Adjustment Of Electrical Parts; When Replacing The Engine Controller Pcb; When Replacing The Main Controller Pcb - Canon Color imageRUNNER LBP5280 Service Manual

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Troubleshooting > Standard/Adjustment > Adjustment of Electrical Parts > When Replacing the Main Controller PCB

Adjustment of Electrical Parts

■ When Replacing the Engine Controller PCB

NVRAM information on the DC Controller PCB is stored in the NVRAM on the Main Controller
PCB as a backup.
The data that has been backed up can be restored to the NVRAM on the DC Controller PCB
in the service mode.
1) Execute the following: service mode > FUNCTION GR.>RESTORE DCON.
2) Turn OFF and then ON the power of the host machine.

■ When Replacing the Main Controller PCB

Because setting values, management data of this machine and the MEAP application, etc.
are stored in the flash memory of the Main Controller PCB, they need to be backed up before
replacing the Main Controller PCB. However, when the Main Controller PCB cannot operate
normally because of flash memory failure or system error, the above data cannot be backed
up.
Also, restoration of the backup data and reinstallation of the MEAP application is necessary
after replacing the Main Controller PCB.
Setting values of this machine: User mode setting values, service mode setting values
Management data of this machine: Page counter, device serial number
1 Backup and restoration of data using Expansion ROM for servicing and Sublog Board (or
Sublog Board attached with the Expansion ROM hereafter)
While setting values and management data can be backed by this method, the MEAP
application cannot be backed up by the method. Therefore, reintallation of the MEAP
application is necessary after replacing the PCB and then restoring the backup data.
2 Backup and restoration of data using USB memory
Only setting values can be backed up by this method. Therefore, reintallation of the MEAP
application is necessary after replacing the PCB and then restoring the backup data.
3 When data cannot be backed up before replacement due to Main Controller PCB error
Reintallation of the MEAP application is necessary after replacing the PCB.
● 1 Backup and restoration of data using Sublog Board attached with
Expansion ROM and copy of data using laptop PC for servicing
1-1 Actions before replacing the PCB
1-1-1 Preparation required for reinstalling the MEAP application
For details on preparation required for reinstalling the MEAP application, refer to the
5 Troubleshooting > Standard/Adjustment > Adjustment of Electrical Parts > When Replacing the Main Controller PCB
Service Manual > Chapter 2 Technical Description > MEAP > Maintenance > Procedure for
reinstalling MEAP applications after replacing the PCB.
1-1-2 Backing up to Sublog Board attached with the Expansion ROM
For details on backup to Sublog Board attached with the Expansion ROM, refer to the Service
Manual > Chapter 5 Troubleshooting > Backup/Restoration by Expansion ROM for servicing
and Sublog Board
• Turn OFF the power.
• Install the Expansion ROM for servicing to the Sublog Board.
• Install the Sublog Board attached with the Expansion ROM to the Main Controller PCB.
• Turn ON the power.
• When turning ON the power, "NVRAM export" is displayed on the Control Panel.
• Press the down arrow key.
• The data of the Main Controller PCB is backed up to the Sublog Board attached with the
Expansion ROM.
1-2 Replacing the PCB
• Turn OFF the power.
• Replace the Main Controller PCB with a new one (service part).
• Install the Sublog Board attached with the Expansion ROM to the Main Controller PCB.
1-3 Restoring data after replacing the PCB
Perform the following operation to restore data backed up in the Sublog Board attached with
the Expansion ROM to the Main Controller PCB.
• Turn ON the power.
• When the menu is displayed on the Control Panel upon turning ON the power, select
"NVRAM import".
• Press the down arrow key.
• Data backed up in the Sublog Board attached with the Expansion ROM is restored to the
Main Controller PCB.
• Turn OFF the power, and remove the Sublog Board attached with the Expansion ROM.
1-4 Reinstalling the MEAP application and importing user information
For details on preparation required for reinstalling the MEAP application and importing
user information, refer to the Service Manual > Chapter 2 Technical Description > MEAP >
Maintenance > Procedure for reinstalling MEAP applications after replacing the PCB.
● 2 Backup and restoration of data using USB memory and copy of
data using laptop PC for servicing
2-1 Actions before replacing the PCB
2-1-1 Preparation required for reinstalling the MEAP application
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