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Samsung ML-4550 Series Service Manual

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SERVICE
DIGITAL LASER PRINT
DIGITAL LASER PRINT
ML-4550 Series
ML-4550/XEU
Basic Model : ML-4550
Manual
[The keynote of Product]
- Series Model: ML-4550 / 4551N / 4551ND
- High speed Laser Printer:
Up to 43 ppm in A4 (45 ppm in Letter),
Duplex: 29 ipm (A4); 30 ipm (Letter)
- Resolution: Up to 1200 x 1200 dpi
- Marvell 500Mhz
- Memory: 128 MB (Max. 512 MB)
128, or 256 MB optional memory available.
Use only the Samsung-approved DIMM.
128 MB: ML-MEM150, 256 MB: ML-MEM160
- Option:
ML-4550:500-sheet trays, ethernet 10/100 Base
TX wired LAN, ethernet 10/100 Base
hard disk, duplex unit, DIMM
- Toner cartridge:
Starter: 10K or 20K pages
Consumable: 10K or 20K pages
- Duty cycle: Monthly Up to 150,000 pages
CONTENTS

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Summary of Contents for Samsung ML-4550 Series

  • Page 1: Service Manual

    - Resolution: Up to 1200 x 1200 dpi - Marvell 500Mhz - Memory: 128 MB (Max. 512 MB) 128, or 256 MB optional memory available. Use only the Samsung-approved DIMM. 128 MB: ML-MEM150, 256 MB: ML-MEM160 - Option: ML-4550:500-sheet trays, ethernet 10/100 Base...
  • Page 2 ELECTRONICS Samsung Electronics Co.,Ltd. Mar. 2006 * This service manual is a property of Samsung Electronics Co., Ltd. Printed in Korea. Any unauthorized use of Manual can be punished under applicable international and/or domestic law. VERSION NO. : 1.00 CODE : JC-0168F...

  • Page 3: Product Specifications

    Contents 1. Precautions 1.1 Safety Warning 1.2 Caution for safety 1.3 ESD Precautions 2. Product Specifications 2.1 Product Overview 2.2 Specifications 2.3 Model Comparison Table 3. Summary of Product 3.1 Printer Components 3.2 System Layout 3.3 Engine H/W Specifications 3-11 4.

  • Page 4: Disassembly And Reassembly

    Continue... 5. Disassembly and Reassembly 5.1 General Precautions on Disassembly 5.2 Transfer Roller 5.3 MPF Ass’y 5.4 Holder Pad Ass'y 5.5 Retard Ass'y 5.6 Feed2 Idle Unit 5.7 Cover Right 5.8 Main PBA 5.9 Main Drive Ass'y 5.10 DEVE Drive Ass'y 5-10 5.11 Connector PBA 5-11...

  • Page 5: Table Of Contents

    Continue... 6. Troubleshooting 6.1 The cause and solution of Bad image 6.2 The cause and solution of the bad discharge 6.3 The cause and solution of the malfunction 6-13 6.4 Maintaining the toner cartridge 6-17 6.5 The cause and solutions of bad environment of the software 6-22 7.
  • Page 6 Continue... 10. Schematic Diagram 10.1 Main Board 10-1 10.2 DIMM board 10-17 10.3 CRUM board 10-19 10.4 EMPTY board 10-20 10.5 HVPS 10-21 10.6 Panel 10-25 10.7 SCF 10-26 10.8 Toner sensor 10-29 10.9 HDD.eps 10-30 11. Reference Information 11.1 Troubleshooting Tools 11-1 11.2 Acronyms and Abbreviations 11-2...
  • Page 7 7.4 Fuser Unit p.7-6 7.5 REGI Assembly p.7-7 7.6 Main Motor Assembly p.7-8 7.7 Deve Motor Assembly p.7-9 7.8 Exit Sorenoid Assembly p.7-10 7.9 Cassette Assembly p.7-11 7.10 Duplex Unit p.7-12 7.11 SCF Unit p.7-13 Service Manual Samsung Electronics...

