Samsung CLX-9350ND User manual

Service Manual
Digital Color Laser MFP
CLX-9250ND / 9350ND
■ Print/Copy speed
- CLX-9250ND : 25/25 ppm (A4)
- CLX-9350ND : 35/35 ppm (A4)
■ 1Ghz CPU (9350) / 800Mhz (9250)
■ 250 GB HDD
■ 1GB Memory (Max. 2GB)
■ 8.9 inch color graphic touch-screen LCD
■ Various option units
- 3K Booklet 󰘰nisher / 1K Standard 󰘰nisher
DCF, HCF, Punch unit , Multi fax etc.
The keynote of Product

ⓒ
Samsung Electronics Co.,Ltd. July. 2011
Printed in Korea.
VERSION NO. : 1.9 CODE : 9x50-00000E

1.1 Safety Warning …………………………………………………… 1-1
1.2 Caution for safety ………………………………………………… 1-2
1.3 ESD Precautions ………………………………………………… 1-5
2.1 Specifications …………………………………………………… 2-1
2.2 System configuration …………………………………………… 2-8
2.2 Paper path ……………………………………………………… 2-9
2.3 Sensor location …………………………………………………… 2-10
2.4 Paper handling section ………………………………………… 2-21
2.4.1 Overview……………………………………………………… 2-21
2.4.2 Components ………………………………………………… 2-24
2.4.3 Functions …………………………………………………… 2-25
2.4.4 Paper tray …………………………………………………… 2-26
2.4.5 Pick up unit…………………………………………………… 2-27
2.4.6 Registration unit …………………………………………… 2-28
2.4.7 MPF unit……………………………………………………… 2-29
2.5 Image formation ………………………………………………… 2-30
2.5.1 Printing process overview ………………………………… 2-30
2.5.2 Imaging unit ………………………………………………… 2-32
2.5.3 Cartridge transfer unit ……………………………………… 2-36
2.6 Fuser unit ………………………………………………………… 2-39
2.6.1 Fuser unit overview ………………………………………… 2-39
2.6.2 Function of components …………………………………… 2-40
2.6.3 Fuser unit drive ……………………………………………… 2-41
2.6.4 Temperature control ………………………………………… 2-42
2.7 Laser scanning unit ……………………………………………… 2-43
2.7.1 Laser scanning unit overview ……………………………… 2-43
2.7.2 Laser scanning optical path………………………………… 2-44
chapter 1 Precautions
chapter 2 Product description
Contents

2.7.3 Laser synchronizing detectors …………………………… 2-45
2.7.4 Automatic line position adjustment………………………… 2-46
2.7.5 Shutter mechanism ………………………………………… 2-49
2.8 Printer Drive system……………………………………………… 2-50
2.8.1 Drive Motors ………………………………………………… 2-50
2.8.2 Main drive unit (OPC, DEVE, ITB, T1 DIS/ENG)………… 2-52
2.8.3 Pick-up Drive ………………………………………………… 2-53
2.8.4 MP, Regi and Duplex Drive ………………………………… 2-54
2.8.5 Fuser Exit and Duplex Return Drives……………………… 2-55
2.8.6 LSU shutter Drive …………………………………………… 2-56
2.8.7 WTB leveling drive ………………………………………… 2-56
2.8.8 Drive of Toner Supply ……………………………………… 2-57
2.9 Scanner system ………………………………………………… 2-58
2.9.1 Scannner system overview ………………………………… 2-58
2.9.2 Scanning System components …………………………… 2-59
2.10 DADF system …………………………………………………… 2-61
2.10.1 DADF systme overview …………………………………… 2-61
2.10.2 Electric parts layout………………………………………… 2-62
2.10.3 Description of drive system operations…………………… 2-63
2.11 Printer Electronics configuration ……………………………… 2-69
2.11.1 Video controller …………………………………………… 2-72
2.11.2 OPE controller …………………………………………… 2-82
2.11.3 Engine controller ………………………………………… 2-86
2.11.4 Scan controller …………………………………………… 2-89
2.11.5 DADF controller…………………………………………… 2-90
2.11.6 Interface part ……………………………………………… 2-91
2.11.7 Connection part…………………………………………… 2-91
2.11.8 SMPS board ……………………………………………… 2-92
2.11.9 HVPS board ……………………………………………… 2-94
2.11.10 LSU2/LSU3 ……………………………………………… 2-98
2.11.11 Toner connector PBA …………………………………… 2-99
2.11.12 Deve Joint PBA…………………………………………… 2-100
2.11.13 Eraser PBA ……………………………………………… 2-101
2.11.14 DC Power PBA …………………………………………… 2-101
Contents

