Removing The High Voltage Power Supply Pcb - Canon MF720 Series Service Manual

3. Remove the DC Controller PCB [1].
• 8 connectors [2]
• 5 screws [3]
[3]
8x
5x
[1]
[3]
[2]
■ After Replacing the DC Controller
PCB
1. In service mode, perform the following procedure to
restore the DC Controller setting values.
COPIER > FUINCTION > VIFFNC > RSTR-DCN
When restoration is executed, "ACTIVE" will be
displayed, and then "OK!" will be displayed in about 2
minutes at the completion of restoration.
2. When backup data cannot be uploaded before
replacement due to reasons such as damage of the
DC Controller PCB, enter the value of each service
mode item described on the service label.
3. Turn OFF and then ON the power.
4. Configure the following settings from the Control
Panel.
• Menu > Adjustment/Maintenance > Print Color
Displacement Correction
• Menu > Adjustment/Maintenance > Auto Gradation
Correction > Quick Correction
5. Turn OFF and then ON the power.
Removing the High Voltage
Power Supply PCB
■ Preparation
1. Removing the Right Cover.(Refer to
Right Cover" on page
2. Removing the Left Cover.(Refer to
Left Cover" on page
3. Removing the Rear Upper Cover.(Refer to
"Removing the Rear Upper Cover" on page
4. Removing the ADF Unit + Reader Unit.(Refer to
"Removing the ADF Unit + Reader Unit" on page
130)
[3]
[2]
[2]
[2]
"Removing the
120)
"Removing the
118)
123)
5. Removing the Right Front Cover.(Refer to
"Removing the Right Front Cover" on page
6. Removing the Upper Cover.(Refer to
Upper Cover" on page
■ Procedure
1. Remove the Harness Cover Plate [1].
• 2 screws [2]
[3]
2x
2. Remove the harness guide [1].
• 6 claws [2]
6x
[2]
[2]
3. Disconnect the flat cable [1].
1x
163
4. Disassembly/Assembly
"Removing the
125)
[2]
[1]
[2]
[1]
[2]
[2]
[1]
121)
[2]