  • Page 8: Exploded Views & Parts List

    Exploded Views & Parts List 7.1 Main Assembly (Network only) 39-2 39-1 20-1 20-3 20-2 21-3 21-2 21-1 Service Manual Samsung Electronics...

  • Page 9: Cover Assembly

    Exploded Views & Parts List 7.2 Cover Assembly 1-12 1-17 1-13 1-10 1-11 1-16 1-15 1-14 1-18 6-10 7 (N/A : ML-4551ND) Service Manual Samsung Electronics...
  • Page 10 Exploded Views & Parts List 7.3 Frame Assembly(1/2) Service Manual Samsung Electronics...

  • Page 11: Frame Assembly

    50-5 49-9 49-10 50-7 49-13 50-1 49-11 49-9 49-10 50-2 49-12 59-11 60-6 59-9 60-6-3 60-6-1 59-5 60-1 59-6 60-6-2 59-10 59-5-1 59-8 60-4 59-5-2 59-7 59-4 60-5 60-2 59-2-1 60-3 59-2-2 59-1 59-2-3 59-3 59-2 Service Manual Samsung Electronics...

  • Page 12: Fuser Unit

    Exploded Views & Parts List 7.4 Fuser Unit 1-14 1-14 1-26 1-11 1-15 1-10 1-12 1-18 1-27 1-28 1-21 1-29 1-19 1-19 1-17 1-22 1-16 1-20 1-17 1-13 1-24 1-23 3-15 3-16 3-14 3-10 3-13 3-11 3-12 3-14 Service Manual Samsung Electronics...

  • Page 13: Regi Assembly

    Exploded Views & Parts List 7.5 REGI Assembly Service Manual Samsung Electronics...

  • Page 14: Main Motor Assembly

    Exploded Views & Parts List 7.6 Main Motor Assembly Service Manual Samsung Electronics...

  • Page 15: Deve Motor Assembly

    Exploded Views & Parts List 7.7 Deve Motor Assembly Service Manual Samsung Electronics...
  • Page 16 Exploded Views & Parts List 7.8 Duplex Sorenoid Assembly Service Manual 7-10 Samsung Electronics...

  • Page 17: Cassette Assembly

    Exploded Views & Parts List 7.9 Cassette Assembly Service Manual 7-11 Samsung Electronics...

  • Page 18: Duplex Unit

    Exploded Views & Parts List 7.10 Duplex Unit Service Manual 7-12 Samsung Electronics...

  • Page 19: Scf Unit

    Exploded Views & Parts List 7.11 SCF Unit Service Manual 7-13 Samsung Electronics...

  • Page 20: Hvps

    7.1-5 JC63-00694B TRAY-M_LINK MP(L);ML-3560,ABS,T2.0,W23.2 K4282 7.1-6 JC63-00689B TRAY-M_LINK MP(R);ML-3560,ABS,T2.0,W23.2 K4283 7.1-7 JC66-00540B ROLLER-TRANSFER;ML-3560,NBR Foam,¥Õ17.8, 7.1-8 JC96-01729A ELA UNIT-HOLDER TR R;ML-6060A,SAMSUNG,SE K3139 7.1-8-1 JC72-41142A PMO-BUSHING TR;ML-5000A,POM(CF-610,CH-15 7.1-8-2 JC61-00046A SPRING ETC-TR R HAWK;ML-6060A,SUS 304 WP 7.1-8-3 JC72-41145C PMO-TRANSFER HOLDER R;ML-6060A,ABS,VIOLE 7.1-8-4 JC70-11053A IPR-PLATE TR;ML-5000A,PB(C5210P),-,T0.15...

