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1. OPE Cover Service Manual EO Samsung Electronics Disassembly and Reassembly 5 12 Platen Housing 1 Before you remove the Platen Housing you should 4 Push the Holder in the direction of arrow and remove remove the Belt as shown below The CIS will Scan Ass y Refer to the 5 9 come out at the same time ADF Housing Refer to the 5 10 OPE Unit Refer to the 5 11 2 Remove the five screws from the Scan Upper and remove it from the Scan Lower as shown below Scan Upper 5 Release the Belt and Flat Cable from the CIS Film Cable EH 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 y and remove it Sensor as shown below E Scan Motor Ass y ky lO I I a Sa Wees Sg Ae J SC Pa I Ba i Wi dl Ba ka a a n SC e RI i Fa Ban EE f 7 If necessary remove the two screws securing the Scan Motor and remove it Scan Motor Bracket Scan Motor Service Manual ES Samsung Electronics Disassembly and Reassembly 5 13 Middle Cover 4 If necessary take out the Stacker 1 Before you remove the Middle Cover you should remove Scan Ass y Refer to the 5 9
2. 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 Main Fan Test 1 On 2 Off next test selected 4 SMPS FAN 1 On 2 Off next test selected 1 1 LSU Error Test 1 On 2 Off next test selected 2 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 3 1 Therm ADC 170 1 On 2 Off maintain the fusing temp 2 Therm ADC 160 1 On 2 Off maintain the fusing temp 3 Therm ADC 150 1 On 2 Off maintain the fusing temp 4 Therm ADC 140 1 On 2 Off maintain the fusing temp 5 Therm ADC 130 1 On 2 Off maintain the fusing temp 6 Therm ADC 125 1 On 2 Off maintain the fusing temp 7 Therm ADC 120 1 On 2 Off maintain the fusing temp 8 Therm ADC 115 1 On 2 Off maintain the fusing temp 9 Therm ADC 110 1 On 2 Off maintain the fusing temp 4 1 MHV Test 1300V 1 0On 2 Off 2 Dev Bias Test 350V 1 0n 2 Off 3 THV Test 1300V 1 0On 2 Off 4 THV Test 1 0n 2 Off Service Manual Samsung Electronics Alignment and Adjustments 4 5 3 Detail Description Engine Test Mode Function Name
3. 5 4 Service Manual Samsung Electronics Disassembly and Reassembly 5 6 Rear Cover 1 Remove the four screws securing the Rear Cover 3 To remove the Rear cover make sure the right and remove it Power Switch doesn t get jammed to the Rear Cover as shown below 2 Open the Jam Cover 4 If necessary remove the Jam Cover in the direction of arrow as shown below Rear Cover Service Manual 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 Ea Service Manual Samsung Electronics Disassembly 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 l
4. 1 Disassemble the fuser and remove the contaminated toner particles on the roller and clean the foreign matter between Thermistor and Heat roller A Caution can be deformed 6 5 13 Stains on the Face of Page e Description The background on the face of the printed page is stained pee tte att Check and Cause Solution Digital Printer a Digital Printer 1 Toner leakage due to improperly sealed 1 Replace the developer cartridge devel DigitakPrinter SE DigitalPrinter Digital Printer on the face of page will occur H 2 If the transfer roller is contaminated stains 2 If the transfer roller is contaminated run DRUM Cleaning Mode Print 2 or 3 times And perform Self Test 2 or 3 times to remove contamination Samsung Electronics Service Manual 6 24 Troubleshooting 6 5 14 Stains on Back of Page e Description The back of the page is stained at 47 mm intervals Digital Printer Digital Printer Digital Printer Check and Cause Solution 1 Transfer roller is contaminated 2 Pressure roller is contaminated 6 5 15 Blank Page Print out 1 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 bet
5. 0 figure If character alphabet Type 1 Controlled by Company It can be commonly used for all kinds of product SEC produce Mostly electronics Parts Type 2 Controlled by Division It is used or one produce Mostly Mostly mechanical Parts A S privately used part It is only used for A S Ass y part Assembled by more than 2 Parts If necessary part is not A S Part Ass y part including necessary par can be used It is shown in the diagram and drawing of SVC manual Ass y part and A S privately used Part is distinguished by part Code and Description The are inscription type 2 It is recognized by Part character and front side of description DIVISION PART CODE DESCRIPTION AIS Private ir EA AS JB81 00039A AS USE ASSY Par nang aaa MEG JB75 00068A MEC CHUTE ASSY Part Deen DBA mv JB92 01131A PBA MAIN CONTROLLER ASSY Part DEE MEAS JB97 01089A MEA UNIT PULLEY IDLE Samsung Electronics Service Manual Exploded Views amp Parts List 7 1 Main 7 2 Service Manual Samsung Electronics Exploded Views amp Parts List 7 2 Cover Housin Service Manual 7 3 Samsung Electronics Exploded Views amp Parts List 7 3 Front Cover 74 Service Manual Samsung Electronics Exploded Views
6. 32 Them ADC 160 and Target value on the bottom line output temperature from 33 Them ADC 150 Target value is limited from 191 C to 80 C thermistor and ADC 35 Them ADC 140 36 Them ADC 130 37 Them ADC 125 38 Them ADC 120 39 Them ADC 115 40 Them ADC 110 41 MHV Test 1300V These Functions are provided to check whether the MHV On Off 42 Bias Test 350V control of the HVPS is functioning correctly Dev Bias On Off 43 THV Test 1300V THV EN NEG On Off 44 THV Test THV On Off 4 18 Service Manual Samsung Electronics Alignment and Adjustments Paper Path and Clearing Paper Jams 1 Copy amp Scan Document Path ADF ROLLER PICK UP ROLLER COVER DPEN O UT Y EXIT ROLER ADF UPPER IN TE i FEED couse CIM o ADF LOWER SI SCAN NUPP UPPER ITT BAR ADF GLASS Samsung Electronics Service Manual gg 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 ifthe trailing edge of the pa
7. 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 EH 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 and connectors replace if defective If the problem persists replace the main PBA Note Check motor operation using Engine Test Mode 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 ne
8. Middle Cover Refer to the 5 13 Main PBA as shown below Thermister 2 Unplug the two Connectors from the SMPS and remove it as shown below 3 Remove the four screws securing the Fuser and Samsung Electronics Service Manual Disassembly and Reassembly 6 As shown below rotate the Holder to the direction 8 First remove the two screws securing the of the arrow which is attached to the Exit Roller Thermostat and then take out the Thermostat and F Down and Exit Gear DR38 25 release the CBF Harness as shown below The Roller Main Roller FR F Down Holder gt Spring will come out at the same time E Exit Roller F Down N x Roller_FR SI Roller Main 9 F Down Holder Holder Za As Zy Holder Spring Exit Gear Y 9 Remove the screw securing the Thermistor Harness and take out the Thermistor as shown below Notice If you don t follow the direction above the Spring will come out forcing the Roller_Main Roller_FR F Down Holder inside the Frame Ass y Thermistor 7 To remove the Thermo Cap first unlatch the hooks using a flat blade screwdriver in the direction of arrow and then pull the Thermo Cap as shown below Service Manual E Samsung Electronics Disassembly and Reassembly 10 First unlatch the hooks and remove the Lamp Cover right and left as shown below
9. N ow N Z gt IT to ko Alo Parts List Service SA service available SNA service not available JC63 01203A TRAY CASSETTE R JC63 01189A TRAY CASSETTE _L N wo al N wo O Z gt N gt o JC96 04219A ELA HOU COVER REAR JC63 01178A COVER REAR JC63 01192A COVER JAM N gt golL gt gt N gt N 4 j mn SPRING ETC LEVER SENSOR F E JC61 01703A RAME M_BASE JC97 02670A MEA UNIT KNOCK_UP N gt gt 4 i 0p gt N A O 3 5 7 mn 4 N al o Diop NIN a al N 0p 5 24 5 22 5 2 3 5 5 7 Ip n n gt gt gt al wm gt 5 i 5 JC66 00808A GEAR FEED DR 41 gt N al O gt i gt N al 5 9 FOOT FRONT 5 10 5 11 5 12 5 13 513 1 5 14 gt gt Kai gt gt 2 gt 5 15 JC66 01257A ACTUATOR EMPTY 5 16 JB61 00076A SPRING ETC TORSION DOC CC2 F gt gt 5 18 JC66 00813A GEAR TRANSFER 5 19 JC66 01218A ROLLER TRANSFER gt gt 5 20 5 20 5 21 5 22 6 1 6 1 1 6 1 2 6 1 24 6 1 22 6 1 23 6 1 24 6 1 25 6 1 26 6 1 2 7 MOTOR STEP ADF 7 61 28 JC66 00556A__ IMPELLER ADF_ 1 SA 7 6 1 2 9 JC61 011784 BRACKETM GEARR________________ 1 SA 7613 JC92 01845A_ PBA SUB ADF TSA 7 614 JC63 006674 GROUND P ADF Ir sa 7 6 1 5 JC39 00407A CBF HARNESS ADF td SA 1 JC66 00560A ROLLER DRIVE JB72 00819A MO BUSH JC66 00460A HAFT M FEED GEAR
10. 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 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 mach
11. 100mVp p or less 500mVp p or less 7 Maximum output 2 5W 36W 8 Peak output 4W 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 CH2 24V System 1 Stand By 0 6A 1 3A ANG 70Wh 2 Printing 0 8A 1 9A AVG 400Wh 3 Sleep Mode 0 5A 0 3 A AVG 12Wh Service Manual 3 16 Samsung Electronics System Overview 4 Power Cord Length 1830 50mm 5 Power Cord Switch Exist 6 Feature Withstand Resistance 100 pQ or more at DC 500V Insulating 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 Th
12. 2 Remove the five screws securing the Middle Cover as shown below 3 Carefully release the Middle Cover in the direction of arrow as shown below Middle Cover Samsung Electronics Service Manual Disassembly and Reassembly 4 Unplug the Connector from the HVPS and remove Scan Ass y Refer to the 5 9 1 Before you remove the HVPS you should remove 5 14 HVPS they are not lost Nex N 1 NA Y Notice Be awer of the Terminals TR L to ensure CM Service Manual gg E TED 7 unplug the connector DC Fan from the HVPS as Middle Cover Refer to the 5 13 shown below remove it 2 Remove the three screws securing the Sheet and 3 Remove the three screws securing the HVPS and Samsung Electronics Disassembly and Reassembly 5 15 Main PBA 1 Before you remove the Main PBA you should 4 Remove the four screws securing the Shield Main remove PBA and remove it Scan Ass y Refer to the 5 9 Middle Cover Refer to the 5 13 2 Unplug the all Connectors from the Main PBA as shown below 5 The connectors are located as shown below Thermo ADF Motor DEBUG LSU Scan Motor CIS Exit g CE e
13. DIGITAL LASER MER SCX 4725FN Series SCX 4725FN XAZ Basic Model SCX 4725FN S F R VI C Manual Bes DIGITAL LASER MFP SCX 4725FN Series The keynote of Product Machine Life 50 000Pages Cpu Chorus M Device Memory 32MB Resolution 1200x1200dpi Option N A Printing Speed 24ppm A4 LTR Print Language PCL Path Type C Path Cassette Capa 250sheets Outlet Stacking Capa 100sheets Toner Cartridge initial 1 5K sales 3K ADF Capacity 30sheets Scan Method 600 dpi Color CIS Copy Speed SDMC 22Cpm Ltr MDMC 7Cpm Ltr Interface USB2 0 1 Precautions 1 1 Safety Warning 11 1 2 Caution for safety 12 1 3 ESD Precautions 15 1 4 Super Capacitor or Lithium Battery Precautions 1 5 2 Product Specification 2 1 Product Overview 2 1 2 2 Specifications mk PR PN A awe a E 2 3 Model Comparson Table ee 28 3 System Overview 3 1 System Layout ee 8 1 3 2 Engine H W Specification 35 3 3 Deverope Process 3 12 3 4 Samer Pat ee so 8373 3 5 OPE Operational Panel ament rro 91D 36 SMPS 8 HVPS pe e ee y T 3 7 FUSER AC POWER CONTROL 3 18 4 Alignment and Adjustments 41 UserMode sre se we d1 4 2 Tech Mode and Setting 44 43 Control P
14. mn gt 8 1 27 8 1 3 8 1 8 1 5 SHAFT CIS 8 1 6 8 1 7 7 8 1 8 JB72 00763A PMOPULLEY TSA 7819 JB61 00109 SPRINGETCBELT_____________ _ 1 SA 7 8 1 11 JB96 01381A__ ELAUNIT CORE CT 2 SA NIN WM Wa gt gt gt gt gt TNJATSTATSTAISTATSTATSTNTSTATISTNINTN do 00 SIS alo ala N lo N Parts List Service SA service available SNA service not available 8 1 12 4302 001183 BATTERY NIH 2ND mn gt 8 1 13 JC96 02417A ELA HOU FULL SENSOR HARNESS 8 1 14 6602 001067 BELT TIMING GEAR Wa gt gt 8 JC97 02805A MEA UNIT SCAN UPPER Wad gt 8 2 1 JC63 00661C COVER SCAN UPPER mn gt 8 2 2 JB68 00644A LABEL P SHADING 8 2 3 JB01 00002A GLASS PLATEN an PITS 8 2 4 JB01 00001A GLASS ADF n TATNTNTNTNTNTNIN to 0 o N mn gt N o JC63 01213Q COVER OPE Ka PIS SIT o o n 9 JC73 00202A RUBBER TEL JC73 00203A RUBBER SCROLL JC92 01727A PBA SUB WHITNEY_OPE SI o IN 0p gt N co al JC64 00054F KEY COPY 0p gt N co O JC63 00076A COVER WINDOW SF 530 mn gt J to N JC64 00053G KEY TEL mn gt JC64 00157D KEY SCAN TO Y co CO Wa JC64 00058A KEY M TONER SAVE nin 9 11 JC64 00114A KEY M_START 9 12 JC64 00060F KEY FAX NIM 9 13 JC64 00056G KEY SCROLL mn 9 10 JC64 00187A KEY M STOP 9 14 JC39 00412A CBF HARNESS OPE n n nin Y mn PLS S gt gt gt gt gt
15. 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 See the user guide f 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 KI 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
