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1-3-2 Self-diagnosis
(1) Self-diagnostic function
When a problem is detected in the paper feed desk, copying is disabled and the problem displayed on the operation unit of
the copier as a code consisting of "C" followed by a number between 0420 and 2600, indicating the nature of the problem.
After removing the problem, the self-diagnostic function can be reset by turning the desk safety switch off and back on.
(2) Self diagnostic codes
Code
C0420
Communication problem
An error code from the paper feed desk
is detected eight times in succession.
No communication: there is no reply
after 3 retries.
Abnormal communication: a
communication error (parity or
checksum error) is detected five times
in succession.
C1030
Desk upper lift motor problem
When the upper drawer of the paper
feed desk is inserted, the desk upper lift
limit switch does not turn on within 6 s
of the desk upper lift motor turning on
and the desk upper lift limit switch does
not turn on by turning off the desk
upper lift motor for 200 ms and retrying
twice.
During copying, the desk upper lift limit
switch does not turn on within 200 ms
of the desk upper lift motor turning on.
Contents
Causes
Check procedures/corrective measures
Poor contact of
Check the connection of connectors CN3
the connector
on the copier main PCB and CN5 on the
terminals.
desk main PCB, and the continuity across
the connector terminals. Remedy or
replace if necessary.
Defective copier
Replace the copier main PCB and check
main PCB.
for correct operation.
Defective desk
Replace the desk main PCB and check for
main PCB.
correct operation.
Broken gears or
Replace the desk upper lift motor.
couplings of the
desk upper lift
motor.
Defective desk
Check for continuity across the coil. If
upper lift motor.
none, replace the desk upper lift motor.
Poor contact of
Reinsert the connector. Also check for
the desk upper lift
continuity within the connector cable. If
motor connector
none, repair or replace the cable.
terminals.
Defective desk
Check if CN1-5 on the desk main PCB
upper lift limit
goes low when the desk upper lift limit
switch.
switch is turned off. If not, replace the desk
upper lift limit switch.
Poor contact of
Reinsert the connector. Also check for
the desk upper lift
continuity within the connector cable. If
limit switch
none, repair or replace the cable.
connector
terminals.
Remarks
3CC
1-3-5
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