Kyocera 300ci Service Manual page 291

Problem
(15) 1. Poor contact in the con-
The exposure lamp
does not turn on or
2. Defective inverter PWB.
off.
3. Defective ISC PWB.
4. Defective ISM PWB.
(16) 1. Defective drum unit.
Main charging is not
2. The connector terminals
performed.
3. Defective engine PWB.
4. Defective main high volt-
(17) 1. The connector terminals
Defective developing
bias output.
2. The connector terminals
3. Defective engine PWB.
4. Defective high voltage
5. Defective main high volt-
(18) 1. The connector terminals
Defective transfer
bias output.
2. Defective engine PWB.
3. Defective transfer high
4. Defective transfer belt
(19) 1. Original is not placed cor-
The original size is
not detected cor-
2. Poor contact in the origi-
rectly.
3. Defective original detec-
4. Defective original size
Causes
nector terminals.
of the main high voltage
PWB make poor contact.
age PWB.
of the main high voltage
PWB make poor contact.
of the high voltage con-
trol PWB make poor con-
tact.
control PWB.
age PWB.
of the transfer high volt-
age PWB 1 make poor
contact.
voltage PWB 1.
unit.
rectly.
nal detection switch or
original size sensor con-
nector terminals.
tion switch.
sensor.
Check procedures/corrective measures
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Run maintenance item U061 and check if the exposure lamp turns
on with the inverter PWB go low. If not, replace the inverter PWB.
Run maintenance item U061 and check if YC3-23 on the ISC
PWB goes high. If not, replace the ISC PWB.
Run maintenance item U061 and check if YC5-4 on the ISM PWB
goes low. If not, replace the ISM PWB.
Replace the drum unit (see page 1-5-35).
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Replace the engine PWB.
Replace the main high voltage PWB.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Replace the engine PWB.
Replace the high voltage control PWB.
Replace the main high voltage PWB.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Replace the engine PWB.
Replace the transfer high voltage PWB 1.
Replace the transfer belt unit (see page 1-5-37).
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 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.
Check if sensor operates correctly. If not, replace it.
2JZ/2JX/2JV/2H7-1
1-4-73