2.11.15 Cassette Joint PBA ……………………………………… 2-102
2.11.16 Side Joint PBA …………………………………………… 2-102
2.11.17 Fuser PBA ………………………………………………… 2-103
2.11.18 Waste Sensor PBA ……………………………………… 2-103
2.11.19 LED Panel PBA…………………………………………… 2-103
2.11.20 CRUM PBA ……………………………………………… 2-104
2.11.21 Development Crum Interface PBA……………………… 2-104
2.11.22 Deve Crum Joint PBA …………………………………… 2-105
2.11.23 Toner Curm Joint PBA …………………………………… 2-105
2.11.24 ITB Joint1 PBA …………………………………………… 2-105
2.11.25 ITB Encoder PBA ………………………………………… 2-106
2.11.26 ITB Joint2 PBA …………………………………………… 2-106
2.11.27 ITB Joint3 PBA …………………………………………… 2-106
2.11.28 Scan Joint PBA …………………………………………… 2-107
2.11.29 CCDM PBA ……………………………………………… 2-108
2.11.30 Scan Cover Open Sensor PBA ………………………… 2-109
2.11.31 DADF Length Sensor PBA ……………………………… 2-109
2.11.32 DADF Width Sensor PBA ……………………………… 2-110
2.11.33 DADF Mixed Sensor PBA ……………………………… 2-110
2.11.34 DADF LED Panel PBA…………………………………… 2-111
2.11.35 Exit LED Panel PBA……………………………………… 2-111
2.12 Heating cables ………………………………………………… 2-112
3.1 General Disassembly Procedure Precautions ………………… 3-1
3.2 Cover ……………………………………………………………… 3-2
3.2.1 Front cover…………………………………………………… 3-2
3.2.2 Inner cover…………………………………………………… 3-4
3.2.3 Left cover …………………………………………………… 3-7
3.2.4 Rear cover …………………………………………………… 3-8
3.2.5 Right cover…………………………………………………… 3-8
3.3 OPE unit…………………………………………………………… 3-9
Contents
chapter 3 Replacement procedure

3.4 Scan unit ………………………………………………………… 3-14
3.4.1 Scan glass …………………………………………………… 3-15
3.4.2 Scan main PBA……………………………………………… 3-16
3.4.3 Lamp ………………………………………………………… 3-17
3.4.4 Original size detection sensor……………………………… 3-19
3.4.5 Joint PBA …………………………………………………… 3-19
3.4.6 Joint sub PBA ……………………………………………… 3-20
3.4.7 Fan …………………………………………………………… 3-20
3.4.8 Pulley-belt …………………………………………………… 3-21
3.4.9 Scan motor and gear belt ………………………………… 3-22
3.4.10 Home sensor ……………………………………………… 3-22
3.4.11 Scanner heating cable …………………………………… 3-23
3.4.12 Align set …………………………………………………… 3-27
3.5 Fuser unit ………………………………………………………… 3-28
3.5.1 NC thermistor and thermostat……………………………… 3-29
3.5.2 Thermistor …………………………………………………… 3-30
3.5.3 Fuser NIP Motor …………………………………………… 3-31
3.5.4 Halogen lamp………………………………………………… 3-33
3.5.5 Fuser Bias / Fuser Bias Terminal ………………………… 3-36
3.5.6 EEPROM and photo sensor ……………………………… 3-37
3.5.7 Gear ………………………………………………………… 3-38
3.5.8 Heat roller …………………………………………………… 3-39
3.5.9 Fuser belt …………………………………………………… 3-41
3.5.10 Pressure roller and pressure roller bearing …………… 3-43
3.5.11 Cautions for reassembly ………………………………… 3-45
3.6 Cartridge transfer unit …………………………………………… 3-50
3.7 Electrical components …………………………………………… 3-56
3.7.1 Engine controller …………………………………………… 3-56
3.7.2 HDD ………………………………………………………… 3-57
3.7.3 Video controller ……………………………………………… 3-58
3.7.4 Joint PBA …………………………………………………… 3-59
3.7.5 Engine / Video shield door fan …………………………… 3-59
3.7.6 Toner PBAs ………………………………………………… 3-60
3.7.7 Toner motor ………………………………………………… 3-61
Contents

