Brother MFC640CW - Page 137

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(3) Remove screw "a" from the MJ shield and take it off the lower MJ/PS shield.
(4) Remove the power supply shield.
(5) Remove four screws ("c1" through "c4") from the power supply PCB.
(6) Remove screw "b" from the MJ PCB and take it off the lower MJ/PS shield.
MJ-line harness (2-pin)
"a"
"b"
MJ PCB
MJ shield
"c3"
"c2"
"c4"
"c1"
Power supply PCB
Power supply shield
Lower MJ/PS shield
MJ-main harness 1 (2-pin)
MJ-main harness
MJ-line harness
Power cord
MJ/PS shield box
Power supply PCB
NOTE: Tighten "c1" through "c4"
screws in this order.
"a": Screw, pan (washer) M3x8DB
"b" and "c1" through "c4": Taptite, cup S M3x6
 Reassembling Notes
• When securing the power supply PCB, tighten "c1," "c2," "c3," and "c4" screws in this order.