode cover sensor test to check cover switch operation Check and replace switch if necessary 2 Replace the front cover 3 Replace the Main Control board or HVPS as necessary 6 3 7 No error message when the cover is open e Description The Cover Open message does not appears on the LCD even when the print cover is open Check and Cause Solution 1 The Open Cover microswitch may be stuck or faulty 2 Check the connector and cables between HVPS and main PBA 1 Use TECH mode cover sensor test to check cover switch operation Check and replace switch if necessary 2 Replace the Main Control board or HVPS S W as necessary EU Service Manual Samsung Electronics Troubleshooting 6 3 8 Defective motor operation e Description Main motor is faulty and paper does not feed into the printer resulting in Jam 0 Check and Cause Solution 1 The main motor harness or Motor PCB may be faulty 6 3 9 No Power 1 Check the motor harnesses an
128. rs 12hours Language English FRANCAIS Espanol Portugues Deutsch ltaliano Pycckn Norsk Polski Suomi Magyar Dansk cestina Svenska Turkse 15 language English Power Save On Off 5 10 15 30 45 min Ignore Toner On Off USB Mode Fast Slow gi Service Manual Samsung Electronics 1st level 2nd level 3rd level Alignment and Adjustments Default Value RETURN lt RETURN left right amp amp Enter p 3 Copy Setup lt q Default Change p 14 character Default Change left right amp amp Enter Darkness Light Normal Dark Normal Original Tvpe Text Text Photo Photo Text Reduce Enlarge Original 100 100 LGL LTR 78 LGL A4 83 A4 A5 71 A4 LTR 94 EXE LTR 104 A5 A4 141 25 50 150 200 400 Custom 25 400 No of Copies 1 99 Timeout 15 30 60 180Sec Off 4 Copy Feature Favorite copy Off Clone Copy Collate Autofit 2 side in 1 Pg 2UP 4 UP Poster 4Off gt Clone Copy Collate Autofit ID Card Copy 2 UP This will set to 2UP 4 UP This will set to 4UP CO N OD oO Ro po Poster Samsung Electronics Service Manual Alignment and Adjustments lt continue
129. t wait for a time out Samsung Electronics Service Manual Ed Troubleshooting 6 11 Windows Problems Problem Solution After installing PortThru the print server name 1 Verifv that the printer power switch is turned on and the READV is not displaved under New Print Server in message is displayed on the printer front panel SyncThru 2 Verify that the LAN cable is plugged into the PortThru card 3 There are 2LEDs on the PortThru card One should flash irregularly and the other should be on If this is not the case ensure that the network card is properly installed and the PCB an cable connectors make a good connection If the problem continues check the network cable socket by using a different cable or socket If the problem continues replace the network card Confirm that the print server and the PC which searches for the New Print Server is on the same LAN correct IP and subnet mask settings If you want to search for a New Print Server your PC and the print server should be on the same LAN EN The print server name is displaved but the test Using the front panel menus print the Network configuration If the page is not printed Network menu is not displayed or the configuration page is not printed turn off the printer ensure the network card is properly fitted then turn it back on and try again If the problem continues replace the network card SyncThru indicates that firmware upgrade is Before attemptin
130. te 150 sh 7 Polygon Motor Polygon Mirror 6 LD Driver circit eet Motor Driver er Driver Qolennid Rubt LD Laser Diode 2 Pick Cu MUIE Protector E me 1r more ruji on up vowcity 94 8731mm Sec Process 93 0667mm sec m Paper detecting Sensor Photo Sensor 2 Paper Size Sensor None E ee aoe ma A EJ Service Manual Samsung Electronics Svstem Overview 3 3 Deverope Process Developing Method Non magnetic 1 element contacting method Toner Non magnetic 1 element shatter type toner Toner Qty 35gf 60gf 1k 3k The life span of toner 1k 3k sheets ISO 5 Coverage Toner Residual Sensor None OPC Cleaning Use the conventional cleaning blade Handling of wasted toner Discard by collecting waste toner at waste toner bin OPC Drum Protecting Shutter None Classifying device for toner cartridge ID is classified by interruption of the frame channel Development Roller type conductive elastic roller Doctor BLADE Type Regulating toner layer by pressure Charge Roller Type Conductive Roller Contact Charge 3 3 1 Fuser Specification 1 Heat Lamp Heat Lamp Terminal Shape Terminal Single Type Voltage 120 V 115 5 220 V 230 5 Capacity 600 Watt 30 W Light Qty Distribution 140 Life 3000 Hr 2 Thermostat Thermostat Type Non Contact type THERMOSTAT Control Temperature 150 5 C 3 Thermistor Thermistor Type HF ROO60