16. e LEVER SENSOR SCAN Scan Lower Torsion Spring 11 2 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 2 Key Description 1 Common 3 4Key Dialing and Option Input Start Starting Fax Copy Job Stop Clear Cancel Current Job Return to default Menu Option select Upper Level Return to upper level menu Enter Option select Execute gt Next menu or Next option item 4 Previous menu or Previous option item 2 Save Toner Save TONER SAVE MODE select 3 Copy Reduce Enlarge Select ZOOM ratio when copy No of Copies Select the number of copies Original Type Change Copy Modes Text Text Photo Photo Darkness Change the Darkness of the Copied image Light Normal Dark Favorite Copy Select one of the predefined Copy templates 4 Fax Resolution STANDARD gt FINE gt SUPER FINE gt PHOTO gt COLOR Phone Book Search the user defined Phone number Broadcasting When sending FAX data to many place in the same time On Hook Dial On Hook Dial Redial Pause Last number Redial Pause 5 Scan Scan to select scan to PC scan to FAX scan to E mail function 3 LCD Part Number of Characters 16 Characters x 2 line Clock Date display System Status display Alarm Error Message display Function Dialog Mes
17. gt gt 9 15 9 16 10 0 10 1 mn 10 2 JC60 00023A SPACER GEAR 10 3 JC66 00804A GEAR RDCN 139 83 10 4 JC61 01708A BRACKET P_MOTOR Diop 10 5 10 6 10 7 10 8 10 9 10 10 10 11 11 0 MA 11 2 11 3 11 4 ELA HOU FUSER 12 2 12 4 12 5 12 6 128 12 9 12 10 12 11 12 12 NIN DID JC96 04234Q ELA HOU OPE JNJN PI mn gt ATSTATSTATATATSTATATATSTATATATSTATSTSATATATSTATSTN to mn gt N pat al mn gt N a N o 0p gt STATS a N EN n gt a N wo mn gt on gt ili 0p gt EA N N mn gt mn gt NIN op Z gt Z ARIEL ILL ZiFi gt gt gt zZ gt Parts List Service SA service available SNA service not available 12 13 12 14 12 15 12 16 A247 12 18 12 19 12 20 Z gt ol gt nlnln aln 2 eg mn gt 12 22 12 23 12 24 12 25 12 26 SPRING ETC PR 7300 12 27 12 28 12 29 12 30 12 31 12 32 12 21 JC61 00887A BUSH M HR R_R2 Wa gt gt NO NN WN SISIS 5 mn gt 12 33 JC61 01719A HOLDER EXIT R 12 34 JC66 00810A GEAR EXIT_DRV17 mn mn gt 12 35 12 36 12 37 12 38 12 39 Wad mn gt 12 40 13 13 8 13 13 9 13 9 2 PAD FRICTION 1393 13 94 13 10 13 11 13114 13 112 13 113 13 12 13 13 13 14 13 15 13 16 13 18 7 13 19 JC70 00307A_ IPR P EARTHTRANSFER 1 SA 17 1324 JC61 01715A__ PLATE PIDLEHOLDER 1 SA 713 251 JC61 017184 HO
18. 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 2 Printing error occurs even if there is enough space in 2 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 3 Check the parallel port related items in the CMOS 3 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 system to print 4 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 10 3 Abnormal Printing e 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 me
19. 2 The B S is not guaranteed if using recycle paper 3 Has the life span of the developer 3 Replace the developer when the life ended span of it has been ended 4 Is the movement Up and Down of 4 Clean the bushing part of the transfer the transfer roller smooth roller 5 Is the HVPS normal 5 If the problem is still not solved replace the developer Service Manual CI Samsung Electronics Troubleshooting 6 5 9 Ghost 1 e Description Ghost occurs at 75 5 mm intervals of the OPC drum in the whole printing j Digital Printer Digital Printer Digital Printer WICH 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 one 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 o
20. 31 0 KU 5 0 U VALUE 25 0 SEH 4 0 SEL 4 0 L_VALUE 9 0 HCLR 20 0 ADO_2 9 0 nLREADY nHSYNC ENGINE LSU_CLK LSU_VDO DAC_OUT ADC_EN SEL 1 0 ADC apcOn Controller Samsung Electronics Service Manual KO Circuit Description The main signals used in LSU Controller are shown in the table Name Direction Description PVC VDO The video data output from PVC nLREADY Its activity becomes low as the polygon motor of LSU gets the regular speed nHSYNC It informs the beginning of one line It is the same as nLSYNC of PVC nPSync 0 It is inputted to nFSync of PVC LSU_VDO 0 The completed video data output by masking video window on PVC_VOD Laser Diode amp Window On Off Time first field second field 7ft pi windowOn H H IdOn windowOnTime windowOffTime IdOnTime CC XX SEE SE SN IdOffTime TI CC A A saiem TL LLU UU UU UU UU UU UU UU UU UUU UUUUUUUL pattern start AAAAAAAAAAAAAAAAAAAAAAAAA AAA A counter start A A H PVC_DVO 11 1 5 ADC Controller ChoursM ADC Controller has 8 analog input channels It automatically converts the 8 channels in turns with 10 bit 500KSPS adc1341x pc and also it makes the conversion on the desired time by manually controlling STC of the register After finishing the conversion it makes the interrup tion to be pending When AD conversion of 3 rd channel ends for the PI Control of LSU it s
21. 38 6044 000159 ING C 2 gt 2 gt er ole Him DIDI NIDDM NIM DIDI NI NIN NNJN g gt gt 2 gt gt O o gt gt n n P gt gt n n n gt gt gt mn gt A mn mn BING RING RING ING HEN 6 1 7 Ss D _ o N gt _ 1 Co i Wad KEY 6 1 9 Parts List Service SA service available SNA service not available 6 1 10 6111 6 112 JC75 00095A 6 1 13 6 1 14 n n n min gt gt gt gt gt gt 6 1 15 6 116 6 1 17 6 118 PE 6 2 2 6 2 2 1 6 2 2 2 SHEET ADF HOLDER 6223 6 2 24 6 2 4 6 3 1 6 3 3 nin n gt gt ES ESIESIESIESLESIESIESIESIES D N mn gt n n n gt gt gt TNTNTNJN TN D N es mn gt SI o N GA 0p gt 0p gt SI o Ki Ra gt ala nlg gt gt gt lt SSS D D co Di IS N Wal n Wel Z mn gt N N o N N JC63 00659C COVER PLATEN JC63 00209A SHEET WHITE SPONGE N N N N N oO Wel gt JB72 01166D PMO TX STACKER JC61 00833C GUIDE DOC_R JC61 00834C GUIDE DOC_L n gt N N A N N al nm gt mn gt ICT SHAFT PINCH PMO ROLL PINCH T 7 13 8 J N y 02 gt mn gt N N 00 N N co m gt mn gt N N o NINN ON WM gt gt gt 8 JC96 04236A ELA HOU SCAN LOWER 8 1 1 JC63 00660B COVER SCAN LOWER mn gt 8 1 2 8 1 2 1 8 1 22 8 1 23 8 1 24 8 1 25 8 1 26 mn NID DN mn
22. Back injury could be caused if you do not lift carefully 4 Ensure the printer is installed safely The printer weighs 11 2Kg 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 i 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 personal safety reasons prior to applying power to the unit under test 2 After removing an electrical assembly
23. Only Memory EMI Electro Magnetic Interference EP electrophotographic EPP Enhanced Parallel Port FPOT First Printout Time FAN 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 1 0 Input and Output IC integrated circuit IDE Intelligent Drive electronics or Imbedded Drive Electronics 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 Isopropy 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 quantit
24. Roller 17 Paper Exit Type Face Down 18 Feed Roller Force TBD Kg f or more 19 Spring Feed Tensile Force TBD gf 20 Feed roller Velocity mm sec 21 Feed Roller Material 22 Exit Sensor Photo Sensor Wwe u m FH NH Ii m FI Zn Service Manual Samsung Electronics System Overview 3 3 Develope 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 Standard 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 220V 230 5 Capacity 750 Watt 30W Light Qty Distribution 140 Life 3000 Hr 2 Thermostat Thermostat Type Non Contact type THERMOSTAT Control Temperature 150 C 5 C 3 Thermistor Thermistor Type HF R0060 SEMITEC 364FL Type Temperature Resistance 7 k 2 180 C SYSTEM Temperature
25. 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 HAN 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 3 12 Service Manual Samsung Electronics System Overview 3 4 Sanner Part 600dpi Color CIS Module for Flat bed SCX 4725FN 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 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 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 Horizontal 11 8 Pels mm 300 x 300dpi b When Copy Vertial 11 8 Line m
26. Save Ignore Toner Default Darkness Default Original Type Default Reduce Enlarge Default Number Of Copy Timeout Receive Mode Ring To Answer Buto Reduction Discard Size RCV Start Code DRPD Mode Security Mode Prefix Dial Stamp RCV Name BOM Mode Speaker Ringer Key Sound Alarm Sound Notify Toner Pi rama re Rng ine Version Emulation Version Total Page Counts Toner Remaining Toner Page Counts Status Capacity Replaced Toner Counts Install Date Supplier Serial No Platen Scan Page Counts ADF Scan Page Counts IP Address Mewwry Slee 5 MAY 2004 00 02 WED Pax Number Name Item 01043244232 cys Status Plain Paper Bond Letter AM 12 Hour 24 Hour English FRANCAIS USA Germany 5 10 15 30 50 120 0ff On Off Light Normal Dark Text Text Photo Photo Original LGL gt LTR 1 99 15 30 60 120 180 0 Fax Tel 1 7 Light Normal Dark 1 15 0 13 On Off On Err On off On Off 0 30 MM 0 9 On off On off Fax Number On 0ff On off On Off Comm Off Low Med High On 0ff on off On Off Plain Paper aM 24 Hour English Germany 30 Min off Normal Text 100 1 30 Sec Fax 7 Normal 1 05 1 00 00 QPDL 1 41 11 30 2005 PCLS 3 55 09 05 2006 PCL5e 2 12 07 04 2006 PS3 3 25 08 14 2006 17 99 22 Toner Normal 3K 0 20060908 SAMSUNG Export 2 15 10 240 15 50 32 Mo
27. Sheet System Data Yes EI Service Manual Samsung Electronics Product Specifications 2 2 2 Print Specifications Method Laser Beam Printing Speed Up to 24ppm in A4 24ppm in Letter Emulation PCL Power Save Yes Interval option 5 10 15 30 45 minute Resolution Normal 1200 x 1200 dpi RET Memory 32MB First Print Out From Stand by Approx 10 seconds Time From Cold Status Less than 30 seconds Duplex Print Manual WHQL Compliant Window XP Printable Area A4 201 6x288 6mm LTR 207 6x270 6mm Legal 207 6x347 6mm Folio 207 6x322 6mm Halftone Gray Scale 256 levels 2 2 3 Scan Specifications Compatibility Twain standard WIA Standard Window 2000 XP Scan Method 600dpi Color CIS Contact Image Sensor Module PC Scan Speed Lineart Halftone 10sec Platen 13sec ADF through Platen Gray 23sec Platen 26sec ADF Color 300dpi 65sec Platen 70sec ADF Resolution Optical 600 x 600 dpi Enhanced 4800 x 4800 dpi Halftone 256 levels Scan Size Max Document Width Max 216mm 8 5 Effective Scan Length 297 mm 11 7 Effective Scan Width Letter Legal 208mm 8 2 A4 202mm Scan to Button Yes Application Yes Scan Depth Color 24 bit Mono 1bit for Line art Halftone 8 Bit for Gray scale Samsung Electronics Service Manual EI Product Specifications 2 2 4 Copy Specifications Co
28. 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 faulty sensor 1 Replace the defective actuator or sensor 2 SMPS PBA or Main PBA is defective 2 Replace the SMPS PBA or MAIN PBA as appropriate 3 Faulty cables or connectors 6 3 5 Paper Empty 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 faulty sensor 1 Replace the defective actuator 2 SMPS PBA or Main PBA is defective 2 Replace the SMPS PBA or MAIN PBA as appropriate Service Manual KI Samsung Electronics Troubleshooting 6 3 6 Cover Open 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
29. There is a universal cassette which automatically loads paper and the manual feed which supplies paper single sheet at atime The cassette has a friction pad which separates paper to ensure single sheet feeding and it has a sensor which checks when the paper tray is empty 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 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 Se
30. and the heat lamp radiates heat On the other contrary if the signal is turned off the PC1 becomes off and the TRIAC is turned off due to no elec tricity at the gate of the TRIAC Consequently the heat lamp is turned off Special Feature of TRIAC THY 1 16A 600V SWITCHING Phototriac Coupler PC3 Turn On If Current 15mA 50mA Design 16mA High Repeive Peak Off State Voltage Min 600V Service Manual 114 Samsung Electronics Circuit Description En av D7 MMSD914T1 px e gt nFUSER ON R14 R16 3 3V 15 4K 5 1K 3 3V 5 KDS226 el gt D5 SL A e u2 2 Xx KDS226 R37 LM393D DGND Y 7 5K 1 R13 R15 BEND pee 33K 14 7K noo CN3 1 1K FUSER THERM1 lt 4 4 4 3 3V m an c32 JL na LL 6339 5 d po nF 470K 5 10nF 1 8 ass L a2 c18 F 2 35301 0250 o Has GEN MMBT2222ALT1 10nF 10K de ys NFUSER_EN e 1 8 2oy 2 1 2 ca Se DEND D4 y 100pF MMBT2222ALT1 KDS225 4 DGND o m Explanation about the condition of Normal Operation If the fuser P3 7 port becomes high the Q6 is activated A heat lamp starts operating by the activity As the temperature of the heat lamp is increased the resistance value of the thermister is decreased Therefore the electric potential of the circled A becomes low On Off operation of the Q6 is only controlled by the fuser P3 7 port because 5 of the U11 Compara
31. function is Line connection Line state monitoring and TAD interface that enables a extension telephone or TAD machine to the SCX 4725FN machine 11 2 7 Engine Paper Feeding 1 Feeding Type MP Cassette Type 2 Feeding Standard Center Loading 3 Feeding Qty Cassette 150 sheets 759 mi 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 1 3 or more 10 Pick up Velocity 94 8731mm Sec Process 93 0667mm sec 11 Paper detecting Sensor Photo Sensor 12 Paper Size Sensor None 13 Paper Separating Pad Material NBB 52 y 0 8 1 2 14 Separating Pad Pressure TBD 150 gf 5 Pick_up Roller RPM 47 683 RPM 6 Feeding Pressure Same as Transfer Roller TBD 150 200gf SPRING H mm based on 1sheet TBD 150 200gf SPRING H mm based on 150sheets Paper Exit Type Face Down Feed Roller Force TBD Kg f or more Spring Feed Tensile Force TBD gf 4 4 17 18 19 20 Feed roller Velocity mm sec 21 Feed Roller Material 22 Exit Sensor Photo Sensor Service Manual KET Samsung Electronics Circuit Description 11 2 8 Deverope Process Developing Method Non magnetic 1 element contacting method Toner Non magnetic 1 element shatter type toner Toner Qty 35gf 60gf 1
