Brother International IntelliFax-3550 Service Manual - Page 54

Disassembly Order Flow, Scanner frame ASSY

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s Disassembly Order Flow IV - 4 1 Top cover 2 Handset mount* Side cover** 2 Hook switch PCB* 3 Multi-purpose sheet feeder 11 Laser unit 13 Low-voltage power supply PCB 12 Bottom plate 14 15 High-voltage power supply PCB Main PCB 14 Fan 1 16 Relay PCB 18 Gear drive unit Main motor Solenoids Gears 19 - Duct cover - Fan 2 - Speaker *For handset-equipped versions **For non-handset versions 17 Shield bracket 20 Cover sensor actuator 17 NCU PCB ASSY 20 • Sheet feeder cover sensor actuator • Registration sensor actuator 21 Microphone (MFC9500 only) 4 Control panel ASSY 5 Panel rear cover - Document pressure bar - ADF parts - Nip-related parts Control panel - Control panel PCB - FPC key 6 Document feed roller ASSY 6 Document ejection roller ASSY 7 Inner cover 8 Scanner frame ASSY Mirrors Ejection leaf spring Scanner motor Pressure roller ASSY Document sensor PCB Document sensor actuators Separation roller ASSY Document take-in roller ASSY 9 Insulation cover 10 Fixing unit FU lamp 10 Paper ejection sensor actuator

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IV –
4
■
Disassembly Order Flow
Control panel ASSY
4
5
Panel rear cover
- Document pressure
bar
- ADF parts
- Nip-related parts
Control panel
- Control panel PCB
- FPC key
6
6
Document feed
roller ASSY
Document ejection
roller ASSY
7
Inner cover
8
Scanner frame ASSY
Document sensor PCB
Document sensor actuators
Separation roller ASSY
Document take-in roller
ASSY
Mirrors
Ejection leaf
spring
Scanner motor
Pressure roller
ASSY
• Sheet feeder
cover sensor
actuator
• Registration
sensor actuator
20
17
NCU PCB ASSY
20
Cover sensor
actuator
Shield bracket
17
16
Relay PCB
Main PCB
15
- Duct cover
- Fan 2
- Speaker
19
Fan 1
14
High-voltage
power supply PCB
13
Bottom plate
12
Multi-purpose
sheet feeder
3
1
Top cover
11
Laser unit
Low-voltage
power supply
PCB
18
Gear drive unit
Main motor
Gears
Solenoids
14
2
2
Handset mount*
Side cover**
Hook switch PCB*
*For handset-equipped versions
**For non-handset versions
Microphone
(MFC9500 only)
21
10
Fixing unit
FU lamp
10
9
Insulation cover
Paper ejection sensor actuator