131. ter weighs 10 4kg including toner cartridge and cassette Use safe lifting and handling techniques Back injury could be caused if you do not lift carefully 4 Ensure the printer is installed safely The printer weighs 10 4Kg ensure the printer is installed on a level surface capable of supporting its weight Failure to do so could cause the printer to tip or fall possibly causing personal injury or damaging the printer 5 Do not install the printer on a sloping or unstable surface After installation double check that the printer is stable 1 4 Service Manual Samsung Electronics Precautions 1 3 ESD Precautions Certain semiconductor devices can be easily damaged by static electricity Such components are commonly called Electrostatically Sensitive ES Devices or ESDs Examples of typical ESDs are integrated circuits some field effect transistors and semiconductor chip components The techniques outlined below should be followed to help reduce the incidence of component damage caused by static electricity Caution gt gt Be sure no power is applied to the chassis or circuit and observe all other safety precautions Immediately before handling a semiconductor component or semiconductor equipped assembly drain off any electrostatic charge on your body by touching a known earth ground Alternatively employ a commercially avail able wrist strap device which should be removed for your p
132. that the SPEAKER is connected correctly 1 If the telephone cord is OK but there is no dial tone try plugging a normal telephone into the wall socket If this is OK then replace the LIU B d 2 If you cannot hear the OHD CLICK sound the OPE Ass v may be defective Replace the OPE Ass v After key click sound sets to ON and you can hear click sound 3 Check the Speaker connection and the harness between the LIU and the Main PBA replace as necessary 4 Use Tech mode Modem Test to check that the speaker and amplifier are working Replace the LIU and Main B d in sequence Notes Product supports MF DIAL type only Samsung Electronics Service Manual 6 23 Troubleshooting 6 6 3 Defective FAX FORWARD RECEIVE Description FAX FORWARD RECEIVE is not functioning Check and Cause Solution 1 Check that you can hear a dial tone by pressing OHD 2 Check that you can hear a RECEIVE tone when MODEM testing in TECH Mode 6 6 4 Defective FAX FORWARD 1 If MODEM testing is normal and there is no dial tone then try replacing the LIU B d 2 If testing the MODEM shows a fault replace the Main B d Description RECEIVE is functioning but FORWARD is not functioning or received data is corrupt Check and Cause Solution 1 Check if there is a NOISE line by pressing on hook dial and listening 2 Check that the destination fax machine can receive forwarded faxes by
133. the end of its life 14 000pages This means that the life of the mechanical parts in the cartridge has expired this is not an indication of toner remaining Solution After printing about 15 000 pages in a worst case scenario the waste toner collector might overflow and it may cause the system to fail Also after 15 000 pages the OPC drum surface will be becoming worn and print quality will degrade print images will become misty It is therefore necessary to replace the cartridge even though there may be toner left in it When this message occurs there are approximately 1 000 pages left 6 9 4 4 Replace Drum Explanation The toner cartridge mechanical life is expired Solution Replace the cartridge Service Manual Samsung Electronics Troubleshooting 6 10 Software Problems Causes and Solutions 6 10 1 The printer is not working 1 e Description While Power turned on the printer is not working in the printing mode Check and Cause Solution 1 Run Self Test Mode using the menu buttons print the test page 2 Check that the PC and the printer are properly connected and that the toner cartridge installed correctly 3 Printing is not working in the Windows 4 Check that the printer cable is directly connected to the printer 1 If the test print works that means there are no problems in the printer itself If the test printing does not work that means the printer is faulty and the
