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1. 1 2 3 4 B 7 8 vec vec vec vec C261 270pF vee 3 3VM 12V C254 1 EB u47 239 6217 198 x Sri ae 20254 LD1117DT33C 90814 R226 A 2 us2 40K IN Soo 4 _ 2223 263 25 T 18 idm 5 VIN CD nSPK CTL 189nF 16V VEE VDD L 250 INH VSS Fenn Bode 2 2 vol gt SPK SN 3rc1 vos C SPK TE 0216 0207 2186 183 2182 cza1 x cess 260 NC34119082 JoonF aonF DONE BEND 2am 267 lt gt on 2205 199 T B 021 C218 x ine EE BSSSSPPP EE 5091411 nF 92 KA eo volo C240 SSSssesesssss vec A amp amp amp amp amp Laz 46 4 Vat 10077 BOBABaAd wo TALK 5 0140538 3 9M vedere CSS D OGND
2. 1 2 3 4 5 6 7 8 ED NO REVISION RECORD CHANGE PART 24V 5V E 10977 10007 Leis A T 10 iE INSTPAR lt gt 64024 R21 56 28 22 R15 4 15K lt J TAG ADF A lt 0 18 Is Kes 1 sl PME Be MA I 7 1Y2 1A4 ADE_A 29 lt Tarn 14 11 525 ADE NA 2M Pl IBO ADE Re liva E 1181 gt 3 2Y1 2 E 35303 0458 B D TEA37180P ADF MOTOR Seva 5 3 end24 L3 16 INSTPAR 10 is GND 260 5 RS 0 33 Les R20 TK EE CDT4HC2 20 m CN4 1 2 5 2 C DETECT C E Ed a 35303 0350 DETECT SENSOR EE iBBnF T iB nF EE ER NSTPAI CND24 2 7 ADF B 3 aap a D 5085 gt yp ADF NB C w 1 re 2 52 BESEG 24 sv 1 2 5 4 2 POSITION TEA37I8DP E 2 1 Rek 8000 4 35303 0556 GND24 co 2 POSITION SENSOR
3. F1 C CX104224 c2 F2 BD1 TNR2 ce andy TNR 14vis2k 1 C CX104224C Cv222 N LF2 C Cx104224 D3SB60 Y ANUS I WAY 1 7 24 GOV 1O00uF AC INPUT p 1 C 85V 135Vac TH1 E 5659 4 24 3 L2 A ACINPUT N om 40 LE 72 ET O 4 D5 B TNR1 INR14D561K R1 1W560KJ 7 O WA BSA R41R42 R43 c22 200v820uF D10LC20U SSVAIAOGOUETW ici R4 4 1 2W100KJ C cv222 GND es 7 22 R5 ca 2W100KJ C MYN630V103 AW TOOK L4 24 BYV 26E 35V100UF C25 D1NL20U 6 35V100uF IN our 5 5 12V R23 c18 4 a 1 4W100J 630V333K ae l R17 I eu 2 3 n R11 52 C42 D1NL2OU 1 8W513 1 1 200 1 4 1 C MY50V104 t D t Md 4 BTA12 600B 1 8WAT7OJ ds 4 4 2 T 1008 1270 AA Lac R12 13 R37 C34 1 6W2 2J 4 8W1KJ R14 ies D9 A 1 8W120J 10v3300uF al 1 8W24J 7653 5 4 w 19 g SB560 sv R22 S21ME4FY 4 9 4 1W180J 4 22 R9 2 12 1 meon R24 0 4 0 35V33uF 3 1WATJ Y D8 B Z 8856 gt 4204 772 226 R2 C MY50V104 4 1WATJ R11 4 R10 Rie R
4. 1 2 3 4 5 7 8 24V vec INV POWER INV POWER 00 6232 822 807 860 vec bis 22 588113808 Rd 5 INSTPAR IN 1 A 5151048 vec c gt 216 INSTPAR 144 CN2 1 GND S16 1048 2 A DF 11 2 40P 2 gt 100 28 IN pe TU OUT 3 z 1 ele 86 gt 278 R R70 T mein 199 oo 52 Hr 5 4 gt CCD DEN Vis l 5 INSTPAR gt 44 INSTPAR 2306 e lt 5 gt SCAN_ADF_PHA ICCD_TG 031 Ty Stour c 4 Troonr 215 T S 1 B3 AS gt ADFM_IAC1 8 gt Secocuki o s 8307 29 a gt ADFM_IACO 1 2309 39 rd 1 lt gt ADFM IBCOD 12 BEND 210 DENG 18 R308 29 CCD CLK2 580 gt _ _ o gt z 8286 np 104 MODULE DETECT co 1 0 85 Razon 1147 520 3 c gt RRI As gt ADFM_IB 1 125 4 LAMP gt i 5 J ADF P POS CCD CP gt ADF __P_DET eS Sis __ T ie i ADF _P_REGI 18 VOUT R 5 C28 VOUT G ps p 024 lt Se Tz LEES LER Deo 1 i 2 i t 2 vec vec Ceo DGND R2 R3 R1 10K 10K 10K 17 RE 100 gt lt gt OPE_RXD 18 5 dra 18 8 61 3 A OPE TXD iy vee C28 PS
5. PL ST S o 8 con buy Pe Pon 0 ie m o 7 7 35 Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization CIRCUIT DESCRIPTION nDRAMCAS3 DRAM Cas Strobe 3 8 mA nDRAMRASO b DRAM Ras Strobe 0 8 mA pw sw nDRAMRAS1 DRAM Ras Strobe 1 8 mA DRAMDO DRAM Data Bus 0 PHBTT12 12mA a m d DRAMD1 DRAM Data Bus 1 PHBTT12 12mA DRAMD5 DRAM Data Bus 5 PHBTT12 12mA DRAMD8 DRAM Data Bus 8 PHBTT12 12mA ERN DRAMD9 DRAM Data Bus 9 PHBTT12 12mA DRAMD12 DRAM Data Bus 12 PHBTT12 12mA Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization CIRCUIT DESCRIPTION DRAMD13 DRAM Data Bus 13 PHBTT12 12mA DRAMD17 DRAM Data Bus 17 PHBTT12 12mA Cw ws Pw 3 DRAMD18 DRAM Data Bus 18 PHBTT12 12mA DRAMD22 DRAM Data Bus 22 PHBTT12 12mA ee DRAMD23 DRAM Data Bus 23 PHBTT12 12mA DRAMD27 DRAM Data Bus 27 PHBTT12 12mA a 9 DRAMD28 DRAM Data Bus 28 PHBTT12 12mA DRAMAO Do DRAM Address Bus 0 8 mA 3 8 Repair Manual Samsung Electronics Th
6. CN5 4pin USB Conn BIN FULL CN15 SENSOR P FEED Ru a SENSOR 2 GE CN14 m CN18 1 1284 Conn CN19 1 36pin i 2 i CN21 CN23 CN25 26 CN27 for System States view er Modular JACK Extrnal LINE 2 conte MPSOL i 1 8 nHGDG 9 nRI NG DET 1 1 1 1 1 1 1 2 458 1 MI CRO 1 2 SIGNAL 1 110 5 11 12 905 TEL LINE SENSOR 5 ad SWITCH 113 REAL 14 DP ANE 14 24 8 1 FOR LSU 5VS CUT Se a Ses Ss Be Sie Se Ss SS ONLY SCX 5312F Samsung Electronics 7 1 Connection Diagrams Memo 7 2 Samsung Electronics Repair Manual Digital Laser MFP 1 Block Diagram 2 Connection Diagram 3 Circuit Description 4 Schematic Diagrams This Service Manual a property of Samsung Electronics Co Ltd Any unauthorized use of Manual can be punished under applicable International and or domestic law This manual is made and described centering around circuit diagram and circuit description needed in the repair center in the form of appendix Samsung Electronics Digital Printing CS Group Copy
7. component Check HVPS contacts and Developing NO HVPS s self NO Transfer Isupplying voltage output voltage is set to normal 300V gt f failed standard 500V repair replace YES HVPS YES Irregularity of NIP Repair or replace HVPS between rollers in developer gt Replace developer Check and Repair or replace the terminal contacts Adjust the Bias voltage or replace HVPS Bias voltage is OK 300V NO Samsung Electronics Operating storage temperature is too low or not recommended There may be a problem in toner layer control in toner cartridge gt Replace the developer Use the machine with recommended paper and at condition Troubleshooting Black Spot Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Is it regular interval of 38mm When taking out the cartridge toner leaks Bad image removes by scratching NO The problem occured since the obstacles stuck to charge roller gt Clean the Charge Roller and then reprint 4 28 Toner leaks and much toner material dropped onto the paper gt Replace the developer Check toner is stuck onto the P R or H R in fuser gt Clean it or replace randomly occurred The problem due to the toner fallen
8. RTC CLK gt e gt gt NZ COMPANY NAME ii jacho i1 meme MCKINLEY V2 4 DRAM amp RESET amp RTC Changed Monday August 27 2001 6 Repair Manual Samsung Electronics This Document not be used without Samsung s authorization SCHEMATIC DIAGRAMS Main Circuit Diagram 4 14 AC2 23 U29 CFONT_H CCD CP CJ dvi CCD RS lt 1Y2 CCD CLK2 3 CCD CLK1 C3 23 1 4 CCD TG 3 2Y1 272 2Y3 eva 1G GND 2G 41 U28 FONT_L gt CO74HC 124 4M C350 33pF 6349 33pF C348 33pF 0254 0 068nF 0353 0 068nF C352 0 068nF nFONT 68 552 KM2 3C8 10506 LOW ngineer 880710 TITLE MCKINLEY_V2 4 FONT ROM amp CCD AFE hanged Tete Changed REV Nunb 9 Monday August 27 2001 FEY rawing Number Sheet 4 of PT 0 07 _____ 8 ____ Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization SCHEMATIC DIAGRAMS Main Circuit Diagram 5 14 CNI 1 1 787780 1 RIQA a 100K RIJN 33 j RU Ay 22 3 4 ___ LG
9. gt 8199 vec 2 Ri aig m A 123456 400CD CLK 1 i MOTOR 2 HE SMPS HVPS B T En ASNE 1 112000 CLK2 MTR2 1 B 1 12 455 i deep FLAT ou Me pum 13 905 114 0CD RS GNE ADEN E t 4 nLDON DUPLEX SOL 1156905 21436587 10912111413 161518172 19222121 B 112 MODULE DETECT are 21436587 109 12111413 161518172019222124 23 1160000 113 117 905 114 PPS ASUCLK 11465 25V 4805 4 35V SONDS amp 5 7500 11890 12 i IE EDLREADY 18 12 9 00 10424 11 GND 12 24V 13 0020 119 VOUT_R 9 ADEIBO T ADEPIB TLMONLEDEE 12 AF IR i 114 3 15 16 424 51 17 18 2491 120 6 113 ADEP POS 16 16 ADEP 17 110 GND24 118 THREAD 20 FUSERON 21 22 SPK 23 DEVPW 121 VOUT B M amp CPERST 19 2 FLALOOER 21 227 2231MB 1 j 1 122 Q0 12 124 TMNB 2345678 910 11 12345678 910 111213144 151617 18 1920212223 24 23456578 9T T T2139 1617 T8 920212223 CN5 CN8 CN2 CN11 x 4 1 USB Conn BIN FULL SENSOR CN15 CN16 CN17 CN14 36pin i CN18 E1284 Conn CN19 CN21
10. 5 8 Samsung Electronics Exploded Views and Parts List 5 3 ADF ASS Y Exploded View amp Parts List Samsung Electronics 5 9 Exploded Views and Parts List ADF Ass y Parts List Service Available NO DESCRIPTION SEC CODE Q TY SA REMARK 0 AS ADF ASS Y FRU JC81 00429A 1 1 UNIT PLATEN COVER ASS Y JC97 01585A 1 1 1 PMO TX STACKER JC72 00745A 1 1 2 IPR WASHER SPRING CU JF70 10616A 2 1 3 PMO DOC GUIDE L JC72 00839A 1 O 1 4 PMO DOC GUIDE R JC72 00838A 1 O 1 5 PMO GEAR PINION JF72 41354A 1 1 6 MEA UNIT HINGE 55 JC97 01586A 2 1 6 1 SPRING ETC HINGE PLATE 1 1 6 2 PLATEN 1 1 6 3 ICT BUSHING HINGE 1 1 6 4 5 ii 1 X 1 6 5 ICT SHAFT HINGE 2 1 1 6 6 1 1 7 RPR ROLLER EXIT IDLE JC73 00091A 2 1 8 IPR SHAFT EXIT JC70 00242A 1 1 9 NPR SPRING PINCH DRIVE JB71 00038A 2 1 10 PMO COVER PLATEN JC72 00738A 1 1 11 PPR SPONG SHEET JC72 00751A 1 1 12 PPR SHEET PLATEN JC72 00750A 1 1 13 IPR SPRING PINCH JC70 00260A 3 1 14 ICT SHAFT PINCH JC70 00265A 3 O 1 15 PMO ROLL PINCH JG72 40663A 3 2 MEA UNIT ADF UPPER ASS Y JC97 01581A 1 2 1 PMO COVER ADF UPPER 1 X 2 2 PMO ADF RUBBER i 1 2 3 PMO HOLDER ADF 1 2 4 RPR SPONGE ADF
11. lt External interface with CIP3 gt 20 Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization CIRCUIT DESCRIPTION AIN ADC_REFT ADC_REFB AFE 12 bit AID converter 1024x8 R LED GLED nd BLED EXT SRAM L PM 2 i 4 Sensor Shading Acquisition Interface Shading Correction Vertical Decimation SRAM A 15 0 RIG B ue Correction SRAM_nRD SRAM nWR Image Processing Enlargement Module Reduction 4096 x16 IRQ Interrupt Vpeak Control Control Motor TX B Control nTXA B EN2 CIPS Interface Module Register nCS nRD nWR 5 0 D 15 0 nXDREQ nXDACK Block diagram of CIP3 gt Samsung Electronics Repair Manual This Document can not be used without Samsung s authorization CIRCUIT DESCRIPTION 3 4 HOST INTERFACE Referred to IEEE 1284 standard 3 4 1 HOST INTERFACE PARALLEL PORT INTERFACE PART KS32C61200 has the Parallel Port Interface Part that enables Parallel Interface with PC This part is connected to PC through Centronics connector It generates major control signals that are used to actuate parallel communication It is comprised of ERROR PE BUSY ACK SLCT INIT SLCTIN AUTOFD and STB This part and the PC data transmission method support the method specified in IEEE P1283 Parallel Port Standard
12. Y 23 cN25 26 CN27 for System States view MP SOL cont 11 2 60 12 13 MXEM DA 4 MDEMTX 15 12 6 7 1 18 nHd Q 9 nRING DET Modular JACK LINE SWITCH ra une a ees ea Se ee ey ONLY SCX 5312F Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization CIRCUIT DESCRIPTION 3 Circuit Description 3 1 Main PBA 3 1 1 SUMMARY The main circuit that consists of CPU MFP controller built in 32bit RISC processor core ARM7TDMI including various I O device drivers system memory scanner printer motor driver PC I F and FAX transceiver controls the whole system The entire structure of the main circuit is as follows 056 PROGRAM DATA RAM 20 MHz ROM DRAM 1MB x 8MB x 2EA POWER ON RESET ROM SRAM FLASH ROM Control 4 Bank Cache 8KB sna sng nuo sks Sns sks nuo 10 EDO FPM Control CPU BUS DRAM 6 Bank Interface Block Control 4 Bank JRST OUT Interrupt IXDACK Control 4 External SYSTEM BUS 74 Interface Block NEE sos cs em Timer E INTERFACE Generator OSC Video 45 3928 MHz OPE PANEL INTERFACE Engine
13. COMPANY NAME Lee Hee Joo City s Changed by Date Changed QA CHK REV Drawing Number Sheet oF jachoi 10 Friday April 27 2001 9 23 18 uw u gp e SS 28 Repair Manual Samsung Electronics This Document not be used without Samsung s authorization
14. 1 11 PUSH DEVE 5 2 12 SIDE OPEN JC72 00781A 1 13 PMO COVER FRONT DUMMY 1 14 ELA M MEDIO AUD SPEAKER JC96 01607A 1 Only SCX 5312F Service available Service not available 5 22 Samsung Electronics 5 10 Pick up Ass y Exploded View 4 Parts List Pick up Ass y Parts List N 2 o Exploded Views and Parts List SA Service Available NO DESCRIPTION SEC CODE Q TY SA REMARK 0 ELA HOU PICKUP ASS Y JC96 02180A 1 O 1 IPR GND FEED 1 1 X 2 IPR GND INPUT JC70 00235A 1 3 IPR GUIDE INPUT JC70 00222A 1 4 PMO ACTUATOR EMPTY JC72 00719A 1 5 PMO BEARING SHAFT JC72 41191A 1 6 PMO BUSHING_P U MP A 1 X 7 PMO FEED SENSOR T 1 X 8 PMO GUIDE PAPER 1 9 PMO HOLDER SENSOR FEED 1 10 PMO LENS TONER SENSOR 1 11 PMO PTL PATH 1 X 12 PMO SHAFT PICK UP 1 1 X 13 RPR RUBBER PICK UP JC73 00086A 2 14 SPRING PICKUP JC61 00482A 1 16 PBA SUB FEED P EMP SEN JC92 01363A 1 17 PBA SUB PTL JC92 01361A 1 18 5 JC92 01359A 1 19 A S MATERAL PICKUP CST JC81 00428A 1 Samsung Electronics Service available X Service not available 5 23 Exploded Views and Parts List 5 11 Drive Ass y Exploded View amp Parts List 5 24 Samsung Electronics Exploded Views and Parts List Drive
15. IO Chipselect 0 4 4 mA nlOCS2 ToneOut orl Chipselect 2 ToneOut nlocs3iButtersel O lO Chipselect 2 BufferSel 66 nSELECTIN e Select Input PHIL ST nFAULT H Fault for Error Condition 8 mA Cel o SELECT Parallel Port Select 8 mA BUSY Paralel Port Busy 8 mA Pe ee ane Parallel Port Data Port Data RI EI Ri e 2 4 22 Parallel Port Data PHBTTB 8 mA pw s 8 Uart 1 Rx Data PHIL ST Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization CIRCUIT DESCRIPTION nDMACK1 TxD2 fo H DMA Ackt Uart 2 TxD PHOB4 4 mA niocsi niocss o wocsisomamics ww nDREQO __ ___ DMA Regesto Input Port PHIL ST nDMACKO fo Ack1 Out Port PHOB4 4 mA o DMAWoOcS OutPot EIRQO ai o External interrupt 0 PHILU50 ST nna Pot Rane Gre i1 wm wr ome oa Pon in San a ma fe ww w POS we w Pamo PROB a ma 112 nEPRDY RxDO F ower Weady PHIL ST Uart 0 Rx Data Command Busy 113 nCBSY TxDO H PHOB4 4 mA Uart 0 Tx Data Tis
16. RI 217 3 611101 93 S 3S TONE_CTLI 3 E ar 297742 T 21 4 C221 00nF 8 z 6262 9233 C206 RINGO FE c235_L KEYCLICK i GND Z R213 1 Toone T ink 921 0189 moane 16 vag Eom Om EXE M DEND 18 DGND A 024 31 gt cass 1 14 15 12 1 5 2 4 Reso 68 5 X Sl 2b DTR ab Hb ROS C269 64 1007F 9285 m E SSS NZD HO _ 1 R225 545 g 3 2 3 san AC2 6 Bee d 7 1 M CNTRL SIN vec U44 _ Fl non FM336R6719 12 SLEEP 56 1A SLEEP 046 3 8477 ANODEN_CS 22 405380 DYECLK IE 1 4 N 9 0 D wo BR TRIPS be n D S EL 8224 C248 15 RIEZ A AIC RDCLK S l C268 R234 542 100nF 2 E 72 100nF 120K lt 5 3 11 D 4 POR 18 232 RESET 2 28 2 222 TXAT MODEM TXA1 m _ DGND R216 19 3E 11 10k 19234 225 amp n oC S cer per nMODEM_RST 5 xTALI MAVSS2 50242 10 V MC1405 380 5 t5 XTALO MAVSS1 3 3VM 16V 100nF 13 22 B Nun RE 8222 E Bey vss2 PLL VDD S 145 C241 R223 D ND AN REMOTE E 553 Loo C181 4C190 12 100nF DGND S8 4 PLL_GND 10uF 2 e ada 555 100nF 16v D 50 1
17. 708 5 7 Fl a 20501 CON03 24 0103 R519 Ut 100V 100 Seg ge 24 R512 MGR1 2W 12MF C504 R511 R516 6502 R507 333 1W3 MGR1 2W 50K 222 12 7407 22K l R509 R510 8503 gs C501 U101 B 47 430 10 T 4 AA d DEV 4 TT a0 Repair Manual Samsung Electronics This Document not be used without Samsung s authorization CIRCUIT DESCRIPTION 3 5 7 6 THV THV THV Output Unit Transfer output unit is the transfer output control signal PWM LOW When THV PWM LOW signal is received Q203 turns on and the steady voltage will be accepted to the non inverting ter minal of OP AMP 324 As the voltage is higher than the inverting reference voltage of OP AMP OP AMP output turns high The 24V power adjusts the electric potential to 20201 and 20202 sends IB to TRANS auxiliary wire through current restricting resistance R215 R212 and C204 and eventually Q204 will turn on When the current is accepted to Q402 Ic increases to the current proportional to time through the T201 primary coil and when it reaches the Hfe limit of Q204 it will not retain the on state but will turn to As Q402 turns off TRANS 1 will have counter electromotive force dis charge energy to the secondary coil sends current to the load and outputs THV voltage through the high voltage output enable wh
18. FAST SRAM 1Mbit MOTOR PORT Motor CNTR DMA I F DRIVER 33 6Kbps CCD VF PART CENTRONICS CABLE Samsung Electronics USB CABLE M DEV H SUPPLY V BLADE SMPS HVPS 5V 24V 12V 24Vs Fuser MOTOR 1 MOTOR 2 LSU THE RMISTOR FAN DEV_ID TONER_TX TONER_RX PTL 2P X 2EA SOLENOID PICK_UP DUPLEX MP 6P X X 1EA PAPER SENSOR FEED P EMP EXIT MP BIN FULL COVER OPEN S W 24 45V TRANSFORMER 600 600 TX RX LINE INTERFACE MODEM amp EXT PHONE PAPER ATING PART EXTER NAL PHONE INTE RFACE PART Only SCX 5312F EXTERNAL PHONE Only SCX 5312F 6 1 Connection Diagrams 7 Connection Diagrams 110V for USA 220V for EU a ea AC I DET ECT 1 N LET SENSOR ONLY SCX 5312F ume vos one _ Power i SENSOR ev Normal Connector H SPK 1 SWITCH I CN14 Board tyoe Connector NG RS 2 i 1 a CCD MODULE FLAT 151014 H1 MTRI
19. 5 7 Remove the connector from the Platen Ass y 10 Pull the OPE Ass y and unplug the one connector 8 Open the ADF Ass y in the direction of arrow Pull the ADF Ass y upward and remove it 1 Remove the five screws securing the Platen Ass y Samsung Electronics 3 3 Disassembly Reassembly 12 Unlatch the Scan Upper Ass y securing the 14 Remove the four screws and Channel Base glass and remove it Frame Channel Base Frame Notice When foreign material enters into the Scan Assy it may cause problems in product performance and deteriorate scan image Therefore you should always dismantle or assemble it at a clean place 13 Remove the two scews and pull the Dummy 15 Remove the five screws and Dummy Scan Upper Ass y Lower Dummy Upper Ass y Sh Cover Dummy Lower Cover Scan Lower Samsung Electronics 16 Remove the CCD cable Disassembly and Reassembly 18 Remove three screws and take out the Motor Bracket 17 Pull up the Shaft CCD and take out the Scanner Module Samsung Electronics Shaft CCD 19 Remove the OPE Harness from the Platen PBA Remove two screws and take out the Platen PBA OPE Harness 3 5 Disassembly and Reassembly 3 4 ADF 55 1 Before you remove the ADF Ass y you should 4 Pull the ADF Ass y upward and remove it remove Rear Cover see page 3 1
20. 8 18 10d vaz x 8 1 HSV14 vaz x 8 1 HSV14 ayze dn yoeg 4 ATLES XIS Wid X 138 SOd YOSNAS YOLOW 3QV YOLOW 114 gns a dst dS 021 WOOIIN Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization CONNECTION DIAGRAM 2 Connection Diagram 110V for USA 220 for EU DETECT N LET PENIS ADF m MOTOR ONLY SCX 5312F ros ull 5 SENSOR 13 GND5 AREAS Normal Connector SWITCH CN14 Board on tyoe Connector 2 zzi 9 CCD MODULE FLAT MTR1 1 1 18 1 1 1 0 1 A 1 MOTOR 1 CON4 CON2 16 7 AW 18 CCD TG THERMI ST OR LSU 1 01684 19 00 5
21. Quality Text Photo Mixed Mono Copy Speed Platen SDMP 12 cpm ADF SDMP 12 ADF MDSP Text mixed Approx 7 cpm Photo Approx 3 cpm Optical Resolution H x V 600 X 600 Multi Copy 99 pages Maximum Original Size Legal Maximum Page Size Legal Paper Type Selection Plain Legal Cardstock Transparency Zoom Range Platen 25 400 1 Step ADF 25 100 1 Step NOTE 1 Speed claims based on the test chart Letter size SDMP Single Document Multiple Printout MDSP Multiple Document Single Printout Samsung Electronics 2 3 Specification 2 6 Telephone Specification SCX 5312F Only Item Description 1 Touch Dial 40EA 1 20 shift key 21 40 Speed Dial 80EA Tone Pulse Tone only user modeTone Pulse selectable in tech mode 2 7 Consumables Item Description Type Separate type Toner Cartridge Drum Cartridge Life Toner Cartridge 6 000 sheets 5 coverage pattern simplex normal mode Drum Cartridge 15 000 sheets simplex normal mode 2 4 Samsung Electronics Disassembly and Reassembly 3 Disassembly and Reassembly 3 1 General Precautions on Disassembly When you disassemble and reassemble components you must use extreme caution The close proximity of cables to moving parts makes proper routing a must If components are removed any cables disturbed by
22. 11 reno pe RX CTL 187 12 0253 6222 C224 160nF 1007F OGND 1 0806 c178 28 224 2 DGND flor RISA 100 lt J MODEM RX ES COMPANY NAME i 10 F F 0 L Y Irawn Py Address F jacho i1 City Red CHK THLE Sige DOC CTRL CHK CKINLEY_V2 4 ENGR CHK ODEM 4 AFE h te Ch Tine Ch A CHK REV ing N Chenged bu cheng fugust 27 2001 920784080 EY Urswing Number Shaete ef 14 1 3 4 5 7 8 Samsung Electronics This Document can not be used without Samsung s authorization Repair Manual 3 SCHEMATIC DIAGRAMS Main Circuit Diagram 10 14 1 2 3 4 5 7 8 n vec vec 033 126 20 1g MM74HCT273WM DC8 7 A e RI 20 nRESET enr 1 28 21 2117 060 175 16 jue lt _ ab gt MAIN SOL B4 nOUTBIN_FULL 12 5 5 14 33 R146 s A4 4 lt 1 OPEN 8 6 5113 03 a2 C7 DUPLEX SOL qe _ 12 2 1304 a38 gt MP SOL ag 87 e nTONER RX 1455 3 7 lt 17106 05 15 e PIL ne 18
23. 24V8 vec 06 257 gt 24ve 25 281216 042 3 3 Mu t 01 6232 105 103 880 04 6232 106 103 800 Miis COVER_OPEN DEND vet 2252 0283 1 2K 1 Xo eno E 24 CN27 1 Ie 35303 0250 1 ngs 1 gt TMS vee 1 A003 1 8 8162 922 10K 5244 24 RIGA MATN_SOL gt A 2 B IR se 7 PICK UP_SOL ur gt TCK 800 Bec ur ANM HYPER RXD Cj 54 4 S as 23 1 045 024 2498 24191 1 012 vec Keer ty 8250 MP_SOL lt C281 1nF 016 L _ 256281256 TA SLEEP D 2 6317 11 im 1810690 COMPANY n i cho i10 City F TIE 56 MCKINLEY V2 4 ENGR THERM amp SOL henge gb u e s nene asc 21 2001 Urewing Nunber Sheet 12 of 14 d Zz 3 4 5 6 7 8 Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization SCHEMATIC DIAGRAMS Main Circuit Diagram 14 14 1 2 3 4 5 6 7 8 240 42498
24. 5 B 8 8 H oc p ERE 8 V S wait 60 ns FPM 5Mhz nOE nWE MCLK addr i Mif Trp DRAMD 3 2 5 2 fpm DRAM write timing CIRCUIT DESCRIPTION Repair Manual CIRCUIT DESCRIPTION 3 2 5 3 EDO DRAM read timing Basically the Extended Data Out DRAM is similar to Fast Page Mode DRAM For FPM the data are valid only when the nCAS is active while reading the internal data however it has a latch that the data will be continuously outputted even after the nCAS is inactivated While configuring the software you must set the timing register of SFR considering the clock speed and the DRAM spec wait lt EDO Read Timing Diagram Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization Samsung Electronics lt FPM Write Timing Diagram gt lt SFR Values Example for FPM gt This Document can not be used without Samsung s authorization 3 2 5 4 edo DRAM write timing CIRCUIT DESCRIPTION Repair Manual CIRCUIT DESCRIPTION 3 2 6 FS781 FREQUENCY ATTENUATOR This system used FS781 for the main clock for SUPPRESSION It spreads the source clock in a consistent bandwidth to disperse the energy gathered in order to attenuate the energy The capacitor value of the loop filter PIN 4 is set depending on the sour
