Kyocera TASKALFA 300I, Service Manual

Page: 187 / 408

2K5
1-4-43
(9)
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 scanner PWB. Run maintenance item U061 and check if YC5-1 and YC5-6 on
the scanner PWB goes low. If not, replace the scanner PWB.
If YC16-1 and YC16-6 on the scanner PWB is always low, replace
the scanner PWB.
3. Defective inverter PWB. Run maintenance item U061 and check if the exposure lamp turns
on with CN1-1 and CN1-6 on the inverter PWB go low. If not,
replace the inverter PWB.
If the exposure lamp does not turn off with CN1-1 and CN1-6 on
the inverter PWB high, replace the inverter PWB.
4. Defective exposure lamp. Replace the exposure lamp even if checking or correcting other
measures.
(10)
Main charging is not
performed. 1. Broken main charger
wire.
Replace the main charger unit (see page 1-5-33).
2. Leaking main charger
housing.
Clean the main charger wire and grid.
3. The connector terminals
of the 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.
4. Defective engine PWB. Check if YC12-5 on the engine PWB goes low when maintenance
item U100 is run. If not, replace the engine PWB.
5. Defective high voltage
PWB.
Check if main charging takes place when CN1-8 on the high volt-
age PWB goes low while maintenance item U100 is run. If not,
replace the high voltage PWB.
(11)
No developing bias is
output. 1. The connector terminals
of the 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.
2. Defective engine PWB. Check if YC12-2 on the engine PWB goes low when maintenance
item U101 is run. If not, replace the engine PWB.
3. Defective high voltage
PWB.
Check if developing bias is output when CN1-11 on the high volt-
age PWB goes low while maintenance item U101 is run. If not,
replace the high voltage PWB.
(12)
Transfer charging is
not performed. 1. The connector terminals
of the 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.
2. Defective engine PWB. Check if YC12-11 on the engine PWB goes low when mainte-
nance item U101 is run. If not, replace the engine PWB.
3. Defective high voltage
PWB.
Check if transfer charging takes place when CN1-2 on the high
voltage PWB goes low while maintenance item U101 is run. If not,
replace the high voltage PWB.
Problem Causes Check procedures/corrective measures