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1-4-2
Self-diagnosis
(1) Self-diagnostic function
This unit is equipped with a self-diagnostic function. When a problem is detected, copying is disabled and the problem dis-
played as 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 codes
Code
C0420
Side feeder communication error
A communication error from side feeder
is detected 10 times in succession.
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
The paper lifter is situated between the
tray lower limit detection sensor and
paper level detection sensor 2; Paper
level detection sensor 2 does not turn off
within 38 s since the paper lifter has
started to ascend.
The paper lifter is situated between
paper level detection sensors 2 and 1;
Paper level detection sensor 1 does not
turn off within 30 s since the paper lifter
has started to ascend.
The paper lifter is situated between
paper level detection sensor 1 and the
tray upper limit detection sensor; The
tray upper limit sensor does not turn off
within 28 s since the paper lifter has
started to ascend.
During paper feeding, the tray upper limit
sensor does not turn off within 200 ms
since the paper lifter has started to
ascend.
A lock signal is detected.
Contents
Causes
Check procedures/corrective measures
Poor contact in the
Check the connection of connector YC15 on
connector termi-
the machine's engine PWB and the connec-
nals.
tor YC6 on the side feeder main PWB, and
the continuity across the connector termi-
nals. Repair or replace if necessary.
Defective
Replace the machine's engine PWB and
machine's engine
check for correct operation.
PWB.
Defective
Replace the machine's main PWB and
machine's main
check for correct operation.
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-
side feeder lift
nuity within the connector cable. If none,
motor connector
repair or replace the cable.
terminals.
Broken gears, belt
Replace gears, belt or wire of side feeder lift
or wire of side
drive unit.
feeder lift drive
unit.
Defective side
Check for continuity across the coil. If none,
feeder lift motor.
replace side feeder lift motor.
Poor contact of
Reinsert the connector. Also check for conti-
paper level detec-
nuity within the connector cable. If none,
tion sensor 1, 2 or
repair or replace the cable.
tray upper limit
detection sensor
connector termi-
nals.
Defective paper
Run maintenance item U233 and turn sen-
level detection sen-
sor on and off manually. Replace sensor if
sor 1, 2 or tray
indication of the corresponding sensor on
upper limit detec-
the touch panel is not displayed in reverse.
tion sensor.
Defective side
Replace the side feeder main PWB.
feeder main PWB.
Remarks
3M0
1-4-3
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