Kyocera KM-C2525E Service Manual page 228

2JL/2JJ/2JG/2JD
Problem
(10)
Defective developing
bias output.
(11)
Defective transfer
bias output.
(12)
The original size is
not detected cor-
rectly.
(13)
The touch panel keys
do not work.
(14)
The message
requesting paper to
be loaded is shown
when paper is
present on the cas-
sette or MP tray.
1-4-58
Causes
1. The connector terminals
of main high voltage
PWB make poor contact.
2. Defective engine PWB.
3. Defective main high volt-
age PWB.
1. The connector terminals
of transfer high voltage
PWB 1 make poor con-
tact.
2. Defective engine PWB.
3. Defective transfer high
voltage PWB 1.
4. Defective transfer belt
unit.
1. Original is not placed cor-
rectly.
2. Poor contact in the origi-
nal detection switch or
original size detection
sensor connector termi-
nals.
3. Defective original detec-
tion switch.
4. Defective original size
detection sensor.
1. Poor contact in the touch
panel connector termi-
nals.
2. Defective touch panel or
left operation PWB.
1. Poor contact in the con-
nector terminals of paper
detection switch 1/2 or
MP paper set switch.
2. Defective paper detection
switch 1/2 or MP paper
set switch.
3. Defective paper stop-
pers.
Check procedures/corrective measures
(See page 1-4-50.)
(See page 1-4-50.)
Check the original and correct if necessary.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
If the level of YC2-5 on the engine PWB does not go low when the
original detection switch is turned on and off, replace the original
detection switch.
Check if sensor operates correctly. If not, replace it.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
If any keys do not work after running the maintenance item U201
to initialize the touch panel, replace the touch panel or operation
unit PWB.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
If the level of following terminal on PWB does not change when
the switch is turned on and off, replace the switch.
Paper detection switch 1: YC9-7 on the feed PWB
Paper detection switch 2: YC9-1 on the feed PWB
MP paper set detection switch: YC24-A11 on the engine PWB
Remove the MP tray unit and check if the paper stoppers are dar-
maged. Replace if necessary.