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1-4-2
Self-diagnosis
(1) Self-diagnostic function
When a problem is detected in the side feeder, copying is disabled and the machine operation section displays a code
consisting of "C" followed by a number, indicating the nature of the problem.
After removing the problem, the self-diagnostic function can be reset by reattaching the side feeder.
(2) Self diagnostic code
Code
C0420
Side feeder communication error
• A communication error from side
feeder is detected 10 times in succes-
sion.
C0700
Side feeder EEPROM error
• An error occurs in EEPROM (U4) data
read or write for the side feeder main
PWB.
C1140
Side feeder lift motor going up error
(optional side feeder)
• Upper limit detection switch does not
turn off within 15 s of the side feeder
lift motor starting (within 200 ms during
paper feeding). This error is detected
four times successively.
Y110900-9
Contents
Causes
Check procedures/corrective measures
Poor contact in the
Check the connection of connector YC15 on
connector termi-
the engine PWB and the connector YC3 on
nals.
the side feeder main PWB, and the continu-
ity across the connector terminals. Repair or
replace if necessary.
Defective engine
Replace the engine PWB.
PWB.
Defective side
Replace the side feeder main PWB.
feeder main PWB.
Defective side
Replace the side feeder main PWB.
feeder main PWB.
Poor contact of
Reinsert the connector. Also check for conti-
upper limit detec-
nuity within the connector cable. If none,
tion switch connec-
repair or replace the cable.
tor terminals.
Defective side
Replace the side feeder main PWB.
feeder main PWB.
Defective side
Run maintenance mode U247 and measure
feeder lift motor.
the voltage between terminals YC5-A12
(side feeder main circuit board) and YC6-
B11. (Make sure all of LUSSW, UCSSW,
LLSSW and RCSSW are off.)
Despite either DC24V or DC-24V is
observed but if the side feeder lift motor
does not operate, replace the side feeder lift
motor.
Service Manual
Remarks
3MV
1-4-3
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