Brother DCP6690CW Service Manual page 189

(3) Disconnect the CIS flat cable from the main PCB, pull it to the rear through the two flat
cores, and then release it from the cable guides. Unlatch the flat cores and take them out of
the upper cover.
Note: After disconnecting the flat cable(s), check that each cable is not damaged at its end
or short-circuited. When connecting the flat cable(s), do not insert it at an angle. After
insertion, check again that it is not at an angle.
(4) Release the two grounding wires by removing the screw.
(5) Disconnect the following harnesses from the main PCB.
- ADF motor harness (4-wire)
- CIS motor harness (4-wire)
- Document sensor PCB harness (5-wire)
- Document width sensor harness (3-wire
Document width sensor
harness
Upper cover
Document sensor PCB harness
(5-wire)
Document width
sensor harness
1 2
(3-wire* , 4-wire* )
ADF motor harness
(4-wire)
CIS motor harness
(4-wire)
*1
*1 For models destined for countries except Japan
*2 For Japanese models
Taptite, cup S M3x6
LT cover
6-8
*2
, 4-wire )
ADF motor harness
CIS motor harness
Grounding wire (for CIS motor)
Grounding wire (for ADF drive unit)
CIS flat cable (16-wire)
Main PCB
Scanner cover
(Scanner unit)
CIS flat cable
Flat cores
Latch
Document sensor
PCB harness
(6_05)
(BH9_Main_PCB_2)
Confidential