iii
Confidential
9.3 Outer chute ASSY  ............................................................................................................  3-19
9.4 Front cover ASSY / Support flap .......................................................................................  3-20
9.5 Side cover R  .....................................................................................................................  3-23
9.6 Fuser cover .......................................................................................................................  3-24
9.7 Inner chute ASSY  .............................................................................................................  3-25
9.8 Side cover L ......................................................................................................................  3-26
9.9 Top cover ASSY  ...............................................................................................................  3-27
9.10 Fuser unit ..........................................................................................................................  3-31
9.11 Low-voltage power supply PCB ASSY  .............................................................................  3-33
9.12 New toner sensor PCB ASSY ...........................................................................................  3-35
9.13 HVPS flat cable / High-voltage power supply PCB ASSY  ................................................  3-36
9.14 Fan ...................................................................................................................................  3-38
9.15 Relay PCB ASSY (For toner box models and MP models) / 
Toner box new PCB ASSY (For models with toner box) ..................................................  3-39
9.16 Laser unit flat cable / Laser unit ........................................................................................  3-41
9.17 Filter ..................................................................................................................................  3-43
9.18 Wireless LAN PCB (Only for wireless network models)  ...................................................  3-44
9.19 Roller holder ASSY ...........................................................................................................  3-45
9.20 Main PCB ASSY  ...............................................................................................................  3-46
9.21 T1 clutch / Registration clutch ...........................................................................................  3-47
9.22 Frame L unit ......................................................................................................................  3-50
9.23 Paper feed motor / Paper feed motor flat cable ................................................................  3-53
9.24 Fuser gear 64R/36R  .........................................................................................................  3-55
9.25 Toner sensor PCB ASSY (Only for models with Toner box)  ............................................  3-56
9.26 Front cover sensor ............................................................................................................  3-57
9.27 Eject sensor PCB ASSY ...................................................................................................  3-58
9.28 Registration front/rear actuator holder ASSY  ...................................................................  3-60
9.29 Paper feed roller ASSY / Paper feed sensor PCB ASSY  .................................................  3-63
CHAPTER 4 ADJUSTING AND UPDATING SETTINGS AS 
REQUIRED AFTER PARTS REPLACEMENT
1. IF YOU REPLACE THE MAIN PCB ASSY .................................................................................  4-1
1.1 Setting by Spec .................................................................................................................... 4-2
1.2 Installing Firmware (Sub firmware and main firmware)  ......................................................  4-4
1.2.1 Checking firmware version  .....................................................................................  4-4
1.2.2 Installing firmware  ..................................................................................................  4-5
1.3 Setting Serial Number and Entering Adjusted Value of Laser Unit .....................................  4-6
2. IF YOU REPLACE THE LOW-VOLTAGE POWER SUPPLY PCB ASSY  .................................  4-9
2.1 Reset Irregular Power Supply Detection Counter of 
the Low-voltage Power Supply PCB ...................................................................................  4-9
3. IF YOU REPLACE THE LASER UNIT  ......................................................................................  4-10
3.1 Entering Adjusted Value of Laser Unit ..............................................................................  4-11