Sharp MX-M350N / MX-M350U / MX-M450N / MX-M450U (serv.man5) Service Manual ▷ View online
MX-M350/M450 N/U MAINTENANCE AND DETAILS OF EACH SECTION 7 - 71
4) Remove the connector, and remove the screw.
5) Remove the screw, and remove the rear cabinet.
6) Remove the connector, the screw, and the angle. Remove the
snap band.
7) Remove the power unit.
a-1. Reactor PWB (200V only) / Filter PWB (Taiwan only)
1) Remove the power unit.
2) Remove the connector and the PWB supporter, and remove
the filter PWB.
(200V only)
(Taiwan only)
a-2. Power PWB
1) Remove the power unit.
2) Remove the connector, the screw, and the PWB supporter,
and remove the power PWB.
MX-M350/M450 N/U MAINTENANCE AND DETAILS OF EACH SECTION 7 - 72
a-3. Relay PWB
1) Remove the power unit.
2) Remove the connector and the bushing, and remove the filter
PWB mounting plate.
3) Remove the connector and the PWB supporter, and remove
the relay PWB.
b-1. Main switch
1) Pull out the No. 1 paper feed tray unit, and push up and
remove the front door.
2) Release the lock, and pull out the left door. Remove the screw,
and remove the front cover right.
3) Remove the screw, and remove the main switch mounting
plate.
4) Remove the connector, and remove the main switch.
b-2. Cooling fan motor
1) Remove the power unit.
2) Remove the connector and the screw, and remove the duct
holding cover.
3) Remove the screw, and remove the cooling fan motor.
∗
When installing the fan, check the indication arrow and note the
fan direction.
fan direction.
MX-M350/M450 N/U MAINTENANCE AND DETAILS OF EACH SECTION 7 - 73
b-3. Fuse PWB
1) Remove the screw, and remove the rear cabinet.
2) Remove the connector and the screw, and remove the inlet
mounting plate.
3) Remove the connector and the screw, and remove the fuse
PWB.
b-4. High voltage PWB
1) Remove the rear cabinet.
2) Remove the connector and the screw, and remove the PCU
PWB unit.
3) Remove the connector and the screw, and remove the high
voltage PWB.
12. PWB
A. Maintenance and parts replacement
a-1. MFP controller PWB
1) Remove the screw, and pull out the MFP controller PWB unit.
2) Remove the connector.
No.
Unit
Parts
a
1
MFP controller PWB
2
HDD (Option)
3
PCU PWB
4
Mother PWB
a-3
a-4
a-2
a-1
MX-M350/M450 N/U MAINTENANCE AND DETAILS OF EACH SECTION 7 - 74
3) Release the lock, and remove the MFP controller PWB unit.
4) Remove the screw, and remove the MFP controller PWB.
a-2. HDD (Option)
1) Remove the screw, and remove the right cabinet.
2) Remove the connector, and remove the screw.
3) Pull out the HDD unit.
4) Remove the screw, and remove the HDD cover.
5) Remove the screw, and remove the HDD angle.
a-3. PCU PWB
1) Remove the screw, and remove the rear cabinet.
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