134. tomer Benefits Sales Points Compact Size 22ppm A4 22ppm Letter fastest speed in its price class Favorite Copy ID Card Copy Toner Save Key Specification up to 22ppm A4 Up to 22ppm Letter 150 sheets Multi Purpose type paper input 50 sheets Paper Output 3 000pages toner capacity 600dpi Print Copy Resoulusion Samsung Print Language 16MB System memory 30 ADF 33 6 Kbps Fax Modem 100 Speed Dial 72 Hour Battery Back up Samsung Electronics Service Manual BJ Product Specifications 2 2 Specifications e Product Specifications are subject to change without notice See below for product specifications 2 2 1 General Specifications Descriptions SCX 4321 SCX 4521F Major Features Copier Print Scan Fax SCX 4521F Net Dimension WxDxH 438 W 374 D 368 H 17 2x14 7x14 5 Net Weight Inc Toner Cartridge 10 4kg CPU Chorus 2 66MHz LCD 2 Line x 16 characters 2Line x 8 characters for china and korea Toner Save Yes With toner save button O Interface USB1 1 Compatible with USB 2 0 IEEE 1284 Parallel Network Interface No OS Compatibility Windows 98 Me NT4 0 2000 XP Various Linux OS via USB interface only including Red Hat 8 0 9 0 Fedora core 1 3 Mandrake 9 0 10 2 and SuSe 8 2 9 2 Mac 10 3 Power Requirement 110 127 VAC 50 60 Hz 4 5A 220 240 VAC 50 60 Hz 2 5A Power Consumption Sle
135. ty connected and that the printer can print correctly cables If using a parallel cable check that the par allel port is properly configured in the BIOS 2 Check that the driver is installed properly 2 If printing is OK check that the Scan driver is also installed Refer to User s Manual 3 Check that the copy function operates normally 3 If the copy function works replace the Main PBA If the copy function doesn t work replace the CIS Ass v and try again 6 8 2 Poor Quality of PC Scanned images Description The image PC scanned is not clear or bad Check and Cause Solution 1 Use TECH mode to carry out a shading test and 1 If the CIS waveform form is abnormal replace the examine the waveform printout CIS Ass y 2 Check if the resolution is set too low in PC Scan 2 Teach the user about scanner resolution refer to options Refer to User s Manual the User Guide Service Manual 6 29 Samsung Electronics Troubleshooting 6 9 Toner Cartridge Service Only toner cartridges supplied by Samsung should be used Printing defects or set damage caused by the use of non approved toner cartridges or un licensed toner refills are not covered by the guarantee 6 9 1 Precautions on Safe keeping of Toner Cartridge Excessive exposure to direct light for more than a few minutes may cause damage to the cartridge 6 9 2 Service for the Life of Toner Cartridge If the printed image is light due to the ton
136. ve the two screws securing the Scan Motor and remove it Scan Motor Bracket Scan Motor Service Manual EA Samsung Electronics Disassembly and Reassembly 5 13 Middle Cover 1 Before you remove the Middle Cover you should 4 If necessary take out the Stacker remove Scan Ass v Refer to the 5 9 2 Remove the five screws securing the Middle Cover as shown below 3 Carefully release the Middle Cover from the Main PBA as shown below Middle Cover 5 14 Service Manual Samsung Electronics Disassembly and Reassembly 5 14 HVPS 1 Before you remove the HVPS you should remove 4 Unplug the Connector from the HVPS Scan Ass v Refer to the 5 9 Middle Cover Refer to the 5 13 2 Remove the three screws securing the Sheet and remove it 3 Remove the three screws securing the HVPS and remove it with the HVPS Ground as shown below Service Manual EH Samsung Electronics Disassembly and Reassembly 5 15 Main PBA 3 Remove the six screws securing the Main PBA and 1 Before you remove the Main PBA you should remove it Main PBA Scan Ass v Refer to the 5 9 Middle Cover Refer to the 5 13 remove 2 Unplug the all Connectors from the Main PBA as shown below Thermister SMPS HVPS_ z
137. y and Reassembly 5 8 Left Cover 1 Before you remove the Left Cover you should 4 Unplug the Speaker Connector from the Main PBA remove Front Cover Refer to the 5 4 Rear Cover Refer to the 5 6 2 Remove the one screws securing the Left Cover 5 If necessary remove the two screws securing the Speaker and remove it 3 Apply light pressure to the back of the Left Cover and pull it to the leftt side in the direction of arrow as shown below Left Cover Left Cover NN Speaker Service Manual Samsung Electronics Disassembly and Reassembly 5 9 Scan Ass y 1 Before you remove the Scan Ass v you should 4 Release the Scan Ass v in the direction of arrow as remove shown below Rear Cover Refer to the 5 6 Right Cover Refer to the 5 7 Left Cover Refer to the 5 8 2 Remove the two screws from the Middle Cover and remove the screw securing the Ground Cable Middle Cover 3 Unplug the three Connectors ADF Scan Motor OPE and Flat Cable CIS as shown below 58 Service Manual Samsung Electronics Disassembly and Reassembly 5 10 ADF Housing 1 Before you remove the ADF Housing you should 4 Remove the two screws securing the ADF Ass v remove and remove it At that time carefully release the Scan Ass y Refer to th

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