iv
Confidential
8.19 Fan ................................................................................................................................... 3-56
8.20 Laser unit flat cable / Laser unit ........................................................................................ 3-57
8.21 Filter .................................................................................................................................. 3-59
8.22 Wireless LAN PCB ............................................................................................................ 3-60
8.23 Roller holder ASSY ........................................................................................................... 3-61
8.24 Main PCB ASSY ............................................................................................................... 3-62
8.25 T1 clutch / Registration clutch ........................................................................................... 3-63
8.26 Front chute ASSY / Frame L unit ...................................................................................... 3-64
8.27 Paper feed motor / Paper feed motor flat cable ................................................................ 3-66
8.28 Front cover sensor ............................................................................................................ 3-68
8.29 Eject sensor PCB ASSY ................................................................................................... 3-69
8.30 Registration front/rear actuator holder ASSY ................................................................... 3-71
8.31 Paper feed sensor PCB ASSY ......................................................................................... 3-74
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, Setting Serial Number and
Entering Adjusted Value of Laser Unit 4-2
1.2 Installing Firmware .............................................................................................................. 4-5
1.2.1 Checking firmware version ..................................................................................... 4-5
1.2.2 Installing firmware .................................................................................................. 4-6
1.3 Initializing the EEPROM of the Main PCB ASSY
(Function code 01) 4-6
1.4 Acquiring White Level Data (Function code 55) ................................................................. 4-6
1.5 Resetting to Factory Shipping State ................................................................................... 4-7
2. IF YOU REPLACE THE LOW-VOLTAGE POWER SUPPLY PCB ASSY ................................. 4-8
2.1 Reset Irregular Power Supply Detection Counter of the Low-voltage Power Supply PCB (Func-
tion code 88) 4-8
3. IF YOU REPLACE THE LASER UNIT ........................................................................................ 4-9
3.1 Entering Adjusted Value of Laser Unit .............................................................................. 4-10
4. IF YOU REPLACE THE PANEL UNIT OR PANEL CONTROL PCB ....................................... 4-12
4.1 Checking LCD Operation (Function code 12) ................................................................... 4-12
5. IF YOU REPLACE THE ADF UNIT, CIS UNIT OR DOCUMENT SCANNER UNIT ................. 4-13
5.1 Acquiring White Level Data (Function code 55) ............................................................... 4-13
5.2 Scanning and Printing Check ........................................................................................... 4-13
CHAPTER 5 SERVICE FUNCTIONS
1. FUNCTION CODE ....................................................................................................................... 5-1
1.1 How to Enter Maintenance Mode ....................................................................................... 5-1
1.1.1 Method of entering maintenance mode for service personnel ............................... 5-1
1.1.2 Method of entering end-user accessible maintenance mode ................................. 5-1
1.2 List of Maintenance Mode Functions .................................................................................. 5-2