Relay Pcb - Brother IntelliFax-3550 Service Manual

1.16 Relay PCB

(1) Remove the screw.
(2) Slightly lift up the relay PCB and disconnect the following four things:
• Toner sensor harness (4-pin), P4
• Laser diode harness (5-pin), P3
• Polygon motor flat cable (5-pin), P2
• Relay–high-voltage flat cable (12-pin), P1
Toner sensor
harness
Laser diode
harness
Reassembling Notes
• When reinstalling the relay PCB, be sure that corner "X" shown above comes directly un-
der the shield bracket.
Shield bracket
P3
IV – 21
This corner should come directly
under the shield bracket.
Relay PCB
"X"
Polygon motor flat cable
Toner sensor harness
Registration sensor
PC1
Polygon motor flat cable
Sheet feeder cover sensor
PC2
Cover sensor
Relay–high-voltage flat cable
Relay–high-voltage
flat cable
Laser diode harness