25. 54 0 22UF 16V U2 4 2 3 82107 203 4 3 I 24 7 1 s 2 ae IN MODEM TxAZ TP UPS 5v 2 LCA19G VAR2 PC814 zx 1 52 VRG1BTP 5 2 88nF D Lg 013 R1 e D 7 VERUM 48951016 oe ese T T 7 aig ELDP PRA 05 ED INS R20 914 ED ic 54 L nia MTZ4 78 10K i E GND5 41K 1 15 Ans oP CNDS 777 AGND 2 3 T cele E Df Ke gt RING 4 8 3 MTZ4 7B B 11414 82 41 SJ3030k lt gt 14 E 2 5 2 205 GNDS 4 0 12V us bere pem amp 15nF 400V ATA 14 5 1 MODEM_RX GNDS REMOT 3 MODEM TxA REIS 12V WEBER ER 12 CN2 E A 12 623PCB6 BCBIO T 35303 1450 5 2002 Nolte PEZ E i zeit Ufa SS tho i COMPANY NAME F NM 18 le C11 gt DP iby Address eae eee an Choi ER TI 74 gt RECALL Rall CHE TITLE Sue CML1 gt E ES CNDS BND1 arog Mek intey EU LIU_v0 2 GNDS dou 10 2001 a8 OF CHK REY Brewing Nunber Sheet 1 of 1 1 2 3 4 5 5 7 Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization SCHEMATIC DIAGRAMS 4 3 OPE Circu
26. 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 NIS Private Mp mes Ag JB81 00039A AS USE ASS Y Pan JB75 00068A MEC CHUTE ASS Part p PBA e 892 011314 PBA MAIN CONTROLLER ASS Pan MEA JB97 01089A MEA UNIT PULLEY IDLE Samsung Electronics 5 1 Exploded Views and Parts List 5 1 Main Exploded View amp Parts List 52 1 I 524 52 3 52 2 DR SCX 5112 SCX 5312F 5 2 Samsung Electronics Main Parts List Exploded Views and Parts List Service Available NO DESCRIPTION SEC CODE Q TY SA REMARK 1 SCANNER ASS Y FRO refer to the table 1 1 1 HOU ADF ASS Y JC81 00429A 1 O 1 2 ELA HOU PLATEN ASS Y refer to the table 1 O 1 3 PMO COVER OPEN JC72 00737A 1 O 1 4 PMO COVER SIDE L JC72 00739A 1 O 1 5 PMO COVER SIDE R JC72 00740A 1 O 1 6 PMO GUIDE PAPER JB72 00843A 2 O 2 MEA UNIT COVE
27. DGNO 16 Lf INSTPAR PHA 5213 nd tk 019 91024 E Y 11 E R19 m 150 5 E DF 11 160 205 24y 5V id AIT a nd 15 sensor xX iras CONF IDENTIAL ED DATE 1 Friday April 27 2001 SAMSUNG ELECTRONICS 4010 ce pono SIGN F TUR 1000F Japy 100nF cND24 DND thangad by ARP TITLE Size F sis MCKINLEY ADF V1 1 T 7 GND24 DRU Rev 1 9 Drawing Number MOTOR SENSOR BLOCK Page 1 2 3 4 5 6 7 8 Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization SCHEMATIC DIAGRAMS 4 7 Flat Circuit Diagram 2 3 4 5 7 8 A A 24V vec CN1 1 24V 1 8 2 CN2 1 B 1 l 2 2 p o 16 4 1 JADFM_IACO 5 8 JADFM_IAC1 gt SCAN_ADF_PHA a lt I SCAN ADF PHB gt ADFM_IACO J ADFM_IB 0 s gt ADFM_TAC1 _18 1 3 gt SCAN ADF PHB L2 gt MODULE DETECT L8 gt ADFM IBCOS gt gt A
28. Samsung Electronics Exploded Views and Parts List SCX 5312F XEC DESCRIPTION SEC CODE SCX 5112 XEC AS SCANNER ASS Y FRU JC81 00691E DESCRIPTION SEC CODE AS PLATEN ASS Y FRU JC81 00690C AS OPE COVER 55 Y FRU JC81 00689C AS SCANNER ASS Y FRU AS PLATEN ASS Y FRU JC81 00742E JC81 00745E PMO COVER OPE C JC72 00796E AS OPE COVER ASS Y FRU JC81 00748E PMO COVER OPE C JC72 00944E PCT ONETOUCH PAPER JC72 00872E PCT LCD WINDOW JC72 00870E PMO COVER DUMMY OPE M JC72 00858E PBA SUB LIU JC92 01355E SCX 5312F XET DESCRIPTION SEC CODE AS SCANNER ASS Y FRU JC81 00691D PCT LCD WINDOW JC72 00945E SCX 5112 XET DESCRIPTION SEC CODE AS PLATEN ASS Y FRU JC81 00690D AS SCANNER ASS Y FRU JC81 00742D AS OPE COVER 55 Y FRU JC81 00689D AS PLATEN ASS Y FRU JC81 00745D PMO COVER OPE C JC72 00796F AS OPE COVER 55 Y FRU JC81 00748D PCT ONETOUCH PAPER JC72 00872F PMO COVER OPE C JC72 00944F PCT LCD WINDOW JC72 00945F PCT LCD WINDOW JC72 00870F PMO COVER DUMMY OPE M JC72 00858F PBA SUB LIU JC92 01355E SCX 5312F XIL SCX 5112 XIL DESCRIPTION SEC CODE AS SCANNER ASS Y FRU JC81 00691F DESCRIPTION SEC CODE AS PLATEN ASS Y FRU JC81 0069
29. 1 2 5 SPRING ETC COIL ADF 1 2 6 SHEET ADF I 1 X 3 AS ADF LOWER ASS Y FRU JC81 00434A 1 3 1 SPRING ETC TORSION DOC CC2 F JB61 00076A 3 O 3 2 RING C 6044 000159 4 3 3 GEAR ADF 38 JB66 00103A 1 3 4 PMO BUSH JB72 00819A 2 O 3 5 MEC ROLLER DRIVER JC75 00149A 1 3 6 PMO COVER ADF LOWER JC72 00735A 1 3 7 PMO ACTUATOR SENSOR DOC JB72 00837A 1 3 8 PMO ACTUATOR SENSOR JC72 00747A 1 3 9 MEC ROLLER EXIT JC75 00150A 1 3 10 PMO BUSHING HOLDER JG72 40732A 1 Service available Service not available 5 10 Samsung Electronics ADF Ass y Parts List Cont Exploded Views and Parts List Service Available NO DESCRIPTION SEC CODE Q TY SA REMARK 3 11 SPRING ETC CLUTCH JC61 00062A 1 3 12 23 JC66 00323A 1 3 13 SPRING ETC WHITE JC61 00548A 2 3 14 IPR BRKT WHITE BAR JC70 00225A 1 3 15 PPR WHITE SHEET JC72 00752A 1 3 16 D SUB CBL ADF_MAIN JC39 00190A 1 3 17 5 SUB ADF FRU JC81 00437A 1 3 18 PBA SUB ADF POSSEN JC92 01365A 1 3 19 PBA SUB ADF DET SEN JC92 01366A 1 3 20 HARNESS ADF ROLLER GND JC39 00187A 1 3 21 HARNESS DRIVER GND JB39 00065A 1 3 22 PMO ACTUATOR SENSOR SCAN JC72 00746A 1 3 23 NPR SPRING GND 1 4 AS ADF MOTOR AS FRU JC81 00435A 1 4 1 GEAR CLUTCH 29 1 X 4 2 IPR BRKT ADF MOTOR 1 4 3 PMO
30. 47 mm 1 2 Replace toner cartridge 3 Replace transfer roller Different image den sity left and right Digita Digita Digita Digita Digita 1 Charge roller s pressure force unbalance 2 Dev roller and OPC or Dev roller and blade s pressure force unbalance 3 Transfer roller s pressure force unbalance of each side 1 2 Change toner cartridge 3 Check left and right spring of transfer roller and the spring pressing the developer inside the machine Horizonral band Digital Printer Digital Printer Digital Print piuital Printer 1 Unstable high voltage contact 2 Charge rollers contamination 3 Contamination of heat roller 4 Malfunction of LSU 1 Clean each contact and check good con tact 2 Clean charge roller 3 Replace fuser unit 4 Check Main PBA Abnormal Image Printing and Defective Roller If abnormal image prints periodically check the parts shown below NO Roller Abnormal image period Kind of abnormal image 1 OPC Drum 94 3 mm White spot Black spot 2 Charge Roller 37 7 mm White spot Black spot 3 Supply Roller 35 8 mm Horizontal dark band 4 Develope Roller 44 8 mm Horizontal dark band 5 Transfer Roller 57 8mm Black side contamination transfer fault 6 Heat Roller 82 5 mm Black spot White spot 7 Pressure Roller 69 1 mm Black side contamination 4 20 Samsung Electronics Image No
31. B 0 B 1 MTRI I A 0 MTRI I A 1 4 CON2 EN vez 10 684 g Z A 9 1 1 1 1 1 1 1 15 2 A 0 10CCD CLK1 0 MOTOR 2 16 MrR2 C 5 5 HVPS 5 i 7 MTR2 0 112 CCD CLK2 FLAT i zl i Be MIRAJ BUD Y 113 GND5 10 ADF 0 0 114 000 RS 2 44 ADF_ B 1 DUPLEX S 15605 21436587 109 12111413 1615181720 19222124 23 1 12 MOULE OL 2 Control 21436587 109 121114 13 1615 18 1720 19222124 23 Msi FRADE E DE 42 44 O 65 117 GND5 i 1 14 ADF P d 7 LSUCLK TDS 225v 3065 225 5605 GN 701007 1 18CND12 MAD 2 24 3 5 4 6454 60505 7 115 ADF PREGI 18 nLREADY 18 4127 9 00 10424V 11 GND24 12 424V 13 GND 1 119 VOUT_R 8 ADFIA 0 9 ADEIB 0 10 11 MODULE DEEG 12 AF R 1 16 0g 4 ID 19 PMOTOR 114 24V 15 THV PWM 16 24 51 17 18 424VS1 120 VOUT_G 113 ADEP POS 14 15 16 ADEP 17 CPE RXD t L a 49 THREAD 20 FUSERON 21 MHVPWM 22 SPK 23 DEVPWM 121 VOUT B 18 RST 19 0PE 2 FLALOOER 21 22 TMNA 23 TM B 1 12345678 910 11121314 15 16 17 18 1920 21 22 23
32. CTR21 Terminal IMPEDANCE 270 750W 150nF 3 7 4 DIALER PART DIAL DTMF Dialing is controlled by MODEM and should be selected by appropriate LEVEL and On off Time output based on each countries own National specification Tolerance 1 5 High Group 1209 1336 1477 1633Hz Low Group 697 770 852 941 Hz U S Usage 21 High Freq Level 9 0 2 0 2 5 7 0 1 0 2 0 Low Freq Level 9 0 1 0 2 0 11 0 2 5 2 0 DP DIAL Controls from MAIN through DP Terminal for U S Usage set time to DF signal of 40 60 DP signal is made of U6 pcb817 The DC current which flows thru Q2 Base is regulated by On Off switch and turns to DP dial signal with a COUPLER 21 does not have telephone capability but has the number 3 and 4 Line Connection No DP condition but possibility to get approval only on DTMF Dial based terminal Samsung Electronics This Document can not be used without Samsung s authorization CIRCUIT DESCRIPTION 3 7 5 RING DETECTION PART RING SIGNALS from the LINE section TIP RING are further passed through C5 R3 ZD1 and ZD2 and ends up at U9 PC 814 U9 then detects above RING SIGNAL and passes the output to MAIN B D The wilre diagram s C5 is RINGER CAPAC ITOR and it normally uses 1UF 250V A R3 limits AC current and controls upper and lower REN meter 3 8 SMPS Switching Mode Power Supply Unit
33. Reassembly 3 18 Main PBA 1 Before you remove the Main PBA you should 3 Remove the five screws and take out the main remove PBA from the Shield Main Lower Rear Cover see page 3 1 Side Cover Ass y see page 3 9 Cover Paper Exit Ass y see page 3 12 SMPS see page 3 14 Main PBA e 2 Remove the two screws and take out the Shield Main Lower 4 Remove the one screw and unlatch the LIU PBA Shield Main Lower securing the main PBA and remove it _ LIU PBA Only SCX 5312F d _ Main PBA Samsung Electronics 3 21 Troubleshooting 4 Maintenance amp Troubleshooting In this chapter it was mentioned about the functions for maintaining the product how to find the causes of the inferiority and troubleshooting method The service manual is bound the SCX 5312F and SCW 5112 together in one volume SCX 5312F has functions such as printer copy scanner and fax The SCX 5112 has all functions as the SCX 5312F but the fax function The contents of the manual are standardized for the SCX 5312F The information about the fax function is not applied for the SCX 5112 The differences by each model are explained in a separate way 4 1 Preventative Maintenance The cycle period outlined below is a general guideline for maintenance The example list is for an average usage of 50 transmitted and received documents per day Environmental conditions and actual
34. 1 5 IPR TERMINAL GND 1 X 6 IPR TERMINAL DEVE KEY 2 7 CBF HARNESS DEV ID 1 8 CBF HARNESS BLADE SUPPLY DEV i 5 X 9 CBF HARNESS THV WIRE 1 10 CBF HARNESS MHV WIRE 1 11 1 12 PMO LENS TONER SENSOR 2 13 IPR GND EXIT 1 14 IPR GND OPC 1 X 15 IPR GND OPC BASE 1 16 IPR GND FUSER 1 X 17 IPR GUARD C O S W 1 18 IPR GND TERMINAL 1 X 19 CBF HARNESS AC WIRE 1 20 AS SWITCH MICRO FRU JC81 00438A 1 21 CBF HARNESS EARTH TX MOTOR 1 22 PBA SUB EXIT SENSOR JC92 01364A 1 23 PBA SUB TONER_RX JC92 01360A 1 24 GEAR EXIT U ID i 3 X 25 GEAR EXIT IDLE Z17 t 2 X 26 CBF HARNESS THERMISTOR JOINT JC39 00164A 1 O 27 PMO HOUSING TERMINAL 1 28 IPR TERMINAL FU 2 29 JC72 00463A 1 30 CONNECTOR 0 JC72 00465A 1 31 ELA HOU MOTOR GND 1 32 SPRING CLUTCH 2 33 RING CS 5 Samsung Electronics Service available X Service not available 5 27 Exploded Views and Parts List 5 13 FuserAss y Exploded View amp Parts List 5 28 Samsung Electronics FuserAss y Parts List Exploded Views and Parts List Service Available NO DESCRIPTION SEC CODE Q TY SA REMARK 0 ELA HOU FUSER 110V ASS Y JC96 02194A 1 110V ELA HOU FUSER 22
35. 8 mA 6 10 Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization CIRCUIT DESCRIPTION 3 2 4 PROGRAM ROM FLASH MEMORY CONTROL 1 DEVICE TYPE NO 29 800 4 MBYTE 512K 16815 4 2 PROGRAMMING BEFORE 557 EPROM PROGRAMMER PROGRAMMING at factory AFTER ASSY DOWNLOAD from PC 3 OPERATING PRINCIPLE When the RCSO ROM CHIP SELECT signal is activated from the CPU after the POWER is ON it activates RD SIGNAL and reads the DATA HIGH LOW stored in the FLASH MEMORY to control the overall system The FLASH MEMORY may also write When turning the power on press and hold the key power switch for 2 3 seconds then the LED will scroll and the PROGRAM DOWNLOAD MODE will be activated In this mode you can download the pro gram through the parallel port Write Timing Diagram for Two Beat Burst Cycle Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization CIRCUIT DESCRIPTION 3 2 5 DRAM CONTROL 1 DEVICE TYPE NO K4E6411D EDO TYPE 4MBYTES 1M 16BITS 2 2 OPERATING PRINCIPLE DRAM can either read or write The data can be stored in the DRAM only when the power is on It stores data white the CPU processes
36. CANNOT BE ENGAGED above Check the control signals of CN20 11 Check transmission path Check output of CN20 3 4 T2 4 LIU PBA Check reception path Check output CN1 1 LIU PBA and input of CN20 1 main PBA Replace defective parts Replace LIU if low Refer to TEL LINE CANNOT BE ENGAGED above Replace main PBA if the signals of CN8 11 MAIN PBA is low Replace main PBA if abnormal Replace LIU PBA if CN1 1 LIU PBA is not confirmed Replace main PBA if CN20 1 MAIN PBA is not confirmed Defective automatic fax reception s the ring checked Check ring pattern at CN1 9 LIU PBA Refer to Defective Transmission Replace LIU if it cannot be checked Refer to Defective Transmission Samsung Electronics 4 17 Troubleshooting 4 6 3 Print Quality Error Status Check Solution Vertical black line and band Digital Anter Digital Anter Digital Anter Digital Anter Digital Anter 1 2 Bad blade of Toner cartridge LSU 1 Change Toner cartridge 2 Replace LSU Vertical white line L igita Printer L igita Printer L igita Printer L igita Printer L igita Printer LSU window contamination Toner cartridge 1 Clean LSU window 2 If not LSU change Toner cartridge No image 1 Seal tape is removed 1 Removing seal tipe 2 GND OPC
37. Comm I F LRAN12968 INTERFACE IC E CXRAM 2568 UNICON RAM 5128 RAM 5128 5128 lt Block Diagram gt Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization CIRCUIT DESCRIPTION 3 2 Circuit Operation 3 2 1 CLOCK 1 System Clock Device Oscillator Frequency 20MHz KS32C61200 RISC PROCESSOR drives PLL internally and uses 60MHz 2 Video Clock Device Oscillator Frequency 45 3928 MHz Fvd PAPER 1SCAN LINE sending time SCAN effective late 1SCAN LINE DOT 4 600dpi 600dpi 58 208mm s 216mm 4 25 4mm 25 4mm 76 1 28 697MHz PAPER 1SCAN LINE sending time SCAN LINE interval DOCUMENT SPEED 58 208mm S 1 SCAN LINE DOT MAZ SCAN distance 216mm DOT per 1mm 3 USB Clock Device Oscillator Frequency 48MHz 3 2 2 POWER ON OFF RESET 1 Signal Operation Input Signal 5V Power Line VCC Output Signal KS32C61200 nRESET 29F800B nRESET POWER ON OFF DETECT VCC RISING FALLING 4 5 4 6V RESET TIME Td 1 48 1 52ms Td Ct V sensing charge 5 100 2 TIMING CHART Vcc and SENSE Threahold Voltage 3 6V RESET ts i Output Output Undefined Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization CIRCUIT DESCRIPTION 3 2 3 RISC MICROPROCESSOR
38. If the problems not solved even after the cable replaced check the amount of the remaining tone 2 Check if the connection between PC and printer port is proper If you use windows check if the printer driver 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 func tion 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 3 If the scanner needs to be connected to the printer first the remove the scanner from the PC to see if the printer is prop erly working alone 4 6 6 2 The printer is not working 2 Description After receiving the printing order no response at all or the low speed of printing occurs due to wrong setup of the environment rather than malfunction of the printer itself Check and Cause Solution 1 Secure more space of the hard disk 2 Printing error occurs even if there is enough space in the hard disk 3 Check the parallel port related items in the CMOS Setup 4 Reboot the system to print 1 Not working with the messa
39. Precautions 1 5 Tools for Troubleshooting The following tools are recommended for safe and smooth troubleshooting described in this service manual 1 DVM Digital Volt Meter 3 Driver Standard Indicates more than 3 digits Standard type type long short M2 long M2 short 4 Pinset Standard For general home use small type 2 Electronic Scale 5 Cotton Swab Standard Equipment to check the weight of consum Standard For general home use for medical service ables toner cartridge supplied by Samsung Electron ics The gram unit can be measured 6 Cleaning Equipments IPA Isopropyl Alcohol dry cloth soft stuff neutral detergent 7 Software Driver installation CD ROM Note Mind your hands not to be touched when you disassemble and reassemble PBA ASS Y such as the main board SMPS HVPS Samsung Electronics 1 3 Specification 2 Specification Specifications are correct at the time of printing Product specifications are subject to change without notice See below for product specifications 2 1 General Specifications Item Description Type of Unit Desktop Operation System Win95 98 ME NT 2000 XP Duplex Printing Yes Default Interface IEEE1284 Nibbel ECP USB without HUB mode CPU 66 MHz KS32C61200 Emulation PCL6 Warming up Time 41
40. WITCHIN REGULATION PWM MHV CIRCUIT CONTROL UNIT CONTROL UNIT OPC FEEDBACK lt Output unit Block Diagram gt BIAS PWM BLADE PWM REGULATION SWITCHING CONTROL UNIT CONTROL UNIT CIRCUIT SUPPLY FEEDBACK DEV lt BIAS Output Unit Block Diagram gt Repair Manual 29 Samsung Electronics This Document can not be used without Samsung s authorization CIRCUIT DESCRIPTION 3 5 7 4 MHV Electrification Output Enable Electrification Output Enable is the electrification output control signal PWM LOW ACTIVE When MHV PWM LOW signal is received Q401 turns on and the steady voltage will be accepted to the non inverting ter minal of OP AMP 324 As the voltage higher than the inverting reference voltage of OP AMP which is set to R405 and R406 OP AMP output turns high This output sends IB to the TRANS auxiliary wire through current restricting resis tance Q402 via R408 and C403 and Q402 turns on When the current is accepted to Q402 Ic increases to the current pro portional to time through the T401 primary coil and when it reaches the Hfe limit of Q402 it will not retain the on state but willtum to off As Q402 turns off TRANS 1 will have counter electromotive force discharge energy to the sec ondary unit sends current to the load and outputs voltage through the high voltage output enable which is com prised of Regulation circuit T401 M
41. White Black spot Digital Printer Digital Printer Digital Printer Digital Printer Bigital Printer Light or dark black dots on the image occur periodically White spots occur in the image periodi cally 1 If light or dark periodical black dots occur this is because the developer rollers are contami nated with foreign substance or paper particles 1 37 7mm interval Charged roller 2 94 3mm interval OPC cycle 2 If white spots occur in a black image at intervals of 94 29mm or black spots occur elsewhere the OPC drum is damaged or foreign substance is stuck to the surface 3 black and white or graphic image is partially broken at irregu lar intervals the transfer roller s life has been expired or the trans fer voltage is abnormal 1 case of 1 above Run OPC Cleaning Mode Print 4 5 times repeatedly to remove Especially check foreign substance on the OPC surface then remove them with a clean gauze moistened with IPA Isopropyl Alcohol not to damage OPC if necessary Caution Never use usual alcohol 2 In case of 2 If they are not disappeared by running OPC Cleaning Mode Print 4 5 times at intervals of 94 3mm Replace the developer at intervals of 37 7mm Remove foreign substance Clean the Charged Roller Broken image Replace the developer according to carelessness 3 In case of 3 Exchange the transfer roller because the life of t
42. index value will also be different according to the index value read by CPU the transfer voltage output will differ according to the preset transfer table The changes in transfer output required by each load is controlled by PWM DUTY Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization CIRCUIT DESCRIPTION 3 6 OPE PBA 3 6 1 SUMMARY OPE Board is separated functionally from the main board and operated by the micom Z8601 in the board OPE and the main use UART universal asynchronous receiver transmitter channel to exchange information OPE reset can be controlled by the main OPE micom controls key scanning and LCD and LED display If there occurs an event in OPE such as key touch it sends specific codes to the main to respond to the situation and the main analyzes these codes and operates the system For example it the main is to display messages in OPE the main transmits data through UART line to OPE according to the designated format and OPE displays this on LCD LED OPE s sensing is also transmitted to the main through UART line and then the main drives necessary operation OPE consists of U1 MICOM Z8601 LCD key matrix LED indicators Refer to OPE Schematic Diagram and Wiring Diagram sections of this manual Signals from the key matrix are delivered to U1 input pin group 01 06 U1 pin 48 TX DATA is the UART code sent to MAIN PBA Display
43. or other safety hazards 1 2 Precautions on Disassembly and Reassembly Very careful precautions should be taken when replacing parts Before replacing please check cables because you cannot put the cables that you removed for replacing parts into the proper place if you would not make sure of where they were con nected and in which condition Please do the following before disassembling for a repair or replacement of parts 1 Pull out paper cassette printer cartridge installed Especially careful not to be scratched by the surface of developer or not to expose them to light 2 Turn the power switch off 3 Take out the power plug printer cable from the printer 4 Use only the same type of part as original when replacing parts Samsung Electronics 5 Do not force to open or fasten plastic material components 6 Becareful that small parts such as screws should not get in the printer 7 When disassembling assembling also observe small components are located in place 8 If you uncover and turn the machine over to replace some parts toner or paper particles may contaminate the LSU window Protect the LSU window with clean paper Releasing Plastic Latches Many of 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 1 1 Precautions 1 3 ESD Precautions Ce
44. 1 5151048 L10 INSTPAR CCD REF Le Le Le 9 2 TK15420MTL US71 TK15420MTL CLK DP F PHA PHB LAMP VOLO VOLI 012 AN ADE ADF_1BC19 nSPK CTL RIC_DATA SCAN 4D FLAT COVER nWR_FLASH nMODEM RST c SCAN_ADF SCAN_ADF_13 0 SCAN ng near agnos 16 Wem ____ Lachey TITLE gen V2 4 hanged PU hanged 0110 Monda August 27 2001 a e mmm a ee e Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization SCHEMATIC DIAGRAMS Main Circuit Diagram 8 14 CN7 1 7 35303 24 51 061 2 1 741514 14 741514 2352 2 410 3 4 3 7 gt nHSYNC 339 7 eno 1 0 0 18 H3 1nvbo U3 6 1 7487 LSU_CLK we 13 gt nLREADY DGND 14 R INSTPAR 2 p 4 wn os og R44 o 1 E 258 100 6 9083MHz on ov nne _ A y gt LSU_CLK ADF MOT C TL aw CD7 4HC4
