Kyocera TASKalfa 400ci - Page 272

2JZ/2JX/2JV/2H7-1
1-4-72
(15)
The exposure lamp
does not turn on or
off.
1. Poor contact in the con-
nector terminals.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
2. Defective inverter PWB. Run maintenance item U061 and check if the exposure lamp turns
on with the inverter PWB go low. If not, replace the inverter PWB.
3. Defective ISC PWB. Run maintenance item U061 and check if YC3-23 on the ISC
PWB goes high. If not, replace the ISC PWB.
4. Defective ISM PWB. Run maintenance item U061 and check if YC5-4 on the ISM PWB
goes low. If not, replace the ISM PWB.
(16)
Main charging is not
performed.
1. Defective drum unit. Replace the drum unit (see page 1-5-35).
2. The connector terminals
of the main high voltage
PWB make poor contact.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
3. Defective engine PWB. Replace the engine PWB.
4. Defective main high volt-
age PWB.
Replace the main high voltage PWB.
(17)
Defective developing
bias output.
The connector terminals of
the main high voltage PWB
make poor contact.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
The connector terminals of
the high voltage control
PWB make poor contact.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Defective engine PWB. Replace the engine PWB.
Defective high voltage con-
trol PWB.
Replace the high voltage control PWB.
Defective main high volt-
age PWB.
Replace the main high voltage PWB.
(18)
Defective transfer
bias output.
The connector terminals of
the transfer high voltage
PWB 1 make poor contact.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Defective engine PWB. Replace the engine PWB.
Defective transfer high volt-
age PWB 1.
Replace the transfer high voltage PWB 1.
Defective transfer belt unit. Replace the transfer belt unit (see page 1-5-37).
(19)
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 sensor con-
nector terminals.
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 YC4-2 on the ISM PWB does not go low when the
original detection switch is turned on and off, replace the original
detection switch.
4. Defective original size
sensor.
Check if sensor operates correctly. If not, replace it.
Problem Causes Check procedures/corrective measures