Canon imageRUNNER ADVANCE C5255 Series Service Manual page 406

4
Parts Replacement and Cleaning > Main Controller > Removing the Main Controller PCB 2 > Preparations
5) Press the [C] key to return to the download Menu (HDD).
6) Press the [Reset] key to shut down the host machine.
CAUTION:
If mismatch between the box management information included in the SRAM data and
box data on the HDD occurs, which is caused by starting the machine normally without
restoring SRAM data after replacing the Main Controller 2 PCB, the box management
information is initialized. As a result, box documents on the HDD are deleted.
Therefore, be sure to back up the box documents on remote UI.
● Temporarily backing up SRAM data to an HDD (only when the HDD
Data Encryption Kit is not installed)
1) Service mode (Lv1) > COPIER > FUNCTION > SYSTEM > DOWNLOAD > OK
2) When the download Menu (HDD) appears, press the [5] key on the Control Panel.
3) When the Backup Menu (HDD) appears, press the [6] key on the Control Panel.
[[[[[ Backup Menu (HDD) ]]]]]]
------------------------------------
[6]: SRAM(HDD)
[C]: Return to Main Menu
4) Press the [0] key to confirm, and then the SRAM data is stored in the internal HDD.
5) Press the [C] key to return to the download Menu (HDD).
6) Press the [Reset] key to shut down the host machine.
CAUTION:
If mismatch between the box management information included in the SRAM data and
box data on the HDD occurs, which is caused by starting the machine normally without
restoring SRAM data after replacing the Main Controller 2 PCB, the box management
information is initialized. As a result, box documents on the HDD are deleted.
Therefore, be sure to back up the box documents on remote UI.
4 Parts Replacement and Cleaning > Main Controller > Removing the Main Controller PCB 2 > Preparations
■ Preparations
● Remove the Left Rear Cover and the Left Rear Sub Cover.
1) Remove the Left Rear Cover.
• 2 rubber caps
• 2 screws
• 5 claws
F-4-64
Rubber cap
x2
x5
Rubber cap
4-86
Claws
F-4-65
4-86