32. 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 y 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 Bid 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 Bd 4 Check 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 y may be defective Replace the OPE Ass y 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 th
33. l IT 6 I L 9T PT TC NT 81 91 PI ZI 018 sel 9 7 Tempo am IND HS OST El YAMOd AT Il AS AS NST ON NA YOLON_OSTU ACVAY NSTU TSAPT Ss ANDA ATO LOW NSI j bt i YO j ON 97 NO aasnausz SNAS IDAAUPZ ANDA Ez AS TT ISA T OT ISAYZ ol _ ATSI SAVE LI JAG el 2G Add AMA HL NIVIN NVd el AVIA AHLII AHL WMAOI NA AHLU6 AS 8 1 ACEO GANDA S TSAFTY TSAFTE ISAPTT Mag En E NO YASNA ON 07618 SNAS IDAAU 8 ANDAL QANOTI AS NIVW NVI PI SVIEWMAEI AYIA AHL AH WAGI NA AMLO AHLWMd6 ANOT9 ACES l DN 3 ASL TSAYTY TSALTE ISA TT HOLIMS ONDIN 07 81 9I PI ZI OL 61 LI ST eI Il 6 D SdAH END ISAPTP ISAPT E 68L9SFETI ZNO Pa SAWS HOLIMS O4IIN LOH ZSAbz a SdINS NVA Tecate arenes AOTT AOTT OV WeIseIG UONUU0 ASZLP XOS NASTLP XIS Service Manual Samsung Electronics Reference Information 10 Reference Information This chapter describes the reference information for applying this training manual and it is consist ed of the tool list the abbreviation table the outline of model and so on 10 1 Troubleshooting Tool The following tools are recommended safe and easy troubleshooting as described in
34. 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 gg Troubleshooting 6 5 Bad image 6 5 1 Vertical Black Line and Band lt Describtion 1 Straight thin black vertical line occurs in the printing p 2 Dark 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 c Description White vertical voids in the image
35. proper Check if the connection is properly done and if the parallel port in CMOS is rightly set up 3 Check the parallel port related items in the CMOS 3 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 gt 4 Reboot the system to print lf 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 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 Do 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 fr
36. 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 LESPOSIZIONE AL FASCIO PRECAUCION RADIACION LASER IVISIBLE CUANDO SE ABRE EVITAR EXPONERSE AL RAYO ADVARSEL USYNLIG LASERSTRALNING VED ABNING NAR SIKKERHEDSBRYDERE
37. this service manual e DVM Digital Volt Meter Standard Indicates more than 3 digits EE Standard type type M3 long M3 short M2 long M2 short Tweezers _ Standard For general home use small type z Standard For general home use for medical service e Cleaning Equipments Standard An IPA Isopropyl Alcohol dry wipe tissue or a gentle neutral detergent and lint free cloth e Vacuum Cleaner e Spring Hook Standard For general use e Software Driver installation CD ROM Q Y W N Samsung Electronics Service Manual KI Reference Information 10 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
38. 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 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 6 32 Service Manual 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 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 correctly set up the correct port is selected and Use On line is selected in the driver
39. 009 0 dn dp DOpz X 009 dp 0072 X 009 jesydo uonnjosey dp 009 X 009 dp 009 X 009 Idp 00 X 009 dp 009 X 009 uonnjosey 27 wudd Z py wdd Oz 1y7 uddg py udd g 4yq wddoz yw uwdd oz ywddgz py wdd yz peeds AO Ajijenb idp 009 X 0021 Sd 919d Idp 0021 X 00Z1 0 dn Sd 919d Idp 009 X 00rZ Sd 919d dp OOZL X 0021 uonelnwg uonnjosey 27 Wudd Z py wdd Oz 4yq wudd6 py udd g 1 uddoz yw uwdd oz 1y1 uddgz py wdd yz peeds OLZS AW uoueo SSOE P1 dH N0282 DAW 134019 widdyz Z Asunym NISZZ7 XOS abew japon Service Manual EJ Samsung Electronics System Overview 3 System Overview 3 1 System Layout The SCX 4725FN 4725F 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 4 LBP Printer exclusive Controller is chorus M CPU ASIC and 1 Board Scanner part is composed of ADF and Platen and is connected with Main by Harness Scanner part ADF ROLLER PICK UP ROLLER COVER PPEN EXIT ROLER ADF UPRER FEED ROLLER LOWER ma Ss SCAN UPPER lar WHITE BAR ADF GLASS Engine Part Service Manual Samsung Electronics System Overview 3 1 1 Feeding section
40. 01 Motor Test Description The main motor starts when the execution key is pressed and stops when the stop key is pressed Display Main Motor On Off 02 Pick Up Test Automatically stops when the execution is chosen Tray 1 2 Solenoid On Off stops when the execution is chosen 03 Fan Test The fan starts when the execution key is pressed and Fan On Off stops when the stop key is pressed 11 LSU Motor The laser motor starts when the execution key is pressed Laser Motor On Off and stops when the stop key is pressed 12 LSU Error Test The LSU motor starts and Laser Ready is displayed if Laser Leady On Off the motor spins at the correct speed otherwise Laser Error is displayed 13 LD Test Diode On is displayed when the laser diode is on Diode On Off Otherwise Diode Off is displayed 21 Feed Sen Test These functions allow the current 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 displayed 31 Them ADC 170 Current value is displayed on the upper line of the LCD Target temperature and
41. 0Hz Ring detection Current 20mA 100mA condition Voltage 40Vrms Frequency 20Hz product Margin over 15mA 3 False Ring Sound Ring Frequency 750 Hz 1020 Hz Ring interrupt Cycle On Off depending on input Ring Signal Cycle 3 10 Service Manual Samsung Electronics System Overview 3 2 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 thatthe printing image can be made up on the OPC Drum 3 2 6 Engine Paper Feeding 1 Feeding Type MP Cassette Type 2 Feeding Standard Center Loading 3 Feeding Qty Cassette 150 sheets 759 mi 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 4 1 3 or more 10 Pick up Velocity 94 8731mm Sec Process 93 0667mm sec 11 Paper detecting Sensor Photo Sensor 12 Paper Size Sensor None 13 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
42. 12 Carefully release the Halogen Lamp in the direc tion of arrow Lamp Cover right Lamp Cover left 11 Release the CBF Harness from the Halogen Lamp and remove the two screws securing the Halogen Lamp as shown below CBF Harness Fuser CBF Harness Fuser GC 5 20 Service Manual Halogen Lamp 13 If necessary remove the four screws securing the Fuser Cover and remove it Pressure Roller Notice Be careful not to damage or contaminate the surface of the roller when assembling and disassembling the Heat Roller Samsung Electronics Disassembly and Reassembly 5 18 Engine Shield With LIU PBA SMPS 1 Before you remove the Engine Shield you should 4 Remove the six screws securing the Engine Shield remove and unplug the DC Fan connector from the Main Scan Ass y Refer to the 5 9 PBA Then carefully release the Engine Shield from Middle Cover Refer to the 5 13 the Actuator Feed Sensor Lever as shown below 2 Unplug the all Connectors from the SMPS and LIU ee Engine Shield PBA RINN WILIU PBA SMPS y W BA Es Actuator Feed Sensor Lever 5 When if only remove the SMPS first remove the Rear Cover refer to the 5 6 and unplug the two Connectors from the SMPS as shown below 3 Carefully release the CRUM Harness below the Then remove the six screws securing the SMPS bottom of the Engine Shield in t
43. 3 Remove the four screws securing the Main PBA SE as and remove it an_SMPS mm OPE m LSU USB I Main Motor Line _ JTAG Speaker o T d CA o Modem Clutch HVPS CRUM Main PBA 5 16 Service Manual Samsung Electronics Disassembly and Reassembly 5 16 RX Drive 1 Before you remove the RX Drive you should 3 For easy disassembly release the Feed Gear from remove the Frame Scan Ass y Refer to the 5 9 Middle Cover Refer to the 5 13 Main PBA Refer to the 5 15 2 Remove the two screws securing the Engine Shield and remove the five screws securing the Frame then remove the RX Drive in the direction of arrow as shown below a 7 RX Drive 4 If necessary remove the two screws securing the RX Motor and remove it Notice The five screws have numbers stamped into the RX Drive Ass y base plate When refitting the Rx Drive Ass y tighten the screws the order they are numbered Service Manual i Samsung Electronics Disassembly and Reassembly 5 17 Fuser Uni 4 Remove the Safty Cover using a flat blade screw 1 Before you remove the Fuser you should remove driver as shown below 5 Remove the two screws securing the Fuser Front as shown below Cover and remove it Fuser Front Cover Scan Ass y Refer to the 5 9
44. AD I F Yes Tone Pulse Tone Default Pulse Changing in Tech Mode Pause Yes Auto Redial Yes Last Number Redial Yes Distinctive Ring 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 Sound Control Ring Volume Yes Off Low MED HIGH Key Volume Yes On Off Alarm Volume Yes On Off Speaker Yes On Off Comm Samsung Electronics Service Manual ES Product Specifications 2 2 6 Fax Specifications Compatibility ITU T G3 Modem Speed 33 6Kbps TX Speed 3sec Compression MH MR MMR JBIG Color Fax Yes Tx Only ECM Yes Resolution Std 203x98dpi Fine 203x1 96dpi S Fine 300x300dpi Photo 203x196dpi Color 200x200dpi Auto Switching Yes Scan Speed Standard approx 3sec ADF approx 5sec Platen Fine approx 7sec ADF approx 8sec Platen S Fine approx 7sec ADF approx 8sec Platen Rx fax duplex print out No Multiple page scan speed 7 cpm Ltr Standard Resoution Res Memory Tx 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 Off Broadcasting 109 locations Max locations Cover page No Delayed fax Yes Memory RX Yes
45. CLK is created by count block at the PWM TIMER 11 1 3 Motor Driver A motor drive circuit is decided when selecting a driver IC Supplied by vendor ML1610 uses the motor driver IC of AN44060 However the sensing resistance Rs value and the Vreference resistance value are variable according to the motor drive current value Service Manual 11 3 Samsung Electronics Circuit Description 11 1 4 LSU Controller The laser scanning unit controller LSUC of Jupiter4E is a block for interface between PVC block and LSU LSUC sends the video data received from PVC and the laser diode turn On Off signal created by inner 21 bit counter to the laser diode of LSU LSU creates the horizontal sync signal nHSYNC by sensing the inputted diode turn on off signal with the attached sensor nHSYNC is inputted to PVC and LSUC as a signal that informs the beginning of one line Also LSU makes the activity of nLREADY signal ready to print low when the polygon motor becomes regular ly rotating LSU can recognize the regular rotation status of the polygon motor by reading nLREADYFlag bit in SFR Once the polygon motor regularly rotates it sends the page sync signal nPSync to PVC by writing 1 at LSUCON 5 in LSUC and PVC starts operating for one page printing After that every time nHSYNC signal is created PVC sens es the signal and outputs the video data PVC_VDO to LSUC At this time LSUC creates the video window Printing area and masks it
46. Cause Solution 1 Check if there is a NOISE line by 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 Check 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 Bd in sequence Samsung Electronics Service Manual CI Troubleshooting 6 6 8 Defective FAX RECEIVE 4 e Description Received data is reduced by more than 50 in the printing 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 machin
47. Doc Position Paper e LEVER SENSOR SCAN Scan Lower Torsion Spring Service Manual 3 14 Samsung Electronics System 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 Key Matrix Part LED Driving Part and LCD Part 2 Key Description No Part Feature Function 1 Common 3 4Key Dialing and Option Input Start Starting Fax Copy Job Stop Clear Cancel Current Job Return to default Menu Option select Upper Level Return to upper level menu Enter Option select Execute gt Next menu or Next option item 4 Previous menu or Previous option item 2 Save Toner Save TONER SAVE MODE select 3 Copy Reduce Enlarge Select ZOOM ratio when copy No of Copies Select the number of copies Original Type Change Copy Modes Text Text Photo Photo Darkness Change the Darkness of the Copied image Light Normal Dark Favorite Copy Select one of the predefined Copy templates 4 Fax Resolution STANDARD gt FINE gt SUPER FINE gt PHOTO gt COLOR Phone Book Search the user defined Phone number Broadcasting When sending FAX data to many place in the same time On Hook Dial On Hook Dial Redial Pause Last number Redial Pause 5 Scan Scan to select scan to PC scan to FAX scan to E mail function 3 LCD Part Number of Characters 16 Character
