iii
Confidential
9. DISASSEMBLY PROCEDURE .................................................................................................  3-14
9.1 Preparation .......................................................................................................................  3-14
9.2 Back Cover  .......................................................................................................................  3-15
9.3 Outer Chute ASSY ............................................................................................................  3-16
9.4 Front Cover ASSY  ............................................................................................................  3-17
9.5 Side Cover R  ....................................................................................................................  3-18
9.6 Fuser Cover ......................................................................................................................  3-19
9.7 Inner Chute ASSY  ............................................................................................................  3-20
9.8 Side Cover L  .....................................................................................................................  3-21
9.9 Top Cover ASSY  ..............................................................................................................  3-22
9.10 Fuser Unit  .........................................................................................................................  3-25
9.11 Low-voltage Power Supply PCB ASSY  ............................................................................  3-27
9.12 Fan ...................................................................................................................................  3-29
9.13 High-voltage Power Supply PCB ASSY  ...........................................................................  3-30
9.14 Filter ..................................................................................................................................  3-32
9.15 Laser Unit  .........................................................................................................................  3-33
9.16 Wireless LAN PCB (Wireless network model only) ..........................................................  3-35
9.17 Roller Holder ASSY  ..........................................................................................................  3-36
9.18 Main PCB ASSY  ...............................................................................................................  3-37
9.19 T1 Clutch and Registration Clutch  ....................................................................................  3-38
9.20 New Toner Sensor PCB ASSY .........................................................................................  3-39
9.21 Main Frame L ASSY  .........................................................................................................  3-40
9.22 Main Motor ........................................................................................................................  3-42
9.23 Fuser Gear 67R/40R  ........................................................................................................  3-44
9.24 Eject Sensor PCB ASSY  ..................................................................................................  3-45
9.25 Registration Front/rear Actuator Holder ASSY  .................................................................  3-47
CHAPTER 4 ADJUSTING AND UPDATING SETTINGS 
AS REQUIRED AFTER PARTS REPLACEMENT
1. IF YOU REPLACE THE MAIN PCB ASSY ................................................................................. 4-1
1.1 Setting Default Paper Size (LED Models) / Setting by Spec (LCD Models)  .......................  4-2
1.2 Installing Firmware (Sub Firmware, Demo Firmware, and Main Firmware) .......................  4-3
1.2.1 Checking firmware version  .....................................................................................  4-3
1.2.2 Installing firmware  ..................................................................................................  4-4
1.3 Setting Serial Number and Entering Adjusted Value of Laser Unit .....................................  4-5
2. IF YOU REPLACE THE LOW-VOLTAGE POWER SUPPLY PCB ASSY  ................................. 4-6
2.1
Reset Irregular Power Supply Detection Counter of Low-voltage Power Supply PCB
 ..........  4-6
3. IF YOU REPLACE THE LASER UNIT ........................................................................................  4-7
3.1 Entering Adjusted Value of Laser Unit ................................................................................  4-8