Canon GP405 Service Handbook page 161

Code Detail
The communication between the machine
E601
and the SCSI board has a fault.
0000
0001
0002
0003
0004
0005
0006
0007
0008
0010
The SCSI fuse has blown.
E603
The image memory has a fault.
E604
• The RAM has a fault.
• The expansion memory is not mounted
The image memory battery has a fault.
E605
• The battery has a fault. (The image
The fax unit has a fault.
E674
• The chip has a fault.
• The fax unit has poor connection.
Cause
properly.
memory battery is an accessory to the
FAX board.)
CHAPTER 5 SELF DIAGNOSIS
Description
An error exists in the
communication between the
SCSI-CPU and the IP-CPU.
If the response from the SCSI
board has an error when the
machine sends a command to
the SCSI board.
When an initial check is made
for communication.
When an initial check is made
for communication.
When a check is made for
communication initialization.
When a check is made for
communication initialization.
When a check is made for
communication initialization.
If no response comes from the
SCSI board within a specific
time when the machine sends a
command to the SCSI board.
If no response comes from the
machine to the SCSI board
within a specific time.
If the machine has sent NAK
three times or more in response to
a command from ACSI board.
If the SCSI board has sent NAK
three times or more when it sends
a command to the machine.
The SCSI fuse has blown.
A write fault is detected when
image data is written to the
image memory.
The voltage of the image
memory battery is lower than a
specific value (if after an
adequate charging time and the
power was turned on within a
charge life).
An error is detected when
writing to the chip while
receiving a fax message.
5-7