Brother DCP6690CW Service Manual page 206

(26) Press the lock arm and pull the left edge of the document sensor PCB to the front and
upwards to remove the PCB. Then disconnect the document sensor PCB harness from the
PCB.
(27) Press the two PCB supports and remove the document width sensor PCB. Then disconnect
the document width sensor harness from the PCB.
Document width sensor PCB
Document width sensor harness
(Rear)
PCB supports
Document sensor PCB harness
Lock arm
6-25
Document sensor PCB
Lower ADF chute
(6_26_2)
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