Brother HL-3450CN Service Manual page 6

TABLE OF CONTENTS
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 .............................................................................................6-26
4.4 Paper Discharger Replacement.........................................................................................6-28
4.5 Drum Cleaner Replacement ..............................................................................................6-30
4.6 Ozone Filter Replacement .................................................................................................6-32
4.7 Paper Feeding Roller and Separator Pad Replacement....................................................6-33
4.8 Transfer Drum Replacement..............................................................................................6-34
4.9 Oil Pad Replacement .........................................................................................................6-35
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 (PWBs) .........................................................................................................7-7
2.3 Motor Units...........................................................................................................................7-7
2.4 Clutches ...............................................................................................................................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
4.4 Paper Exit Unit ...................................................................................................................7-42
4.5 Front of the Printer .............................................................................................................7-47
4.6 Rear of the Printer..............................................................................................................7-50
4.7 Fusing Unit .........................................................................................................................7-54
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