Chapter 4 Adjusting And Updating Settings - Brother HL-5440D Service Manual

9.40 Registration front/rear sensor PCB ASSY / Registration front actuator
/ Registration rear actuator / Registration actuator spring ................................................. 3-73
10. DISASSEMBLY PROCEDURE (LT UNIT)................................................................................. 3-76
10.1 Paper tray 2 ....................................................................................................................... 3-76
10.2 T2 roller holder ASSY ........................................................................................................ 3-78
10.3 T2 side cover L .................................................................................................................. 3-79
10.4 T2 side cover R.................................................................................................................. 3-80
10.5 T2 front cover ASSY .......................................................................................................... 3-81
10.6 T2 relay PCB ASSY........................................................................................................... 3-82
10.7 T2 clutch ............................................................................................................................ 3-83
10.8 T2 paper feed sensor PCB ASSY...................................................................................... 3-84
10.9 T2 back cover .................................................................................................................... 3-88
10.10LT connector ASSY (T2).................................................................................................... 3-89
CHAPTER 4 ADJUSTING AND UPDATING SETTINGS
AS REQUIRED AFTER PARTS REPLACEMENT
1. IF YOU REPLACE THE MAIN PCB ASSY .................................................................................. 4-1
1.1 Installing Firmware (Sub Firmware, Main Firmware) ........................................................... 4-2
1.1.1 Checking firmware version .................................................................................... 4-2
1.1.2 Installing firmware ................................................................................................. 4-2
1.2 Setting Default Paper Size................................................................................................... 4-4
1.3 Setting Serial Number and Entering Adjusted Value of Laser Unit...................................... 4-5
2. IF YOU REPLACE THE LASER UNIT ......................................................................................... 4-7
2.1 Entering Adjusted Value of Laser Unit................................................................................. 4-8
3. IF YOU REPLACE THE LOW-VOLTAGE POWER SUPPLY PCB ASSY ................................ 4-10
3.1 Resetting Irregular Power Supply Detection Counter ........................................................ 4-10
4. IF YOU REPLACE THE HIGH-VOLTAGE POWER SUPPLY PCB ASSY................................ 4-11
4.1 Initializing Pre-discharge Detection Parameters................................................................ 4-11
5. IF YOU REPLACE ANY PERIODIC REPLACEMENT PARTS ................................................. 4-12
5.1 Resetting Counter of Periodic Replacement Parts ............................................................ 4-12
CHAPTER 5 SERVICE FUNCTIONS
1. MAINTENANCE MODE................................................................................................................ 5-1
1.1 How to Enter Maintenance Mode ........................................................................................ 5-1
1.1.1 Method of entering end-user accessible maintenance mode................................ 5-1
1.1.2 Method of entering maintenance mode for service personnel .............................. 5-2
1.2 List of Maintenance Mode Functions ................................................................................... 5-3
1.2.1 List of maintenance mode functions for LCD models............................................ 5-3
1.2.2 List of maintenance mode functions using [Go] button for LED models................ 5-4
1.3 Details of Maintenance Mode Functions for LCD Models.................................................... 5-6
1.3.1 Initialize EEPROM parameters (function code: 01, 91)......................................... 5-6
1.3.2 Print test pattern (function code: 09) ..................................................................... 5-7
iv
Confidential