45. 10 PMO LOCKER PLATE JC72 41210A 1 11 PRP PAD CST JC73 10910A 2 12 SPRING LOCKER PLATE JG61 70531A 1 13 SPRING PLATE K UP JC61 00455A 2 14 LABEL R INSTRUCTION CST ii 1 X 15 LABEL R HEIGHT CST 1 X 16 PMO IMPACT CASSETTE 1 X Samsung Electronics Service available X Service not available 5 15 Exploded Views and Parts List 5 6 Exit Ass y Exploded View amp Parts List S 47 JSS 5 D 15 5 16 Samsung Electronics Exit Ass y Parts List Exploded Views and Parts List Service Available NO DESCRIPTION SEC CODE Q TY SA REMARK 0 MEC EXIT ASS Y JC97 01643A 1 O 1 PMO GUIDE EXIT UPPER 1 X 2 PMO GUIDE EXIT LOWER ji 1 X 3 PMO GUIDE JAM REMOVE 1 X 4 MEC ROLLER EXIT DRV JC75 00127A 2 5 PMO ROLLER DECURL JC72 00833A 4 6 PMO PULLEY DUPLEX 2 X 7 BELT TIMING GEAR i 1 X 8 GEAR DUPLEX 1 X 9 PMO BEARING LARGE DP i 1 X BLACK 10 PMO BEARING LARGE DP JC72 40978A 3 O 11 IPR GROUND EXIT 1 X 12 ICT SHAFT EXIT LOWER ID 1 X 13 PMO ROLLER_EXIT 4 X 14 SPRING EXIT ROLL FD 2 X 15 PMO HOLDER EXIT ROLL 4 X 16 PMO ROLLER FD F i 4 X 17 PMO ROLLER FD R 4 X 18 SPRING EXIT LOWER IDLE 5 4 X 19 MEC BRUSH ANTISTATIC JC75 00095A 1 20 PBA SUB BIN FULL SENSOR 1 X 21 E RING 3 X 22 PMO LEVER STACKING JC72 00709A 1 Samsung Electronics Service av
46. 2W100KJ 103 22 L1 i IAN B V 26E Ica De 35V100UF ic oranxx C25 D1NL20U 6 35V100uF te 12V R23 c18 1 L2 5 1 4W100J 630V333K by L R17 c28 204 R11 D2 C42 Xm m E 200 1 8W51J 41D 1NL20U MAT 22 C MY50V104 sy1 gt t E BTA12 600B 1 8WA70J 4 4 2 T 1 1008 1270 A Lac R12 13 Y IF R37 1 6W2 2 H 8WAKJ R44 1 2 1 8W120J 1 8W24J 7653 is N e 9 58560 5v R22 S21ME4FY 9 16 1W180J 3 our o cs 5 4721 R9 2 k c 2 5 1 C47 R24 1 8W22KJ 0 4 9 35V33uF 3 tes 1WATJ 2 D8 B dn Tawesos eI SB 72 ewi2o 7 2 626 R2 C MY50V104 1WATJ R11 C sve R10 c14 R16 mIs C15 xL 1waJ 50V102J1 8W680J owe 50V471J PT1 EER3435 1973300 4 24 201 R66 RD1 8WO01 5KJ 1 8W5 6KJ cic ZD 500MW30V ZD 500MWe 2v A 8WAKJ 50V683J R25 202 R31 4 8W10KJ 1 8WA1KJ FUSER_ON R34 1 C212 1 2 we XZ Pc 123 R26 R30 1008 1 8W220J lt 1 8W220J 4 4 431 L R28 aa R35 1 8W680J T 1KJ st MY50V104 J XZ 123 C MY50V104 20 Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization 4 6 ADF Circuit Diagram SCHEMATIC DIAGRAMS
47. 3 8 1 SMPS SPECIFICATIONS The SMPS Switching Mode Power Supply Unit used here is a PWM Pulse Width Modulation type power supply unit that supplies DC 5V to controller and control panel and DC 5V DC 24V and DC 12V to the engine It also supplies AC power to fixer heat lamp No Output Channel Ch 1 Ch 2 Ch 3 1 5 1V 24 0V 12 0V 2 Rated Output Voltage 5 1V 24 0V 12 0V 3 Rate Output Current 2A 2 5A 1 0A 4 Maximum Load Current 3A Continued 3 5A Continued 1 0A Continued and Load Pattern 5 Load Change Range 0 5 2 0A 0 3 2 5A 0 2 1 0A 6 Rate output voltage 5 1 5 24 0V H0 12 5 For rated 4 84 5 35V 21 60 26 40V 11 40 12 60V 7 1 Total Output Voltage Including Including All Including All Deviation 5 1V 5 24 0 10 12 5 Input Load Aging 4 84 5 35V 21 60 26 40V 11 40 12 60V 2 Dynamic Input Change Including Set Error Including Set Error Including Set Error 3 Dynamic Load Change 8 Refer to ripple amp noise 27 150mVp p or less 500mVp p or less 150mVp p or less 9 Refer to load short and Must not ignite or Ouiput voltage must Must not ignite or overload protection 23 generate smoke shutdown withing generate smoke Refer to load short and when output shorted the range of when output shorted overload protection 23 for 5 sec 3 5A 6 5A for 5 sec Samsung Electronics This Document can not b
48. 3KV470pF lt gt SBR306 D GND Y 33K R304 lt R306 Dx v 4 389KF 26 R311 1 R314 100KF 2 17K R305 10KF 24 TEV READ 304 T 500 1032 5K Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization CIRCUIT DESCRIPTION 3 5 7 7 Environment Recognition THV voltage recognizes changes in transfer roller environment and allows the voltage suitable for the environment in order to realize optimum image output The analog input is converted to digital output by the comparator that recognizes the environmental changes of the transfer roller It is to allow the right transfer voltage to perform appropriate environmental response considering the environment and the type of paper depending on this digital output by the programs that can be input to the engine controller ROM This environment recognition setting is organized as follows First set the THV standard voltage Allow 200MQ load to transfer output enable output and set the standard voltage 800V using VR201 Then set 56 CPU s recognition index value as the standard using VR302 This standard value with CPU makes sure that the current feedback is when output voltage is 800V and load is 200MO If the load shows different resistance value when 800V is output the current feedback will also be different and thus the
49. CBF HARNESS SCAN MOTOR JB39 00077A 1 O 2 4 CBF HARNESS MAIN ENGINE JC39 00030A 1 O 2 5 CBF HARNESS DRIVER GND JB39 00065A 1 O 2 6 PBA SUB D SUB JC81 00781A 1 O 2 7 ELA HOU SCAN MOTOR ASS Y JC81 00431A 1 O 2 7 1 MOTOR SCAN b 1 X 2 7 2 GEAR TIMING 5 1 X 2 7 3 RING E 3 X 2 7 4 GEAR REDUCTION i 1 X 2 7 5 PMO HOLDER BELT 5 1 X 2 7 6 GEAR IDLE T 1 X 2 7 7 IPR BRK MOTOR PLATEN 1 X 2 8 CBF HARNESS OPE 1 X 2 9 PMO COVER SCAN LOWER JC72 00757A 1 2 10 IPR CHANNEL FRAME JC70 00239A 1 O 2 11 PMO HOLDER CCD JB72 00759A 1 O 2 12 PMO COVER DUMMY LOWER C JC72 00794A 1 O 2 13 ICT INSERT SHAFT JB70 00154A 1 O 2 14 PMO PULLEY JB72 00763A 1 O 2 15 PMO HOLDER BELT JB72 00764A 1 2 16 RING E 6044 000125 1 O 2 17 ICT SHAFT CCD JC70 00253A 1 O 2 18 PMO LEVER SENSOR JC72 00755A 1 O 2 19 IPR BRK SCAN B D JC70 00228A 1 O 2 20 SPRING ETC EXIT JB61 70939A 1 O 2 21 ELEC MECH SCANNER MODULE JC96 02105A 1 O 2 21 1 AS LAMP CCD JC81 00783A 1 O 2 22 CBF SIGNAL CCD FFC JC39 00188A 1 O Samsung Electronics Service available X Service not available 5 7 Exploded Views and Parts List SCX 5312F OPE NO DESCRIPTION SEC CODE Q TY SA REMARK 3 ELA HOU OPE COVER ASS Y refer to the table 1 3 1 PMO COVER OPE C refer to the table 1 3 2 PCT LCD WINDOW refer to the t
50. COMPANY NAME e hi d b 480 D b jenes dou August 21 2001 165 28788 al ee 45 Repair Manual Samsung Electronics This Document not be used without Samsung s authorization SCHEMATIC DIAGRAMS Main Circuit Diagram 7 14 08 25 281216 LEVEL G lt 07 CCD REF 25 281216 LEVEL 47 09 TA 792 tj DES dd 25 281216 al pF _____ C65 vcc ToF 0 25oF nCIP3 DREQ nC 1P3 CS nORD TX INT rov TI VSSA 08 59 E Sew AD SDCI5 0 GND Foe L _ lt LEVEL_R SRAM AG SRAM AS x 16 31 AB SRAM 5 AB SRAM 48 E SEM AT EM SRAM AL SRAM SRAM AIS SRAM_nUR cno 109 SRAM Da i OOnF T00nF 1 2 AM Sen be Eod TK18420NTL SRAM_D4 SRAM 205 SRAM 06 SRAM_OT SRAM_08 09 SRAM DIB SRAM D11 SRAM DI2 SRAM SRAM DIA SDC15 0 5 SAM DIS C67 JeF 9 25pF REMOVE c81 1 2701
51. DRAMD 24 31 nUSB_DACK nUSB_DREQ nUSB CS nDuR nDRD c97 c95 nUSB INT E RE 23 100nF t00nF cg 8 gt 1 22oF 220 2252 DL 106 oF UNICON vec 1 u23 Ra17 5761048 FST81828 M IN OUT XIN VDD sa 155 GND E 3 4 10 51 FSOUT _ 158 a 2880115 Urewn 80 K hanged by lete Changed jach 110 Monday August 27 2001 10 12 1 122 3s 4 5 17 1 C59 8 8 c229 vec 180nF NC OSCT 566 dauh 45 3928MHz DGND 3 0 Repair Manual 45 Samsung Electronics This Document can not be used without Samsung s authorization SCHEMATIC DIAGRAMS Main Circuit Diagram 6 14 050 MMSD914T1 CN14 19 D 025 3 E ata 4 SUPERI284 ores E i ata ES lato E 21 nMC_ACK MC_BUSY 78 nMC FAULT PERFOR MC SELECT Select a MC_PERROR nAut oF d E 5V1 nPP_AUTOFD Chassis E nPP_SELIN nPP INIT nPP STROBE 702 0001 12 LCTL4036E09
52. JC70 00229A 1 6 PMO LOCKER SIDE JC72 00763A 1 7 PMO LOCKER OPEN JC72 00762A 1 8 SPRING LOCKER TORSION JC61 00479A 1 9 SPRING FEED JC61 00478A 2 O 10 MEC UNIT TRAY ASS Y JC97 01577A 1 10 1 PMO TRAY CASE al 1 X 10 2 PMO TRAY EXT MP ii 1 X 10 3 PMO SIDE GUIDE MP i 1 X 10 4 PMO TRAY COVER MP 1 X 10 5 IPR GUIDE LATCH MP 1 X 10 6 PMO TRAY LINK MP 1 X 10 7 LABEL R HEIGHT MP 1 X 11 CBF HARNESS OPE GND JC39 00036A 1 12 PMO TIE STOPPER JC72 00766A 2 13 IPR BRKT GROUND B JC70 00230A 1 14 IPR BRKT GROUND TR JC70 00231A 1 O 15 IPR BRKT GROUND A JC70 00232A 1 16 IPR BRACKET GUIDE B JC70 00234A 1 17 PMO BUSHING FEED JC72 00730A 1 Samsung Electronics Service available X Service not available 5 13 Exploded Views and Parts List 5 5 Cassette Ass y Exploded View amp Parts List 5 14 Samsung Electronics Cassette Ass y Parts List Exploded Views and Parts List Service Available NO DESCRIPTION SEC CODE SA REMARK 0 MEA UNIT CASSETTE A4 ASS Y JC97 01642A 1 1 IPR FINGE i 1 X 2 IPR GUIDE PLT PAPER 1 X 3 IPR PLATE K UP JC70 00221A 1 X 4 IPR SPR PLT G SIDE JC70 10929A 1 O 5 PMO COVER CASSETTE C ki 1 X 6 PMO FRAME CASSETTE 1 X 7 PMO GUIDE FRONT CST 1 X 8 PMO GUIDE REAR JC72 00717A 1 9 PMO GUIDE SIDE CST JC72 40967D 1
53. PAPER JC72 00836A 1 26 2 PMO GUIDE CASSETTE RAIL JC72 00791A 1 26 3 SHEET FEED JC72 00078A 2 Samsung Electronics Service available X Service not available 5 3 Exploded Views and Parts List Main Parts List Cont Service Available NO DESCRIPTION SEC CODE Q TY SA REMARK 27 PBA SUB LIU JC92 01355A 1 ONLY SCX 5312F 28 PMO DUMMY BASE FRAME JC72 00789A 1 29 IPR SHIELD MAIN LOWER JC70 00245A 1 30 PMO COVER FEED AY JC72 00801A 1 31 PMO COVER BRKT MOTER JC72 00834A 1 32 PMO GUIDE PAPER OUT JC72 00835A 1 33 SHEET CONNECTOR 1 X 34 CBF HARNESS LSU i 1 X 35 CBF HARNESS POWER HVPS 1 X 36 HARNESS LIU 1 X ONLY SCX 5312F 37 CBF HARNESS LIU GND 2 38 HARNESS INLET KOR 1 39 IPR SHIELD SMPS UPPER 1 40 IPR SHIELD MAIN UPPER ia 1 X 41 IPR SHIELD SIMM 2 1 X 42 SUPPORTER 2 X ONLY SCX 5312F 43 PMO WINDOW SENSOR DEVE d 1 X 44 PMO CAM JAM REMOVE JC72 00799A 1 45 PMO LOCKER DEVE JC72 00805A 1 O 46 PMO LEVER JAM REMOVE JC72 00804A 1 47 IPR SHIELD SMPS LOWER JC70 00247A 1 48 GEAR PICK UP JC66 00335A 1 O 49 PMO BEARING SHAFT JC72 41191A 1 50 GEAR TRANSFER JC66 40947A 1 51 MEC ROLLER TRANSFER JC75 00148A 1 52 MEA UNIT HOLDER GEAR ASS Y JC97 01573A 1 52 1 SPRING ETC PLATE TR 1 52 2 SPRING ETC TR_L 7 1 X 5
54. SOLENOID ACTUATION CIRCUIT The fan actuation circuit its power using NPN TR When it receives FAN signal from the CPU The TR will turn on to make the voltage supplied to the fan to 24V in order to actuate the fan The solenoid is actuated in the same way When it receives control signal from the CPU the solenoid for paper feeding is actuated by switching circuit D29 1N4003 diode is applied to the both ends of the output terminal to protect Q22 KSC1008 Y from noise pulse induced while the solenoid is de energized 3 5 5 PTL ACTUATION CIRCUIT PTL actuation circuit switches its power using NPN TR 3 5 6 MOTOR ACTUATION CIRCUIT Motor actuation circuit is determined while selecting the initial driver IC provided by the vendor This system uses TEA3718 U57 U58 A2918 U59 s motor driver IC However the sensing resistance R273 R274 R292 R293 and refer ence resistance R284 R289 R294 R295 can vary depending on the motor actuation current value It receives motor enable signal 2 phase from CPU and generates bipolar pulse constant current and sends its output to Stepping motor input 3 5 7 HIGH VOLTAGE POWER SUPPLY 3 5 7 1 Summary It is the high voltage power supply that has DC 24V DC 5V used for the image forming device in OA digital picture devel oping method as the rated inputs It supplies electrifying voltage MHV supply voltage SUPPLY developing voltage DEV blade voltage BLADE and transferring vo
55. Scanner Ass y see page 3 2 2 Remove the five screws from the Platen Cover Platen Cover Ass y 3 Open the Cover open and pull the Cover Side L and Cover Side R and unlatch the Side Cover L by pushing the part hooked the Platen Cover using a sharp tool 5 Tack out he Open Cover Side Cover R Side Cover L Platen Cover Ass y 3 6 Samsung Electronics Disassembly and Reassembly 6 Take out the Pick up 7 Remove three screws and take out the ADF Remove the four screws and the ADF Upper Motor ass y So 26 E 5 SN Y ADF Upper uS SI Samsung Electronics 3 7 Disassembly and Reassembly 3 5 OPE Ass y 1 Before you remove the OPE Ass y you should remove Rear Cover see page 3 1 Scanner Ass y see page 3 2 2 Remove ten screws securing the OPE PBA and the LCD Module from the OPE Cover 3 Remove the contact rubbers from the unit 3 8 4 Remove the key pad from the unit Caution The above information is for the SCX 5312 model For the SCX 5112 model A parts is eliminated Samsung Electronics Disassembly and Reassembly 3 6 Side Cover Ass y 1 Remove the two screws to release the Stop MP Tray per Main Frame side securing the Side Cover to the Main Frame 1 the both side of the part to dissemble it 2 Completely open the Side Cover Ass y and 2 Asthe make
56. Sec Stand By 25 C Absolute Storage Condition Temperature 20 40 C Humidity 10 RH 95 RH Operating Condition Temperature 10 C 32 C Humidity 20 RH 80 RH Recommended Operating Condition Temperature 16 C 30 C Humidity 30 RH 70 RH Dimension W X D X H 560 X 433 X 459 mm Weight About 22 5 Kg with CRU Acoustic Noise Less than 56 47 dB Copy Printing mode Power Rating 100VAC 127VAC 15 50 60Hz AC 220VAC 240VAC 15 50 60Hz 3Hz Power Consumption Avg 320Wh No load Condition Power Save Consumption Avg 35Wh Recommended System Requirement Pentium 233 Mhz 64 RAM 120MB Hard Disk Minimum System Requirement Pentium 400Mhz 128 MB RAM 220MB Hard Disk LCD 16 characters X 2 lines Memory 4 Mbyte for flash Memory 16 Mbyte for DRAM Samsung Electronics 2 1 Specification 2 2 Printer Specifications Item Description Printing Method Laser Scanning Unit Electro Photography Speed Single Side 12 PPM Letter Size 5 Character Pattern Duplex 7 5 IPM Images Min Letter Size 5 Character Pattern Source of Light LSU Laser Scanning Unit Duplex Printing Yes Default Resolution Horizontal X Vertical True 600 X600 DPI 1200 DPI Class Feed Method Cassette Type By Pass Tray ADF Automatic Document Feede
57. T 510 0326 327 332 fOr vec 100 nA 4 Sir oe xz DGND 1 c298 5297 6285 DGND 4luF 100nF 100nF cay UST p hile T B MTRI PAT ug C328 B 1 RE u is C289 S g 10nF a R263 10 21180 2290 UST j i gt ik x PHASE MTRI_PAL m se mH 8 2 Zep 14 5 T 29188 2A e 2 ees 33 R26 1 A 1K enn 15 ho 16 9 113 vec Socko INSTPAR oe 023 296281216 163098279 16310 28213 8280pRZb6K 828gF 205 R300 3 R294 E AK 1 ocho nMTR EN 2 DGND C329 0233 Tone 59K Waar paas DGND TONER TX 1 DGND nif D D vee 2av MTR1_PB1 lt _ _____ E E R262 1K MTR1_PBI Legig Z 10 v OGND agnos 16 COMPANY NAME echo itd City F TITLE ize MCKINLEY V2 4 ENGR CHK MOTOR hi h Ti henge gb u eus 21 2001 17 Urewing Nunber amp 11 of 14 1 2 3 4 5 6 7 8 Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization SCHEMATIC DIAGRAMS Main Circuit Diagram 12 14
58. WHITE CLUTCH SUB 29 bi 1 X 4 4 GEAR CLUTCH 39 ii 1 X 4 5 GEAR IDLE 20 33 i 2 X 4 6 RING C 1 7 X 4 7 GEAR IDLE 17 35 2 4 8 GEAR IDLE 25 1 4 9 MOTOR ADF 1 4 10 GEAR JAM REMOVE 7 1 4 11 GEAR REDUCTION45 19 1 5 UNIT PICK UP ASS Y JC97 01582A 1 Samsung Electronics Service available X Service not available Exploded Views and Parts List 5 4 Side Cover Ass y Exploded View amp Parts List 5 12 Samsung Electronics Side Cover Ass y Parts List Exploded Views and Parts List Service Available NO DESCRIPTION SEC CODE Q TY SA REMARK 0 ELA HOU SIDE COVER ASS Y JC96 02183A 1 1 MEA UNIT DUPLEX ASS Y T 1 X 1 1 PMO GUIDE DP SIDE JC72 00806A 1 1 2 RING CS 6044 000001 2 O 1 3 SPRING FUSER EXIT JC61 70976A 2 1 4 GEAR DUP IDLER 17 JC66 00341A 3 1 5 GEAR MP DUP DRV JC66 00346A 1 1 6 IPR BRKT DUP JC70 00233A 1 1 7 PMO GP LOWER JC72 00732A 1 1 8 PMO SHAFT DUP DRIVER JC72 00764A 2 1 9 PMO ROLLER_EXIT JC72 40361A 2 1 10 RPR RUBBER EXIT JC73 10203A 2 1 11 PMO BUSHING TX B4 JG72 40744A 4 1 12 PMO TIE STOPPER JC72 00766A 2 1 13 HARNESS SCAN GND JC39 00046A 1 2 IPR PLATE SAW JC70 10232A 2 3 PMO FEED FRAME JC72 00731A 1 O 4 PMO HOLDER SAW JC72 41213A 1 O 5 IPR BRACKET GUIDE A
59. __ SUPPLY CON03 24 ZD502 150V R512 MGRI1 2W 12 R502 2K R516 MGR1 2W 50K R517 MGR1 2W 15MF 24 5 0102 Repair Manual This Document can not be used without Samsung s authorization SCHEMATIC DIAGRAMS HVPS Circuit Diagram 2 2 5V 18V R215 10K R201 100 THV PWM 13 gt 12 11 gt 10 3303 30KF CONUS U103 E EA Q201 7407 7407 708 R204 R202 24VS aK 100KF x C101 35V 47uF THV 4 500V gt i 5 CON03 1 3 Pa CON03 18 U103 C n 7407 D GND 105 HL THV READ 12 lt EE 302 CON03 20 R316 33K 1KF R317 2KF R301 C302 470K 102 C301 222 Repair Manual T201 C208 24 8 C206 HVT2A 6 471 6KV 471 D207 6KV D201 1N4148 6KV 471 6KV 471 THV R211 R212 BRI 2W 30MJ MGR1 2W 100KF D202 1N4148 R206 R213 C203 10203 270201 BR1 2W 200MG TOK 472 4148 56V 75V 3KV 471 R315 BR1 2W 30MJ C306 D303 C308 2KV680 4KV 471 D301 1N4148 R303 100KF R305 9 53KF D302 1N4148 C304 INDEX 500V 103 5K Samsung Electronics This Document not be used without Samsung s authorization SCHEMATIC DIAGRAMS 4 5 SMPS Circuit Diagram 110V
60. data into the host 7 Host sets nAUTOFD low to indicate that it is ready for the next byte 8 The cycle repeats but this time it is a command cycle because BUSY is low Repair Manual Samsung Electronics This Document not be used without Samsung s authorization CIRCUIT DESCRIPTION 3 4 2 USB INTERFACE CS RD VVR AQ ALE _ D 7 0 AD 7 0 INTR _ MODE 1 0 14 Vcc Microcontroller Interface GND Endpoint Contol FIFOs 48 MHz XIN XOUT CLKOUT Generator V3 3 AGND D D Upstream Port 3 4 2 1 Features Full Speed USB Node Device USB transceiver 3 3V signal voltage regulator 48 MHz oscillator circuit Programmable clock generator e Serial Interface Engine consisting of Physical Layer In terface PHY and Media Access Controller MAC USB Specification 1 0 compliant Control Status Register File USB Function Controller with seven FIFO based End points One bidirectional Control Endpoint 0 8bytes Three Transmit Endpoints 2 32 and 1 64 bytes Three Receive Endpoints 2 32 and 1 64 bytes 8 bit parallel interface with two selectable modes non multiplexed multiplexed Intel compatible DMA support for parallel interface MICROWIRE PLUS Interface 28 pin SO package o Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization CIRCUIT DE
61. gt Clean the machine Samsung Electronics Troubleshooting Horizontal Band Digital Printer Digi Printer Digital Printer Diaital Printer Digital Printer Digital Printer Digital Printer_ Digital Printer Digital Printer Muintan Eee rae NO Black band NO The OPC is damaged under the Black band is far about 95mm from direct sunlight for around 5 white band minutes gt If the same problem persists in 10 hours replace YES the developer Problem of internal contacts in OPC gt Replace developer NO This occurs when no Hsync at LSU gt Replace LSU The black band has regular interval Problems of terminal contact transfer voltage supplying and transfer roller s due to the charge roller is ruined 38mm Repair replace HVPS developer Does it appear at every 83mm at specific place 94mm interval The OPC is damaged due to the irregular transfer voltage of HVPS Repair replace HVPS gt If the same problem persists replace the developer Heat roller is ruined gt Replace the roller Samsung Electronics 4 29 Troubleshooting Irregular Density Digita Digita Digita Digita Digita OK after taking out and rocking the toner cartridge YES y It is over the guaranty life of toner cartridge Check the counter and rep
62. image Troubleshooting Aon Self test pattern prints Check connection to computer or replace controller Samsung Electronics Self testing is possible Take out the cartridge and prepare the tester for electronic connection Is the OPC terminal of machine is well connected gt next page Retest after replacing the connector or controller board Repair or replace the GND terminal Does the video data line to LSU transit to High Low when printing Check the path between Main board and HVPS Repair or replace the defective component or board The mirror in LSU might be misplaced so the light path to the OPC deviates gt Repair or replace LSU or remove any defective matters in the machine 4 21 Troubleshooting Transfer voltage OK on the transfer roller shaft YES NO Are the connection terminal and connection correct NO p gt __ Repair or replace terminal Replace HVPS or repair defective component Developing 300V and supplying 450V voltage are OK Does the counter indicate over the toner s guaranty life lig NO Is the connection terminal OK Repair or replace terminal YES Replace HVPS or repair defective component Transfer roller m
63. is well grounded 2 Measure the resistance between frame ground and the ground spring attached frame Confirm stable ground Unless bad ground detach cabinet check where is bad point 3 LSU running well 3 Adjust LSU or replace it 4 Biss voltage is normal 4 Normal Dev bias 350V 5 Lower toner 5 Shake toner cartridge and print If a liitke good toner is empty 6 Is there video data from Main PBA 6 Test engine test pattern replace Main PBA Light image 1 Check seal tape removing 1 Check and remove tape 2 LSU light power normal 2 LSU light power check is difficult Compare with new one and check 3 Enough toner 3 Check toner and developer counter 4 High charger voltage 4 5 Measure all high voltage output 5 Lower bias voltage 6 Contamination of high voltage contact 6 Leakage toner cause bad contact and increase contact resistance Clean contami nated area 7 Transfer volatge and roller Dark image 1 LSU light power normal 1 Check the rated level and replace 2 3 Bias voltage output is high Video data is always supplied 2 Set to power rating 3 Replace defected board 4 18 Samsung Electronics Troubleshooting Error Status Check Solution Background Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer 1 High voltage output is normal 2 C R of Toner cartridge is contaminated 1 Adjust to the rated status 2 Replace Toner c
64. the Tray Case and the after pull the part to the arrow direction to Tray Link in rectangular position to dissemble the top pull the part to the arrow direction the Tray Case from the Tray Link The Tray Link inner side locates at an angle of 45 from the Side Cover Ass y and then remove the Tray Link MP Tray Samsung Electronics 3 9 Disassembly and Reassembly Duplex Ass y 1 Unite the part and home to the projection part of the side Cover assembly and widen them from each other to dissemble the Side Cover Ass y Deplex Ass y 3 10 Transfer Roller Ass y 1 Take out the Transfer Roller as shown below Transfer Roller Samsung Electronics 3 7 Fuser Ass y 1 Before you remove the Fuser Ass y you should be power off and remove Side Cover Ass y see page 3 9 2 Remove the one screw and take out the Cover Sheet Connector AsS y Samsung Electronics Disassembly and Reassembly 6 Remove the two screws and take out the Halo gen Lamp Halogen Lamp 5 Remove the four screws and take out the Ther mostat Thermostat 7 After remove the two screw and open the Lower Ass y froward tack out the Heat Roller Ass y from Upper Fuser Ass y Disassembly and Reassembly 3 8 Exit Ass y 1 Before you remove Exit Ass y you should 3 Pull the exit ass y and remove it remove Rear Cover see page 3 1 Scanner A
