Canon GP405 Service Manual page 502

CHAPTER 14 TROUBLESHOOTING
22 E300 (Downloading data has an error.)
Cause
Downloading data
(selected)
Downloading data
23 E315 (The image data coding mechanism has a fault.)
Cause
Image memory.
J706
Image processor
PCB
24 E601 (The communication between the SCSI board and the machine has a fault.)
Cause
PCB
SCSI board
System
motherboard
25 E603 (The SCSI fuse has an open circuit.)
Cause
Fuse
Is there continuity
in the fuse on the
SCSI board?
14-84
Step Check
1 Is the data compatible with the
machine model?
Step Check
1 Turn off and then on the main
power. Is the problem corrected?
2 Re-connect the expansion image
memory (J723, J724). Is the
problem corrected?
3 Is the connector J706 on the image
processor PCB connected poorly?
Step Check
1 Turn off and then on the main
power.
2 Is the SCSI board firmly connected
to the system motherboard?
Replace the SCSI board. Is the
problem corrected?
Step Check
1 Turn off and then on the main
power. Is the problem corrected?
2 Is there electrical continuity in the
fuse on the SCSI board?
COPYRIGHT © 1999 CANON INC. CANON 405/335 REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Yes/No Action
NO Select the correct data.
YES Install the downloading
tool.
Yes/No Action
YES End.
YES End.
YES Connect it securely.
NO Replace the image
processor PCB.
Yes/No Action
YES End.
NO Correct the connection.
YES End.
Replace the system
motherboard image
processor PCB.
Yes/No Action
YES End.
NO Replace the fuse.
YES Replace the SCSI board.