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