65. to damage ESDs Do not remove a replacement ESD from its pro tective packaging until immediately before install ing it Most replacement ESDs are packaged with all leads shorted together by conductive foam aluminum foil or a comparable conductive material Immediately before removing the protective shorting material from the leads of a replace ment ESD touch the protective material to the chassis or circuit assembly into which the device will be installed Maintain continuous electrical contact between the ESD and the assembly into which it will be installed until completely plugged or soldered into the circuit Minimize bodily motions when handling unpack aged replacement ESDs Normal motions such as the brushing together of clothing fabric and lifting one s foot from a carpeted floor can gener ate static electricity sufficient to damage an ESD 1 4 Super Capacitor or Lithium Battery Precautions 1 Exercise caution when replacing a super capaci tor or Lithium battery There could be a danger of explosion and subsequent operator injury and or equipment damage if incorrectly installed 3 Super capacitor or Lithium batteries contain toxic substances and should not be opened crushed or burned for disposal 2 Be sure to replace the battery with the same or equivalent type recommended by the manufac turer 4 Dispose of used batteries according to the manu facture s instructions 1 2 Samsung Electronics
66. 0 to 30 pages using the recommended paper Transfer charge and developing voltage are OK Same problem occurs Operating storage atmosphere is too high temperature humidity dust around the charge roller YES END Replace the toner cartridge Clean the charge roller or replace step up device terminal after check Solve the problem under the recommended condition 10 32 degree Centigrade Check Terminals or contacts and Guide Deve Spring are misplaced gt Repair or replace transfer roller etc Check if the LED of PTL in front of the transfer roller is on when it presses the top cover switch on purpose gt f not replace PTL NO YES Internal blade or supplying part of the developer is defective gt Replace the toner cartridge Samsung Electronics Troubleshooting Ghost Digital Printer Digital Printer Digital Printer Is it regular interval of 58mm as transfer roller Is it regular interval of 95mm Is it regular interval of 45mm Replace PTL PTL lamp A specific part of the transfer assembly works OK roller has ruined or its resistance value is changed gt Replace transfer roller Transfer roller cannot force regularly due to the gears eccentricity of transfer roller gt Replace the defective
67. 00 ENGINE VERSION 2 1 00 EMULATION VERSION 2 PCL6 2 32 07 11 2001 1 48 07 19 2001 TOTAL PAGE COUNTS 8 LAS CRU PRINTS 8 EAS REPLACED TONER COUNTS 2 REPLACED DRUM COUNTS CURRENT DRUM COUNTS PLATEN SCAN PAGE COUNTS ADF SCAN PAGE COUNTS lt SYSTEM DATA LIST gt PATTERN TEST Using this pattern printout you can check if the printer mechanism is functioning properly It is needed in the production progress Service person doesn t need to use it ROM TEST Use this feature to test the machine S ROM The result and the software version appear in the LCD display e FLASH VER 1 00 V ENGINE VER 1 00V DRAM TEST Use this feature to test the machine s DRAM The result appears in the LCD display If all memory is working normally the LCD shows lt lt O K gt gt SRAM TEST Use this feature to test the machine s SRAM The result appears in the LCD display If all memory is working normally the LCD shows lt lt O K gt gt MODEM TEST Use this feature to hear various transmission signals to the telephone line from the modem and to check the modem If no transmission signal sound is heard it means that the modem part of the main board is poor 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 4 10 Samsung Electronics Troubleshooting NOTIFY TONER LOW With this feature enabled when the toner becomes low
68. 01 nPP STROBE nPP nPP IN nPP SE nMC ACK MC_BUSY PERROR PPD O 7 OPE TXD OPE RXD DEV_PWM THV_PUM MH jacho 18 T nHSYNC COMPANY NAME Address City R amp D CHK TITLE a ENGR CHK em MCK INLEY 2 4 SPGPet 6 Samsung Electronics This Document can not be used without Samsung s authorization Repair Manual SCHEMATIC Main Circuit Diagram 2 14 1 2 3 4 5 6 8 AC2 280 DC8 315 011 U19cL EB aom 15 pis 8 neis Acai 15 dag ois S 1 mon Me EN pi l2 a aoaie pia fal ns 2m gaoz ijas o uS 02 3 011 gt 4 pit E MEER Mules CENE Naas 0312 zc Air sana Air Sa p4 Ena e ici 2 cn Tus Ne Sas ps ILL ac 05 Drg 18 AB Ds eB 4 18 oa 95 pea ja 05 nca AG D a 0228 14 D2 35 Dc m 14 D2 35 pcs i 100nF as o2 22 02 vee eaae vee gt AT 07 core zia m i aa
69. 0202020202020202020202020 00000000 01100001 00010101 00000000 5 5 5 5 5 5 5 R S R S S HELP It shows a brief description on the machine s basic functions and commands Use it as a quick reference guide Samsung Electronics Troubleshooting RECEPTION This journal shows a specific information concerning reception activities the time and dates of up to 40 of the most recent receptions TRANSMISSION This journal shows a specific information concerning transmission activities the time and dates of up to 40 of the most recent transmissions SYSTEM DATA This list provides a list of the user system data settings and tech mode settings PHONEBOOK It lists all telephone numbers that have been stored in the machine SCHEDULE JOB This list shows a specific information on the documents currently stored for delayed transmission It provides the operation number starting time type of operation etc ERROR CODE It shows error history occurred using product 4 4 7 Firmware Upgrade It is a new Firmware and there are two Upgrade methods by local and remote 4 4 7 1 Local Machine RCP Remote Control Panel mode This method is for Parallel Port or USB Port Connect to PC and activate RCP Remote Control Panel to upgrade the Firmware lt Method gt How to Update Firmware using RCP 1 Connect PC and Printer with Parallel Cable or USB Cable 2 Execute RCP and select Firmware Upda
70. 0B AS SCANNER ASS Y FRU JC81 00742F AS OPE COVER 55 Y FRU JC81 00689B AS PLATEN ASS Y FRU JC81 00745F PMO COVER OPE C JC72 00796G PCT ONETOUCH PAPER JC72 00872G AS OPE COVER ASS Y FRU PMO COVER OPE C JC81 00748F JC72 00944G PCT LCD WINDOW JC72 00945G PCT LCD WINDOW JC72 00870G PMO COVER DUMMY OPE M JC72 00858G PBA SUB LIU JC92 01355A SCX 5312F XSA DESCRIPTION SEC CODE AS SCANNER ASS Y FRU JC81 00691A AS PLATEN ASS Y FRU JC81 00690A AS OPE COVER 55 Y FRU JC81 00689A PMO COVER OPE C JC72 00796A PCT ONETOUCH PAPER JC72 00872A PCT LCD WINDOW JC72 00870A PMO COVER DUMMY OPE M JC72 00858A PBA SUB LIU JC92 01355F Samsung Electronics Exploded Views and Parts List 5 Exploded View amp Parts List 5 1 Main Exploded View amp Parts List page 5 2 5 2 Platen Ass y Exploded View amp Parts List page 5 5 5 3 ADF ASS Y Exploded View amp Parts List 5 9 5 4 Side Cover Ass y Exploded View amp Parts List page 5 12 5 5 Cassette Ass y Exploded View amp Parts List page 5 14 5 6 Exit Ass y Exploded View amp Parts List page 5 16 5 7 Feeder Ass y Exploded View amp Parts List page
71. 0V ASS Y JC96 02178A 1 220V 1 PMO UPPER FUSER bi 1 X 2 RMO ROLLER HEAT 1 X 3 PMO BEARING H R F i 1 X 4 BEARING H R L bi 1 X 5 GEAR FUSER JC66 40913A 1 6 MEA UNIT CLAW ASS Y i 1 X 6 1 SPRING SAPERATION 4 X 6 2 PMO GUIDE CLAW 4 X 7 PEX ROLLER EXIT F UP 2 X 8 IPR PIN ROLLER EXIT bi 2 X 9 NPR ELECTRODE GEAR 1 X 10 NPR ELECTRODE M 1 X 11 NPR ELECTRODE F 1 X 12 THERMOSTAT 4712 000001 1 O 13 THERMISTOR FUSER JC14 00001A 1 O 14 LAMP HALOGEN 110V 4713 001158 1 O 110V LAMP HALOGEN 220V 4713 001157 1 220V 15 PMO LOWER FUSER 1 X 16 SPRING PR 1 X 17 BEARING PRESSURE R 2 X 18 RMO ROLLER PRESSURE 5 1 X 19 PMO LEVER JAM R 1 X 20 PMO LEVER JAM F T 1 X 21 PMO GUIDE INPUT bi 1 X 22 IPR GROUND FU 1 X 23 MEA UNIT ACTUATOR ASS Y JC97 01611A 1 O 23 1 PMO ACTUATOR EXIT 1 X 23 2 PMO GUIDE DUPLEX 1 X 23 3 PMO ARM ACTUATOR bi 1 X 23 4 GUIDE REMOVE E 1 X 24 SPRING ACTUATOR 2 2 X 25 LABEL R CAV HOT FU li 1 X 26 LABEL R LV FUSER bi 1 X 110V LABEL R HV FUSER 1 X 220V Samsung Electronics Service available X Service not available 5 29 Exploded Views and Parts List 5 14 Screw NO SEC CODE DESCRIPTION SPEC 61 6006 000127 SCREW ASS Y MACH WS PH M3 L6 ZPC YEL MSWR15 Qr S2 6001 000568 SCREW MACHINE PH M3 L8 NI PLT SM20C gs 53 6002 000175 SCREW TAPPING PWH 2 M3 L8 ZPC YEL SM20C SY 54 6002 000
72. 1 RISC MICROPROCESSOR PIN amp INTERFACE 4 CPU Data Bus 4 _ 8 mA s wwe i gt ovos w ow o EA o uen o wwe NN Lio 7 e 7 oes wwe m wr 1 Par oma cru twa oe ao a ma ap w Samsung Electronics This Document can not be used without Samsung s authorization CIRCUIT DESCRIPTION DATA23 CPU Data Bus 23 PHBTT8 8 mA DATA25 CPU Data Bus 23 8 8 mA DATA26 CPU Data Bus 23 8 8 mA o e E o DATA28 CPU Data Bus 23 PHBTT8 8 mA DATA29 CPU Data Bus 23 PHBTT8 8 mA o ine Feed Motor Phase 4mA LFIAT 5 H Lie Feed Motor Phase 4mA LFIBO OP6 Line Feed Motor Phase B LFIB1 Line Feed Motor Phase B TnRST TAP Controller Reset PHIT Analog Input 0 PICA eme EN AVssAVin 2 EBENEN Analog Input 2 PICA o Repair Manual Samsung Electronics This Document can not be used wihout Samsung s authorization CIRCUIT DESCRIPTION 1050
73. 18 C45 1WO 35J 50V102J1 8W680J 1 8W18KJ 5ova471J PT1 EER3435 1 24v 201 R66 R19 RD1 8W01 5KJ 1 8W5 6K3 c46 1 ZD 500MW30v ZD 500MW6 2V 4 8WAKJ 50v683J R25 202 R31 RV1 Rao 1 8W10KJ 1 8WA1KJ FUSER ON R34 z 1 1 2KJ NZ 12 ae 8W68J R26 R30 C1008 1 8W220J 2 1 feat 4 4 R28 R35 1 8W680J T 1 PC2 c19 5 104 gt SZ 123 104 Repair Manual 9 Samsung Electronics This Document can not be used without Samsung s authorization SCHEMATIC DIAGRAMS SMPS Circuit Diagram 220V F1 C CX104224 c2 F2 BD1 TNR2 ce c7 VAN o TNR 14V 182i LF1 C CX104224C Cv222 NU 2 C CX104224 D3SB60 24 C29 ACINPUT L t 1 35V1000uF AC INPUT Y 4 C 85V 135Vac 8 45D 8 4 24 L2 A ACINPUT N ANA 10 7 13 4 55 8 TNR1 INR14D561K ET 1W560KJ ts C10 Zi V SD D5 A R41 R42 R43 c22 400V330uF D10LC20U 35V1000uF1W1 2KJ 24vG R4 Q M 2W100KJ C cv222 GND eo t C cv222 E R5 R6
74. 2 3 PMO BUSH 1 52 4 PMO HOLDER GND 1 53 MEA UNIT HOLDER GND ASS Y JC97 01574A 1 53 1 SPRING ETC TR_R ig 1 53 2 PMO BUSH gt 1 53 3 PMO HOLDER GEAR TR 1 X Service available X Service not available 5 4 Samsung Electronics Exploded Views and Parts List 5 2 Platen Ass y Exploded View amp Parts List SCX 5112 SCX 5312F SCX 5112 Samsung Electronics 5 5 Exploded Views and Parts List 5 6 56 56 5 5312 5 5112 Samsung Electronics Platen Ass y Parts List Exploded Views and Parts List Service Available NO DESCRIPTION SEC CODE Q TY SA REMARK 0 ELA HOU PLATEN ASS Y refer to the table 1 O 1 MEA UNIT SCAN UPPER ASS Y JC97 01579A 1 O 1 1 AS DUMMY UPPER AS FRV JC81 00426A 1 O 1 1 1 MCT GLASS ADF 1 X 1 1 2 LABEL L REGISTRATION EDGE L 1 X 1 1 3 PMO DUMMY UPPER 1 X 1 1 4 SHEET DUMMY UPPER 3 1 X 1 2 PPR REGISTRATION EDGE F JC72 00809A 1 1 3 PMO COVER SCAN UPPER JC72 00758A 1 O 1 4 IPR HOLDER GLASS JB70 00148A 3 O 1 5 MEA UNIT GLASS PLATEN ASS Y JC97 01580A 1 1 5 1 LABEL P SHEET SHADING B 1 X 1 5 2 MCT GLASS SCANNER LEGAL 1 X 2 ELA HOU SCAN LOWER ASS Y SEC i 1 X 2 1 BELT TIMING GEAR 6602 001090 1 2 2 SPRING ETC BELT JB61 00059A 1 O 2 3
75. 3 above If it become better by shaking replace with a new developer after 50 100 sheets in the closing state of the life span 2 In case of 2 If it becomes better after cleaning the LSU window then the developer is nor mal Because of foreign substance on the LSU window the image has not been printed partly 3 In case of 3 If the cycle of noise is about 2 seconds the toner inside the developer has been nearly exhausted Purchase and replace with a new developer after using about 200 sheets at the point of occurrence 4 In case of 3 This is a phenomenon caused by lack of toner so replace with a new developer Toner Contamina tion e Toner is fallen on the papers periodically Contaminated with toner on prints partly or over the whole surface 1 Toner is fallen on the paper peri odically 1 Check the cycle of the falling of the toner 2 Check the appearance of both ends of the developer OPC drum 2 The center of the printed matter is contaminated with toner 1 Check whether foreign sub stances or toner are stuck to the terminal contact point of the developer 2 Check whether the state of the terminal assembly is normal 1 If both ends of the OPC drum are con taminated with toner Check the life of the developer 2 Check whether it could be recycled 4 42 Samsung Electronics Troubleshooting Fault Signs Cause amp Check Solution
76. 351 SCREW TAPPING PH 2 M2 L8 ZPC YEL SM20C S 55 6003 000119 SCREW TAPTITE BH B M3 L8 CBLACK SWRCH18A 56 6003 000196 SCREW TAPTITE PWH B M3 L10 NI PLT SWRCH18A 57 6003 000198 SCREW TAPTITE PWH B M3 L12 ZPC YEL SWRCH1 58 6003 000221 SCREW TAPTITE PWH S M4 L8 ZPC YEL SWRCH18 59 6003 000266 SCREW TAPTITE PWH S M3 L6 ZPC YEL SWRCH18 10 6003 000269 SCREW TAPTITE BH S M3 L6 ZPC YEL SWRCH18A 11 6003 001256 SCREW TAPTITE BH B M4 L10 NI PLT SWRCH18A 5 30 Samsung Electronics 6 Block Diagrams Block Diagrams MICOM LCD Drive Key Scan 5P P D SUB FLAT MOTOR 24P MOTOR DRIVER ADF MOTOR PAPER SENSOR X 2EA POS DET ADF OPTION CCD MODULE 22 Only SCX 5312F SPGPe ARM7TDMI 2 8 CNTR GEU VO VF USB IEEE 1284 Back up Part MOTOR DRIVER SW2918 TEA3718 SRAM 82KB FLASH ROM 1MB X 2EA FW FLASH ROM 1MB X 2EA PCL EXTERNAL GPIO DRAM 8 DRAM 8MB FONT ROM 23 8105 H L PCL 74HC245 74HC273 CIP3 Image Processor 12bit ADC
77. 4 aa DACA 11 ma n m m m nica tci DRAMDE DRAMD DgAMD2 DRAMD3 DRAMD4 DRAMDS DRAMDE DRANDT DRAMDS DRAMDIG ORANDI D2AMD 2 DRAMDIY DRAMDI4 DRAMDIG DRAMDIT DgAMDIS ORAMD28 DRAMD2 DORAMD22 DRAMD22 DRAMD24 DRAMD2SI pramn2g DRAMD27 DRAMD2R DgAMD28 gt DRAMD 8 31 m Tm mm Tm mmm mm mm TU mm anc wan FOYT TUS TED Em Emm ETE Ee Seca DRAMD3 RXD CT IN2 gt HYPER TXD HYPER IPT nF SYNC OPB ePRINT gt SELF REFRESH Ln DRAMEAS2 1 128 128 T yfr DRE 0002 ntas Y TXOR LFIAB DP4 35 5 8 MTR1i_PB lt nUSB_DRE nC 1P3_DREQ nUSB_DACK nC IP3_DACK nCIP3 CS nMODEM_CS KEYCLICK 10 50 nUSB CS MTRI PA lt nday ged August 27 20
78. 5 18 5 8 MP Ass y Exploded View amp Parts List page 5 20 5 9 Base Frame Exploded View amp Parts List page 5 22 5 10 Pick up Ass y Exploded View amp Parts List ides page 5 24 5 11 Drive Ass y Exploded View amp Parts List page 5 26 5 12 Main Frame Ass y Exploded View amp Parts List ies 5 28 5 13 FuserAss y Exploded View amp Parts List page 5 30 5 14 5 32 Deal drawings and service parts are declared for the items with higher rate of inferiority and replaceable in the level of service description only If inferiority occurs you can replace the parts by the unit declared in deal drawings and service items Way to observe Part Code amp Description Part code and Description is quoted and controlled by determined standard Refer to this determined standard it will help with ordering Part There are two kinds of Part code inscription type 0000 000000 2007 007961 R CHIP EEHO0 000008 ex JB96 01268A ELA UNIT COVER TOP It shows part specific figure 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
79. 7 18 gt SLEEP 18 19 GND 07 gt 29 5 0008 CISS 10058 1 lore 102 4 144 Pup 74ACT2 45 os C nRD 12 1 nIOCSO 1 U21 4 end 8 MC74VHC320R2 S vcc nWR U21 3 MC74VHC320R2 vec 027 u34 27 ig 20 vcc BI 20 M B2 17 D815 lt 355 5 Api gt nLD_ON 4 5 gt RESET aq 8514 e lt J nRING Spa 02 B aI gt nMODEM RST s 8613 nH00k2 134 038 gt nMTRI 8712 1405 0412 gt a7 ig 0515 2290 Ag ag nne FUSER bus SEND op 0718 196 fader TI ore cNn 4 x E R151 T4ACT245 5 4K 80010 echo in tin RED CHK TITLE DOC CTRL MCKINLEY_V2 4 MFG ENGR CHK ENG_GP IO O ERI eating 1 2 3 4 5 6 7 8 Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization SCHEMATIC DIAGRAMS Main Circuit Diagram 11 14 1 2 3 4 5 7 vec vec A A 2289
80. 8 Repair Manual Samsung Electronics This Document not be used without Samsung s authorization SCHEMATIC DIAGRAMS 4 2 LIU Circuit Diagram 1 2 3 4 5 7 8 l A PI Line 1K 2W gt line_C 05 BC547B gt o for EU PTT 11 6 25 1156 s 81 3 OPTION 1 2 100 on 454 kime Pam MPSA45 33nP2sov ELT1 gt line_B Dg B 51 A L14 2mH 1NS14 11 3 BRW tA 06 2 ARS2 VAR E MO 120K K X D 4 TAAU C 15K 188144 FEND E Ral GNDS VARS 3 eee 5 Tos gt RX 55 SEHR 1 11 4 RED FLT2 to R47 ARSS CML 1 R48 2 li R414 c38 600 H 20 52 520 Ae 1 E C36 1 5 qne 55
81. 860F L amp c49 INS TPARE 10 7 ADF M_TACQ SCAN_ADF_IACO gt 2 1 MC74NHC32DR2 5 SCAN ADF IAC DO U2 2 MC74VHC320R2 gt ADFM IBCO SCAN ADF 1882 gt g LEES 32082 gt ADF M IBCI SCAN ADF IBC T1 C30 2 4 MC74VHC320R2 741514 024 051 6 2sc2812L6 fA 1 1 PMOTOR C22 FLAT_MOT_CTL gt _ 0 SCAN_ADF_IACQ 04 1 MC74NHC320R2 amp mna SCAN ADF LIAC Ut 2 MC74VHC320R2 8 IBOD SCAN ADF IBCOD ut 3 MC74VHC320R2 11 TM_IB 1 U1 4 MC74VHC320R2 22 E e 4 Repair Manual ND TM_IAC1 2 4 TM_IACQ 410 SCAN_ADF_PHA 111 INS TPAR R271 8 5 TM_IB 1 TM_IBCQ E SCAN ADF PHE 3L12 INSTPAR R272 ngineer 52880110 LEY E amp SC e NEED This Document can not be used without Samsung s authorization Samsung Electronics SCHEM ATIC DIAGRAMS Main Circuit Diagram 9 14
82. AJ OO 5 FLAT_COVER fa CN20 1 21 x 0 741514 108 35303 1450 U61 4 pig 5 22 100 100 oF 1 _ L gt gt MODEM_RX r 23 TMB p 2 24 TM_NB 3 MODEM TXA1 I i c Nocno MODEM TXA2 4 Ae EA Er pin enn REMOTE 256281216 TA E 8 RISA IK 1 2 nHOOK2 1 CML1 a eega J nRING DET 2 R194 LI DP LG 1 lt I RECALL 1 LE A nE DP T C208 C202 m 0880010 F L I U Drawn By F i Uu ONLY Eus UN MFG ENGR CHK L eno qeu Te RR usc 27 2001 REY Heewing erigat 1 3 4 5 6 7 8 Repair Manual This Document can not be used without Samsung s authorization Samsung Electronics SCHEMATIC DIAGRAMS Main Circuit Diagram 13 14 1 2 3 4 5 7 8 24V 03 t2avs 240 048 280281216 TA NM DS14TI FUSER_ON FUSER 1N40031 2 N vee DUPLEX SOL R52 63k _ M 166 pues B 8 DGND R53 Nocno eese 01 98101 0250 BEAD 1 THERM lt oot He
83. AS OPE COVER ASS Y FRU JC81 00748A PCT ONETOUCH PAPER JC72 00872A PMO COVER OPE C JC72 00944A PCT LCD WINDOW JC72 00870A PMO COVER DUMMY OPE M JC72 00858A PBA SUB LIU JC92 01355G SCX 5312F XEG DESCRIPTION SEC CODE AS SCANNER ASS Y FRU JC81 00691B PCT LCD WINDOW JC72 00945A SCX 5112 XEG DESCRIPTION SEC CODE AS PLATEN ASS Y FRU JC81 00690F AS SCANNER ASS Y FRU JC81 00742B AS OPE COVER 55 Y FRU JC81 00689F AS PLATEN ASS Y FRU JC81 00745B PMO COVER OPE C JC72 00796C AS OPE COVER ASS Y FRU JC81 00748B PCT ONETOUCH PAPER JC72 00872C PMO COVER OPE C JC72 00944C PCT LCD WINDOW JC72 00870C PMO COVER DUMMY OPE M JC72 00858C PBA SUB LIU JC92 01355E SCX 5312F XEF DESCRIPTION SEC CODE AS SCANNER ASS Y FRU JC81 00691C PCT LCD WINDOW JC72 00945C SCX 5112 XEF DESCRIPTION SEC CODE AS PLATEN ASS Y FRU JC81 00690E AS SCANNER ASS Y FRU JC81 00742C AS OPE COVER 55 Y FRU JC81 00689E AS PLATEN ASS Y FRU JC81 00745C PMO COVER OPE C JC72 00796D AS OPE COVER ASS Y FRU JC81 00748C PCT ONETOUCH PAPER JC72 00872D PMO COVER OPE C JC72 00944D PCT LCD WINDOW JC72 00945D PCT LCD WINDOW JC72 00870D PMO COVER DUMMY OPE M JC72 00858D PBA SUB LIU JC92 01355E
84. Ass y Parts List Service Available NO DESCRIPTION SEC CODE Q TY SA REMARK 0 ELA HOU DRIVE ASS Y JC96 02181A 1 1 IPR BRKT MOTOR 1 2 MOTOR STEP JC31 00002B 2 3 CBF HARNESS MOTOR 1 4 RING E i 1 X 5 SOLENOID DUPLEX JC33 00008A 1 6 SPRING SOLENOID 1 7 IPR LINK SOLENOID 1 X 8 GEAR EXIT U ID 1 9 GEAR SWING DRV 1 10 35 19 3 1 X 11 GEAR 71 23 d 1 12 GEAR DEVE DRV 1 13 PMO DEV COUPLING i 1 X 14 GEAR RDCN OPC 1 X 15 GEAR 86 23 4 1 X 16 GEAR RDCN FEED OUTER E 1 X 17 GEAR HUB CLUTCH 2 18 GEAR RDCN FEED INNER i 1 X 19 GEAR FEED DRV 1 20 GEAR OPC DRV t 1 X 21 GEAR GEAR FUSER DRV OUTER 1 22 GEAR FUSER DRV INNER 1 23 RING E s 8 X O Service available X Service not available Samsung Electronics 5 25 Exploded Views and Parts List 5 12 Main Frame Ass y Exploded View amp Parts List 5 26 Samsung Electronics Main Frame Ass y Parts List Exploded Views and Parts List SA Service Available NO DESCRIPTION SEC CODE Q TY SA REMARK 0 ELA HOU FRAME MAIN ASS Y JC96 02184A 1 O 1 PMO HOUSING TERMINAL JC72 00802A 1 2 IPR TERMINAL BLADE 2 3 IPR TERMINAL SUPPLY 2 4 IPR TERMINAL
85. DF _P_DET d gt ADFM IBCUD L gt ADF P POS _ lt MODULE DETECT 15 ADF P 13 ADF P DET 14 75018 15611 T ADF _ _ 5 lt gt lt ADF PREGI GND2 s 16 2 r OPE RST 18 gt RXD D D 6 gt FLAT_OPEN LB lt 10 TXD 21 FLAT NA N3 1 R1 lt OUFLAT_A 1 cM4 1 en LES FLAT_NB pou e 52 l FLAT cH arar NENE 3 orate 0711 2402 4 3 38 ear FA gt OPE_RST FLAT_NB FINI SCAN A gt _ D gt arare E re L 35303 0550 5045 04 S7 DGND DGND POSU COMPANY NAME jacho ite City F Ban CHK TITLE Sue T MEE FLATCD SUB2 v1 4 MFG ENGR CHK as 21 20 19718508198 0 REV Urawing Number Sheet oF 2 3 4 5 7 8 Repair Manual This Document can not be used without Samsung s authorization Samsung Electronics SCHEMATIC DIAGRAMS 4 8 PTL Circuit Diagram 1 2 3 4 5 7 5v 5 25303 0250 1 RI R2 23 iK 16 DEER SAVRIF 818 54 C tet EZ SOLENS d5303 0208 D D E E Faeroe COMPANY 1 ress d dr
86. DS NDS NDS NDS NDS NDS NDS NDS C7 j eE Syn o 1 34 obs U2 3 CATaHC wx die 38 LEDO OPE 190 5 i CN2 5 5 6 47 4 R22 es NC2 LED2 e NE Treo pF Nc LED3 RT jk e CNDS CSACS_7 37MHz dis LCD HARNESS 14 2 54 LEDA 6 1K 4 4 LCD_RS cNDS 8 es Leps 145 R11 jk 6 5 LCD_RW 9 tebe is R13 A AE CE ense Bj 1073 E 3 1 5 NTI J SV cuter 7 2 ES Leova 5139 Si 4P exem SU_APESXAB SWAP Sxa8 2 SE Pon 406895 a x 8 8 LCD D LCD D1 5 E a 22K 9 LCD D2 41 CN1 9 as LCD D2 7 _ su_aP sx lt e s AE Oita TAS 10 18 LCD LCD D3 negle 4 ect iste 232 22k 11 LCD D4 18 keya 22 gt 12 LCD DS ey 8 SHEL 13 LCD_D amp 16 24 peo oted otea petted coc 233 13 12100 06 24 22k 14 LCD_D7 5 5 14 ame oo ee cu sw PPAR 7 Ge 0 svg FS sensor e R26 D ASV o p 1 22K Mea hs ate adhe oes Spare cuis SET 2 45 41 l4 45 41 NDS GNDS CND
87. E 8 ddress F nF RESETL acho iT Cit 3 TITLE 544 n A3 DOC CTRL CHK MCK INLEY V2 4 ENGR CHK FLASH F W amp EMUL Rhenged Tete Changed CHK REV Nunb Y ot Nondaus August 27 2001 ER qtd nS sF M 1 2 3 4 5 6 7 8 2 Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization SCHEMATIC DIAGRAMS Main Circuit Diagram 3 14 nDRASO me DRAMD 8 31 11 10 14V HCOSMX SELF _REFRESH DACO 11 DM74LS 14M 061 5 40 2 u40 4 14N HCOSMX TAVHCOSMX 6 13 12 U40 3 14N HCOSMX 39 8 gt nDRAS 9 100nF 1 EE C246 14 BEND nDRASO 508 N n GND 045 1 T4VHCOSMX NZ 45 2 48 3 14 08 GO74HCGGD RT 1 5 gt nRESET nCASTL gt u49 gt REF vec U45 3 eyes US RESIN SENSE 2 RESET uig RIC 4513 GND RESET nF RESET 26368 45 4 ACAS3 i TAVHCOSMX 11 3 R332 VDD GND EK 5 21 STDP a 411 R247 CLK 58 BAT2 TL7705 ACD Taur 16V gt 4 4 4 N 2 021 KSA D RB4200 114703