  • Page 21: Panel

    Parts List SA : SERVICE AVAILABLE SNA : SERVICE not AVAILABLE DNA : DELIVERY not AVAILABLE Drawer# SEC-Code Description & Specification Location Service 7.1-35 JC96-04015A ELA UNIT-CASSETTE;ML-4550,SEC,-,110V/220 7.1-36 JC92-01839A PBA-ERASE_LAMP;ML-4550,SEC,-,FR1,-,-,-,2 7.1-38 JC31-00050A FAN;AD0424HB-C56,CLP-600,PBT+GF,-,3PIN,N 7.2-1 JC96-03978A ELA UNIT-COVER TOP;ML-4550,SEC,-,110V/22 7.2-1-1 JC63-00699A COVER-M_TOP;ML-3560,ABS,T2.5,W396.0,L426 7.2-1-2 JC63-01101A...
  • Page 22 Parts List SA : SERVICE AVAILABLE SNA : SERVICE not AVAILABLE DNA : DELIVERY not AVAILABLE Drawer# SEC-Code Description & Specification Location Service 7.3-4-6 JC61-70965A SPRING ETC-EMPTY;ML-6000,SUS304-WPB,PI0. O1099 7.3-4-7 0604-001095 PHOTO-INTERRUPTER;TR,90%,150mW,DIP-4,BK P0013 7.3-4-7 0604-000165 PHOTO-INTERRUPTER;TR,-,-,-,BK K3805 7.3-4-7 0604-001210 PHOTO-INTERRUPTER;TR,-,200mW,DIP-4,ST 7.3-4-7 0604-001230 PHOTO-INTERRUPTER;OPIC,-,-,-,BK 7.3-4-8...
  • Page 23 Parts List SA : SERVICE AVAILABLE SNA : SERVICE not AVAILABLE DNA : DELIVERY not AVAILABLE Drawer# SEC-Code Description & Specification Location Service 7.3-48-8 JC61-01239A GUIDE-M SHAFT_BELT;ML-3560,POM,0.6,10,6. 7.3-49 JC96-04016A ELA UNIT-ROLLER_IDLE;ML-4550,SEC,-,110V/ 7.3-49-2 JC61-00635A HOUSING-M-RETARD;ML-2150,POM(M90-44),-,- H6035 7.3-49-3 JC73-00207A RUBBER-RETARD;ML-3560,IR,19.5,35,30,YELL C4026 7.3-49-4 JC72-00993A PMO-HUB OUT RETARD;ML-2150,POM,BLK,-,M90 K4021...
  • Page 24 7.3-86 JC65-00009A TERMINAL-SPRING_TR;ML-3560,STS304WPB,-,- K4279 7.3-89 JC63-00679A GROUND-P-ZENER;ML-3560,C5210P,T0.2,26.6, 7.3-90 JC63-00676A GROUND-P-FUSER;ML-3560,SUS301,T0.2,32.2, 7.3-91 JC65-00006A TERMINAL-P_HV CARDINAL;ML-2060,SUS304 1/ K4272 7.3-92 JC97-01401A MEA UNIT-TERMINAL:TR;ML-5000A,SAMSUNG,KO 7.3-93 JC39-00625A HARNESS-HVPS;ML-4550,CBF,UL 1617/3239,5P 7.3-94 JC70-00332A IPR-P_GROUND OPC;ML-2150,SUS301 3/4H,-,0 O0020 7.3-95 JC92-01831A PBA SUB-EMPTY;ML-4550,SEC,EXPORT,-,-,-,- 7.3-96 JC39-00620A HARNESS-SENSOR;ML-4550,CBF,UL 1061,6PIN, 7.3-97 JC92-01262C PBA SUB-FEED SENSOR;ML-3560,SEC,KOREA,FE...
  • Page 25 Parts List SA : SERVICE AVAILABLE SNA : SERVICE not AVAILABLE DNA : DELIVERY not AVAILABLE Drawer# SEC-Code Description & Specification Location Service 7.4-3-14 6006-001078 SCREW-TAPTITE;WSP,PH,+,M3,L10,ZPC(YEL),S 7.4-4 JC97-02631A MEA UNIT-FUSER_GU_R;ML-4550,-,-,-,-,-,- 7.4-4-1 JC61-01226B GUIDE-M_REAR;ML-3560,HIPS,2.5,98,100.3,B 7.4-4-2 JC72-00382A PMO-BUSHING TX;ML-6060A,POM M9044,BLK,-, 7.4-4-6 JC61-01549A HOLDER-M REAR_LEVER;ML-3560,PC,NH-1023XD 7.5-1 JC61-00674A...
  • Page 26 ELA ETC-SUBSIDIARY;ML-2150,SEC,110V/220V #N/A JC96-04095A ELA HOU BASE-FRAME;ML-4550,SEC/XEROX,-,1 #N/A JC96-04122A ELA ETC-LEVEL_PARTS;ML-4550,SEC,-,110V/2 #N/A JC99-01973C INA-ACCESSORY;ML-4550,SAMSUNG,XEU,-,-,- #N/A JC99-01991C PAA-LABEL;ML-4550/XEU,SEC,-,-,-,- #N/A JC99-01992A PAA WOOD-PACKING;ML-4550,SAMSUNG,-,-,-,- #N/A 0203-000007 TAPE-FILAMENT;3M,T0.15,W18,L55M,TRP #N/A 0203-001100 TAPE-OPP MASKING;OPP/W75/CLR,T0.05,W75,L #N/A 0205-001002 GREASE-BEARING;NYOGEL744,WITH PTFE,- #N/A 0205-001003 GREASE-BEARING;NYOGEL788,DAMPING GREASE, #N/A 3903-000067 CBF-POWER CORD;DT,GB,GP3/YES(A),I(IEC C1...

