High-Voltage Power Supply Pcb And Fan 1 - Brother IntelliFax-3550 Service Manual

1.14 High-voltage Power Supply PCB and Fan 1

(1) Remove the screw and the insulation film.
(2) While pressing down the high-voltage power supply PCB, slightly shift it to the front of
the machine.
(3) Slightly lift up the high-voltage power supply PCB and disconnect the following four
things:
• Relay–high-voltage flat cable (12-pin)
• Eraser harness (4-pin)
• Fan harness (3-pin)
• Drum grounding harness (2-pin)
NOTE: The fan harness and the drum grounding harness pass through the slot below
(4) Take out the fan 1.
High-voltage power supply PCB
Relay–high-voltage flat cable
Main cover
(placed upside
down)
(Front)
Reassembling Notes
• Before reinstalling the high-voltage power supply PCB, check the high-voltage contacts
for any toner particles, paper dust or dirt, and clean them out.
• When reassembling the above parts, make sure that the harnesses are routed on the
main cover as illustrated in Section 1.23.
• Once the fan motor film is removed, you are recommended to use a new film.
• When setting the fan 1, be careful with the installation direction. The name plate should
be face-up (when the equipment is placed upside down).
the fan motor film.
Eraser harness
Fan motor film
Insulation film
Fan 1
IV – 18
Paper ejection
sensor
Fan harness
Drum grounding
harness