88. HV OUTPUT R413 12M gt 0103 7407 R408 R409 47K 390 20401 150V 3 5 7 5 BIAS supply dev blade output unit BIAS Electrification Output Enable Electrification Output Enable is the electrification output control signal PWM LOW ACTIVE When BIAS PWM LOW signal is received Q501 turns on and the steady voltage will be accepted to the non invert ing terminal of OP AMP 324 As the voltage higher than the inverting reference voltage of OP AMP which is set to R506 and R507 OP AMP output turns high This output sends IB to the TRANS auxiliary wire through current restricting resistance Q502 via R509 and C504 and Q502 turns on When the current is accepted to Q502 Ic increases to the cur rent proportional to time through the T201 primary coil and when it reaches the Hfe limit of Q502 it will not retain the on state but willturn to off As Q502 turns off TRANS 1 will have counter electromotive force discharge energy to the secondary unit sends current to the load and outputs DEV voltage through the high voltage output enable which is comprised of Regulation circuit T201 0502 R514 KAB 007 MGR1 2W 50K 4 BLADE 5V e u I C503 R508 0502 5 5 20501 W sis R506 1044 47K D526 Y C505 3KV 471 100V MGR1 2W 50K Q501 86 6KF 2KV 680 4 AA 4 SUPPLY BIAS PWM
89. Happened when inserting specific papers such 4 Take out the loaded papers and insert them reverse as envelope into the Manual Feeder direction inserted papers as recommended for Manual Feeding When loading tap the papers until paper detect sensor senses loading 5 Is the Stacker Extender is folded out 5 When using long papers use the Stacker Extender 6 Does not the Guide Adjust distort the papers 6 Adjust Guide to fit the paper width 1 Paper is stopped just after of fuser unit 1 Itis mostly resulted from double feeding Check paper is well stocked in feeder 2 Check feed actuator position and actuator s operat ing There may be stiff movind or double reflection If not so check the operation of feed sensor by Engine test mode 3 Check exit lever operation Remore jam and check actuator moving by hand If actuator is too stiff paper is wrapped around the heat roller Remove obstacles or replace Jam 2 Check where Jam 2 happens 1 Paper is curled and cannot exit 1 Remove paper using pinset or some tool and watch if separate claws have any troble Clean around fuser 2 Paper is curled in the exit cover 2 Check locking works wells Watch whether the ribs of exit cover hace any burr or resisitive edge If they do remove obstacles or replace 4 34 Samsung Electronics Troubleshooting Error Status Jam 2 at face down tray Check 1 Then paper is not drawn in because of the stack of papers i
90. NG GER FRE ITA SPA POR DUT USB MODE FAST SLOW HELP LIST HELP LIST PRINTOUT MAINTENANCE CLEAN DRUM NEW DRUM REPORTS SYSTEM DATA HELP LIST HELP LIST 4 4 Tech Mode 4 4 1 How to Enter Service Mode In service mode tech mode the technician can check the machine and perform various test to isolate the cause of a malfunction To enter the Tech mode press MENU 1 9 3 4 in sequence and the LCD briefly displays T the machine has entered service tech mode While in Tech mode the machine still performs all normal operations To return to normal user mode press MENU 1 9 3 4 in sequence again or turn the power off then on by unplugging and plugging the power cord Options changed while in service mode do not remain changed unless you clear the machine s memory Samsung Electronics 4 5 Troubleshooting 4 4 2 Setting up System in Tech Mode 4 4 2 1 SCX 5312F SETUP 1 9 3 4 Function Item Content SYSTEM DATA DIAL MODE TONE PULSE MODEM SPEED ERROR RATE 5 10 SET TX LEVEL 09 15 SILENCE TIME 12 NU OFF SYSTEM ID The same as User Mode DATE amp TIME The same as User Mode SYSTEM SETUP The same as User Mode MEMORY CLEAR CLEAR ALL MEMORY DELAY TX The same as User Mode MEMORY TX The same as User Mode PRIORITY TX The same as User Mode POLLING The same as User Mode ADD CANCEL The same as User Mode GROUP DIAL Th
91. O 3 RING E 6044 000125 2 O 4 SOLENOIDE MP JC33 00006A 1 5 SPRING CAM MP JC61 00003A 1 6 SPRING PICK 1 X 7 SPRING KNOCKUP MP JC61 00483A 1 8 IPR BRACKET SOLENOIDE 1 X 9 PMO HOLDER CAM MPF 5 1 X 10 PMO GEAR P U MPF 1 X 11 PMO ROLLER CAM MP 1 X 12 PMO ACTUATOR MP JC72 00767A 1 O 13 PMO ADJUSTER MP JC72 00768A 1 O 14 PMO CAM PICK JC72 00769A 1 O 15 PMO FRAME MP i 1 X 16 PMO HOLDER PAD MP JC72 00771A 1 O 17 PMO HOLDER SENSOR MP JC72 00772A 1 O 18 PMO HOUSING PICK UP MP 1 X 19 PMO PLATE KNOCK UP MP 1 X 20 PMO IDLE PICK JC72 41027A 2 O 21 RPR RUBBER PICK 1 X 22 RPR RCT PAD PICKUPMP JC73 00090A 1 23 RPR PAD KNOCK JC73 10906A 1 24 PBA SUB MP SEN JC92 01362A 1 Samsung Electronics Service available X Service not available 5 21 Exploded Views and Parts List 5 9 Base Frame Exploded View amp Parts List Base Frame Parts List Service Available NO DESCRIPTION SEC CODE Q TY SA REMARK 0 ELA HOU BASE FRAME ASS Y JC96 02179A 1 1 SPRING DEVE FRONT 1 2 HARNESS OPC GND 1 3 SPRING DEVE REAR 1 4 SPRING TORSION 1 5 FOOT RUBBER JC61 40001A 2 6 1 7 IPR CHANNEL BASE FRAME 1 8 IPR GROUND PLATE JC70 00240A 1 9 IPR GROUND PLATE B BASE JC70 00241A 1 10
92. R PA EXIT ASS Y JC97 01556A i O 2 1 PMO TRAY EXTENTION MP NE JC72 00354B 1 O 2 2 PMO COVER PAPER EXIT JC72 00786A 1 3 MEC CASSETTE ASS Y LETTER JC97 01642A 1 LETTER A4 4 MEA UNIT COVER FRONT ASS Y JC97 01572A 1 5 UNIT LSU JC59 00014A 1 O 6 SMPS SMPS V1 HVPS JC44 00039A 1 110V SMPS SMPS V2 HVPS JC44 00035A 1 O 220V 7 ELA OPC UNIT SET 1 X 8 ELA TONER UNIT SET 1 9 ELA HOU PICKUP ASS Y JC96 02180A 1 10 HOU SIDE COVER ASS Y JC96 02183A 1 O 11 ELA HOU MP ASS Y JC96 02182A 1 12 ELA HOU BASE FRAME ASS Y 5 1 X 13 MEC FEED ASS Y JC75 00143A 1 O 14 ELA HOU FUSER 110V ASS Y JC96 02194A 1 O 110V ELA HOU FUSER 220V ASS Y JC96 02178A 1 220V 15 ELA HOU FRAME MAIN ASS Y JC96 02184A 1 O 16 MEC EXIT ASS Y JC97 01643A 1 O 17 ELA HOU DRIVE ASS Y JC96 02181A 1 18 MEA UNIT COVER REAR ASS Y JC97 01557A 1 18 1 SIMM XRX 72 41224 1 18 2 PMO COVER REAR JC72 00788A 1 19 92 01354 1 SCX 5312F 19 PBA MAIN MAIN JC92 01399A 1 O SCX 5112 20 PMO CONNECT PAPER MFP JC72 00782A 1 SCX 5312F PMO CONNECT PAPER MFP JC72 00782B 1 5 5112 21 ELA HOU DUCT FAN JC96 02311A 1 O 21 1 FAN DC JC31 00012A 1 O 21 2 PMO DUCT FAN JC72 00807A 1 O 23 CBF POWER STITCH GRAY JC39 00055B 1 O 24 SOLENOID PICK UP JC33 00007A 1 O 25 PMO COVER EXIT REAR JC72 00790A 1 26 MEA UNIT GUIDE CST ASS Y JC97 01575A 1 O 26 1 PMO SHEET GUIDE
93. RAMS 4 1 Main Circuit Diagram DCO 315 AC 20 1011110133 N u31 3 3V DATAT DATAS DATAS DATA 10 DATAN DATA 12 DATA 12 DATA 14 DATAS DATAE DATATT DATAIR 19 DATA 20 DATA2 DATA22 DATA23 DATA24 DATAS DATA26 DATA2T DATA2B ZH DATA 29 DATA 2A DATARI ADDR2 ADDR3 ADDRA ADDRS 0086 ADDRT ADDR 0089 ADDR 10 ADDR It ADDR 12 ADDR 13 ADDR 14 ADDR 18 ADDR IE ADDR 17 ADDR 18 ADDR 19 ADDR 28 ADDR2 ADDR22 ADDR22 nROMUR nRD nSRAM CS nROMCS3 nFLASH_CS1 nF OI nROMCS2 nFLASH CSO TX INT nUSB_INT nwo TOUTS UTE 7 PTOUT MCA 3 nDRAMCAS InDRAMRAS 1208 123 nDREDA 1P E InDMACKI TxD2 n DIA CKB DPI 1254 DC53 SUFSEL 0052 TONE DUI 0251 10056 InEMSG Pu Mt ln EPRDT RXOR IN AUT DFD STROBE THERM 10 PGND vec uso THVREAD LD11170T3BC TN nRST_OUT SND DRAM AG SYSCLK DRAM A2 DRAM A3 DRAMA4 DRAMAS DRAM AG DRAMAT DRAMAS DRAM Ag DRAMA TAI DRAMA
94. S VSS KEY 7 821 HWI48850 F 5 02 4 MNSUSTATI cNDS su 98 s 9b s 98 s su BP s REGRIYP BODE 2 o gt 2 __ _____ 5 4 patos R28 219 22k _Les 10 5 100nF 04 su db s ERE s M s su d s 2 si dett p co 40 04 2575 4 pets ole 1 u us E E leti E 218 06 sw 28 sub s sw 6 s su 28 su 28 ERR GND5 GNDS 07 230 22k al ANN GNDS 08 Engineer COMPANY NAME F Ursus By Address F CHK THLE Su DOC CTRL CHK Mckinley KOREA MFG ENGR CHK OPE 1 thangad pan 3o01 25 enel OK REV Brewing Number Sheet oF 1 2 3 4 5 7 8 Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization SCHEMATIC DIAGRAMS 4 4 HVPS Circuit Diagram 1 2 Samsung Electronics 5v 18V T401 KAB 006 R419 5 6K R418 MGR1 2W 100KF __ 0401 0402 708 D526 Y MHV PWM C406 C405 3KV 471 R416 R408 2KV 680 CON03 22 MGR1 2W 30 R413 MGRI 2W 12MF R411 2K 1N4148 70401 1 150V 24VS T501 R514 MGR1 2W 50K Q502 D526 Y Q501 A708 Y BIAS PWM C505 2KV 680 R515 MGRI1 2W 50K
95. SCRIPTION CS 2 DATA IN WR gt 1 DATA OUT DATA OUT D 7 0 ADDRESS Ox3F REGISTERFILE lt Non Multiplexed Mode Interface Block Diagram gt oro input vvrte Address Read Data I Burst Read Data Non Multiplexed Mode Basic Timing Diagram Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization CIRCUIT DESCRIPTION 3 5 Engine Controller 3 5 1 FUSER CONTROL THERMISTOR CIRCUIT This circuit controls the heat lamp temperature to fix the transferred toner on the paper It is comprised of the thermistor that has the negative resistance against the temperature and LM393 voltage comparator and transistor for switching The thermistor has the resistance value reverse proportional to the heat lamp surface temperature The voltage value is read by 60 pin AVIN2 of CPU refering to the parallel combined resistance with the resistor R43 connected parallel to it and the voltage distribution of R29 The voltage read activates inactivates fuser signal to high or low referring to the set tempera ture and when the fuseron signal turns down high to low high by Q3 switching the S21ME4 inside SMPS PC3 turns on off and this eventually turns two way thyristor THY501 on off to allow shut AC voltage to the heat lamp LM393 is designed to protect the sy
96. U3 5 m CM 407 4x A up Sa 648 c53 vec vee vec vec reno Ed CN19 1 35303 0650 CN18 1 fag T o gt e poga 35303 0350 m gt gt nFEED E C26 3 7 vec i gt A TONER s 1 3 106 gt lt gt 4028 __ 18 l 5 gt Ji EM 14 6v PBL 231 219 B isp L 18nF TONERS 2 lt FEED 7 gua din 00 26 5 27 032 ig ER M THV 50V U3 2 0 7407 rend N16 1 yee eg 5045 034 C THVREAD pecu NN I HC DEV p FUSER ON vec 24V lt SPK aoe Eel a7 052 is MHV_PWM SE To c24 lt SPK 6 5 E L vec 3 3 ee BN 140 1NX v PWR HVPS ee E R326 35303 0450 1 o SE D PUge i a 2 gt noUTBIN FULL 3303 o260 DM7407MX Sine 1 4 l DGND L 2 OUT BIN FULL R287 PTL 3 1 IK ate PTL 236281256 2 25s 180nF CN17 1 E 35303 0450 1 2156 156 BIB l 2 nTONER_RX 31 C191 tone gt 4 TONER COMPANY ress F acho itO Cit d TITLE ize DOC CTRL CHK MCKINLEY V2 4 ENOR CHE PWR amp SENSOR Change Det eee August 27 2001 0 CHK REV Urawing Number Sheet 14 of 14 1 2 3 4 5 7
97. UNT USED TONER COUNT TOTAL PAGE COUNT ADJUST SHADING FLASH UPGRADE REPORTS SYSTEM DATA HELP LIST HELP LIST ERROR CODE Samsung Electronics 4 7 Troubleshooting 4 4 3 SYSTEM DATA DIALING MODE Select the dialing mode according to the user s line status TONE Electrical type of dial PULSE Mechanical type of dial SILENCE TIME In ANS FAX mode after a call is picked up by the answering machine the machine monitors the line If a period of silence is detected on the line at any time the call will be treated as a fax message and the machine begins receiving Silence detection time is selectable between limited about 12 seconds and unlimited time When 12 is selected the machine switches to receiving mode as soon as it detects a period of silence When unlimited is selected the machine waits until the answering operation is concluded even though period of silence is detected After the answering operation is concluded the machine switches to receiving mode SEND FAX LEVEL You can set the level of the transmission signal Typically the Tx level should be under 12 dBm Caution The Send Fax Level is set at the best condition in the shipment from factory Never change settings arbitrarily ERROR RATE When the error rate is about to be over the setting value the Baud rate automatically lowers up to 2400 bps to make the error rate remain below the setting value You can select the rate between 5
98. able 1 O 3 3 PMO COVER DUMMY refer to the table 1 O 3 4 PCT ONETOUCH PAPER refer to the table 1 O 3 5 PCT ONETOUCH CARD JC72 00871A 1 3 6 ONETOUCH JC72 00860A 1 O 3 7 PMO KEY SHIFT JC72 00861A 1 3 8 JC72 00862A 1 3 9 RMO RUBBER JC73 00104A 1 O 3 10 PMO KEY SCROLL JC72 00866A 1 O 3 11 RMO RUBBER SCROLL JC73 00106A 1 O 3 12 PMO KEY COPY JC72 00863A 1 3 13 TEL JC72 00865A 1 O 3 14 PMO KEY OHD JC72 00864A 1 O 3 15 PMO KEY SAVE T JC72 00923A 1 3 16 JC72 00867A 1 3 17 START JC72 00868A 1 3 18 PMO KEY STOP JC72 00869A 1 3 19 RMO RUBBER TEL JC73 00105A 1 3 20 PBA SUB OPE KOR JC92 01380B 1 3 21 NPR BADGE JC71 00008A 1 5112 DESCRIPTION SEC CODE Q TY SA REMARK 3 ELA HOU OPE COVER ASS Y C refer to the table 1 3 1 refer to the table 1 3 2 PCT LCD WINDOW refer to the table 1 O 3 3 PMO COVER DUMMY OPE C refer to the table 1 3 4 PMO KEY SCROLL JC72 00866A 1 O 3 5 PMO KEY COPY JC72 00863A 1 O 3 6 PMO KEY TEL JC72 00865A 1 3 7 PMO KEY SAVE T JC72 00923A 1 3 8 72 00867 1 3 9 PMO KEY STOP JC72 00869A 1 O 3 10 PMO KEY START JC72 00868A 1 O 3 11 PMO KEY OHD JC72 00864B 1 3 12 RMO RUBBER SCROLL JC73 00106A 1 3 13 RMO RUBBER TEL JC73 00105A 1 3 14 PBA SUB OPE KOR JC92 01380B 1 3 15 NPR BADGE JC71 00008A 1 O
99. ailable X Service not available 5 17 Exploded Views and Parts List 5 7 Feeder Ass y Exploded View amp Parts List 5 18 Samsung Electronics Feeder Ass y Parts List Exploded Views and Parts List Service Available NO DESCRIPTION SEC CODE Q TY SA REMARK 0 MEC FEED ASS Y JC75 00143A 1 O 1 PMO FRAME FEED i 1 X 2 GEAR FEED x 1 X 3 GEAR MP DUP DRV i 1 X 4 ICT SHAFT FEED 1 X 5 BEARING PICKUP 2 X 6 RING E 2 X 7 RING CS E 1 X 8 PMO BRKT FEED E 1 X 9 PMO ROLLER FEED JC72 00727A 1 O 10 PMO HOLDER PINCH C 1 X 11 PMO HOLDER PINCH SUB 1 X 12 PMO ROLLER FEED 3 X 13 SPRING FEED CAST 1 X 14 PMO HOLDER PINCH M 1 X 15 PMO SUB HOLDER FEED 1 X 16 SPRING FEED MP 1 X 17 WASHER PLAIN 3 X 18 PMO ROLLER FEED S 1 X 19 IPR SHAFT FEED IDLER 3 4 X Samsung Electronics Service available X Service not available 5 19 Exploded Views and Parts List 5 8 MP Ass y Exploded View amp Parts List Samsung Electronics 5 20 Ass y Parts List Exploded Views and Parts List Service Available NO DESCRIPTION SEC CODE Q TY SA REMARK 0 ELA HOU MP ASS Y JC96 02182A 1 O 1 A S PICK UP MP AS FRU JC81 00427A 1 O 2 PMO BUSHING PICKUP MP JC72 41364A 2
100. and 10 MODEM SPEED You can set the maximum modem speed Communication is done with modem speed automatically set at lower speed when communicating with the modem with lower speed since communication is done on the standard of the side where modem speed is low for transmission reception It is better set 33 6Kbps as default setting 4 4 4 MEMORY CLEAR CLEAR ALL MEMORY The function resets the system as its very first condition as setting in at the factory This function is needed to operate to reset the system to the initial value when the product is abnormally oper ated or malfunction All the values are returned to the default values and all the information which set in by user will be erased lt Method gt 1 Select the MEMORY CLEAR at the TECH MODE 2 Push the ENTER button 3 Select you country 4 Push the ENTER button then it will be all memory clear NOTICE Always perform the memory clear after replace the main board Otherwise the system may not operate properly 8 Samsung Electronics Troubleshooting 4 4 5 MAINTENANCE CLEAN DRUM Use this feature to get rid of the toner remained in the development unit so you can get a clean printout Perform this feature if stains or specks appear on the printing materials and print quality falls Perform this feature several times until a clean printing material appears The machine automatically pulls a sheet of paper and prints out The toner particles on t
101. artridge Ghost Digital Printer Digital Printer Digital Printer 1 High voltage output 2 Pre Transfer Lamp 3 Bad high voltage contact Check every high voltage 2 Check the turn on PTL LED crash 3 Clean the inside machine or replace toner cartridge Stains on back of paper 1 Contamination of transfer roller 2 Stains of paper path 3 Pressure roller s contamination Clean the transfer roller with vaccum cleaner 2 Clean the area of paper path with cloth or air cleaner 3 Remove fuser and replace it Poor Fusing 1 Use recommended paper 2 Check fusing temperature 3 The machine was under the low tempera ture for a long time Should use recommended paper Check engine controller board If you have not thermometer measure the thermistor voltage to CPU If 2 3V 5 in printing CPU works well Then disas semble fuser and check the thermistor contact and thermistor 3 Re check after putting the machine in the warm place for certain period Partial blank image not periodic 1 Toner is low 2 The toner cartridge is out of position Replace Toner cartridge 2 Checkand adjust Samsung Electronics 4 19 Troubleshooting Error Status Check Solution Partial blank image periodic 1 Develope roller scar or particle 2 Scar or particle 94 mm 3 Transfer roller scar or particle
102. bnormal noise Check the Scanner Motor and any mechanical disturbance Check the right position of the Scanner Motor and check the any mechanical dis turbance in the CCD carriaging part Check the motor driver in Driver PBA f any driver is defective replace it 055 or U56 1 to 24V swing signal when operating 4 16 Samsung Electronics 4 6 2 SCX 5312F 4 6 2 1 FAX TELEPHONE Precautions Troubleshooting PROBLEM TEL LINE CANNOT BE ENGAGED NO DIAL TONE Cannot MF dial ITEMS TO BE CHECKED When you press OHD key a Check line cord connection b Check MAIN LIU harness and CN1 LIU PBA Check relay operation of LIU PBA Is the control signal of CN20 7 main low Check CN20 main PBA MAIN LIU harness and CN1 LIU PBA HOW TO SOLVE a insert it correctly into the connection jack called line b Replace defective parts c Replace main IF the control signal of CN20 7 main is high Replace LIU if high but phone line cannot be connected Replace defective parts MF dial is possible but not DP dial Check DP control signal of CN20 11 of MAIN and the circuit around R15 06 and Q2 of Liu PBA Replace LIU PBA Defective fax transmis sion Check CN20 main PBA MAIN LIU harness CN1 LIU PBA s the external phone hooked off e Check hook off Refer to TEL LINE
103. bout the possible set up by user 4 3 1 SCX 5312F Function Item Content SYSTEM DATA CASSETTE PAPER LETTER A4 LEGAL BYPASS PAPER LETTER 4 LEGAL MESSAGE COMF ON OFF ERROR AUTO JOURNAL ON OFF RECEIVE CODE 0 9 POWER SAVE ON OFF ECM MODE ON OFF RX REDUCTION ON OFF DISCARD SIZE 0 30mm REDIAL INTERVAL 1 15 REDIALS 1 13 ANSWER ON RING 1 7 SEND FROM MEMORY ON OFF LOCAL ID ON OFF CLOCK MODE 12 24 HOUR SYSTEM ID FAX ID DATE amp TIME SYSTEM SETUP PREFIX DIAL NO RINGER VOLUME LOW HIGH 10 STEPS ALARM SOUND ON OFF KEY SOUND ON OFF SPEAKER CONTROL COM ON OFF SELECT LANGUAGE ENG GER FRE ITA SPA POR DUT USB MODE FAST SLOW FAX DUPLEX OFF LONG EDGE SHORT EDGE IMAGE QUALITY NORMAL TEXT IMAGE MEMORY CLEAR SYSTEM ID SYSTEM DATA PHONE BOOK MEMORY TX RX JOURNAL DELAY TX MEMORY TX PRIORITY TX POLLING ADD CANCEL ADD CANCEL GROUP DIAL MAINTENANCE CLEAN DRUM NEW DRUM NOTIFY TONER LOW ON OFF 4 4 Samsung Electronics Troubleshooting Function Item Content TX CONFIRM SCHEDULE JOB PHONE BOOK SYSTEM LIST TX JOURNAL RX JOURNAL HELP LIST HELP LIST 4 3 2 SCX 5112 Function Item Content SYSTEM DATA CASSETTE PAPER LETTER A4 LEGAL BYPASS PAPER LETTER A4 LEGAL POWER SAVE ON OFF SELECT LANGUAGE E
104. brary 2 Frequency 50 MHz 3 On Chip oscillator 4 Method Raster scanning method 5 Image Sauce 300 400 600dpi CIS amp CCD 6 Scanning Mode color gray image each 8 bits RGB mono gray image 8 bits pixel binary image 1 bit pixel for text photo mixed mode 7 Maximum scanning width 600dpi 8K effective pixels 8 Ideal MSLT A4 600 300dpi color gray image 9x5Kx80nsec 1 2msec 7 28 CPM mono gray image 1x5Kx80nsec 0 4msec 21 84 CPM binary image 1x5Kx80nsec 0 4msec 21 84 9 A D conversion depth 12bits Pixel processing structure Minimum pixel processing time 4 system clocks High speed pipelined processing method Shading correction Gamma correction Enlargement Reducement and Binarization Shading Correction 1 White shading correction support for each R G B 2 White shading data memory 3x8Kx12bits 288Kbits 384Kbits external 3 Black shading data memory 3x8Kx12bits 288Kbits 384Kbits external Gamma Correction 1 Independent Gamma table for each RGB component 2 Gamma table data memory 3x1Kx8bits 24Kbits internal Binarization mono 1 256 Gray s halftone representation for Photo document 3x5 EDF Error DifFusion method proposed by Stuck 2 LAT Local Adaptive Thresholding for Text document use of 5x5 LOCAL WINDOW ALGORITHM e ABC Automatic Background Control Tmin Automatic change 3 Mixed mode proc
105. ce clock used or the spread bandwidth Refer to FS781 Spec for detail 3 2 7 USB UNIVERSAL SERIAL BUS NS s USBN9602 is used as the interface IC and 48MHz clock is used When the data is received through the USB port EIRQ1 SIGNAL is activated to send interrupt to CPU then it directly sends the data to DRAM by IOCS4 amp DRAMA 11 SIGNAL through DRAMD 24 31 3 2 8 SRAM 32KB SRAM It stores a variety of option data 3 2 9 FAX TRANSCEIVER Only SCX 5312F 3 2 9 1 GENERAL This circuit processes transmission signals of modem and between LIU and modem 3 2 9 2 MODEM 44 FM336 is a single ship fax modem It has functions of detection and signal production as well as functions of modem TX A1 2 is transmission output port and RX IN is received data input port POR signal controlled by MFP controller U36 KS32C61200 can initialize modem nMODEM RST without turning off the system 00 07 are 8 bit data buses RSO RS4 signals to select the register in modem chips RS and WR signals control READ and WRITE respectively IRQ is a signal for modem interrupt Transmission speed of FM336 is supported up to 33 6k The modem is connected to LINE through transformer directly FM336 lt lt FAX TX RX Matching Transformer T2 MAIN LIU FAX TRANSCEIVER gt Repair Manual Samsung Electronics This Document can not be used without Samsung s autho