48. ER UDE AF FUNKTION UNDGA UDSAETTELSE FOR STRALNING ADVARSEL USYNLIG LASERSTRALNING NAR DEKSEL APNES STIRR IKKE INN STRALEN UNNGA EKSPONERING FOR STRALEN VARNING OSYNLIG LASERSTRALNING NAR DENNA DEL AR OPPNAD OCH SPARREN AR URKOPPLAD BETRAKTA EJ STRALEN STRALEN AR FARLIG VARO AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALTTIINA N KYM TT M LLE LASER S TEILYLLE L KATSO S TEESEEN FEIS Hate 0 3748 AH alo Majo Sel your FISH O Service Manual E Samsung Electronics Precautions 1 2 Caution for safety 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 H 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 cause a fire or electric shock 2 Use only the power cable supplied with the printer Use of a
49. 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 Max 72hours EI Service Manual Samsung Electronics Product Specifications 2 2 7 Paper Handling Specifications Input Capacity and Types 250 sheet Cassette Tray 75 g m 20 lbs Output Capacity and Types 100 sheet Face Down 75 g m 20 lbs Manual Tray 1 sheet Media size A4 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 Cassette Tray 16 43lb 60 to 1659 m for 1 sheet Manual Tray ADF Capacity Up to 30 sheets of 201b 759 m paper ADF Document Size Up to Legal 2 2 8 Software Compatibility DOS No Win 3 x No Win 95 No Win 98 ME Yes Win NT 4 0 No Win 2000 Yes Win XP Yes Mac Yes 10 3 Linux Yes Driver Printer PCL TWAIN Yes WIA Yes ScanToPC Yes PC FAX Yes Send only Application RCP Yes Status monitor Yes SmarThru4 Yes Samsung Electronics Service Manual Product Specifications 2 2 9 Accessory Items SCX 4725FN SCX 4725F Quick Setup Guide Yes include Setup Guide and Function Guide Quick User Gu
50. 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 instead Samsung Electronics Troubleshooting 6 10 2 The printer is not working 2 After receiving the print command there is no response at all or print speed is low Description d A Aare P due to wrong setup of the environment rather than malfunction of the printer itself Check and Cause Solution 1 Ensure you have sufficient free hard disk space for the 1 Not working with the message insufficient printer temporary work files created during printing memory
51. LDER IDLEROLLER 2 SA mn gt 13 1 mn gt N wo N mn gt N oe wo mn gt SI Ee A 0p gt mn gt N Wu al N Wu O 0p gt n n NJN NJN P gt gt gt gt gt D gt JNJN NIN DW P gt gt S gt gt gt D gt ISIS SSS SS SSS SSS NTN a ER GA W N Wel Wel Wel gt lo N Parts List Service SA service available SNA service not available 13 252 13 253 14 0 14 4 14 2 14 4 14 5 14 6 14 7 14 8 STOPPER PICK_UP L 714 9 JC86 01258A_ CAM PICK_UP N 2 SA Replacement JC69 01026A BOX MAIN ____________________ TI Sa Replacement JF39 50094B__ CBFLINECORD ___________________ _ 1 SA 14 3 JC61 01717A HOUSING PICK UP B jN Block diagram 8 Block Diagram 43A1YO HOLOW INVIAS HO LOW WS E seinpow nivn ans TS de de dr db AS HOSN3S LIX3 ET 9182 68v 04U09 32 en Y3AIYQ ns SAS NVI fe HOLOW YO90PFNY NIV GES 173 OLOW NYOS aa YOLOW NYOS HUN eoe dey 1gwo sng dr AlUO NJS2 17 XOS 33v sto Lreswos 19A150SUBI julay33 dans O seo ba SERIES 028 ie HOLIMS G EEN GC 938 200 _ En E6702XO 01298X0 Alam3 00g NIYN NV4 VVG LEVAS 9EEXIS Ja OJUOD duibu3 HOSN3S 91 v32 x W91 ALINI d de NVIOS WOR vaz X 8N8 HSW13 YON Sd AH 1026 Nyv ISAVE H INIZ HH O dg YOLSINYSHL Ave M S H3MOd HISNI YMd OY SEA
52. N SdWS Ave NG d Age AEL AIUO NIGZ17 XOS XL 00 0 jeuley13 0 asn 93 11041NO9 NIV Nogg AOL OW WVYDVIO 1490719 M H 39ZZV NIGZ17 XOS 8 1 System Block Diagram 09087 1H zZ 310 A SeS 0193130 SWOH SID H3AIHQ HOSN3S A HOSN3S Bin 0333 a aaa NYOS A3Y J8119AUO SC WE Tuonesuso lt a 0 a Ka Y3IAIHO 037 007 Service Manual Samsung Electronics Connection Diagram 9 Connection Diagram YOLOW az nor i vzLno t NIVIN i ALLNOT j VILAO T YOLOW Lt es e HILATO dnd iaa AOLSINAAHL any AOLON ve HAY awz PA AAV ino ywi XT ano ee gk Soda dave _ GNDA ei Saad dave r _ NDA Lad d dqvu TI ANDA Il VN_LOW_AdV V LOW ACV 6 dHd LOW Javy 9 AS HA LOW _AUV 8 VHd LOW Adv AN LOW JAV Ss NDA a 6IND TINI MP T01 89FT A SE 6LSEI z EIND IND I AYALLVA i AS l occ MOSNAS AWOH LAG AWOH T ANDA TI KING QATA 6 AZI 8 IDOL Id YANNVOIS 9 ANDA E BEES AWOH YANNVOSU AXI TANYA S TANVd LSYWP ON TINVd E AST UNDAT A T6LS EI PINO eg ZI O18 9 HZ Capt Fl ano E ning DS OTNO Uli AST J9 0JUO UN 9IND IIND asn PIL ET ZITITOILGSLISPETI ST IZ 61 LI ST
53. Replace the defective actuator actuator 6 2 2 JAM 0 e Description 1 Paper is not exited from the cassette 2 Jam 0 occurs if the paper feeds into the printer Check and Cause Solution 1 Check the Solenoid by 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 Isopropyl 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 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 Solution Check and Cause 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 1 Replace the SMPS 2 Reassemble the Actuator Feed and Spring Actuator if the returning is bad Feed Feed Actuator may be defective 6 2 4 JAM 2 e Description 1 Recording paper is jammed in front of or inside the fuser 2 Recording
54. VER M_MIDDLE COVER M SIDE R COVER M_JAM EXTEND SMALL EXTEND LARGE COVER M_REAR V TRAY CASSETTE N BKT SPEKER na COVER M DEVE COVER M SIDE L Scan part figure 34 Service Manual Samsung Electronics System Overview 3 2 Engine H W Specification 1 Recording Method LSU Laser Scanning Unit 2 Printing Speed 24ppm In continuing printing base Letter printing pages from 2nd to last during 1min 3 Recording Density 1200 dpi 4 Cassette Capa Cassette 250sheets 759 n 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 Standard Pattern Printing 9 First Print Out Time within 11sec Standby 10 Warming up time within 35sec Ambient 25 C 3 2 1 Main Board Control Part Main control part of SCX 4725FN 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
55. 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 Chorus M is the main CPU and is made up on the 32bit RISC architecture using ARM 920T core Main CPU controls the whole system according to the program code which stored in the Flash ROM memory Operation Frequency CPU Core gt over 300MHz System Bus gt 100MHz Summary of the Key Function Block 1 3V for internal Core 3 3V for I O Pad with 16KB I Cache and 16KB D Cache Image Processor included On Chip clock generator with PLL Memory and External Bank Control DMA Control 16 Channel Interrupt Control 2 port USB Host 1 port USB device ver 1 1 interface control Parallel interface control UART 1 Channel Service Manual Samsung Electronics System Overview Synchronous Serial Interface Control A D Converter 10 bit 8channel General I O Port control 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 Capcity 16 Mbyte NOR Type Access Time 70 nsec SDRAM SDRAM is used for Print Buffer Scan buffer when scanning ECM Buffer when FAX Receivin
56. age 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 If 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 Using the keys print the Test Pattern gt Expected life of various consumable parts compare this with the figures printed and replace as required CI Service Manual Samsung Electronics Troubleshooting 6 1 2 Initial Inspection 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
57. al 7 13 Samsung Electronics Exploded Views amp Parts List 7 13 Paper Path Ass y 7 14 Service Manual Samsung Electronics Exploded Views amp Parts List 7 14 Pick UP Unit Parts List Service Parts List Model SCX 4725FN XAZ Service SA service available SNA service not available MET A IC In SCX 4725FN XAZ SET 7 11 JC96 04230A ELAHOU FRAMELOWER__________ 1 sa 7 12 JC96 04065A ELA UNIT LSU LL SA 7 13 JC39 00642A HARNESS LSU LI sa 7 14 JL JC96 03352W ELAUNIT DEVE INITIAL LI SNA 7 1 5 JC96 04229a ELAHOU FUSER_ sa SN SNA 1 1 BING RING RING ING HEN SIS alaxala sla mn gt 8 9 gt P 1 10 111 1 12 1 13 1 14 1 15 1 16 1 16 1 16 2 gt P gt gt P gt gt gt 1 18 1 19 1 20 1 21 1 23 1 24 1 25 1 26 gt gt Z gt gt 1 27 1 28 1 29 2 2 22 2 2 2 2 2 3 GB70 105004 IPR UNIT FIXING BRAC 224 Z gt 1 26 1 JC67 00087A CAP M HINGE PIT ATSTSTNTATATATATATATATATATATATATATATATATATATN N O E gt gt 2 gt gt NINININI NTN N N co N gt gt N N gt gt 254 2 5 3 3 gt T T T w N N O a a N gt J Wu _ n n no 02 Wad Wad Wad Wad Wad 02 Wad Wad 7 DN 5 N 5 D D N 5 D DO nin gt N wn SIR SOOEIROROROROPROEIROROROEIROEO gt gt gt gt gt gt gt gt
58. amp Parts List 7 4 Rear Cover X GUIS 5 A DSI d Service Manual Samsung Electronics Exploded Views amp Parts List 5 Frame Ass Service Manual Samsung Electronics Exploded Views amp Parts List 7 6 ADF Ass abed xau 0 aas NA IV1d HIAOO VAN 7 7 Service Manual Samsung Electronics Exploded Views amp Parts List 7 7 Platen Cover Ass 7 8 Service Manual Samsung Electronics Exploded Views amp Parts List 7 8 Platen Ass eed Gau 0 ass 3d0 NOH VI 7 9 Service Manual Samsung Electronics Exploded Views amp Parts List 7 9 OPE Unit 7 10 Service Manual Samsung Electronics Exploded Views amp Parts List 7 10 RX Drive Unit Service Manual 7 11 Samsung Electronics 2 l Y 2 o o PA KO gt o o K Q gt lt l 7 11 MP Tra Samsung Electronics Service Manual Exploded Views amp Parts List 7 12 Fuser Unit Service Manu
59. and Type After loading paper in the tray you need to set the paper size and type using the control panel buttons These settings will apply to copy and fax modes For PC printing you need to select the paper size and type in the application program you use on your PC 1 Press Menu The display shows Paper Setting on the top line of the display 2 Press the scroll button d or to display Paper Size on the bottom line and press Enter to access the menu item Use the scroll button 4 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 4 or jp to find the paper type you are using and press Enter to save it D OF PB a To return to Standby mode press Stop Clear 4 2 3 6 Setting Sounds 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 b
60. anel ee 2 2 2 2 ee nn 4 13 4 4 LCD Status Error Massages d4 15 4 5 Engine Test Mode nenn 17 4 6 Paper Path and Clearing Pagan Jams 419 5 6 Disassembly and Reassembly 5 1 General Precautions on Disassembly 5 2 MP Tray 5 3 Pick Up Roller 5 54 Front Cover 0 sses an 5 5 Cassette Tray 5 6 Rear Cover en mn 5 7 Right Cover 2 te ee ee ee 5 8 Left Cover 5 9 Scan Ass y 5 10 ADF Housing 5 5 11 OPE Unit NN 8 2 8 2 8 2 8 we 255 5 12 Platen Housing 5 13 Middle Cover 5 14 HVPS 515 MainPBA ee ee B 5 16 RX Drive B 5 17 Fuser Unit 5 18 Engine Shield With LIU PBA SMPS ee e Dr 5 19 LSU 5 20 Paper Path Frame ee Dr 5 21 CRUM Harness Troubleshooting 6 1 Checking Symptoms 6 2 Bad discharge e em a ue DA E ae ag RS 6 3 Set Malfunction Causes and Solutions 6 4 Bad Software Environment 6 6 5 Bad image 6 6 Fax amp Phone Problems 6 7 Copy Problems 0 Er 6 8 Scanning Problems Causes and Solutions 6 9 Toner Cartridge Service 6 10 Software Problems Causes and Solutions 6 11 Windows Problems 6 12 SyncThru Installation Problems Exploded Views amp Parts List SCT MAN ma maan RE EI e a a a Die Ad 7 2 Co
61. ans Take great care to ensure that you do not catch your fingers hair or clothing in any of these rotating devices 3 Do not place any small metal objects containers of water chemicals or other liquids close to the printer which if spilled could get into tne 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 Assembly Disassembly Precautions Replace parts carefully always use Samsung parts Take care to note the exact location of parts and also cable routing before dismantling any part of the machine Ensure all parts and cables are replaced correctly 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 removing or re fitting any parts do not use excessive force especially when fitting screws into pla
62. ar 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 manufacturing 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 u nz 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 D 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 If SYSTEM DATA This list provides a list ofthe 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 System Data List Options Paper Type Paper Size Clock Mode Language Select Country Power
63. at 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 Troubleshooting 6 6 3 Defective FAX FORWARD RECEIVE e 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 Bd 2 If testing the MODEM shows a fault replace the Main B d e 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 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 624 Service Manual Samsung Electronics Troubleshooting 6 6 5 Defective FAX RECEIVE 1 e Description FORWARD is functioning but RECEIVE is not functioning or the received data is corrupt d Check and
64. at vero eros accumsan et iusto odio dignissim qui bla praesent ov Singabet T Stephen J Singel D SE I Demperta Aminerimum S Labanda Sinpat Abarress a SSJS dwg OFINAL d MANLSYOdJONWTAFIH943098V68 MANLSUO x KLMNOPQRSTUVW HIJKLMNOPARSTUVWXYZ01 03456789ABCDEFGHIJ ABCDEFG Samsung Electronics Service Manual KE Circuit Description 11 Circuit Description 11 1 Engine Controller The engine controller module consists of a motor controller a PWM controller a LSU I F controller and an ADC I F controller 11 1 1 Heater Control ENGINE CONTROL PART AC CONTROL PART R22 180 Vcc FUSIBLE THERM Rs THERMISTOR 424Vs The heat lamp radiates heat by using AC power The AC power is a TRIAC a semiconductor switch device which controls a switch The ON OFF control is completed by turning on off a gate of the TRIAC through a photo TRIAC which is insulation part If explaining more detail about the AC control part it consists of passive circuit therefore it turns on off the heater by receiving the signal from the engine control part If the heater on signal is turned on at the engine electricity flows in as the LED of the PC1 Photo TRIAC is connected Then it emits light By this light the TRIAC unit a light receiving unit becomes on and electricity is supplied to the gate of the TRIAC Then the TRIAC is turned on As a result AC current flows in a heat lamp
