3KH-2
1-5-1
1-5 Troubleshooting
1-5-1 Self-diagnosis
(1) Self-diagnostic function
This unit is equipped with a self-diagnostic function. When a problem is detected, printing is disabled and the problem dis-
played as a code consisting of C followed by a number, indicating the nature of the problem. A message is also displayed
requesting the user to call for service.
After removing the problem, the self-diagnostic function can be reset by turning front cover/feed cover switch off and back
on.
(2) Self diagnostic codes
Code
Contents
Remarks
Causes
Check procedures/corrective measures
C0030
Fax control PWB system problem
Processing with the fax software was
disabled due to a hardware or software
problem.
Defective fax con-
trol PWB.
Replace the fax control PWB and verify the
operation.
C0070
Fax control PWB incompatibility
detection problem
Fax software is not compatible with main
software.
FAX and the
machine are not
compatible.
Use the FAX control PWB that is designed
for use with the machine.
C0700
CF error for backup
Optional fax backup kit (CF) is not suit-
able as backup.
CF installed incor-
rectly.
Install CF correctly.
Defective CF.
Run the maintenance item U933 to initialize
the CF (see P.1-3-28).
C0830
Flash ROM program area checksum
error
A checksum error occurred with the pro-
gram in the Flash ROM on the fax con-
trol PWB.
Defective fax con-
trol PWB.
Upgrade the fax control PWB software (see
P.1-6-1). If the problem still remains, replace
the fax control PWB and check for correct
operation.
C0870
Fax control PWB to main PWB high
capacity data transfer problem
High-capacity data transfer between the
fax control PWB and the main PWB of
the machine was not normally performed
even if the data transfer was retried the
specified times.
Poor contact in the
connector termi-
nals.
Check the connection of connector YC1 on
the fax control PWB and YC4 on the inter-
face PWB, connection of connector YC30
on the main PWB and YC6 on the interface
PWB and the continuity across the connec-
tor terminals. Repair or replace if necessary.
Defective fax con-
trol PWB or main
PWB.
Replace the fax control PWB or main PWB
and check for correct operation.
C0880
Fax control PWB program archive
problem
When power is turned on, the com-
pressed program in the Flash ROM on
the fax control PWB was not success-
fully decompressed.
Defective fax con-
trol PWB.
Replace the fax control PWB and check for
correct operation.
C0920
Fax file system error
The backup data is not retained for file
system abnormality of flash memory of
the fax control PWB.
Defective fax con-
trol PWB.
Turn the main power switch off and then
back on again. If the problem still remains,
replace the fax control PWB and verify the
operation.
F090
Communication error between main
PWB and Fax control PWB
A communication error between fax con-
trol PWB and main PWB is detected.
Defective main
PWB.
Turn the main power switch off and then
back on again. If the problem still remains,
replace the main PWB.
Summary of Contents for FaxSystem(M)
Page 1: ...SERVICE MANUAL Published in March 2007 843KH113 3KHSM063 Rev 3 FaxSystem M...
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Page 12: ...3KH 2 2 2 Operation of the PWBs 2 2 1 Fax control PWB 2 2 1 2 2 2 NCU PWB 2 2 5...
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