3.7.8 DC power board …………………………………………… 3-62
3.7.9 HVPS board ………………………………………………… 3-63
3.7.10 Lift motor…………………………………………………… 3-66
3.7.11 SMPS board………………………………………………… 3-66
3.7.12 SMPS FAN ………………………………………………… 3-67
3.7.13 Ozone Filter FAN ………………………………………… 3-69
3.7.14 Side joint board …………………………………………… 3-70
3.8 Main drive unit …………………………………………………… 3-71
3.8.1 Main drive PBA……………………………………………… 3-72
3.8.2 Main drive motor …………………………………………… 3-72
3.8.3 Main drive clutches ………………………………………… 3-73
3.8.4 Main drive sensors ………………………………………… 3-74
3.9 Pick up drive unit ………………………………………………… 3-75
3.9.1 Pickup drive clutch ………………………………………… 3-76
3.9.2 Pick up drive motor ………………………………………… 3-76
3.10 MP/Regi drive unit ……………………………………………… 3-77
3.10.1 MP/Regi drive motor ……………………………………… 3-78
3.11 EXit drive unit …………………………………………………… 3-79
3.11.1 Fuser/Exit drive motor …………………………………… 3-79
3.11.2 Duplex return drive motor………………………………… 3-80
3.11.3 Exit drive clutch …………………………………………… 3-81
3.12 DADF unit ……………………………………………………… 3-82
3.12.1 Width/Length sensor ……………………………………… 3-91
3.12.2 DADF main PBA ………………………………………… 3-92
3.12.3 DADF motor ……………………………………………… 3-94
3.12.4 DADF cover open ………………………………………… 3-97
3.12.5 Guide pick up ……………………………………………… 3-98
3.12.6 DADF solenoid …………………………………………… 3-100
3.13 Paper handling section ………………………………………… 3-101
3.13.1 Pick up unit………………………………………………… 3-101
3.13.2 Regi Bracket Assy ………………………………………… 3-103
3.13.3 Cover-Side unit …………………………………………… 3-105
3.13.3.1 Duplex unit …………………………………………… 3-106
3.13.3.2 MP tray ……………………………………………… 3-107
Contents

3.13.3.3 Face Up Exit Lower ………………………………… 3-109
3.13.3.4 Solenoid ……………………………………………… 3-110
3.13.4 Exit unit …………………………………………………… 3-111
3.14 Laser Scanning Unit …………………………………………… 3-114
3.15 Cassette heating cable ……………………………………… 3-119
4.1 Entering/Exiting Diagnostics Mode……………………………… 4-1
4.2 Serive mode menu tree…………………………………………… 4-2
4.2.1 Information tab ……………………………………………… 4-2
4.2.2 Maintenance counts tab …………………………………… 4-4
4.2.3 Diagnostics tab …………………………………………… 4-5
4.2.4 Service Functions ………………………………………… 4-5
4.3 Information ………………………………………………………… 4-6
4.3.1 General ……………………………………………………… 4-6
4.3.2 Supply status ……………………………………………… 4-6
4.3.3 Software version …………………………………………… 4-8
4.3.4 Service Hours ……………………………………………… 4-8
4.3.5 Fault Log …………………………………………………… 4-8
4.3.5 Print reports ………………………………………………… 4-8
4.4 Maintenance Counts …………………………………………… 4-10
4.4.1 Fault count ………………………………………………… 4-10
4.4.2 Jam count …………………………………………………… 4-11
4.4.3 Part replacement count …………………………………… 4-13
4.5 Diagnotics ………………………………………………………… 4-14
4.5.1 Engine diagnostics ………………………………………… 4-14
4.5.1.1 NVM Read/Write ……………………………………… 4-14
4.5.1.2 Engine Test Routines ………………………………… 4-17
4.5.2 Fax diagnostics …………………………………………… 4-24
4.5.2.1 Fax NVM Read/Write ………………………………… 4-24
4.5.2.2 Fax Test Routines ……………………………………… 4-25
4.5.3 Scanner diagnostics ……………………………………… 4-27
4.5.3.1 Shading Test ………………………………………… 4-27
Contents
chapter 4 Service mode (Diagnostic mode)