65. awer Lank Benhibe SDF Mr Maderia D O el m m O Sg Ce A A zZ Z O q O D Re E lt 3 x lt N o N wo gt a O N 8 2 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 el m 71 Q I c A E E O O O D Rei 4 lt x lt N o N Ca gt a o N CO gt D O O m H 04300868 99v8ZL0ZAXMANLSHOJONNDIMIHO 43098 praesent lutatum ril lobortis nis ut aliquip exea commodo consequat Duis autem vel eum ireurgE dolor in hendreritin vulputate velit esse molestie tincidunt ut laoreet dolore magna aliquam erat A volutpat Ut wisi enim ad minim viniam quis nostrud exerci tation ullam corpersus cipit lotis nisl ut aliquip ex ea commodo consequat Lorem ipsum dolor sit Amet consectetuer adipiscing elit sud diam nonummy nibh veniam 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 plera facer posim aum Lorem ipsm dolor sit amet consectuer Duis autem eum iriure dolor in hendreritin vulputate velit cesse ea commodo mol Stnecrep Balrecneps ZLOZAXMAN LSHOdON Nam liber tempor cum soluta nobis eleifend option cogue nihil consequat 8 c D E velillum Dolore eu zril feugiat nulla facilisis
66. ble 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 e 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 Abnormal 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 n
67. cations Major Features Copier Print Scan Fax SCX 4725FN Net Dimension WxDxH 438 W 374 D 368 H 17 2x14 7x14 5 Net Weight Inc Toner Cartridge 11 2kg CPU Chorus M 300MHz LCD 2 Line x 16 characters 2Line x 8 characters for china and korea Toner Save Yes With toner save button VO Interface USB2 0 Network Interface Yes 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 5 5A 220 240 VAC 50 60 Hz 3A Power Consumption Sleep Mode Under 12W Standby Mode 70W Average 400W Print Mode Energy Star Compliant Yes Power Switch Yes Noise Warm up 49 ABA Stand by 35 dBA Coping 55 ABA Printing 53dBA Warm up time from Power On Status Less than 30 seconds from Sleep Mode Less than 30 seconds Recovery time Max Monthly Print 10 000 pages Volume Scan ADF 2 500 pages PLATEN 1 700 pages Average Monthly Print Volume 700 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 10 32 C 50 F 89 F conditions Humidity 20 80 RH Approval Class B Device Memory 32MB Page Counter Yes Print Configuration
68. cessary 2 Replace the OP panel 3 Replace the main PBA 6 3 10 Printed Vertical Lines become curved 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 CO 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 printer cable is directly connected to periph eral devices 1 2 w 4 Check the power of the printer and perform the Self Test H 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
69. cts 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 e 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 A gap 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 Check and Cause Solution 1 Check the Cable USB or Parallel is properly connected and that the printer can print correctly 2 Check that the driver is installed properly 3 Check that the copy function operates normally 1 Reconnect the PC and printer replace any faulty cables If using a parallel cable check that the par allel port is properly configured in the BIOS 2 If printing is OK check that the Scan driver is also installed Refer to User s Manual 3 If the copy function works replace the Main PBA If the copy function doesn t work replace the CIS Ass y and try again 6 8 2 Poor Quality of PC Scanned images E Descrip
70. current fax job Broadcasting Allows you to send a fax to multiple destinations Allows you to store frequently dialed fax numbers as one or two digit speed dial or group dial numbers for automatic dialing and edit the stored numbers Also allows you to print a Phonebook list Phone Book kano 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 i print a document S c A N S A Y E 4 14 Service Manual Samsung Electronics Alignment and Adjustments 4 4 LCD Status Error Messages STATUS LCD Display 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
71. d Check and Cause Solution Digital Printer Digital Printer _ _ Foreign matter stuck onto the window of Foreign matter stuck onto the window m 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 ao lt may occur when Burr and foreign sub stances are on the window of the devel oper frame 4 If the fuser is defective voids occur peri odically at the top of a black image 3 No 3 Remove the foreign matter and burr of the exposure window Developer cartridge 4 No 4 Open the front cover and check ribs that corresponds to the position of the voids Remove if found 5 If the problems are not solved replace the developer cartridge 6 16 Service Manual Samsung Electronics Troubleshooting 6 5 3 Horizontal Black Band They may not occur periodically Description 1 Dark or blurry horizontal stripes occur in the printing periodically j Digital Pri Digital Printer Digital Printer Diaital Pri Check and Cause Sol
72. ddle Cover Refer to the 5 13 From the Main PBA HVPS Refer to the 5 14 Hausing and remove it and SMPS as shown below 2 Remove the two screws securing the CRUM 3 Unplug the three connectors from the Main PBA Service Manual EI Samsung Electronics Troubleshooting 6 Troubleshooting 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 3 gt Refer to Solution of Image Problem Only Laser Printer MFP Not Support Service Manual EI Samsung Electronics Troubleshooting 6 1 1 Basic Check List 1 Check the Power 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 fan 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 mess
73. digit you want to correct and enter a new number For the SCX 4725 you can use Enter or Upper Level to move the cursor 4 Tosel ect AM or PM for 12 hour format press the or button or any number button For the SCX 4725 press Enter and then the scroll button 4 or kl When the cursor is not under the AM or PM indicator pressing the x or button immediately moves the cursor to the indicator For the SCX 4725 press the scroll button 4 or pp 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 4 or 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 4 or 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
74. 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 ifthe printer is properly working alone ga Service Manual Samsung Electronics Troubleshooting 6 4 2 The printer is not working 2 After receiving the printing order no response at all or the low speed of printing e Description F A AO 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 2 Printing error occurs even if there is enough space in 2 The connection of the cable and printer port is not the hard disk
75. e 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 6 26 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 1 Room light can pass through a thin original 2 Check shading profile 2 Redo shading profile in the tech mode 3 Check white black reference voltage on Main PBA 3 Replace the Main PBA 6 7 2 Black Copy Description Black page is printed out when Copying Check and Cause Solution 1 Check for CIS problem on the Main PBA 1 Check the CIS FFC Cable is properly connected 2 Check shading profile 2 Redo shading profile in the tech mode Service Manual Samsung Electronics Troubleshooting 6 7 3 Abnormal noise e 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 obje
76. e 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 2001 Load Out Voltage Trigger 6 5 yA 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 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 50V 5042 Load Out Voltage Rising Time 50 ms Max Out VoltageFalling Time 50msMax Out Voltage Range 30 WQ 100012 Output Control Signal MHV PWM Active Low PWM signal for controlling MHV Service Manual Samsung Electronics System Overview c Developing Voltage DEV Input Voltage 24V DC 15 10 21 6V 27 6V Output Voltage 350V 20V 50 Moload Output Voltage Fluctuation range PWM Control Input contrast of the output stability degree 5 o
77. e exit Samsung Electronics Service Manual KI Troubleshooting 6 2 5 Multi Feeding e Description Multiple sheets of paper are fed at once Check and Cause Solution 1 Solenoid malfunction the solenoid does not work 1 Replace the solenoid if necessary properly Perform Engine Test Mode Pick up Test 2 Pad Friction is contaminated with foreign matter oil 2 Clean the pad friction with soft clothe dampened with IPA Isopropyl Alcohol 3 The face of paper is blended 3 Use the smooth paper 6 2 6 Paper rolled in the Fuser 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 1 After disassembling the fuser clean contami roller Background Hot off set nation between the heat roller and the ther mostor and remove the contamination of the pressure roller 2 Check the claw of the fuser whether it is unfit 2 If there is heavy background repair it by the ted 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 KI 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 i Check and Cause Solution 1 Paper is too much thin 1 Rec
78. e the machine still performs all normal operations To enter the Tech mode SCX 4725FN To enter the Tech mode press gt SO 4 in sequence and the LCD briefly displays TECH the machine has entered service tech mode To enter the Tech mode SCX 4725F To enter the Tech mode press 4 in sequence and the LCD briefly displays TECH the machine has entered service tech mode Service Manual 4 4 Samsung Electronics Alignment and Adjustments 4 2 2 Setting up System in Tech Mode 1st level 2nd level 3rd level Default Value RETURN KE RETURN left right amp amp Enter p 14 character left right amp amp Enter Tech Mode Data Setup Send Level 09 15 Data Setup gt Modem Speed 33 6 28 8 14 4 12 0 9 6 4 8 Error Rate 5 10 Notify Toner Customer No Customer Name Service No Serial No Clear All Mem Select Country Clear Count Enter Password xx xx Flash Upgrade Local Silence Time Off 12 Sec Unlimited Ignore Toner On Off Test Param Set 00 50 Machine Test Switch Test Modem Test Dram Test Rom Test Pattern Test Shading Test Protocol System Data Error Info Service Manual KI Samsung Electronics Alignment and Adjustments 4 2 3 Setting 4 2 3 1 Changing the Display Language To change the language that displays on the control panel follow these step
79. eftt side in the direction of arrow as shown below Left Cover Left Cover _ Sponge Speaker Fixing Bracket Service Manual Samsung Electronics Disassembly and Reassembly 5 9 Scan Ass y 1 Before you remove the Scan Ass y you should 4 Release the Scan Ass y 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 from the Main PBA as shown below 3 Unplug the three Connectors ADF Scan Motor OPE and Film Cable CIS as shown below EI 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 y remove and remove it At that time carefully release the Scan Ass y Refer to the 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 ti
80. ends the 10bit digital data converted with the latch short pulse signal to LSUC KOI Service Manual Samsung Electronics Circuit Description 11 2 System Overview SCX 4725FN is made 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 Chorus M ASIC which is made for only printer is used in the Main Control part and another Micom which can communicate with Chorus M through UART for Key Scan LCD display LED control etc is used for OPE Panel part PC interface control part USB 2 0 Chorus M Controller ASIC and Image processor is comprised in the Chorus M Modem chip SFX336 which make a function of FACSIMLE 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 volt age to the printing image developting process 11 2 1 Engine H W Specification 1 Recording Method LSU Laser Scanning Unit 2 Printing Speed 24ppm In continuing printing base Letter printing pages from 2nd to last during 1min 3 Recording Density 1200 dpi 4 Cassette Capa Cassette 250sheets 759 ni Base 1 sheet Feeding N A DRIVE Selection Paper OHP Envelop 1 sheet 5 Manual Tray A
81. 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 floor can generate static electricity sufficient to damage an ESD 1 4 Super Capacitor or Lithium Battery Precaut
