Kyocera TASKalfa 2551ci, Service Manual

Page: 374 / 756

2NP-3
1-4-67
8430 Punch unit communication
error
Communication with the
punch unit is not possible.
Punch PWB
1. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
Punch PWB (YC1) and DF main PWB
(YC8)
2. If the wiring is disconnected, shorted or
grounded, replace the wiring.
3. Replace the Punch PWB.
DF main PWB Replace the DF main PWB
8800 Document finisher main
program error
Document finisher main pro-
gram error at power up.
DF main PWB
1. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
DF main PWB (YC7) and Engine PWB
(YC18)
2. If the wiring is disconnected, shorted or
grounded, replace the wiring.
3. Replace the DF main PWB
Engine PWB
1. Check the engine software and upgrade
to the latest, if necessary.
2. Replace the engine PWB (see page 1-5-
42).
8900 Document finisher backup
error
Read and write data does not
match 3 times in succession.
DF main PWB
1. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
DF main PWB (YC7) and Engine PWB
(YC33)
2. If the wiring is disconnected, shorted or
grounded, replace the wiring.
3. Replace the DF main PWB
8990 Backup memory data prob-
lem (document finisher)
When one of the existence of
a finisher or a bridge is not
detected.
Defective connec-
tor cable or poor
contact in the con-
nector. Check the connection of connector on the
finisher main PWB and the connector of the
machine, and the continuity across the con-
nector terminals. Repair or replace if neces-
sary.
Defective power
cord Confirm that the power cable is firmly
connected and, if necessary, connect the
plug all the way in.
Also check for continuity within the power
cable. If none, replace the powercable.
EEPROM installed
incorrectly. Install EEPROM correctly.
Defective finisher
main PWB. Replace the finisher main PWB and check
for correct operation.
Code Contents Causes
Check procedures/
corrective measures