chapter 5 Updating Firmware
chapter 6 Preventive maintenance (PM)
4.5.3.2 Scanner/DADF NVM Read/Write …………………… 4-27
4.5.3.3 Scanner/DADF Test Routines ……………………… 4-28
4.5.4 Adjustment ………………………………………………… 4-30
4.5.4.1 Print Adjustment ……………………………………… 4-30
4.5.4.2 Copy Adjustment ……………………………………… 4-32
4.5.4.3 Scan Area Adjustment ………………………………… 4-33
4.5.4.4 DADF Adjustment ……………………………………… 4-35
4.5.4.5 Finisher Adjustment …………………………………… 4-37
4.5.5 ACS(Auto Color Sensing) ………………………………… 4-40
4.5.6 Color Management ………………………………………… 4-41
4.5.6.1 Auto Color Registration ……………………………… 4-41
4.5.6.2 Full Color Registration ………………………………… 4-42
4.5.6.3 Auto Color Tone Adjustment ………………………… 4-43
4.6 Sevice functions ………………………………………………… 4-46
4.6.1 Main Memory Clear ………………………………………… 4-46
4.6.2 Hard Disk Maintenance …………………………………… 4-46
4.6.3 Debug Log …………………………………………………… 4-46
4.6.4 Port …………………………………………………………… 4-47
4.6.5 Capture Log ………………………………………………… 4-47
4.6.6 Toner Save ………………………………………………… 4-47
4.6.7 Count Setting of Large Page ……………………………… 4-47
4.6.8 TR Control Mode …………………………………………… 4-48
5.1 Updating from the Printer Control Panel ……………………… 5-2
5.2 Updating from the Network …………………………………… 5-8
6.1 PM Supplies ……………………………………………………… 6-1
6.2. PM Procedures ………………………………………………… 6-5
6.2.1 Toner cartridge ……………………………………………… 6-5
Contents

6.2.2 Imaging unit ………………………………………………… 6-7
6.2.3 Cartridge Transfer Unit …………………………………… 6-12
6.2.4 2nd Transfer roller ………………………………………… 6-15
6.2.5 Fuser Unit …………………………………………………… 6-16
6.2.6 Pick up/ Retard/ Forward roller …………………………… 6-17
6.2.7 Ozone Filter ………………………………………………… 6-17
6.2.8 Dust Filters ………………………………………………… 6-18
6.2.9 DADF Rollers (Pick up /ADF/ Retard) …………………… 6-19
6.2.10 MP Pick up / Retard / Forward roller …………………… 6-24
6.3. Cleaning the PM parts ………………………………………… 6-26
6.3.1 Cleaning the charge scorotron …………………………… 6-26
6.3.2 Cleaning the pick up roller ………………………………… 6-27
6.3.3 Cleaning the Regi roller …………………………………… 6-28
6.3.4 Cleaning the tray1 feed roller ……………………………… 6-28
6.3.5 Cleaning the tray2 feed roller ……………………………… 6-29
6.3.6 Cleaning the LSU window ………………………………… 6-30
6.3.7 Cleaning the DADF retard rubber pad …………………… 6-31
6.3.8 Cleaning the DADF rollers ………………………………… 6-32
7.1 Procedure of checking the symptoms ………………………… 7-1
7.2 Error code and troubleshooting ………………………………… 7-3
7.2.1 Error code and error message …………………………… 7-3
7.2.2 Error Code Details ………………………………………… 7-14
7.3 Image quality problems and solutions ………………………… 7-134
7.3.1 Vertical white band / Dark band …………………………… 7-137
7.3.2 Horizontal white band / dark band ………………………… 7-139
7.3.3 Color spot …………………………………………………… 7-140
7.3.4 Foggy background ………………………………………… 7-141
7.3.5 Blurred image ……………………………………………… 7-142
7.3.6 Incorrect color registration ………………………………… 7-143
chapter 7 Preventive Maintenance (PM)
Contents