  • Page 27: Cover Right

    #N/A JC73-00141A RPR-PAD CASSETTE;ML-1510,URETHANE SPONGE R0020 #N/A JC96-01579A ELA HOU-MOTOR GND;SF-5100,HANSUNG,100Moh Z2265 #N/A JC96-01730B ELA UNIT-HOLDER_TR_L;ML-4550,SEC,-,-,-,- #N/A JC96-03931A ELA UNIT-DEVE KIT;ML-4550,SAMSUNG,-,10K, #N/A JC96-04120A ELA UNIT-CHECK_SENSOR;ML-4550,SEC,-,110V #N/A JC97-02388B MEA UNIT-COVER RIGHT;ML-3560,SEC,-,110V/ E4064 #N/A JC97-02662A MEA UNIT-EXIT DUP;ML-4550,-,-,SUM+EPDM,S #N/A JF68-10532B LABEL(P)-BAR CODE;CLP-500,-,YUPO PAPER,1...
  • Page 28 Parts List SA : SERVICE AVAILABLE SNA : SERVICE not AVAILABLE DNA : DELIVERY not AVAILABLE Drawer# SEC-Code Description & Specification Location Service #N/A 3711-002810 HEADER-BOARD TO CABLE;BOX,9P,1R,2mm,STRA #N/A 3711-002811 HEADER-BOARD TO CABLE;BOX,10P,1R,2mm,STR #N/A 3711-003408 HEADER-BOARD TO CABLE;BOX,2P,1R,2mm,STRA #N/A 3711-003409 HEADER-BOARD TO CABLE;BOX,3P,1R,2mm,STRA #N/A 3711-003410...
  • Page 29 JC94-01201A PHANTOM AU JC92-01823A #N/A JC94-01202A PHANTOM AU JC92-01824A #N/A JC96-04114A ELA UNIT-FEED_SENSOR;ML-4550,SEC,110V/22 #N/A JC97-01688A MEA UNIT-HOLDER CR;ML-2150,SAMSUNG,-,CAR #N/A JC97-01692A MEA UNIT- ROLLER CLEAN;ML-2150,SAMSUNG,- K3609 #N/A JC97-02212A MEA UNIT-DRUM;ML-3560,SAMSUNG,-,OPC DRUM #N/A JC97-02224A MEA UNIT-BLADE;ML-3560,SAMSUNG,-,DOCTOR #N/A JC97-02225B MEA UNIT-CLEAN;ML-4550,SAMSUNG,-,CLEANIN #N/A JC97-02227A MEA UNIT-ROLLER CR;ML-3560,SAMSUNG,-,ROL...
  • Page 30 Parts List SA : SERVICE AVAILABLE SNA : SERVICE not AVAILABLE DNA : DELIVERY not AVAILABLE Drawer# SEC-Code Description & Specification Location Service #N/A JC97-02621A MEA UNIT-HOPPER;ML-4550,SAMSUNG,-,-,-,-, #N/A JC97-02622A MEA UNIT-DUCT;ML-4550,SAMSUNG,-,-,-,-,- #N/A JC97-02632A MEA UNIT-FUSER_BK_G;ML-4550,-,-,-,-,-,- #N/A JG72-40960A PMO-CAP TONER;SF6000,PP,BLK,-,-,VO,-,-,- #N/A 0201-001162 ADHESIVE-CYA;LOCTITE403,NTR,1250,20G...
