Brother MFC990CW Service Manual page 183

CHAPTER 6 DISASSEMBLY/REASSEMBLY AND LUBRICATION
This chapter details procedures for disassembling and reassembling the machine together with related
notes. The disassembly order flow provided enables you to see at a glance the quickest way to get to
component(s) involved.
At the start of a disassembly job, you check the disassembly order flow that guides you through a
shortcut to the target components.
This chapter also covers screw tightening torques and lubrication points to which the specified
lubricants should be applied during reassembly jobs.
6.1 DISASSEMBLY/REASSEMBLY ............................................................................. 6-1
Safety Precautions.............................................................................................. 6-1
Tightening Torque ............................................................................................... 6-2
Preparation ......................................................................................................... 6-3
How to Access the Target Component................................................................ 6-4
Disassembly Flowchart ....................................................................................... 6-5
6.1.1 Jam Clear Cover ....................................................................................... 6-6
6.1.2 Scanner Cover (Scanner Unit) .................................................................. 6-7
6.1.3 ADF & Document Cover ASSY (Document Cover) (for models with ADF),
Document Cover (for models without ADF)............................................... 6-17
6.1.4 Disassembly of ADF & Document Cover ASSY (for models with ADF) .... 6-20
6.1.5 Control Panel ASSY .................................................................................. 6-31
6.1.6 Disassembly of Control Panel ASSY......................................................... 6-33
6.1.7 Charge Stand ASSY (for models with cordless handset) .......................... 6-39
6.1.8 Backup Battery (for models with backup battery), Speaker
(for models with speaker), Upper Cover, and Encoder Guard Film........... 6-41
6.1.9 Antenna & Cordless PCB ASSY (for models with cordless handsets)...... 6-46
6.1.10 Ink Cartridge Cover, Inner Media Module Cover, Front Cover,
and WLAN PCB (for WLAN-enabled models) ........................................... 6-48
6.1.11 Main PCB .................................................................................................. 6-50
6.1.12 MJ/PS Shield Unit (MJ PCB* and Power Supply PCB)............................. 6-54
6.1.13 Hook Switch PCB (for models with handset)............................................. 6-62
6.1.14 Head/Carriage Unit and Ink Refill ASSY ................................................... 6-64
6.1.15 Ink Absorber Box, Ink Absorber Felts, and PF Encoder Disk.................... 6-76
6.1.16 Engine Unit and Flushing Box ................................................................... 6-78
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