Kyocera TASKalfa 420i, Service Manual

Page: 203 / 508

2KR/2KS
1-4-45
C8910 Punch backup problem (optional of
3000-sheet document finisher)
Read and write data does not match 3
times in succession.
Poor contact in the
connector termi-
nals. Check the connection of connector on the
punch PWB and the connector YC4 on the
finisher main PWB, and the continuity
across the connector terminals. Repair or
replace if necessary.
Defective punch
PWB. Replace the punch PWB and check for cor-
rect operation.
C8920 Mailbox backup problem (optional
mailbox of 3000-sheet document fin-
isher)
Read and write data does not match.
Poor contact in the
connector termi-
nals. Check the connection of connector on the
mailbox main PWB and the connector YC7
on the finisher main PWB, and the continuity
across the connector terminals. Repair or
replace if necessary.
Defective mailbox
main PWB. Replace the mailbox main PWB and check
for correct operation.
C8930 Center-folding backup problem
(optional center-folding unit of 3000-
sheet document finisher)
Read and write data does not match 3
times in succession.
Poor contact in the
connector termi-
nals. Check the connection of connector on the
centerfold main PWB and the connector
YC5 on the finisher main PWB, and the con-
tinuity across the connector terminals.
Repair or replace if necessary.
EEPROM installed
incorrectly. Install EEPROM correctly.
Defective center-
fold main PWB. Replace the centerfold main PWB and
check for correct operation.
C9000 DP communication problem
(optional DP)
A communication error is detected.
Poor contact in the
connector termi-
nals. Check the connection of connector YC6 on
the ISM PWB and the connector of the DP,
and the continuity across the connector ter-
minals. Repair or replace if necessary.
Defective PWB. Replace the DP driver PWB or ISM PWB
and check for correct operation.
C9040 DP lift motor going up error
(optional DP)
The tray upper limit switch does not turn
on within 2 s of DP lift motor turning on.
Loose connection
of the DP lift motor
connector. Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
remedy or replace the cable.
Malfunction of the
DP lift motor. Replace the DP lift motor and check for cor-
rect operation.
Loose connection
of the tray upper
limit switch con-
nector. Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
remedy or replace the cable.
Malfunction of the
tray upper limit
switch. Replace the tray upper limit switch and
check for correct operation.
Defective DP driver
PWB. Replace the DP driver PWB and check for
correct operation.
Code Contents
Remarks
Causes Check procedures/corrective measures