Canon imageCLASS MF8450c, Service Manual

Page: 225 / 349

Chapter 10
10-23
F-10-59
2) Remove the DC controller PCB [1].
- 4 screws [2]
F-10-60
10.5.13.3 Procedure after Replacing the DC controller
PCB
0021-0347
imageCLASS MF9170c / imageCLASS MF9150c / imageCLASS MF8450c
After replacing the DC controller PCB, restore the backup data from the
main controller PCB.
1) Using the service mode, restore the backup data of the DC controller
stored in NVRAM of the main controller PCB to NVRAM of the DC con-
troller PCB.
COPIER> FUNCTION> VIFFNC> RSTR-DCN
2) Execute "Initial Setting/Registration > Adjustment/Cleaning > Automatic
Gradation Correction > Full Correction".
10.5.14 Memory Controller PCB
10.5.14.1 Before Removing the Memory Controller PCB
0020-3352
imageCLASS MF9170c / imageCLASS MF9150c / imageCLASS MF8450c
1) Remove the ETB unit. (page 7-31) Reference [Removing the ETB Unit]
2) Remove the rear cover unit. (page 10-11) Reference [Removing the Rear
Cover Unit]
3) Remove the left cover. (page 10-13) Reference [Removing the Left Cov-
er]
4) Remove the right cover. (page 10-11) Reference [Removing the Right
Cover]
5) Remove the Electrical Components Cover. (page 10-15) Reference [Re-
moving the Electrical Components Cover]
6) Remove the Controller Box. (page 10-15) Reference [Removing the Con-
troller Box]
7) Remove the Off Hook PCB. (only of the machine with FAX) (page 10-
25) Reference [Removing the Off Hook PCB]
8) Remove the DC Controller PCB. (page 10-22) Reference [Removing the
DC Controller PCB]
9) Remove the Laser Scanner Cover. (page 10-16) Reference [Removing the
Laser Scanner Cover]
10.5.14.2 Removing the Memory Controller PCB
0019-5777
imageCLASS MF9170c / imageCLASS MF9150c / imageCLASS MF8450c
1) Remove the memory controller PCB [1].
- 4 connectors [2]
- 3 screws [3]
F-10-61
10.5.15 Duplexing Driver PCB
10.5.15.1 Before Removing the Duplex Driver PCB
0019-5742
imageCLASS MF9170c / imageCLASS MF9150c / imageCLASS MF8450c
1) Remove the ETB unit. (page 7-31) Reference [Removing the ETB Unit]
2) Remove the rear cover unit. (page 10-11) Reference [Removing the Rear
Cover Unit]
3) Remove the right cover. (page 10-11) Reference [Removing the Right
Cover]
10.5.15.2 Removing the Duplex Driver PCB
0019-5743
imageCLASS MF9170c / imageCLASS MF9150c / imageCLASS MF8450c
1) Remove the duplex driver PCB [1].
- 3 connectors [2]
- 3 screws [3]
F-10-62
10.5.16 Low-voltage Power Supply PCB
10.5.16.1 Before Removing the Low-Voltage Power
Supply PCB
0019-5738
imageCLASS MF9170c / imageCLASS MF9150c / imageCLASS MF8450c
[1]
[1]
[2]
[2]
[1]
[2]
[2]
[1]
[2]
[1]
[2] [2]
MEMO:
19 parts (e.g.: external cover, unit) need to be removed when removing the
low voltage power supply PCB. Be sure to have enough space equivalent to
1,700mm x 1,100mm for storing parts.
[1]
[3]
[2]
[1]
[2]
[2] [3] [3]