106. ction 4 5 3 ENGINE PRINT When the function is on sentence to explain the condition of engine is printed in the below section of the print ing output 4 14 Samsung Electronics Troubleshooting It is needed in the development progress Service person doesn t need to use it 4 6 Troubleshooting 4 6 1 Scanner 4 6 1 1 COPY PROBLEM ITEMS TO BE CHECKED HOW TO SOLVE White copy Check the Scan Cover open Room light can transit a thin original Check shading profile Remake shading profile in the tech mode Check white black reference voltage e Replace U16 if it is defective Main PBA 016 97 2 5V 016 98 3 3V U16 99 1 5V Check turning the CCD Lamp on when If the CCD is defective replace it operating CN3 19 is 5 8V when white original copy ing for R B and 3 5V for G Black copy Check the CCD problem in Main PBA Check the CCD harness contact Check shading profile Check the CCD problem in Main PBA Remake shading profile in the tech mode If the CCD is defective replace it Cn3 19 is 7 3V when idle for R B and 5V for G Defective image quality Check shading profile Remake shading profile in the tech mode Check the gap between original and scan ner glass The gap above 0 5mm can cause a blurred image Check printing quality See Print troubleshooting Abnormal noise Check th
107. data The address to read and write the data is specified by RAS SIGNAL and CAS SIGNAL DRAMWE SIGNAL is activated when writing data and DRAMOE SIGNAL when reading You can expand up to 64MBYTE of DRAM in this sys tem Oxf f fff ff bank3 Next bank3 Base bank2 Next bank2 Base bank1 Next bank1 Base Next Base 0x 0000000 lt DRAM Bank Configuration gt Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization Repair Manual E CIRCUIT DESCRIPTION lt FPM Read Timing Diagram gt This Document can not be used without Samsung s authorization Fast Page Mode DRAM can access the page mode It can read consecutive cells by accessing the page mode while access ing the burst For FPM DRAM the data are valid only when the nCAS is active While configuring the software you must set the timing register of SFR considering the clock speed and the DRAM spec 3 2 5 1 Fpm DRAM reading Timing Samsung Electronics Samsung Electronics gt gp Te gp 8 d m o HT e 5 s E 2 i 5 LL t ra D S 2 o a 2 ee gt a c 5 E g ES i
108. e and the LCD briefly displays T the machine has entered service No Sub No Engine test Remark 0 1 Motor Test 1 On 2 Off 2 PTL Test 1 On 2 Off 3 Fan Test 1 On 2 Off 4 Fuser Test 1 On 2 Off If its temperature is lower than the Standby 160 C the fuser is on but if it is higher than the Standby the fuser is off 1 1 LSU Motor Test 1 On 2 Off 2 LSU Hsync Test 1 On 2 Off 3 LD On Test 1 On 2 Off 4 LSU Operation 1 On 2 Off 2 1 Feed Sensor Test Sensor On FEED SENSOR ON Display Sensor Off FEED SENSOR OFF Display 2 Exit Sensor Test Sensor On EXIT SENSOR ON Display Sensor Off EXIT SENSOR OFF Display 3 Cover Sensor Test Sensor On COVER SENSOR ON Display Sensor Off COVER SENSOR OFF Display 4 1 st CAST Empty Test Sensor On 1 st PAPER Empty Display Sensor Off t st PAPER No Empty Display 5 MP Empty Sen Test Sensor On MP PAPER Empty Display Sensor Off MP PAPER No Empty Display 6 BIN FULL Sen TEST Sensor On BIN FULL SEN ON Display Sensor Off BIN FULL SEN OFF Display 3 1 1 st CAST Solenoid Test 1 On 2 Off 2 MP Solenoid Test 1 On 2 Off 3 Duplex Solenoid Test 1 On 2 Off 4 1 MHV Test 1 On 2 Off 1450v 2 DevBias Test 1 On 2 Off 450v 3 THV EN NEG Test 1 On 2 Off 4 THV Test 1 On 2 Off 1300v 5 THV Trigger Test 1 On 2 Off 5 1 All Function Test E ina up key Next fun
109. e Scanner Motor and any mechanical disturbance Check the right position of the Scanner Motor and check the any mechanical dis turbance in the CCD carriaging part Check the Motor Driver in Driver PBA f any driver is defective replace it 055 1 or 055 15 to 24V swing signal when operating Samsung Electronics 4 15 Troubleshooting 4 6 1 2 PC Scan PROBLEM Scanning Error ITEMS TO BE CHECKED Check the printer cable installed HOW TO SOLVE Check correct installation and use stan dard IEEE1284 cable Check how TWAIN driver is installed Remove any other scanner driver Reboot after reinstallation of the TWAIN driver Check the printer port Parallel Check harness contact Check the IEEE1284 signal level Check the parallel port related items in the CMOS Setup As a printer port Select ECP among SPP Normal ECP and EPP modes increase print ing speed Check CN14 contact in Main PBA e If any signal level is defective replace Driver PBA 36 66 74 in Main PBA 0 8V to 2 4V TTL signal Otherwise replace Main PBA Check the USB signal level If USB signal level is defective replace Main PBA Defective image Quality Check shading profile Remake shading profile in the tech mode Check the gap between original and scan ner glass The gap above 0 5mm can cause a blurred image A
110. e same as User Mode MAINTENANCE CLEAN DRUM NEW DRUM NOTIFY TONER LOW ON OFF SWITCH TEST MODEM TEST SRAM TEST DRAM TEST ROM TEST FLASH ENGINE PATTERN TEST PATTERN1 7 QAPATTERN1 4 ALL 1 7 ALL CLEAR COUNT PASSWORD CRU PRINTS COUNT FLT SCAN COUNT ADF SCAN COUNT USED DRUM COUNT USED TONER COUNT TOTAL PAGE COUNT ANSWER ON CNG 1 4 ADJUST SHADING FLASH UPGRADE LOCAL REMOTE USER PROGRAM EMULATION BOOT PROGRAM PROGRAM DIAL TX CONFIRM The same as User Mode SCHEDULE JOB The same as User Mode PHONE BOOK The same as User Mode SYSTEM LIST USER MODE TX JOURNAL The same as User Mode RX JOURNAL The same as User Mode 4 6 Samsung Electronics Troubleshooting Function Item Content REPORTS MSG CONFIRM SCHEDULE JOB PHONE BOOK SYSTEM DATA TRANSMISSION RECEPTION HELP LIST PROTOCOL ERROR CODE 4 4 2 2 SCX 5112 SETUP 1 9 3 4 Function Item Content SYSTEM DATA CASSETTE PAPER LETTER 4 LEGAL BYPASS PAPER LETTER A4 LEGAL POWER SAVE ON OFF SELECT LANGUAGE ENG GER FRE ITA SPA POR DUT USB MODE FAST SLOW MAINTENANCE CLEAN DRUM MODEM TEST NEW DRUM SWITCH TEST SRAM TEST DRAM TEST ROM TEST FLASH ENGINE PATTERN TEST PATTERN1 7 QAPATTERN1 4 ALL CLEAR COUNT PASSWORD CRU PRINTS COUNT FLT SCAN COUNT ADF SCAN COUNT USED DRUM CO
111. e the Toner Cartridge DRUM WARNING Empty When the machine has encountered the drum life 14000 print pages Use little more change if REPLACE DRUM is marked in LCD window REPLACE DRUM When the machine has encountered the out of from lifr 15000 print pages Replace the Drum Cartridge 4 2 Samsung Electronics Troubleshooting Error Message Description Solution NO CARTRIDGE When the machine detected the toner cartridge has not been installed Install the Cartridge OPEN HEAT EROR Thermister does not connected to main board or contact point is not coupled tightly in power on BYPASS JAM When the machine detected the non feeding from Open the side Cover and clear the jam BYPASS Tray DUPLEX JAM When the machine detected the duplex jam in the Clear the jam middle of machine LINE BUSY The remote FAX didn t answer Try again Check thermister contact point Heating Camp amp Thermostat Heating Error During operation Temperatare does not go up Check thermister contact point amp Heating Lamp Scanner Locked Scanner is locked by locker Check locker Connect the Flat Cable Samsung Electronics 4 3 Troubleshooting 4 3 User Mode The table in the bellow explains the possible setting functions by user The details about the ways to use are explained in the user manual In the service manual the items are a
112. e used without Samsung s authorization Repair Manual CIRCUIT DESCRIPTION 3 8 2 AC INPUT STAGE AC Input power path is consist of the Fase F501 for AC current limit the Varistor TNR501 for by passing high Voltage Surge the discharge resistor R508 the AC Impalse Noise Filtering Circuit C501 LF501 C503 the Common Mode Grounding Circuit C504 C505 the 2 nd noise filter LF502 and the thermistor TH501 Wher power is turned on TH 501 limits Inlush Current by it s high resistanle and When it s temperature rise it s resistance become about Zero ohm 3 8 3 SMC SWITCHED MODE CONTROL The AC input voltage is rectified and filtered by BD552 and C507 to create the DC high voltage applied to the primary wind ing of T501 pin 1 is driven by the SMPS device U502 0502 auto starts and chops the DC voltage The U502 is PWM SMPS IC and has internally a SMC switched mode control IC and a MOSFET output stage The SMC IC has a Auto restart without a Power Supply for the IC and a Thermal Shutdown function and so on C509 R512 C510 D505 clamp leading edge voltage spikes caused by transformer leakage inductance The power secondary winding pim 11 12 is rectified and filtered by 0507 C552 L551 and C554 to create the 5V output voltage The bias winding pin 4 5 is rectified and filltered by D506 and C511 to create U502 bias voltage The secondary output 5V is regulated through the path of the voltage div
113. eang City F Rall CHK TITLE RL MFG ENGR CHK TL V1 2 De 81989 June 20 2001 0 CHK PEV Drawing NumBer Sheet af 1 2 3 4 5 7 8 Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization SCHEMATIC DIAGRAMS 4 9 Sensor Circuit Diagram 1 2 3 4 5 6 7 8 A E B E sv 4 35303 0350 enn p D E E Pen by im F TITLE Sige Mck_sensor MFG ENGR CHK Bet Loi amber 3 2001 QA REV Drawing Number Sheet of 6 8 Repair Manual This Document can not be used without Samsung s authorization Samsung Electronics SCHEMATIC DIAGRAMS 4 10 Toner_Rx Circuit Diagram COMPANY NAME MET hee hi d b Ust hi d 0 1 b pene foe 27 2001 SS ee 35303 0350 Repair Manual 25 Samsung Electronics This Document can not be used without Samsung s authorization SCHEMATIC DIAGRAMS 4 11 Toner_Tx Circuit Diagram 15 L 35303 0350 ng
114. ee screws and take out the LSU Cover Paper Exit Ass y see page 3 12 2 Unplug the two connectors Samsung Electronics 3 15 Disassembly and Reassembly 3 13 Cover Exit Rear 1 Before you remove the Cover Exit Rear you 3 Remove the one screw and Cover Exit Rear as should remove shown below Rear Cover see page 3 1 Scanner Ass y see page 3 2 Exit Ass y see page 3 12 Cover Paper Exit Ass y see page 3 12 SMPS see page 3 14 2 Remove the one screw and take out the Panel Connect MPF B16 Samsung Electronics 3 14 Main Frame Ass y 1 Before you removethe LSU you should remove Rear Cover see page 3 1 Scanner Ass y see page 3 2 Side Cover Ass y see page 3 9 Fuser see page 3 11 Exit Ass y see page 3 12 Cover Paper Exit Ass y see page 3 12 SMPS see page 3 14 LSU see page 3 15 2 Remove one screw in the Channel Base Frame from the bellow section of the Base Frame and then remove the rest of the five screws to dis semble the Dummy Base Frame the Cover Front and the Cam Jam Remove Dummy Base Frame Cam Jam Remove Front Cover 3 Remove the Locker Deve and then remove the one screw and the Cover Motor Bracket Lock Deve Samsung Electronics Disassembly and Reassembly 4 Unplug the all connectors 5 Remove the seven screws and take out the Main Frame Ass y Main Fra
115. ent 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 4 46 Samsung Electronics Exploded Views and Parts List Appendix information The following list shows different materials by model The material codes mentioned in themanual are subject to change without prior notice For the latest exact information see ITSELF SYSTEM http itself sec samsung co kr SCX 5312F XAA DESCRIPTION SEC CODE SCX 5112 XAA AS SCANNER ASS Y FRU JC81 00691A DESCRIPTION SEC CODE AS PLATEN ASS Y FRU JC81 00690A AS SCANNER ASS Y FRU JC81 00742A AS OPE COVER ASS Y FRU JC81 00689A AS PLATEN ASS Y FRU JC81 00745A PMO COVER OPE C JC72 00796A AS OPE COVER 55 Y FRU JC81 00748A PCT ONETOUCH PAPER JC72 00872A PMO COVER OPE C JC72 00944A PCT LCD WINDOW JC72 00870A PMO COVER DUMMY OPE M JC72 00858A PBA SUB LIU JC92 01355A SCX 5312F XEU DESCRIPTION SEC CODE AS SCANNER ASS Y FRU JC81 00691A PCT LCD WINDOW JC72 00945A SCX 5112 XEU DESCRIPTION SEC CODE AS PLATEN ASS Y FRU JC81 00690A AS SCANNER ASS Y FRU JC81 00742A AS OPE COVER 55 Y FRU JC81 00689A AS PLATEN ASS Y FRU JC81 00745A PMO COVER OPE C JC72 00796A
116. ep DIGITAL LASER MFP SCX 5312F SCX 5112 SERVICE MANUAL DIGITAL LASER MFP CONTENTS 1 Precautions 2 Specifications 3 Disassembly 4 Troubleshooting 5 Exploded Views and Parts List 6 Block Diagram 7 Connection Diagram ELECTRONICS Samsung Electronics Co Lid MAY 2002 Printed in Korea VERSION NO 1 02 CODE JC 0061A 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 This manual is stated provided for service description All rights reserved Any parts of the information in this manual are prohibited from free duplication use or translation without prior written approval except in cases allowed by the Copyright Act Specifications are subject to change without prior notice Samsung Electronics Digital Printing CS Group Copyright c 2002 5 1 Precautions Precautions Follow these safety ESD and servicing precautions to prevent personal injury and equipment damage 1 1 Safety Precautions 1 Be sure that all built in protective devices are place Restore any missing protective shields 2 Make sure there are no cabinet openings through which people particularly children might insert fingers or objects and contact dangerous voltages 3 When re installing chassis and assemblies be sure to restore all protec
117. essing for text photo mixed document 4 EDF data memory 2x4Kx16bits 128Kbits internal 5 LAT data memory 4x4Kx16bits 256Kbits external Scaling of input image 1 Scaling factor Horizontal direction 25 800 by 1 unit Vertical direction 25 100 by 1 unit 2 Scaling data memory 2x8Kx8bits 128Kbits internal Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization CIRCUIT DESCRIPTION Intelligent scan motor controller 1 Automatic acceleration deceleration uniform velocity 2 Data memory 256x16bits 4Kbits internal Auto Run Automatic CLK_LINE line processing start control and line scan start control signal generation 1 Available resynchronization of 2 signal 2 programmable e TG s period amp LINE s occurrence number Processed data output format in DTM Data Transfer Module 1 DMA mode Burst On demand mode 2 CDIP I F LINE SYNC PIXEL SYSNC PIXEL DATA 7 0 36 General Purpose Input Output 8 28 GPIO Black White reversion and Image Mirroring support DATA MEMORY ADDR BUS DATA BUS DMA Controller Jupiter Image Processor gt gt amp 0 Omo ProD CPU Scan Motor 1 CDS CLK Jupiter Driver AFE Control Signal 12bit ADC 12bit R G B Analog Signal Scanner DOCUMENT IMAGE
118. from the controller is received at U1 pin 5 RX DATA LCD drive signals are sent from U1 P2 x pin group P3 4 P3 6 pins e Machine status LED drive signals are sent from U1 LEDO LED7 RESONATOR 7 37 MHz ART2 J LCD 16 X 2 Line Connector MICOM Reset 28601 Key Matrix lt OPE BLOCK DIAGRAM gt Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization CIRCUIT DESCRIPTION 3 7 LIU PBA 3 7 1 SUMMARY LIU WIRE CONNECTS Main B D s MODEM AND LINE PARTS AND IMPEDANCE MATCHING DC RING DETEC TION PART and LINE SEIZURE DIALER 3 7 2 DC MATCHING PART Normal movement range of LIU is 12mA 9mA Adapting CTR21 standard the regulation limits to CURRENT flow through the terminal Therefore select EU PIT Option to connect necessary items then the current through LIU will not exceed 60mA CTR21 Standard Europe 12mA 60mA OTHER Standard U S 12 90 DC has a character to pass through the LINE And with Q1 VN2410 GATE section s LINE INPUT corrent and Q1 Source connection to R20 can be decided as follows VDCR VL1 ILINE X R20 Tip Ring CD Voltage ILINE Current flow VL1 Line Input Voltage VL1 VBD1 VCE Q2 VDS Q1 3 7 3 AC MATCHING PART Basic LIU s AC IMPEDANCE is 600 and uses R47 48 C36 to possibly control combined IMPEDANCE U S Usage A terminal IMPEDANCE 600W 30
119. ge insufficient printer memory means hard disk space problem rather than the RAM prob lem In this case provide more space for the hard disk Secure more space using the disk utilities program 2 The connection of the cable and printer port is not proper Check if the connection is properly done and if the parallel port in CMOS is rightly set up 3 As a printer port Select ECP or SPP among SPP Normal ECP and EPP modes increase printing speed SPP normal mode support 8 bit data transfer while ECP Mode transfer the 12 bit data 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 Samsung Electronics 4 45 Troubleshooting 4 6 6 3 Abnormal Printing 1 Set up the parallel port in the CMOS SETUP 2 Printer Driver Error 3 Error message from insufficient memory The printing job sometimes stops or due to insufficient vir tual memory but it actually comes from the insufficient space of the hard disk 1 Select SPP Normal or ECP LPT Port the among ECP EPP or SPP in the CMOS Setup 2 Check the printer in My Computer to see if the printer driver is compatible to the present driver or delete the old driver if defective a
120. have attempted to set up a sending opera tion with no document loaded Load a document and try again MEMORY FULL The memory has become full Either delete unnecessary documents or retransmit after more memory becomes available or split the transmission into more than one operation NO ANSWER The remote machine was not answered after all Try again the redial attempts Make sure the remote machine is OK NO NOT ASSIGNED The speed dial location you tried to use has no number assigned to it Dial the number manually with the key pad or assign the number NO PAPER The recording paper has run out The printer sys Load the recording paper in the paper ADD PAPER tem stops feeder OVERHEAT The printer part has overheated Your unit will automatically return to the standby mode when it cools down to nor mal operating temperature If failure per sists call service PAPER JAM 0 Recording paper has jammed in paper feeding Press STOP and clear the jam OPEN CLOSE DOOR area Recording paper is jammed in pick up unit PAPER JAM 1 2 OPEN CLOSE DOOR Recording paper has jammed inside the unit Recording paper has jammed in paper exit unit Clear the jam TONER LOW Toner may be low Toner may be unevenly distributed Remove the toner cartridge and shake it gently to evenly distribute the toner Then replace the toner cartridge TONER EMPTY When the machine has encountered the Toner Replac
121. he OPC drum sur face is fixed to the paper FLASH UPGRADE It is Firmware Upgrade function and has two methods Local and Remote More information can be found in the firmware upgrade items ADJUST SHADING The function is to control to get the optimum scan quality by the specific character of the CCD Charge Cou pled Device If the copy image quality is unsatisfied perform the function to check the condition of the print out for checking whether or not having CCD trouble Method 1 Select the ADJUST SHADING at the TECH MODE 2 Push the SET UP button then an image will be scanned 3 After the scan CCD SHADING PROFILE will be print out 4 If the printed image is different to the image the CCD is defect SHADING VALUE NE GRAY SHADING NOTICE When you test CCD make sure that the cover is closed ANSWER ON CNG The function is to control the CNG TONE cognition times for entering receiving mode from the AUTO MODE or ANS FAX MODE Samsung Electronics 4 9 Troubleshooting CLEAR COUNT This function erases information of history such as replacement times of Developing part and OPC drum total printing pages scan times and etc The items are in the below section of the System Data List printed at TECH MODE PASSWOEED 1934 Current Drum Page Count cannot be erased It is possible to erase at NEW DRUM function USER MODE MINTENANCE NEW DRUM FIRMWARE VERSION E 1
122. he fuse Shortage between 5V and GND or between 24V and GND Put in the Toner cartridge cartridge is in the set YES Remove the shortage or replace the board Detect failure due to the board which detects side cover open or switch error gt Replace the board or switch Samsung Electronics Fuser Error Measure the resistance at the both ends of AC Line with covers open Less than 10W NO Troubleshooting Thermostat is open due to the heat etc gt Replace the thermostat Remove the covers AC is being supplied The voltage of pin 60 of U36 CPU on the Main PBA is about 2 65V when printing END Samsung Electronics Re assemble the top cover and close it The voltage of pin 6 of U5 on the Main PBA is about 3 2V If not check the CN4 on the power board Thermistor connecting point or engine board defect gt Repair replace the component board 4 37 Troubleshooting Paper Jam Mis Feeding Sounds the solenoid on when starts print ps Does the paper move Does the paper move more than 100mm Feeder sensor is assembled reverse Switch them 4 38 NO The Main PBA board defected NO gt Replace boards The solenoid defected gt Replace
123. he transfer roller in use has been expired Check the transfer voltage and readjust if different Recycled product Poor appearance of the developer Unclean and rough printouts Bad background in the image 1 Poor appearance of the devel oper 1 Check the damage to label and whether different materials are used 2 Check the appearance of parts of the developer such as frame hopper 2 Unclean and rough printouts 1 Check whether foreign sub stance or toner are stuck to the terminal contact point of the developer 2 Check whether the state of the terminal assembly is normal 1 In case of 1 1 If there is an evidence of disassembling the developer 2 1 materials other than normal parts of the developer are added or substituted 2 In case of 2 If there are any abnormals in connection with the situation of 1 1 It occurs when the developer is recy cled over 2 times 2 If toner nearly being expired are col lected to use it is judged as the recycled developer Samsung Electronics 4 43 Troubleshooting Fault Signs Cause amp Check Solution Ghost amp Image Contamination printed image is too light or dark or partially contami nated black Totally contaminat edblack Black image printed out 1 The printed image is too light or dark or partially contaminated black 1 Check whether foreign sub stance or tone
