Brother HL-3400CN Service Manual page 5

TABLE OF CONTENTS
CHAPTER 6 PERIODIC MAINTENANCE ....................................... 6-3
1. GENERAL ...................................................................................................... 6-3
1.1 Handling Precautions .......................................................................................................... 6-3
1.2 List of Maintenance Tools ............................................................................................................. 6-4
1.3 List of Consumables for Maintenance ................................................................................. 6-5
2. PERIODIC MAINTENANCE CLEANING......................................................... 6-6
2.1 Cleaning the Register Roller................................................................................................ 6-9
2.2 Cleaning the Paper Guide ................................................................................................. 6-10
2.3 Cleaning the Paper Exit Roller........................................................................................... 6-11
2.4 Cleaning the Transfer Roller.............................................................................................. 6-12
2.5 Cleaning the Paper Discharger ......................................................................................... 6-13
2.6 Cleaning the OPC Belt Cartridge....................................................................................... 6-14
2.7 Cleaning the Transfer Drum .............................................................................................. 6-15
2.8 Cleaning the Dustproof Glass in the Laser Unit ................................................................ 6-16
2.9 Cleaning the Printer Interior............................................................................................... 6-17
2.10 Cleaning the Oil Pad........................................................................................................ 6-18
3. PERIODIC MAINTENANCE PARTS ............................................................. 6-19
4. PERIODIC MAINTENANCE PROCEDURES ................................................ 6-21
4.1 OPC Belt Cartridge Replacement...................................................................................... 6-21
4.2 Fusing Unit Replacement .................................................................................................. 6-23
4.3 Transfer Roller Replacement............................................................................................. 6-25
4.4 Paper Discharger Replacement ........................................................................................ 6-27
4.5 Drum Cleaner Replacement .............................................................................................. 6-29
4.6 Ozone Filter Replacement................................................................................................. 6-31
4.7 Paper Feeding Roller and Separator Pad Replacement ................................................... 6-32
4.8 Transfer Drum Replacement ............................................................................................. 6-33
4.9 Oil Pad Replacement......................................................................................................... 6-34
CHAPTER 7 DISASSEMBLY & RE-ASSEMBLY........................... 7-4
1. BEFORE STARTING DISASSEMBLY ........................................................... 7-4
1.1 Precautions.......................................................................................................................... 7-4
1.2 Preparation of Disassembly................................................................................................. 7-4
2. PARTS NAME ................................................................................................ 7-6
2.1 Cover ................................................................................................................................... 7-6
2.2 Circuit Boards (PCBs) ......................................................................................................... 7-7
2.3 Motor Units .......................................................................................................................... 7-7
2.4 Clutches and Solenoids ....................................................................................................... 7-8
2.5 Sensors ............................................................................................................................... 7-8
3. DISASSEMBLY FLOW................................................................................... 7-9
4. DISASSEMBLY PROCEDURE .................................................................... 7-10
4.1 Right Side of the Printer..................................................................................................... 7-10
4.2 Top of the Printer ............................................................................................................... 7-23
4.3 Left Side of the Printer ....................................................................................................... 7-32
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