82. esumes 2 Remove the jammed paper by genily pulling it straight out 4 22 Service Manual Samsung Electronics Alignment and Adjustments 4 6 3 3 Inthe Paper Exit Area 1 Open and close the front door The jammed paper 4 Remove the jammed paper by gently pulling it automatically exits the machine straight out If the paper does not exit continue to step 2 2 Gently pull the paper out of the output tray 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 m i 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 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 e Follow the procedure
83. f Tone Gray Scale 256 Levels 1112 Service Manual Samsung Electronics Circuit Description 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 AME 24VDC X AH 0 6A Peak 7 Motor Driver speed amp method a FAX Transmission Normal Mode 2000 pps 2 2 Fine Mode 1000 pps 2 2 Super Fine Mode 667 pps 2 2 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 30mA 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 Samsung Electronics Service Manual 11 13 Circuit Description 10 Document Scan sensor a Type Photo interrupt b Position ADF PBA c LED Max current 50mA Max Voltage 3 3V d Output Logic H Off No Position No Paper Logic L On Doc Position Paper
84. g and system working memory Capacity 32 Mbyte Access Time 166MHz Max Data Backup 48 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 600 600 dpi Scan Width 208mm Function White Shading Correction Gamma Correction CIS Interface 256 Gray Scale 3 CIS Driving Part 3 6 Service Manual Samsung Electronics System Overview CIS Supply Voltage 3 3V CIS Max frequency 5MHz ClSLineti
85. he direction of and remove it arrow Service Manual EJ Samsung Electronics Disassembly and Reassembly 6 When if only remove the LIU PBA first remove the Rear Cover refer to the 5 6 and then unplug the connector from the LIU PBA as shown below Then remove the two screws securing the LIU PBA and remove it 5 19 LSU 1 Before you remove the LSU you should remove Scan Ass y 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 Service Manual 5 22 a Samsung Electronics Disassembly and Reassembly 5 20 Paper Path Frame 1 Before you remove the Paper Path Frame you should remove Scan Ass y 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 as shown below 3 To remove the Transfer Roller first unlatch the lock device of the Holder TR from the Frame and then pull the Transfer Roller with Holder TR in the direction of arrow as shown below Transfer Roller Notice Do not grab the rubber part of the Transfer Roller it may cause a malfunction due to a foreigen object Holde the both side of the Transfer Roller when replac
86. he 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 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 416 Service Manual Memory Dial Full During Auto dial transmission when all 15 jobs are configured and try to add 16th job Samsung Electronics 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 4725FN Press a 3 in sequence and the LCD briefly displays Engine Test the machine has entered Engine Test Mode Press O 1 2 3 or 4 to select the Test No see list below left hand column 4 5 2 Diagnostic
87. here is PWROUT to adjust output impedance of Clock Out Driver is inside SSD and CLKSHIGH Resistor to adjust duty of HLPWR Resistor and Clock Clock from SSD to LSD has Differential structure of 180 phase difference for Noise Robustness DIB Data transfer Data from SSD to LSD by Transformer and also transfer specific data from LSD to SSD After transferring data from SSD RSP is transferred and LSD recognizes RSP and change LSD to output Driver transfer Data to SSD DIB Data form SSD to LSD by Transformer has Differential structure of 180 phase difference between DIBP and DIBN for Noise Robustness Service Manual Samsung Electronics System Overview 3 2 4 Line Interface Part This is Connection Part between system and PSTN Public Switched Telephone Network and primary circuit is usually located Main functions are Line Interface Telephone Connection and Line Condition Monitoring 1 Telephone Line Connection Modular Plug RJ 11C LIU PBA Modular Type 623 PCB4 4 3 Line Code Length 2500 50mm a Line Code Color Black ON HOOK state Characteristic 1 DC Resistance DP Dial Mode Direct Current 30mA 50 3000hm 2 DTMF Dial Mode Direct Current 20mA 50 5400hm 2 Ring Sensitivity Ring detection Voltage 40Vrms 150Vrms condition Current 25mA Frequency 15Hz product Margin 30Vrms 150Vrms Ring detection Frequency 15 3Hz 68Hz condition Voltage 45Vrms Current 25mA product Margin 15Hz 7
88. ide Yes Korea Only S W CD ROM 3 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 Item SCX 4725FN SCX 4725F Type Single Cartridge How to install Front door open and front loading Toner Yield 3 000 pages at ISO 19752 Std Coverage Ships with 1 000 pages Starter Toner Cartridge Code SCX 4525D3 Level Sensor EI Service Manual Samsung Electronics Product Specifications 2 3 Model Comparison Table ebpuyes a buis ebpuyey ajbuis MZ Mg JeneIs MeL WNIG Dec JeuoL oBpuueo esesald z yS 4eueIS ME abpuyes ejBuis adh XL 2589 001 01 Jojo 0Z asn XL 2589 001 01 Jojo oz asn XL 9589 001 01 jojo y8cl 3331 11 ASN XL seg 001 01 joo 0Z asn 29 19 u jeJsusg WUuIzZyy X 117 X 987 ww CG X 907 X 167 ww 767 X GEE X zey GGL WUBI X PLE X BEL UOISUBLUIG JON S BaYS 0G Kei LSO J99ys OGZ O0L papo ZL peeds sjesys NG Kei d 189ys OSZ suoNe90 6L sjsays GE Kei LSO Jays 092 suone00 802 sjaaus OF KEJIL AN 89YS 092 061 paads 01 yono Aoede JOY Ayoedey mdut ed ony sabed ggz Xolddy se ed 011 01 dN IN Z sabed 009 Xoiddy sabed oze xouddy Alowsy sdqy gee sdqy OC sdqy oC sdqy 9 ee peeds wapoyy Idp 002 X 0021 dp
89. ine 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 READY state TONER LOW Toner Low When the machine has encountered the Toner Low TONER EMPTY Toner Empty Replace Toner When the machine has encountered the Toner Empty Samsung Electronics Service Manual gg Alignment and Adjustments 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 t
90. ing it 4 Unlatch the lock device of the Pick Up Gear and remove it 5 To remove the Pick Up Unit first lift the notch attached to the left side Pick Up Cam so that it s slide the left to right from the Pick Up Shaft and then slide the Pick Up Unit right side to left side and take out the right side as shown below Samsung Electronics Service Manual EI Disassembly and Reassembly 6 To remove the Feed Roller first unlatch the lock device of the Feed Gear and remove it Then pull the Feed Roller from the Bush and take out the Feed Roller with Feed Shaft from the Frame in the direction of arrow as shown below 7 Remove the screw securing the MP Solenoid and remove it as shown below Feed Shaft a if SS 5 24 Service Manual Samsung Electronics Disassembly and Reassembly PBA below the bottom of the Engine Shield in the 4 Carefully release the CRUM Harness with CRUM direction of arrow od Bo c2 TF so 25 KE OF CRUM Hausing CRUM PBA and remove it as shown below 5 If necessary remove the two screws securing the Scan Ass y Refer to the 5 9 should remove 1 Before you remove the CRUM Harness you 5 21 CRUM Harness From the SMPS CRUM Housing CA WIN gt NAIA y A Ik BEVS NA E Ad FAR Y NA O L N Mi
91. ions 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 KI Samsung Electronics 2 Product Specifications Product Specifications 2 1 Product Overview Basic Model SCX 4725FN 4 in 1 Flatbed MFP SCX 4725F 4 in 1 Flatbed MFP Target User SOHO Economical Speed Price Customer Customer Benefits Sales Points Compact Size 24ppm A4 24ppm Letter fastest speed in its price class Favorite Copy ID Card Copy Toner Save Key Specification up to 24ppm A4 Up to 24ppm Letter 250 sheets Multi Purpose type paper input 100 sheets Paper Output 3 000pages toner capacity 600dpi Print Copy Resoulusion Samsung Print Language 32MB System memory 30 ADF 33 6 Kbps Fax Modem 100 Speed Dial 72 Hour Battery Back up Samsung Electronics Service Manual EN Product Specifications 2 2 Specifications Product Specifications are subject to change without notice See below for product specifications 2 2 1 General Specifi
92. k 3k The life span of toner 1k 3k sheets ISO Std 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 11 2 9 Sanner Part 600dpi Color CIS Module for Flat bed SCX 4725FN 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 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 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 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 600x600dpi Platen 3 Hal
93. ll 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 25 C Service Manual Samsung Electronics Circuit Description 11 2 2 Main Board Control Part Main control part of SCX 4725FN 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 ARM 920T which is exclusive controller to execute Printer amp FAX Function and to executs opera tion block by flash memory sithin system program and ot control whale system Main function block Completely integrated System for Embedded Applications PVC Dual Single Beam LVDS Pad VDO HSYNO Support A3 1200dpi multi pass color HPVC Dual Single Beam LVDS Pad VDO HSYNC Sup
94. m 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 5msecl line 5 Scanning Width MAX SCAN WIDTH 216 mm 8 5 inches Effective Scan Width 208mm 6 ADF Motor a Motor Spec 23H 24VDC AHE 0 6A Peak Service Manual Samsung Electronics System Overview 7 Motor Driver speed amp method a FAX Transmission Normal Mode 2000 pps 2 2 Fine Mode 1000 pps 2 2 Super Fine Mode 667 pps 2 2 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 30mA 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 Output Logic H Off No Position No Paper Logic L On
95. me 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 Section Modem Part BLOCK DIAGRAM Modem CX86710 SFX338 Sound Output Implemented by based on Conexant DAA Data Access Arrangement Solution and is roughly composed of two kinds Chip Solution CX86710 SFX336 Existing Modem Chip which adds SSD System Side Device for interfacing between LSD and DIB of FM336Plus Core CX20493 LSD LIU Line Interface Unit Chip which is controlled by SSD and satisfies each PSTN Requirements by modulating internal Configuration with connecting Tel Line Service Manual Samsung Electronics System Overview Modem SFX336 specification 3 8 2 wire half duplex fax modem modes with send and receive data rates up to 33 600 bps V 17 V 34 V 29 V 27 ter and V 21 Channel 2 Short train option in V 17 and V 27 ter PSTN session starting V 8 and V 8bis signaling HDLC support at all speeds Flag generation O bit stuffing ITU CRC 16 or CRC 32 calculation and generation Flag detection 0 bit deletion ITU CRC 16 or CRC 32 check sum error detection FSK flag pattern detection during high speed receiving To
96. me carefully release the ADF Motor Harness from the Platen Housing as shown below ADF Housing Scan Motor Harness Service Manual 5 9 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 Pick Up Unit Bearing 540 Service Manual Samsung Electronics Disassembly and Reassembly 5 11 OPE Unit 1 Open the ADF Housing and insurt a flat blade 3 Remove the five screws securing the OPE PBA screwdriver into the crack as shown below and and remove it remove the OPE Unit from the Platen Housing OPE PBA j j ADF Housing Z22222 2222 IZ Z Z Z 4 Release the Contact Rubbers as shown below 2 Unplug the three Connectors Battery OPE Full Rubber Scroll Sensor as shown below AZ OPE PBA
97. mory this is caused by insufficient space on the hard disk 6 34 Service Manual 1 N o 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 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 Cause Solution _ Insufficient space on the hard disk in the directory 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 Ah How to delete the data in the spool manager 1 Delete any unnecessary files to provide more space for spool storage 2 The
98. n 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 wuss 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 E3 Service Manual Samsung Electronics Troubleshooting 6 5 11 Ghost 3 4 e Description White ghost occurs in the black image printing at 47 5mm intervals j Check and Cause Solution Digital Printer 1 The life of the developer may be expired ug TP Digital Printer Digital Printer the terminal of the supply roller 6 5 12 Ghost 4 2 The abnormal voltage and bad contact of 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 Check and Cause Solution Digital Printer The temperature of the fuser is maintained Digital Printer high WWE E9 JO Sly Digital Printer
99. n 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 fire and shock risks 8 Ensure that the power sockets and plugs are not cracked or broken in an
100. nd level 3rd level Default Value RETURN d RETURN left right amp amp Enter pp 3 Copy Setup 4 Default Change p 4 Fax Setup only SCX 4725FN 4 Receive Mode 5 Fax Feature 4 Delay Fax p 6 Advanced fax 4 Toll Save p 7 Reports 4 Phone Book 14 character Default Change left right amp amp Enter Darkness Light Normal Dark Normal Original Type 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 A5A4 141 25 50 150 200 400 Custom 25 400 No of Copies 1 99 Timeout Receive Mode Off 15 30 60 120Sec Off Fax Tel Ans Fax Ring to Answer 1 7 Darkness Light Normal Dark Normal Redial Term 1 15Min 3minutes Redials 1 13times 2times MSG Confirm On Off On Error On Error Image TCR On Off 2 1 2 3 4 5 6 7 8 Auto Report On Off Auto Reduction On Off Discard Size 0 30mm RCV Start Code 0 9 DRPD Mode Delay Fax set Enter Number Priority Fax Enter Number Add Page Operation Not Assigned Cancel Job Toll Save Operation Not Assigned Start Time End Time Junk Fax Setup Fax Secure Receive On Off Print Prefix Dial FAX x
