Brother DCP6690CW Service Manual page 228

(2) Remove the three screws (two "a" and one "b" screws) from the main PCB shield and lift it
up.
Main-MJ (EXT)
harness*
Main-MJ (LINE)
harness*
Carriage motor
harness
ASF motor
harness
Paper feed motor
harness
PF encoder/registration sensor harness
"b"
SDAA
enclosure
Main PCB shield
"a"
"a"
ASF encoder harness
Lower cover
LT cover
Power supply harness
6-47
*
For MFC only
Purge cam switch harness
Cap lift cam switch harness
Ink cartridge detection
sensor harness
Ink empty sensor
harness
Main PCB
(6_39)
"a": Taptite, cup B M3x10
"b": Taptite, cup S M3x6
Confidential