Brother International IntelliFax-3550 Service Manual - Page 71

Polygon motor flat cable 5-pin, P2, Relay-high-voltage flat cable 12-pin, P1

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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 Shield bracket This corner should come directly under the shield bracket. Relay PCB "X" Toner sensor harness Laser diode harness P4 P2 PC1 P3 PC2 P1 SW1 Relay-high-voltage flat cable Laser diode harness Polygon motor flat cable Toner sensor harness Registration sensor Polygon motor flat cable Sheet feeder cover sensor Cover sensor Relay-high-voltage flat cable s Reassembling Notes • When reinstalling the relay PCB, be sure that corner "X" shown above comes directly under the shield bracket. IV - 21

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IV –
21
PC1
PC2
P3
P2
P4
P1
SW1
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
Registration sensor
Polygon motor flat cable
Sheet feeder cover sensor
Cover sensor
Relay–high-voltage flat cable
This corner should come directly
under the shield bracket.
Relay PCB
Toner sensor harness
Toner sensor
harness
Laser diode
harness
Shield bracket
■
Reassembling Notes
•
When reinstalling the relay PCB, be sure that corner "X" shown above comes directly un-
der the shield bracket.
"X"
Polygon motor flat cable
Laser diode harness
Relay–high-voltage
flat cable