101. ne modes and features Programmable single or dual tone generation DTMF receiver Tone detection with three programmable tone detectors Receive dynamic range 0 dBm to 43 dBm for V 17 V 29 V 27 ter and V 21 Channel 2 9dBm to 43 dBm for V 34 half duplex Digital speaker output to monitor received signal Two16 byte FIFO data buffers for burst data transfer with extension up to 255 bytes V 21 Channel 1Flag detect V 21 Channel 1Flag detect 3 3V only operation Typical power consumption Normal mode 264 mW Service Manual Samsung Electronics System Overview Signal Transition of DAA Solution Line Interface Signal of Tel Line and LSD is Analog Signal 2 there is A D D A Converter in LSD so Analog Signal from Tel Line is converted in Digital through A D Converter in DAA and transfer to SSD by DIB Capacitor Digital Signal from SSD is converted to Analog by D A Converter in DAA and transfer to Tel Line CX86710 SFX 336 DSP SSD System Side Device Transformer transfer Clock from SSD to LSD and Clock Frequency is 4 032MHz LSD full wave rectifies Clock to use as inner Power supply and also use as Main Clock for DIB Protocol Sync between LSD and SSD Transformer transfer Clock by separating Primary and Secondary and amplifies Clock Level to LSD by Coil Turns Ratio 1 1 16 E Clock Clock is supplied by transformer from SSD to LSD and t
102. ne 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 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 10 Service Manual Samsung Electronics Alignment and Adjustments 4 2 5 Machine Test SWITCH TEST Use this feature to test all keys on the operation control panel The result is displayed 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 OK gt gt ROM TEST Use this feature to test the machine s ROM The result and the software version appe
103. nsor 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 3 2 Service Manual Samsung Electronics System Overview 3 1 4 4 Pressure roller The Pressure Roller mounted under the heat roller it is 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 Safety 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 the front cover is opened The temperature of the fuser cover s surface is maintained at less than 80 C to protect the user and a caution label is attached where the customer can see it easily when the rear cover is opened Service Manual Samsung Electronics System Overview Case part figure STACKER CO
104. nt quality To turn the toner save mode on or off press Toner Save If the button backlight is on the mode is active and the machine uses less toner when printing a document e If the button 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 lt or until Power Save appears on the bottom line Press Enter 3 Press the scroll button 4 or 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 4 or until the time setting you want appears The available options are 5 10 15 30 60 and 120 minutes Press Enter to save the selection To return to Standby mode press Stop Clear Service Manual KI 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 e 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 u
105. o 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 m de 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 6 36 Service Manual Samsung Electronics Troubleshooting 6 12 SyncThru Installation Problems File Transfer Error message appears during 1 Make sure
106. om 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 CO 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 _ Insufficient space of the hard disk in the directory assigned for the basic spool 2 If the previous printing error not solved 3 When 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 Ah 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 jnl 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
107. ommend 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 nu a nin LCD Display 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 y and the main Board in sequence e Description Pressing keys does not cause the set to respond correctly Check and Cause Solution 1 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 y and the Main board in sequence KI 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
108. on the video data sent by PVC LSUC sends the completed video data LSU_VDO to the laser diode in LSU Also LSUC supplies LSU_CLK created by counting the system clock with the operation clock source of LSU for the use of substitution for oscillator The SFR is set up in IsuSfr block by receiving the bus control signal from APB bus and the settled register values are redelivered to IsuCon block IsuCon block creates a signal for controlling the laser diode of LSU and outputs it to a pad The digital filter module is a digital filter to provide against the noise loaded in nHSYNC and nLREADY signal which directly get into the chip It is three layer filter and the delay time is 3 System Clock Time The interface between PVC and LSUC is shown in the picture gt nHSYNC LSU_VDO gt PVC_TEST_EN gt nLSYNC PVC_TEST_EN nFSYNC gt gt nFSYNC VDO 114 Service Manual Samsung Electronics Circuit Description PWRITE PSEL PENABLE PADDR 4 0 PWDATA 31 0 PRDATA 31 0 APB BRIDGE nPSync PVC LSUC DigiFilter nLREADY FO DigiFilter nHSYNC_FO nLREADYFlag flagClear suControl 8 0 IsuSfr windowOnTime 20 0 window OffT ime 20 0 dOnTime 20 0 dOffTime 20 0 patternDuty 9 0 suCIkDuty 18 0 SHOnTime 20 0 SHOffTime 20 0 APCCON 11 0 apcOnTime 20 0 apcOffTime 20 0 Pmax 9 0 Pmin 9 0 Ka 14 0 REF 24 0 Kp 15 0 Ki 4 0 Ky YMAXH 8 0 YMAXL 31 0 YMINH 8 0 YMINL 31 0 YINITH 8 0 YINITL
109. or 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 e Spotting a refilled cartridge by eye One way security screws are used in the manufacture of the cartridge check if these are damaged Service Manual 6 30 E 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 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
110. ot 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 j SS Check and Cause Solution Digital Printer Diai 1 The pressure force on the left and right 1 Replace both the left and right Spring igital Printer Big springs of the transfer roller is not even Holder Digital Printer the springs are damaged the transfer Digital Printer roller is improperly installed or the trans Digital Printer fer roller bushing or holder is damaged 2 The toner level is not even on the devel 2 Occur in the developer cartridge replace oper roller due to the bad blade the developer and try to print out 6 5 8 Background e Description Light dark background appears in whole area of the printing EN 8 Check and Cause Solution Digital Printer FI Diaital Printer 1 Does character exist less than 2 1 The toner cartridge is basically igi per a page and hasn t it been used designed to print 3 000 sheets with Digital Printer long time 5 image Digital Printer Digital Printer 2 Does recycle paper be used
111. paper is stuck in the discharge roller and in the fuser just after passing through the Actuator Feed Solution Check and Cause 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 lt 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 e Check whether burrs occur in the assembly part of the actuator exit or not and if the actuator is smoothly operated 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 th
112. per does not pass the exit sensor within a certain time of the paper leading edge activating the exit sensor ENGINE SHIELD ASS Y Fuser TONER CARTRIDGE LSU EXIT ROLLER O OPC O PICK UP ROLLER KNOCK UP PLATE O KNOCK UP PLATE DOWN D ASS Y HOLDER PAD FEED SENSOR MAIN PBA SMPS HVPS KI Service Manual Samsung Electronics Alignment and Adjustments 4 6 3 Clearing Paper Jams When a paper jam occurs Paper Jam appears on the display 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 Open Close toner 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 pulling it straight out 2 Open and close the front door to resume printing Samsung Electronics Service Manual D 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 r
113. pgrade 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 the 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 Atthe 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 Ipt1 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 telepho
114. phanumeric 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 the 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 KI Service Manual Samsung Electronics Alignment and Adjustments 4 2 3 3 Setting the Date and Time When you turn your machine on for the first time the display prompts you to enter the current date and time After entering it will not appear anymore For the SCX 4725FN all of your 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 jp to display Date amp Time on the bottom line and press Enter Enter the correct time and date using the number keypad For the SCX 4725 press the scroll button 4 or 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 4 or to move the cursor under the
115. port A4 600dpi multi pass color DMA 6 Channels if not use CIP4e Ach is available for exfernal DMA if CIP4E used a DMA channel use 2ch available for external DMA Operation Frequency CPU Core gt over 300MHz System Bus gt 100MHz Operation Voltage CPU Voltage gt 1 2V I O Pad Voltage gt 3 3V RTC Voltage gt 3V 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 Capcity 16 Mbyte NOR Type 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 32 Mbyte Access Time 166MHz Max Data Backup 48 Hours Backup Battery Charging Time 100hours when completely discharged ma Service Manual Samsung Electronics Circuit Description 11 2 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 sen sor is used for ADC input then is converted to 8 bit digi
116. py 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 gt 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 2 4 ID Card Copy Service Manual 2 up Yes ADF Only 4 up Yes ADF Only Collation Yes ADF Only Autofit Yes Platen Only LD Card Copy Yes Platen Only Clone Yes Platen Only Poster Yes Platen Only Samsung Electronics Product Specifications 2 2 0 Telephone Specificationc Handset No On hook Dial Yes Search Yes Phone Book 1 Touch Dial 10 ea 0 9 Speed dial 90 locations 10 99 T
117. re may be files from previous failed print jobs on the hard disk with the name in the form nt 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 must wait for a time out Samsung Electronics Service Manual Troubleshooting 6 11 Windows Problems Problem Solution After installing PortThru the print server name 1 Verify that the printer power switch is turned on and the READY is not displayed under New Print Server in message is displayed on the printer front panel SyncThru Verify that the LAN cable is plugged into the PortThru card There are 2LEDs on the PortThru card One should flash irregularly and the other should be on If this is not the case ensure
118. rless Loading contrast 5 orless Output Voltage Rising Time 50 ms Max Output Voltage Falling Time 50 ms Max Output Loading range 102 1000 HQ Output Control Signal BIAS PWM Active Low PWM signal for controlling MHV d Supply Output Voltage 550V 50V 5049 Load Input contrast of the output stability degree under 5 Yo Loading contrast 5 orless Output Voltage Rising Time 50 ms Max Output Voltage Falling Time 50 ms Max Output Loading range 10 MQ 1000 IQ Output Control Signal BIAS PWM Active Low PWM signal for controlling MHV 3 7 FUSER AC POWER CONTROL The Fuser HEAT LAMP 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 tumed 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
119. rt train option in V 17 and V 27 ter PSTN session starting V 8 and V 8bis signaling HDLC support at all speeds Flag generation 0 bit stuffing ITU CRC 16 or CRC 32 calculation and generation Flag detection 0 bit deletion ITU CRC 16 or CRC 32 check sum error detection FSK flag pattern detection during high speed receiving Tone modes and features Programmable single or dual tone generation DTMF receiver Tone detection with three programmable tone detectors Receive dynamic range 0 dBm to 43 dBm for V 17 V 29 V 27 ter and V 21 Channel 2 9dBm to 43 dBm for V 34 half duplex Digital speaker output to monitor received signal Two16 byte FIFO data buffers for burst data transfer with extension up to 255 bytes V 21 Channel 1Flag detect V 21 Channel 1Flag detect 3 3V only operation Typical power consumption Normal mode 264 mW 11 10 Service Manual Samsung Electronics Circuit Description 11 2 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 thatthe printing image can be made up on the OPC Drum 11 2 6 Line Interface Part Line interface part helps the machine connect to the PSTN or PABX Line Its main
