Brother FAX 2800 - B/W Laser - Fax Service Manual page 32

CHAPTER 4 DISASSEMBLY/REASSEMBLY AND LUBRICATION
4.1 DISASSEMBLY/REASSEMBLY......................................................................................4-1
Safety Precautions .......................................................................................................4-1
Tightening Torque List......................................................................................................4-2
Preparation ..................................................................................................................4-3
How to Access the Object Component ........................................................................4-3
Disassembly Order Flow..............................................................................................4-4
4.1.1 Document Guide Base .........................................................................................4-5
4.1.2 Board Access Cover.............................................................................................4-5
4.1.3 Auto Sheet Feeder (ASF).....................................................................................4-6
4.1.4 Handset Mount and Control Panel ASSY...........................................................4-12
4.1.5 Panel Rear Cover and Control Panel .................................................................4-14
4.1.6 Top Cover...........................................................................................................4-17
4.1.7 CIS Unit ..............................................................................................................4-19
4.1.8 Hook Switch PCB ...............................................................................................4-20
4.1.9 Document Feed Roller ASSY, Scanner Drive Unit, and Document Ejection
Roller ASSY........................................................................................................4-21
4.1.10 Separation Roller and its Gear ...........................................................................4-23
4.1.11 Heat-fixing Unit, FU Lamp, and Paper Ejection Sensor Actuator.......................4-25
4.1.12 Laser Unit and Toner Sensor PCB.....................................................................4-27
4.1.13 Main PCB ...........................................................................................................4-28
4.1.14 Bottom Plate.......................................................................................................4-30
4.1.15 Low-voltage Power Supply PCB.........................................................................4-31
4.1.16 High-voltage Power Supply PCB........................................................................4-32
4.1.17 Duct and Fan......................................................................................................4-33
4.1.18 Top Cover Sensor Actuator................................................................................4-34
4.1.19 Power Supply Shield ..........................................................................................4-34
4.1.20 Speaker ..............................................................................................................4-35
4.1.21 Gear Drive Unit...................................................................................................4-36
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