124. http www fapo com ieee1284 html In other words it supports both compatibility mode basic print data transmitting method the nibble mode 4bit data supports data uploading to PC and ECP enhanced capabilities port 8bits data high speed two way data transmission with Compatibility mode is generally referred to as the Centronics mode and this is the protocol used by most PC to transmit data to the printer ECP mode is an improved protocol for the communication between PC and peripherals such as printer and scanner and it provides high speed two way data communication ECP mode provides two cycles in the two way data transmission data cycle and command cycle The command cycle has two formats Run Length Count Channel Addressing RLE Run Length Count has high compression rate 64x and it allows real time data compression that it is useful for the printer and scanner that need to transmit large raster image that has a series of same data Channel Addressing was designed to address multiple devices with single structure For example like this system when the fax printer scanner have one structure the parallel port can be used for other purposes while the printer image is being processed This system uses RLE for high speed data transmission PC control signals and data send receive tasks such as PC data printing high speed uploading of scanned data to PC upload download of the fax data to send or receive and monitoring the system contr
125. ichis comprised of Regulation circuit The output voltage is determined by the DUTY width Q203 switches with PWM DUTY cycle to fluctuate the output by fluctuating the OP AMP non inverting end VREF electric potential and the maximum is output at 0 and the minimum at 100 Transfer output unit is THV EA L enable When THV EA is L 0302 turns on and the VCE electric potential of Q302 will be formed and sends IB to TRANS auxil iary wire through R311 C305 and VR302 via current restricting resistance R314 and eventually Q303 will turn on When the current is accepted to Q303 03035 Ic increases to the current proportional to time through the T301 primary coil and when it reaches the limit of Q303 it will not retain the on state but willtum to As Q303 turns off TRANS N1 will have counter electromotive force discharge energy to the secondary coil send current to load and output THV voltage through the high voltage output enable which is comprised of Regulation circuit t t e l c205 D204 D205 0207 Tpzkvesprdh skv skv MAIS ji 6 1 C207 3KV470pF R216 R218 SBR306 MGR1 2W100KF R217 R212 C203 0203 20201 20202 R214 C204 R215 680K 472 1N4148 565 705V 22K 3332 390 5 SBR207 7 19 0301 5v 1N4148 V T301 C307 D304 3KW470pF 4KV gt 29 paos L oso 588 V C KVeSpF T 4KV T
126. ide by R553 R556 U503 switching PC252 the bias voltage of U502 U503 PWM duty cycle T501 secondary voltage C508 filters internal pin determines the auto restart frequency and togeth er with R506 compensates the control loop U552 of the secondary stage 12Vis the Low Power loss Regulator with built in overcurrent protection function 3 8 4 FIXED TEMPERATURE CONTROL 3 8 4 1 Fixed Lamp Control Circui AC Power Live AC Neutral Logic Unit Fuser On R505 SMPS Unit CON502 DC Power lt Fixed Lamp Control Circuit gt Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization CIRCUIT DESCRIPTION 3 8 4 2 The Concept of Fixed Lamp Control For fixed lamp control the logic unit fuser on control signal and SMPS unit DC power must be supplied This circuit turns on only when fuser on sends the signal and the DC power is supplied The following explains how the fixed lamp control circuit works logic unit fuser on sends trigger current to triac driver U501 LED then the infrared ray is detected by U501 photo detector Next U501 triac is conducted The conducted current sends trigger input to triac THY501 gate At this point THY501 is conducted and power is sup plied to fixed lamp Lamp is turned and temperature rises As this fixed lamp control circuit uses the AC voltage and are repeated as the power supp
127. ight be out of its location gt Locate the roller into its place Replace the toner cartridge 4 22 This could occurs when he power of LSU is low or the density is low due to the obstacles on the window gt Replace LSU or clean the window Samsung Electronics Black All black in printing area YES video data line to LSU transit to High Low when Replace LSU Troubleshooting Check the path among video controller engine board HVPS LSU for the shortage or open gt Repair or replace the boards gt Repair or replace HVPS Is charge NO voltage supplied from HVPS Is the NO Hsync signal received in LSU YES Charge part s contact is bad gt Repair or replace toner cartridge Samsung Electronics gt Replace LSU 4 23 Troubleshooting Vertical White Line Band Ligita Printer Ligita Printer Digita Printer Digita Printer Printer White line missing definitely NO YES v Check if the printout is still has the same problem even right after passed through the transfer roller NO Dirt of dust stuck onto the window of internal lens of LSU gt Clean it or replace LSU Preventive obstacles through the path between OPC of developer and LSU prevent the path gt Remove the obstacles 4 24 To
128. is Document can not be used without Samsung s authorization CIRCUIT DESCRIPTION DRAMA4 DRAM Address Bus 4 8 mA w Je mms __ 7 mam o 7 1 _ Cw we pw omm FON iA pw vow omm ates POR EA o fo DRAM Address Bus 10 Cw ome o 7 w w e wem o soso POR E vw __ we wes ROW up soma 5 wem ROM Chip Seect3 nROMRD ROM or 10 Read 8 mA nROMWR fo ROM or IO Write 8 mA ADDR2 Address 2 for ROM PHOB8 8 mA ss ve La ee tras 5 er POR EA Fm ww m ww _ w w se Fe wee trae aus rR POR E Samsung Electronics This Document can not be used without Samsung s authorization Repair Manual CIRCUIT DESCRIPTION m eme or on eme o m omm o es me ROM FO a 237 FILTER natge Pump Gur POBA Capacitor is connected CPU Test Mode PHILD50 ST Tied to Gnd Reset Input PHIL ST 238 CPUTEST nRSTOUT EM L Reset Output 8
129. it The pick up unit is assembled wrong gt Re assemble or replace the unit Too many papers in the feeder YES The sensor and Main PBA defected gt Repair replace Reduce the amount and re test Paper guides Take out the paper fit the paper width and re insert YES lt Pull out the 2 Paper end curled extender extender pulled out lt Recommendation gt Use the MPF for the thick paper such as envelope Use the recommended and quality paper and cardstock Samsung Electronics Troubleshooting Paper Jam Jam 1 Paper Paper actuator NO Check the actuator exists and its stopped before stopped before paper exit sensor operation and around the Main PBA the OPC the fuser works OK Replace Check the LSU and Check the roller if it has the defect Is the paper NO and ribs of fuser replace it rolled around the multiple pages are in place and presseure remove burrs if roller any YES gt Remove the factors of jam Remove the fuser remove the paper and replace the pressure roller if necessary Remove any factors The paper Severe skew came out through Check the input path when feeding between fuser and to the f
130. it Diagram 1 2 3 4 5 7 8 y2 5 e 3 CO74HC 14Mx U2 1 CO74HC 14x U2 2 11 10 14 CO74HC 14Mx 35303 0550 E E Be 5 2 245 A 4 A OPE RST AA 2 pos E C831 C87 Suc tax 4 4 4 4 4 T T PCM A 12 1 jeur H R25 R21 R23 Re R10 212 R14 RIG 18V me 208 200 260 200 200 200 200 208 7 01 02 a2 a4 05 305 KSA1182 Y KSA1182 Y KSA1182 Y KSA1182 Y KSA1182 Y KSA1182 Y KSA1182 Y GNDS 1 Md id KO 3 KY 3 3 YX 3 IONER SAVE _ ERROR PAPER QUT CARTRIDGE REPLADEPER JAM JAMO 2 R37 1582 ui SLS NNUR202 TS SLS NNUR202TS SLS NNUR204 TS SLS NNUR20 1S 5 SLS NNUR202 TS SLS NNUR203 TS Pv y Q S Q 00 2 2 2 2 E 8 g 3 3 OPE 0 lt INT 8 ER B 21 44 RXD TMRO 0 7 N
131. l turn 4 Paper Exit Sensing The system detects the paper going out of the set with the exit sensor assembled to the actuator attached to the frame If CPU does not turn back high a while after the paper hits the exit sensor CPU detects this and inform as Paper Jam2 red LEDs on the OP panel will turn on 3 5 3 LSU CIRCUIT 1 Polygon Motor Unit actuated by 24V The polygon motor inside LSU rotates by the PMOTOR signal When it reaches the motor constant velocity section through the initial transient transient response section it sends the nLREADY signal to the CPU The clock pin is the pin that receives clock of the required frequency when LSU uses external CLK as the motor rotational frequency Currently the exter nal clock circuit is located in the HVPS and 1686Hz 6 9083MHz crystal frequency 4096 74HC4060N IC is used as the rotational frequency of the polygon motor 2 Laser Unit actuated by 5V After laser is turned on by nLD_ON signal it is reflected by 6 mirrors polygon mirror attached to the polygon motor and performs scan in horizontal way When the laser beam hits the corner of the polygon mirror it generates nHSYNC signal pulse and the CPU forms the left margin of the image using this signal horizontal synchronous signal o Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization CIRCUIT DESCRIPTION 3 5 4 FAN
132. lace it 4 30 When gray pattern printing irregular density persists PTL lamp works OK Any obstacles on the PTL lamp transfer charge developing voltage drops while printing YES NO Defective agitator in the toner supplying part of developer gt Replace the developer Check if the guide deve spring works OK and repair repalce Check high voltage output and repair replace terminals HVPS Replace lamp Bad images around the no image area YES NO Irregularity of toner supply from developer gt Replace developer Clean the window of PTL Light distortion due to the mirror ruined or LSU s diffused reflection gt Replace LSU Samsung Electronics Troubleshooting White Spot Digital Fririter 2i Jal rinter Di ita Printer Digi a Printer Digital rn er Too high voltage supplied due to the setting error of transfer voltage gt Adjust replace HVPS Transfer voltage is normal 15 it regular interval of 95mm Obstacles stuck on OPC s D R in developing unit has surface the defect gt Clean the OPC and gt Replace the developer machine or replace developer When putting in out the developer scratch is made gt Replace the developer Samsung Electronics 4 31 Troubleshooting T
133. ltage THV Each high voltage supply shows the voltage required in each digital picture process 3 5 7 2 Digital Picture Process Digital picture developing method is widely used by copy machine laser beam printer and fax paper The process is comprised of electrification exposure develop transfer and fixing First in the electrification process retain constant charge at approx 900V for the electric potential on the OPC surface by electrifying OPC drum at approx 1 4KV through the electrification roller The electrified surface of OPC is exposed responding to the video data by the LSU that received print command due to rota tion The unexposed non video section will retain the original electric potential of 900V but the electric potential of the image area exposed by LSU will be approx 180V that it will form the electrostatic latent image The surface of the photo conduc tive drum where the electrostatic latent image is formed reaches the developer as the drum rotates Then the electrostatic latent image formed on the OPC drum is developed by the toner supplied to the developing roller by supplying roller and it is transformed into visible image It is the process to change the afterimage on the OPC drum surface formed by LSU into vis ible image by the toner particles While the supply roller energized with 450V by HVPS and the developer roller energized with 300V rotate in the same Repair Manual Samsung Electronics This Docu
134. ly it used two way triac THY501 which has advantage over one way SCR considering the price size and reliability Triac s gate can be triggered by either forward or reverse signal Once triac is turned on it will not be controlled by gate sig nal but will be continuously on until the current between major terminals decreases below the holding current In other words youcannot turn it offwith reverse signal unlike SCR This property is called current voltage threshold rise rate commutation dv dt In AC power control application triac has to turn off conduction in each zero crossing or switch it twice in each cycle This switching operation is called commutation It is possible to turn off the triac at the end of half cycle by eliminating the gate signal when the load cur rent IL is gained at the level equal to or lower than holding current When triac commutes off line the direction of the voltage of the both ends of triac will be reversed and increase up to the maximum value of line voltage VAC At this point the width of rise rate will be determined by dv dt and overshoot voltage by the circuit When triac commutes off line the volt age of both ends of triac will have the same voltage as the line voltage Inductive Inductive Circuit Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization 4 Schematic Diagrams SCHEMATIC DIAG
135. me Ass y 7 3 17 Disassembly and Reassembly 3 15 MP Ass y 1 Before you remove the MP Ass y you should 4 remove the three screws remove Rear Cover see page 3 1 Shield Main Upper see page 3 2 Side Cover Ass y see page 3 9 2 Unplug the two connectors 5 Release the SMPS fit Pull the MP Ass y upward 3 Remove the one screw and take out the Dummy and remove it Cover Samsung Electronics 3 16 Feed Ass y 1 Before you remove the Feed Ass y you should remove Rear Cover see page 3 1 Scanner Ass y see page 3 2 Side Cover Ass y see page 3 9 Exit Ass y see page 3 12 Cover Paper Exit Ass y see page 3 12 LSU see page 3 15 Main Frame Ass y see page 3 17 2 Remove the three screws Samsung Electronics Disassembly and Reassembly 3 Pull the Feed Ass y upward and remove it Feed Ass y 3 19 Disassembly and Reassembly 3 17 Pick Up Ass y 1 Before you remove the Pick Up Ass y you should 4 Remove the four screws and take out the Pick Up remove Ass y as shown below Rear Cover see page 3 1 Shield Main Upper see page 3 2 Drive Ass y see page 3 13 2 Unplug the three connectors Guide Paper Out _ 3 Remove the two screws and take out the 4 sette Rail Cassette Rail 4 Samsung Electronics Disassembly
136. ment can not be used without Samsung s authorization CIRCUIT DESCRIPTION BLADE SUPPLY LSU SUPPLY ROLLER DEVELOPER ROLLER HEAT ROLLER DIRECTION OF PAPER ELECTRIFICATION ROLLER THV PRESSURE ROLLER TRANSFER ROLLER direction it keeps the toner particles between two rollers supplied to OPC drum in negative state by the friction between two rollers The toner supplied to the developer roller is biased to bias electric potential by the developer roller and transferred to the developing area After toner is attached to the developer roller it will move to the exposed high electric potential surface 180V rather than to the unexposed low electric potential surface 900V of the developer roller and OPC drum Eventually the toner will not settle in the low electric potential surface to form the visible image Later the OPC drum continues to rotate and reaches to transfer location in order to accomplish the transfer process This process transfers the toner on the transfer roller to the printing paper by the transfer roller The toner attached to the OPC drum will be energized to hundreds to thousands of the transfer voltage by HVPS The electrostatic force of the transfer roller generated has higher adhesiveness than the toner OPC drum and thus it moves to the surface of the paper passing through the transfer roller The toner transferred to the paper with weak electrosta
137. n the Out tray 2 Does it curl while coming out Solution 1 Load recommended quantity of papers 2 Open the Cover Front and check whether roller or spring which are related to paper out is not out of posi tion If so re locate or replace Clutch error 1 Check the spring of solenoid 2 Check the armature assembly cushion 3 Electrical check 1 Check whether the spring is expanded or not 2 Check armature is well installed It may be unstable assemble 3 Remove the Main PBA High volt 1 Check the terminal output voltage 1 Remove the Toner cartridge and open the cover and age error press cover open switch lever and measure the voltage with high voltage probe and sending printing data If the voltage is normal change the toner cartridge 2 Check HVPS 2 Disassemble the left side cover and check HV of the sol der side of HVPS and change it Feeding Does the Plate knockup prevent the paper MPF obstacles loading Turn the power off and on Open and close the Side cover to return to the original state Cassette Adjust Guide to fit the paper width Skew Is the Guide adjust set to the paper Fit the paper width using the Guide adjust width Stacking 1 Took out the Stacker extender to support long 1 Use extender as per the paper length papers 2 The Face up stacker normally can hold 100 pages when 2 Stacked too many papers more than Stacker using 75g m2 however stacking capacity can be l
138. nd reinstall the new driver 3 Delete the unnecessary files to secure enough space of the hard disk and start printing job again 4 6 6 4 SPOOL Error 1 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 dam aged 5 When some files related to OS are damaged or virus infected 6 Memory is less than suggested one 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 pos sible 4 Delete the printer driver completely and reinstall it 5 After rebooting the computer check for viruses restore the damaged files and reinstall the program to do the printing job 6 Add up enough memory to the PC Woundodalete the data the eno Pow o deiete the 474744747676 599507920605 In the spool manager the installed drivers and the list of documents waiting to be printed 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 docum
139. ner material might be stuck to blade in the developer inside and it prevents toner supply gt Replace the developer Check both if the toner cartridge s counter is over its guaranty and amount of the toner material gt Replace the toner cartridge The ribs in fuser or toner on the roller may invoke the image problem gt Replace the fuser cover or the defective part The image is originally black or the black part is far close to the top gt Use the pattern which has the image below bigger than 10mm from the top Samsung Electronics Dark Image Dark selected via RCP Change to Normal and test NO Same at Normal Works cor NO END with 300V of Bias voltage YES Works correctly after NO Repair or replace the defective component replaced LSU YES The power of LSU is set high or internal problem gt Replace LSU or adjust volume Samsung Electronics Toner over supply due to the adjustment fault of metering blade in developer gt Replace developer Troubleshooting 4 25 Troubleshooting Background Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Adjust voltage or replace HVPS Repair or replace after checking the terminals contacts 4 26 Recommended paper used Print 2
140. o m 25 SZ a 2 43 pe ae 2 4 24 mL RESET 4 4 2444 ET _ lt nue 14 R120 R121 48 2 a uo 108 uen 2140 70E 2 1ngRD ______ 67 S BYTE f avte 3 14 lene 11 sepe o a F 13 46 2 VSB z 41 NCB vsst 57 12 Voca vesz L l vsse w 26l 28 048 1 5 A13 vec 7 __ 25 26 28 eno iip oe ausy 5 eno Spee nF WR RESET nF UR RESET AN2SFBOOR TOEC AN2SF BOOB nF_RESET 06 AC2 20 5091411 vec 0 8 3121 EE ven D C132 M4 EMUL_L gt 15 EMUL_H gt 100nF m soc x wg S ag 013 OGND 470 uF N amp ps s 612 us 5 14 16V 752084948 7147 3 ME 09 122 2 E AM DR NWR F LASH O gt nF E gt 57 1 pac 05 820 D4 nWR gt 1 ud S 1 4 Dt N AN Reco uM 5 a2 E 1K NZ ay ver R103 lt CR 203216 AK wa 2 evre X GND i E bo zu ks oFLASH CS DGND 251 28 t 28 auey x 2 29 800 70 29 8008 70 jano sia COMPANY NAME F_R
141. ol signal and overall system from PC are all processed through this part PPD 7 0 BUSY nSTROBE nACK Compatibility Hardware Handshaking Timing Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization CIRCUIT DESCRIPTION 1 2 5 6 nSTROBE BUSY PPD 7 0 nAUTOFD COMMAND BYTE lt ECP Hardware Handshaking Timing forward gt 1 The host places data on the data lines and indicates a data cycle by setting nAUTOFD 2 Host asserts nSTROBE low to indicate valid data 3 Peripheral acknowledges host by setting BUSY high 4 Host sets nSTROBE high This is the edge that should be used to clock the data into the Peripheral 5 Peripheral sets BUSY low to indicate that it is ready for the next byte 6 The cycle repeats but this time it is a command cycle because nAUTOFD is low 12 3 4 5 6 7 8 nACK nAUTOFD PPD 7 0 BUSY nINIT PE ECP Hardware Handshaking Timing forward 1 The host request a reverse channel transfer by setting nINIT low 2 The peripheral signals that it is OK to proceed by setting PE low 3 The peripheral places data on the data lines and indicates a data cycle by setting BUSY high 4 Peripheral asserts nACK low to indicate valid data 5 Host acknow ledges by setting nAUTOFD high 6 Peripheral sets nACK high This is the edge that should be used to clock the
142. orarily improve the print quality by redis tributing the toner Shake the toner cartridge however you should replace the toner cartridge to solve the problem thoroughly Service for Judgement of Inferior Expendables and the Standard of Guarantee Please refer to User s Manual or Instructions on Fax Printer Expendables SVC for the judgement of inferior expendables and the standard of guarantee besides this service manual Samsung Electronics 4 41 Troubleshooting 4 6 5 1 Signs and Measures at Poor toner cartridge Fault Signs Cause amp Check Solution Light image and partially blank image The life is ended printed image is light or unclean and untidy Some part of the image is not printed Periodically a noise as tick tick occurs 1 If the image is light or unclean and untidy printed image Shake the developer and then recheck 1 NG Check the weight of the developer 2 OK Lack of toner so the life 15 nearly closed 2 Some part of image is not printed Shake the developer and then recheck 1 NG Check the weight of the developer and clean the LSU window with a cotton swab then recheck 2 OK Lack of toner so the life is nearly closed 3 Periodically a noise as tick tick occurs Measure the cycle and the weight of the developer 4 White vertical stripes on the whole screen or partly Check the weight of the developer 1 All of 1 2
