Brother DCP-6690CW, Service Manual, Page: 186 / 506

6-5 Confidential
„
Disassembly Flowchart
Sensors, encoders, and thermistors
(Note 1) The ADF unit has the document width sensor PCB and document sensor PCB (having document front and rear
sensors).
(Note 2) The control panel PCB has the scanner cover sensor and ink cartridge cover sensor.
(Note 3) The duplex unit has the switchback paper detection sensor, DX cam switch, and DX cover sensor.
(Note 4) The engine unit has the registration sensor PCB and PF encoder PCB.
(Note 5) The carriage PCB in the head/carriage unit has the paper width sensor, head thermistor, and CR encoder sensor.
(Note 6) The ink refill ASSY has the ink cartridge detection sensor PCB (having four ink cartridge detection sensors) and ink
empty sensor PCB (having four ink empty sensors and the casing internal temperature thermistor).
(Note 7) The maintenance unit has the purge cam switch and cap lift cam switch. The ASF motor unit has the ASF encoder
sensor.
Control panel ASSY
Scanner cover
(Scanner unit)
(including ADF)
ADF & document
cover ASSY
Scanner cover
support/damper
Speaker
Main PCB shield
Main PCB
CR encoder strip
Head cover
Print head
Ink refill ASSY
Maintenance unit
Flushing box
Power supply PCB
MJ PCB
Carriage PCB ASSY
Ink absorber felt
Ink absorber box
PF encoder disk
LT cover
Outer back cover
Duplex unit
WLAN PCB
Media module cover
Ink cartridge cover
Front cover
LT paper pull-in
roller ASSY
Main PCB
shield frame
Backup battery
Side cover L/R
Disassembly of
ADF & document
cover ASSY
Upper cover
Paper tray ASSY #1 Paper tray ASSY #2
80/80
30/30
25/25
35/55
10/10
10/10
10/20
15/15
15/15
5/5
5/5
5/5
5/5
5/10 5/10
30/10
20/20
15/20
30/50
20/50
50/50
35/35
35/35
35/40 - / - 35/40
75/90
15/10
25/25
20/20
10/10
10/10
10/10
45/45
Disassembly/reassembly
standard time (seconds)
*4
*2
*1
*3
6.1.1
6.1.4
6.1.7
6.1.7
6.1.7 6.1.8
6.1.8
6.1.8
6.1.7
6.1.9
6.1.9
6.1.9
6.1.12
6.1.12
6.1.12 6.1.12
6.1.16 6.1.15
6.1.14
6.1.10
6.1.10
6.1.10
6.1.11
6.1.11
6.1.8
(Note 6)
(Note 7)
(Note 5)
(Note 2)
(Note 1)
6.1.12
6.1.13 6.1.13
6.1.13
6.1.5, 6.1.6
6.1.2 6.1.3 6.1.17 6.1.18
Engine unit
30/40
6.1.15
(Note 4)
(Note 3)
*4 For MFC only
*2 For models with backup battery
*3 For duplex print models
*1 DX paper tray ASSY #1 on duplex print models