Errors - Canon DADF-H1 Service Manual

CHAPTER 5 TROUBLESHOOTING

5.4 Errors

Error indications can be viewed on the display screen on the host.
The table below lists the codes that may be displayed on the host screen, along with their
definitions.
E420
Main causes • ADF controller PCB fault
• EEPROM error
How to detect • Backup data could not be read or backup data read was found in error
when the power to the to the host was turned on.
E421
Main causes • ADF controller PCB fault
• EEPROM error
How to detect • Backup data could not be written to EEPROM.
E421
Main causes • ADF controller PCB fault
• EEPROM error
How to detect • Backup data written to EEPROM was found in error.
E422
Main causes • IPC communication error
• Disrupted communication line
• ADF controller PCB fault
How to detect • Communication between the ADF and the host has been interrupted for 5
seconds or longer while the ADF stood by.
• Communication between the ADF and the host has been interrupted for
0.5 second or longer while the ADF was running.
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COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON DADF-H1 REV.0 MAR. 2001