120. s DO Ze Press Menu until Machine Setup appears on the top line of the display Press the scroll button 4 or jp until Language appears on the bottom line of the display Press Enter The current setting appears on the bottom line of the display Press the scroll button or 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 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 button to delete the last digit 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 O button For details on how to use the number keypad to enter al
121. s in Loading Paper Ensure that the adjustable guides are positioned correctly e Do not overload the tray e Do not remove paper from the tray while your machine is printing 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 4 24 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 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 al Replace only with authorized components o Do not force plastic material components 7 Make sure all components are in their proper posi tion Releasing Pla
122. s x 2 line Clock Date display System Status display Alarm Error Message display Function Dialog Message display Samsung Electronics Service Manual System Overview 3 6 SMPS amp 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 make 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 CON2 CON2 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 10A 2 7A within 1ms Duration 6 RIPPLE NOISE Voltage
123. sage display HE Service Manual Samsung Electronics ELECTRONICS This service manual is a property of Samsung Electronics Co Ltd Any unauthorized use of Manual can be punished under applicable international and or domestic law Samsung Electronics Co Ltd August 2006 Printed in Korea VERSION NO 1 00 CODE JC 01791 This service manual is also provided on the web the ITSELF system Samsung Electronics Co Ltd http itself sec samsung co kr
124. stic 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 KI 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 disassembly 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 you can get harm 3 When you move the printer This printer weighs 11 2kg including toner cartridge and cassette Use safe lifting and handling techniques
125. stic 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 Y 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 Toner Cartridge Samsung Electronics E Service Manual Disassembly and Reassembly 5 3 Pick Up Roller 1 Before you remove the Pick Up Roller you should 2 When if only remove the Pick Up Rubber first pull remove the Pick Up Hausing A with Rubber from the MP Tray Refer to the 5 2 Housing B in the direction of arrow and then release the Pick Up Rubber from the Housing A as shown below Housing A with Rubber 5 4 Front Cover 1 Open the Front Cover 2 To remove the Front Cover first pull the part below the right side of the Front Cover with a light pressure to the direction of arrow left Service Manual Samsung Electronics Disassembly and Reassembly 5 5 Cassette Tra 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 Cassette Tray
126. tal 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 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 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 Samsung Electronics Service Manual gg Circuit Description 11 2 4 FAX Modem Part 1 Modem Part The modem part is consist SFX336 FAX Modem chip LIU Line Interface Unit and Data Access Ayyangement DAA Modem SFX336 specification 2 wire half duplex fax modem modes with send and receive data rates up to 33 600 bps V 17 V 34 V 29 V 27 ter and V 21 Channel 2 Sho
127. 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 windows system32 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 r 6 37 Samsung Electronics 7 Exploded Views and Parts List Exploded Views amp Parts List 7 1 7 2 7 3 7 4 7 5 7 6 7 7 7 8 7 9 Main Cover Housing Front Cover Rear Cover Frame Ass y ADF Ass y Platen Cover Ass y Platen Ass y OPE Unit 7 10 RX Drive Unit 7 11 MP Tray 7 12 Fuser Unit 7 13 Paper Path Ass y 7 14 Pick Up Unit 7 10 7 11 7 12 7 13 7 14 7 15 Way to observe Part Code amp Description standard it will help with ordering Part There are two kinds of Part code inscription type Part code and Description is quoted and controlled by determined standard Refer to this determined ex 2007 007961 R CHIP It shows part specific ex JB96 01268A ELA UNIT COVER TOP
128. 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 o N gt The print server name is displayed 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 attempting 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 pr
129. tion The image PC scanned is not clear or bad Check and Cause Solution 1 Use TECH mode to carry out a shading test and examine the waveform printout 2 Check if the resolution is set too low in PC Scan options Refer to User s Manual 1 If the CIS waveform form is abnormal replace the CIS Assy 2 Teach the user about scanner resolution refer to the User Guide Samsung Electronics Service Manual 6 29 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 toner 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 f
130. tor is always higher than 6 within the normal control temperature rage Functions of the Malfunction Protection If the fuser port P3 7 is turned on regardless of controlling due to system malfunction the tempera ture of the heat roller goes abnormally high At this time the resistance value of the thermister becomes low When the resistance value of the thermister becomes low the electric potential of the circled A gets low and when the temperature goes over the certain temperature the comparator U11 gets a low output As a result even though the fuser port is abnormally activated it is disable to be over the regular tem perature For maintaining a regular temperature a protect circuit consists in it This protection is set up to start operating at the rage between 205 2109 EA Service Manual Samsung Electronics Circuit Description 11 1 2 PWM Controller m Function Description PWM TIMER consists of each sub block which has various functions The sub block is divided based on this block diagram The entire diagram of the PWMTIMER is organized as below PWMCONO PWM PWMSDIVO IN ECO CONTROLLER PWMO PWMDUTYO 0 PWMCON I PWM PWMSDIV1 PWMCYC1 CONTROLLER PWM1 PWMDUTY1 1 PWMCON2 PWM PWMSDIV2 PWMCYCS CONTROLLER PWM2 PWMDUTY2 2 PWMCON3 PWM PWMSDIV3 CC CONTROLLER PWM3 PWMDUTY3 3 PWM TIMER OPERATION is figured out if calculating PHCLK by the value selected by the register setting and the divider PH
131. turned off 1 Triac feature 16A 600V SWITCHING 2 Phototriac Coupler PC102 Turn Onlf Current 15mA 50mA Design 16mA High Repetive Peak Off State Voltage Min 600V 3 18 Service Manual Samsung Electronics 4 Alignment and Adjustments 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 p 1 Paper Setting Paper Type pp 14 character Paper Type left right amp amp Enter Plain Paper Thick Thin Bond Colored Card stock Labels Transparency Envelope Preprinted Plain Paper 2 Machine Setup Machine ID p Paper Size Machine ID Only SCX 4521F A4 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 hours 12hours Language English FRANCAIS Espanol Portugues Deutsch Italiano Pycckn Norsk Polski Suomi Magyar Dansk Solvencina cestina Svenska Turkse 16 language English Power Save On Off 5 10 15 30 45 min Ignore Toner On Off Select Country Samsung Electronics Service Manual EN Alignment and Adjustments 1st level 2
132. ution 1 Bad contacts of the voltage terminals to developer 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 Description 2 White spots occur periodically in the printing 1 Dark or blurry black spots occur periodically in the printing Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Check and Cause Solution _ cally the rollers in the Developer may be contaminated with foreign matte or paper particles Charge roller 37 7 mm interval 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 Ifa 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 unremova
133. utton 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 4 or to scroll through the options Press Enter when you see the desired sound option 3 Press the scroll button 4 or 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 KI 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 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 pri
134. ver Housing gt 7 73 FrontCover 6 CC 7 4 Rear Cover u 0 m 8 e 2 7 5 Frame Assy gt lt s s so ee ee o 7 6 ADFASSY ee e 7 7 Platen Cover ASSY 7 8 Platen ASSY 2 7 9 OPE Unit 7 10 RX Drive Unit 7 11 MP Tray 7 12 Fuser Unit 7 13 Paper PathAssy 7 714 Pick Up Unit re nennen 7 Block diagram 8 1 System Block Diagram 9 Connection Diagram 9 1 Connection Diagram Reference Information 10 1 Troubleshooting Tools 10 2 Acronyms and Abbreviations 10 3 Selecting printer locations s so so sao 10 4 Sample Tests Patterns 11 Circuit Description 11 1 Engine Controller rennen 11 2 System Overview 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 replacement parts There are no user serviceable parts inside the printer Do not make any unauthorized changes or additions to
135. ween H R and Thermistor If contaminated clean the area Description Blank page is printed not to be deformed 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 e 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 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 again 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 Bid 4 Check that the SPEAKER
136. xxxx 5 digits Stamp RCV Name On Off ECM Mode Phone Book Sent Report RCV Report System Data Scheduled Jobs MSG Confirm NIOO AJOIN HAH MD A u Junk Fax List On Off KI Service Manual Samsung Electronics lt continue gt 1st level 2nd level 3rd level Alignment and Adjustments Default Value RETURN d RETURN left right 88 Enter 8 Network Setup only SCX 4725FN 4 Reset Network p 14 character Reset Network left right amp amp Enter Yes No Config Network TCP IP Ether Talk Manual DHCP BOOTP Setto Default Yes No 9 Sound Volume Print Net CFG Speaker Yes No On Off Comm 4 Speaker p Ringer Off Low Med High 0 Maintenance Clean Drum Key Sound On Off Alarm Sound Clean Drum On Off Yes No Auto Cleaning On Off Notify Toner All Settings AJIN A vN gt A UIN Clear Memory Clear All Mem Paper setting Copy Setup Fax Setup Fax Feature Advanced Fax Sent Report RCV Report Phone Book 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 mod
137. y 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 103 Reference Information 10 3 Selecting printer locations e Leave enough room to open the printer trays covers and allow for proper ventilation see diagram below e Provide the proper environment Afirm 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 10 4 Service Manual Samsung Electronics Reference Information 10 4 Sample Tests Patterns The sample patterns shown below are the standard test patterns used in the factory The life of the toner cartridge developer cartridge and printing speed are measured with the pattern shown below The A4 ISO 19752 standard pattern samples are reproduced reduced to 70 of the actual A4 size A4 ISO 19752 Standard Patterns x KLMNOPQRSTUVW HIJKLMNOPQRSTUVWXYZ01 03456789ABCDEFGHIN BCDEFG Stephen J Singel Labanda Sinpat Abarress Tendar BSF URANGLE LSA Funtres Solber Netener 23 January 2004 Jonathan Q Maderia Inpert Mampem Abaress 2343 Stantin D
138. y 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 KI Service Manual Samsung Electronics Precautions 1 2 3 Handling Precautions The following instructions are for your own personal safety to avoid injury 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 so could cause the printer to tip or fall 2 The printer contains many rollers gears and f
139. ytes CRUM 06090236445 ga Service Manual Samsung Electronics Alignment and Adjustments 4 3 Control Panel 4 3 1 Control Panel Functions SAMSUNG Start Stop Clear su KE SCX 4521F Adjusts the brightness of the documents for the Darkness R 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 ve gon Favorite Copy Allows you to use one of the special copy features such as Clone Copy Collate Autofit ID Card Copy 2 4 Up and Poster eo EEE Displays the current status and prompts during an operation Uses to scroll through the available options for the selected menu item Confirms the selection on the display Enters Menu mode and scrolls through the menus available 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 Number Keypad Dials a number or enters alphanumeric characters Reperence This Model is Test page not Support Samsung Electronics Service Manual gg Alignment and Adjustments Adjusts the resolution of the documents for the Resolution

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