  • Page 31 Parts List SA : SERVICE AVAILABLE SNA : SERVICE not AVAILABLE DNA : DELIVERY not AVAILABLE Drawer# SEC-Code Description & Specification Location Service #N/A 2007-000082 R-CHIP;3.3Kohm,5%,1/10W,TP,1608 #N/A 2007-000084 R-CHIP;4.7Kohm,5%,1/10W,TP,1608 #N/A 2007-000086 R-CHIP;5.6Kohm,5%,1/10W,TP,1608 #N/A 2007-000090 R-CHIP;10Kohm,5%,1/10W,TP,1608 #N/A 2007-000093 R-CHIP;20Kohm,5%,1/10W,TP,1608 #N/A 2007-000094 R-CHIP;22Kohm,5%,1/10W,TP,1608 #N/A 2007-000098...
  • Page 32 Parts List SA : SERVICE AVAILABLE SNA : SERVICE not AVAILABLE DNA : DELIVERY not AVAILABLE Drawer# SEC-Code Description & Specification Location Service #N/A 2203-006676 C-CER,CHIP;10000NF,+80TO-20%,10V,Y5V,201 #N/A 2203-006818 C-CER,CHIP;47000nF,20%,6.3V,X5R,3216 #N/A 2401-000480 C-AL;10uF,20%,50V,GP,TP,5x11,5 #N/A 2401-002420 C-AL;470UF,20%,16V,WT,TP,10X12,5 #N/A 2402-001042 C-AL,SMD;100uF,20%,16V,GP,TP,6.6x6.6x5.4 #N/A 2402-001049 C-AL,SMD;10uF,20%,16V,GP,TP,3.3x3.3x5.4 #N/A 2402-001106...
  • Page 33 PHANTOM AU JC92-01807A #N/A JC96-04058B ELA UNIT-HEAT;ML-4550,-,-,FUSER,220V,-,- #N/A JC96-04059A ELA UNIT-THERMOSTAT L;ML-4550,-,-,-,-,-, #N/A JC96-04060A ELA UNIT-ELECTRODE R;ML-4550,-,-,-,-,-,- #N/A JC97-01088A MEA RACK-BUSHING AGI;ML-6000,SEC,KOR,POM #N/A JC97-02214A MEA UNIT-AGITATOR;ML-3560,SAMSUNG,-,AGIT #N/A JC97-02663A MEA UNIT-EXIT F_UP;ML-4550,-,-,SUM+EPDM, #N/A 0401-000005 DIODE-SWITCHING;1N4148,75V,150mA,DO-35,T #N/A 0407-000101 DIODE-ARRAY;DA204K,20V,100mA,C2-3,SOT-23 #N/A 0601-001908 LED;ROUND,RED,3MM,630NM,3.2X4.6MM #N/A 1103-001367 IC-EEPROM;AT88SC0204C,2KBIT,256X8BIT,SOP...
  • Page 34 Parts List SA : SERVICE AVAILABLE SNA : SERVICE not AVAILABLE DNA : DELIVERY not AVAILABLE Drawer# SEC-Code Description & Specification Location Service #N/A JC63-00710A SHEET-FILM AGITATOR;ML-3560,PET,0.125,24 #N/A JC66-01264A ROLLER-EXIT_F/UP;ML-4550,SUM+EPDM,17.6,- #N/A JC66-01266A GEAR-FUSER;ML-4550,PPS,OFL4036,M1,Z49,-, #N/A JC67-00184A CAP-END;ML-4550,PPS, OFL4036,t2,D38.0,18 #N/A JC67-00185A CAP-CARBON BRUSH;ML-4550,PET+GF30%,FR530 #N/A JC71-00057A ELECTRODE-P-FU_R_08;ML-3560,T0.8,20.2,32...

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