143. owered can hold depending on the type of papers Engine Check Harness 7 Refer to troubleshooring ENGINE ERROR Error Main PBA to LSU Document Document is not picked up in ADF 1 Check document is well stocked in ADF Jam 2 Check whether document was been fastened together by staple or clip 3 Load recommended quantity of papers Document is stopped after it has fed into the ADF 1 Check whether the Reg sensor is working or not 2 Check whether the Feed Roller is working or not Does it curl while coming out 1 Check the Open Cover whether there are bosses 2 Check the ADF ass y is well assemble Samsung Electronics 4 35 Troubleshooting No Power LCD NO display LED Off Plug in the NO power cord The power voltage supplying is the power cord Check the voltage first and plug the same as rating YES The fan revolves when NO gt Supply the power as the rating Connections powered on LEDs blink once when powered The connection error between controller board and panel board or malfunction of boards gt Replace the boards Shortage on the OPE panel board Repair replace the board 4 36 on board are OK Fuse of SMPS if open Re connect firmly and re test Replace t
144. r Feed Direction FISO Front In Side Out Paper Capacity Input Cassette 550 Sheets By Pass Tray 100 Sheets based on 75g B gt 201 Paper Capacity Output Face Down 250 Sheets Effective Print Width 203 1mm 8 inch 2 3 Facsimile Specification SCX 5312F Only Item Description Standard Recommendation ITU T Group3 ITU International Telecommunications Union Application Circuit PSTN or behind PABX PSTN Public Switched Telephone Network PABX Private Automatic Branch Exchange Data coding Compression MH MR MMR JP EG Transmission Modem speed 33600 14400 12000 9600 7200 4800 2400 bps Transmission Speed Approximately 3 sec 33 600 bps Effective Scanning Width 8 2 inches 208 mm Halftone 256 Levels Paper Capacity Input ADF Automatic Document Feeder 30Sheets 75g B gt FAX Mode Standard Fine Super Fine Halftone Memory 4MB 2 2 Samsung Electronics 2 4 Scanner Specification Specification Item Description Type Flatbed with ADF Speed Mono 1 25 msec line Color 5 msec line Device Color CCD Charge Coupled Device Module Interface IEEE1284 ECP Support USB without HUB Mode Compatibility TWAIN Standard WIA Optical Resolution H X V 600 X 600 dpi Interpolation Resolution Max 4800 dpi Halftone 256 Levels Effective Scan width 8 2 inches 208 mm 2 5 Copy Specification Item Description Mode B W
145. r are stuck to the terminal point of contact of the developer 2 Check whether the terminal assembly is normal 2 Totally contaminated black Black image printed out 1 Check whether foreign sub stances are stuck to the termi nal point of contact of the developer and the state of assembly Especially check the charged roller terminal 1 All of 1 2 above 1 Remove toner and foreign substances adhered to the contact point of the developer 2 The contact point of the unit facing that of the developer also must be cleaned 3 If the terminal assembly is unsafe Fully stick the terminal to or reassemble it after disassembling Disassemble the side plate and push the terminal to be stuck then reassem ble it 2 In case of 2 It is a phenomenon when the OPC drum of the developer is not electrically charged Clean the terminals of the charged roller then recheck it 4 44 Samsung Electronics Troubleshooting 4 6 6 The cause and solutions of bad environment of the software 4 6 6 1 The printer is not working 1 Description While Power turned on the printer is not working in the printing mode Check and Cause Solution 1 Check if the PC and the printer is properly connected and the toner cartridge installed 2 Printing is nor working in the Windows 3 Check if the printer cable is directly connected to peripheral devices 1 Replace the printer cable
146. rembling at the End When OHP Printing Recommended OHP film used Inserted over than 10 films into the MPF Use the recommended film When OHP printing does the fan temporarily stops and revolves When multi page OHP printng less than 10 films are guranteed Reduce the number of films and re insert after paper check LED if off Other parts are touching the fan and prevents it from revolution gt Check and repair 4 32 Use the recommended film Samsung Electronics Poor Fusing Grade After printing completed any error related fuser Both ends of thermostat open YES v Replace thermostat and re test v Replace the control component on Main Check any contact problem in thermistor and repair Samsung Electronics The machine placed under the severe low tempera ture for a long time Place the machine at normal temperature and re test PBA While printing the voltage of pin 60 of U36 CPU on Main PBA is 2 1V 2 6 Troubleshooting Thermistor s NO contact is OK Open the top cover When black width is 3 0 3 5mm Re assemble thermistor printing is the fuser NIP Check if the hardness of P R and spring force is OK hardness 24 degree spring
147. right c 2001 11 BLOCK DIAGRAM 1 Block Diagram 1 1 6 2 3NOHd TVN83LX3 ATLES XIS 1uVd 39V 3NOHd WN H31X3 ONILW H3dVd 3NOHd 1X3 39VJ3U3 1NI XY XL 009 009 YSINYOASNVYL WAGON 2 WS H3409 dW3d 0334 HOSN3S H3dvd dW XITANA GION31OS 1 XH XL H3NOL al Aaa NVA YOLSINY SHL 51 A z HOLON HOLON JOSN4 SAVZ AZL NVEH AG SdAH SdINS A A AlddNs H H Aaa W 1 vaL X dv vaL X d9 Vie X dE Vie X dc sdqyg ee 6 20 7 049 IVNH3LX3 M asn J18V5 5 YNG Luvd 41 095 YLNO 100 1804 dec FINGOW 895 NOILdO 192 YOLON 105592014 eDeui 419 8146931 8166 YOLOWN 78219991 asn 3 1 nad YLNO VIAG 48 SHOVO AHOIN3IN LYVN INQLZINHV 9494 LSV4 10d 901898 8 18
148. rization CIRCUIT DESCRIPTION 3 3 Scanner 3 3 1 SUMMARY This flat bed type device to read manuscripts has 600dpi CCD as an image sensor There is one optical sensor for detecting CCD home position and Scan end position The home position is detected by a optical sensor which is attached to the CCD Module The Scan end position is calculated by number of motor step CCD Charge Coupled Device improves productivity and allows a compact design This machine uses a color CCD Minimum Scan Line Time for One Color 5mS Light Source Power 12V Maximum Pixel frequency 6 MHz Effective Sensor Element 5340 X 3 Clamp Level 0 7 0 8V Bright Output MIN 0 8V R_LED G_LED mU ETE AIN PI TG B LED REFT 1 2 p BE s AFE Sensor 12 bit A D converter Interface Shading Acquisition Vertical Shading Decimation Correction Gamma SRAM A 15 0 SRAM D 15 0 Correction SRAM nRD SRAM nWR Image Processing Enlarge ment Mo dule Reduction 4096 x16 2 line IRQ Interrupt Vp eak Control Control TX A B nTX A B TX EN1 EN2 CPU Module Register DMA Interface nCS nRD nWR A 5 0 0 15 0 nXDREQ nXDACK Block Diagram Repair Manual Samsung Electronics This Document can not be used without Samsung s authorization CIRCUIT DESCRIPTION 3 3 2 KEY FEATURES Overview 1 0 5m C MOS process TLM 208 PIN QFP STD65 li
149. rtain 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 compo nents The techniques outlined below should be fol lowed to help reduce the incidence of component damage caused by static electricity CAUTION Be sure no power is applied to the chassis or circuit and observe all other safety pre cautions Immediately before handling a semiconductor component or semiconductor equipped assem bly drain off any electrostatic charge on your body by touching a known earth ground Alterna tively employ a commercially available wrist strap device which should be removed for your personal safety reasons prior to applying power to the unit under test After removing an electrical assembly equipped with ESDs place the assembly on a conductive surface such as aluminum or copper foil or con ductive foam to prevent electrostatic charge buildup in the vicinity of the assembly Use only a grounded tip soldering iron to solder or desolder ESDs Use only an anti static solder removal device Some solder removal devices not classified as anti static can generate electrical charges suffi cient to damage ESDs Do not use Freon propelled chemicals When sprayed these can generate electrical charges sufficient
150. s force 3 Kg The paper used is too thick or contains too much cotton in it gt Re test with the recommended paper 4 33 Troubleshooting 4 6 4 Malfunction Error Status Check Solution No power 1 Check power is supplying 1 If supplying power differs from machine s power rat ing replace the machine 2 Check fuse F1 open 2 Replace it Fuser Error 1 Thermostat open 1 Detach AC connector and measure the resistane between pin 1 and 2 If it is megohm thermostat is open Replace it 2 AC wire open 2 Check bad connector contact or wire is cut 3 Thermistor wire open 3 Check thermistor wire and its connection 4 Main PBA 4 Replace Main PBA Cover open 1 When close Side cover check the lever is 1 Open Side cover and press the lever with pen If pressed Controller detects cover close there is some mechan 2 Micro switch s contact ical trouble in Side cover and lever s assembly If not 3 CPU and related circuit so there is electrical problem Jam 0 Check where Jam 0 happens 1 Paper is not picked up 1 Check whether solenoid is working or not by using Engine test mode 2 Paper is located in feed sensor 2 Check feed sensor malfunction 3 Happened when inserting specific papers such Re try inserting a fewer papers as envelope into the MPF Multipurpose Paper fan the papers and align Feeder out the loaded papers and insert them reverse direction 4
151. ss y see page 3 2 2 Remove four screws and then untile the harness from the Exit Upper Unplug four connectors and unlatch the Dummy Base Frame as shown below 3 9 Cover Paper Exit Ass y 1 Before you remove the Cover Paper Exit Ass y 2 Remove two screws and Cover Paper Exit Ass y you should remove as shown below Rear Cover see page 3 1 Scanner Ass y see page3 2 Cover Paper Exit Ass y Samsung Electronics Disassembly and Reassembly 3 10 Drive Ass y 1 Before you remove the Drive Ass y you should 3 Remove the one screw and take out the Fan and remove Dust Fan Rear Cover see page 3 1 Shield Main Upper see page 3 2 2 Unplug the two connectors Main Motor 9pin Duplex Solenoid 2pin Fan Dust Fan 4 Remove the five screws and take out the Drive 5 Samsung Electronics 3 13 Disassembly and Reassembly 3 11 SMPS 1 Before youremove the LSU you should remove Rear Cover see page 3 1 Scanner Ass y see page 3 2 Cover Paper Exit Ass y see page 3 12 2 Remove three screws and take out the Shield SMPS Upper 3 14 3 Unplug the all connectors 4 Remove the SMPS as shown below Samsung Electronics Disassembly Reassembly 3 12 LSU Laser Scaning Unit 1 Before youremove the LSU you should remove Rear Cover see page 3 1 Scanner Ass y see page 3 2 3 Remove the thr
152. stem when the software heat lamp control does not run normal When the ther mistor temperature goes up to 210 1 pin s level LM393 will turn low to turn the signal to high forcefully shuts off Q3 In other words LM393 shuts off the heat lamp forcefully 3 5 2 PAPER SENSING CIRCUIT 1 Cover Open Sensing Cover Open Sensor is located on the right rear side of the printer In case the right cover is open it shuts 5V LSU laser unit and 24V polygon motor of fixer LSU and HVPS that are supplied to each unit It detects the cover opening through CPU In this case the red LED of the OP Panel LED will turn on 2 Paper Empty Sensing The paper empty sensor photo interrupter located inside bottom of the bin cassette detects paper with the actuator con nected to it and informs the CPU of whether there is paper When there is no paper in the cassette the red LED of the OP panel LED will turn on to tell the user to fill the cassette with papers 3 Paper Feeding When the paper is fed into the set and passes through the actuator of the feed sensor unit transistor inside the photo interrupter will turn on nFEED signal will turn low and inform CPU that the paper is currently fed into the sys tem CPU detects this signal and sprays video data after certain time related to paper adjustment If the paper does not hit the feed sensor within certain time CPU detects this and informs as Paper red LED on the OP panel wil
153. te Current Firmware version and Emulation Version are displayed on Current version window 3 Search Firmware file to update with Browse Icon 4 Click Update icon firmware file is transmitted to Printer automatically and printer is initialized when it fin ished 5 Click Refresh icon and check what is updated 24 1200 Samsung Electronics Troubleshooting DOS Command mode This method is just for Parallel Port Connect to PC with Parallel cable and enter DOS Command to upgrade the Firmware lt Method gt a The first of all need the files down bat down_com bin fprt exe and Rom File file name for upgrade Save the files in the same folder b In the DOS input as below and push the enter key Then it will be automatically upgraded c There are two commands for the conditions of product When the product is in idle condition down rom file When the product is in idle condition TECH MODE MAINTENANCE FLASH UPGRADE LOCAL fprt rom file d Do not turn off the power while upgrading process 4 4 7 2 Remote FAX This is a function that a fax with the latest firmware sends files to a fax in long distance through telephone line lt Method gt 1 Operate a fax with the latest firmware to prepare it being upgrade TECH MODE MAINTENANCE FLASH UPGRADE REMOTE 2 Input the fax number which needs to be upgraded Several faxes can be upgrade at the same time In this case enter the each fax number 3 After push
154. the enter button send the firmware file by calling to the appointed number Around 10 15 minutes needs to send the file lt Caution gt 1 sending and receiving fax must be the same model 2 A sending fax must be set up as ECM mode and a receiving memory must be set up as 100 If not the function operates abnormally 4 4 8 Identify Sale Date Only SCX 5312F This function confirms the date that consumer buys product and use product by first actually If make consumer buy and operate the machine the machine recognize the first Scan page count Print page count etc The time is remembered to first machine use event lt Method gt These contents are remembered continuously after memory delete Clear All Memory Method Press MENU 1 9 3 in sequence Firmware version is displayed on LCD FLASH VER 1 00 ENGINE VER 1 00 Press 1 in the number keypad The LCD display shows Updated date Press 2 in the number keypad The LCD display shows Product first use date Samsung Electronics 4 13 Troubleshooting 4 5 ENGINE TEST MODE The Engine Tests Mode supplies useful functions to check conducting condition of engine It tests the con ducting condition of each device and displays the result of the test at the LCD It is classified in 6 items 0 5 and the functions of items are as bellows 4 5 1 To enter the Engine Test Mode Press MENU 1 9 3 1 tech mode 4 5 2 Diagnostic in sequenc
155. 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 Check to verify that documents are not stored in memory Unplug the power cord Use a flat and clean surface Replace only with authorized components Do not force to remove or planten plastic material components A N Make sure all components are in their proper position 3 2 Rear Cover 1 Remove the six screws securing the Rear Cover 2 Separate the rear cover from the base frame and Scanner Samsung Electronics 3 1 Disassembly and Reassembly 3 3 Scanner Ass y 1 Before you remove the Scanner Ass y you 4 Open the Side Cover assembly first to open the should remove Front cover In the other words close the front Rear Cover see page 3 1 cover first to assembly it 2 Remove the six screws and take out the Shield Main Upper Unplug the one connector and CCD gt J Side Cover Ass y cable gt Front Cover Notice You should connector remove the CCD cable vertically to avoid the CCD cable pin damage 5 Remove two screws 3 Remove the three screws as shown below Samsung Electronics Disassembly and Reassembly 6 Pull up the Scanner 55 in the direction of 9 Remove the three screws securing the Platen arrow
156. the toner low information will be sent to ta specified contact point for example the service company After you access this menu select ON and when the LCD prompts enter the name and the number of the contact point the customer s fax number the model name and the serial number PROGRAM DIAL It is a function setting transmitting conditions to transmit to specific address preliminary When user transmit specific address set this function the conditionsapplied automatically 4 4 6 REPORT HELP MSG CONFIRM It shows the result of the last send operation 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 a communication error occurs while the machine is in TECH mode the protocol list will print automatically Facsimile Information Field data described in hexdecmal code Sending Receiving Name of signal FIF data described Facsimile Control Field in ASCII code PROTOCOL DUMP LIST NOV 20 2001 S R_ FCF SCII NSF 61005820003380140200001302090018010000 CSI 2020202020202020202020202020202020202020 DIS 00000000 01110111 00010111 00100010 NSF 61005020003380140200001302090018010000 CSI 2020202020202020202020220202020220202020 DIS 00000000 01110111 00010111 00100010 TSI 2020202020202020202020202020202020202020 DCS 00000000 01100001 00010101 00000000 FTT TSI 202020202020202
157. tic force is fixed to the paper by the pressure and heat of the fixer composed of pressure roller and heat roller The toner attached to the paper is melted by apply ing the heat approx 180 C from the heat roller and the pressure approx 4kg from the pressure roller After the fixing process the paper is sent out of the set to finish the printing process 3 5 7 3 Organization of the Device HVPS is comprised of electrification output unit bias output unit and transfer output unit 1 Input Unit 2 Electrification Output Enable Unit MHV Main High Voltage 3 Bias Output Enable Unit DEV Development Voltage Supply Supply Voltage BLADE Blade Voltage 4 Transfer Output Enable Unit THV Transfer High Voltage 5 Transfer Output Enable Unit THV Transfer High Voltage 6 Switching Unit 7 Feedback Unit 8 Regulation Unit 9 Output Unit o Repair Manual Samsung Electronics This Document not be used without Samsung s authorization CIRCUIT DESCRIPTION REGULATION OUTPUT WITCHIN CONTROL UNE CIRCUIT CIRCUIT MHV PWM lt Electrification Unit Block Diagram gt THVPWM PWM REGULATION SWITCHING CONTROL UNIT CONTROL UNIT CIRCUIT THV FEEDBACK SWITCHING REGULATION CONTROL UNIT CIRCUIT THVREAD THV ENVIRONMENT RECOGNITION FEED BACK CIRCUIT lt Transfer Output Unit Block Diagram gt MHV PWM
158. tive devices including control knobs and compartment covers 4 Design Alteration Warning Never alter or add to the mechanical or electrical design of this equip ment such as auxiliary connectors etc Such alterations and modifications will void the manu facturer s warranty 5 Components parts and wiring that appear to have overheated or are otherwise damaged should be replaced with parts which meet the original specifications Always determine the cause of damage or overheating and correct any potential hazards 6 Observe the original lead dress especially near sharp edges AC and high voltage power sup plies Always inspect for pinched out of place or frayed wiring Do not change the spacing between components and the printed circuit board 7 Product Safety Notice Some electrical and mechanical parts have special safety related characteristics which might not be obvious from visual inspection These safety features and the protection they provide could be lost if a replace ment component differs from the original This holds true even though the replacement may be rated for higher voltage wattage etc 8 Components critical for safety are indicated in the parts list with symbols Use only replacement components that have the same ratings especially for flame resistance and dielectric specifications A replacement part that does not have the same safety characteristics as the original may create shock fire
159. use will vary these factors The cycle period given below is for reference only COMPONENT REPLACEMENT CYCLE ADF Rubber 20 000 Pages ADF Roller 50 000 Pages Pick up Roller 75 000 Pages Transfer Roller 75 000 Pages Fuser 75 000 Pages Toner Cartridge 6 000 Pages Drum Cartridge 15 000 Pages Samsung Electronics 4 1 Troubleshooting 4 2 Error Messages Error Message Description Solution RETRY REDIAL The machine is waiting for the programmed inter You can press START to immediately val to automatically redial redial or STOP to cancel the redial operation COMM ERROR A problem with the facsimile communications has Try again occurred DOCUMENT JAM Loaded document has Jammed in the feeder Clear the document Jam When Document Jam aeeurred at ADF module DOOR OPEN The side cover is not securely latched Clear the cover until it clicks in place GROUP NOT AVAILABLE You have tried to select a group location where only a single location number can be used such as when adding locations for a multi dial opera tion Try again check location for group LINE ERROR Your unit cannot connect with the remote machine or has lost contact because of a prob lem on the phone line When the mechine has a problem in cause of fax data reception step Try again If failure persists wait an hour or so for the line to clear then try again LOAD DOCUMENT You
160. user such as developer mis assembly YES Too thin Adjust the paper guides to fit the 0 Check guide transfer paper width or sensitive paper to is grounded Check Static electricity the shutter prevents The force of springs pressing the feeding developer is weak gt Check guide DEVE Use the recommended paper Samsung Electronics 4 39 Troubleshooting Engine Error 4 40 Check CBF Harness CN7 Main B D to Try again to connector or Replace connector LSU Main B D CN7 9 P_MOTOR Signal Replace Main PBA Main B D CN7 8 LREADY Signal Replace LSU Main B D CN7 4 LDON Signal Replace Main PBA Check Main B D CN7 1 HSYNC Signal Replace LSU CAMIL END Samsung Electronics Troubleshooting 4 6 5 Toner Cartridge and Drum Cartridge Service It is not guaranteed for the default caused by using other toner and Drum Cartridge cartridge other than the cartridge supplied by the Samsung Electronic or caused by non licensed refill production Precautions on Safe keeping of the Drum Cartridge Excessive exposure to direct light more than a few minutes may cause damage to the cartridge Service for the Life of Toner Cartridge If the printed image is light due to the life of the toner you can temp

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