Kyocera 300ci Service Manual page 280

2JZ/2JX/2JV/2H7
(1) No image appears (entirely white).
Copy example
Defective
transfer
bias output.
No LSU
laser is out-
put.
Defective
developing
bias output.
(2) No image appears (entirely black).
Copy example
No main
charging.
Exposure
lamp fails to
light.
The laser is
activated
simulta-
neously for
all colors.
1-4-62
Causes
The connector terminals
of the transfer high volt-
age PWB 1 make poor
contact.
Defective engine PWB.
Defective transfer high
voltage PWB 1.
Defective transfer belt
unit.
Defective laser scanner
unit.
Defective engine PWB.
The connector terminals
of the main high voltage
PWB make poor contact.
The connector terminals
of the high voltage con-
trol PWB make poor con-
tact.
Defective engine PWB.
Defective high voltage
control PWB.
Defective main high volt-
age PWB.
Causes
Defective drum unit.
The connector terminals
of the main high voltage
PWB make poor contact.
Defective engine PWB.
Defective main high volt-
age PWB.
Poor contact in the expo-
sure lamp connector ter-
minals.
Defective inverter PWB.
Defective ISM PWB.
Defective laser scanner
unit.
Check procedures/corrective measures
Reinsert the connector. Also check for continuity within the
connector 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).
Replace the laser scanner unit (see page 1-5-21).
Replace the engine PWB.
Reinsert the connector. Also check for continuity within the
connector cable. If none, remedy or replace the cable.
Reinsert the connector. Also check for continuity within the
connector cable. If none, remedy or replace the cable.
Replace the engine PWB.
Replace the high voltage control PWB.
Replace the main high voltage PWB.
Check procedures/corrective measures
Replace the drum unit (see page 1-5-35).
Reinsert the connector. Also check for continuity within the
connector 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
connector cable. If none, remedy or replace the cable.
Check if the exposure lamp lights when the terminal on the
inverter PWB goes low while maintenance item U061 is
run. If not, replace the inverter PWB.
Run maintenance item U061 and check if YC5-4 on the ISM
PWB goes low. If not, replace the ISM PWB.
Replace the laser scanner unit (see page 1-5-21).