Table of Contents
Advertisement
Problem
(9)
The exposure lamp
does not turn on or
off.
(10)
Main charging is not
performed.
(11)
No developing bias is
output.
(12)
Transfer charging is
not performed.
Y112040-6
Causes
1. Poor contact in the con-
nector terminals.
2. Defective scanner PWB.
3. Defective inverter PWB.
4. Defective exposure lamp. Replace the exposure lamp even if checking or correcting other
1. Broken main charger
wire.
2. Leaking main charger
housing.
3. The connector terminals
of the high voltage PWB
make poor contact.
4. Defective engine PWB.
5. Defective high voltage
PWB.
1. The connector terminals
of the high voltage PWB
make poor contact.
2. Defective engine PWB.
3. Defective high voltage
PWB.
1. The connector terminals
of the high voltage PWB
make poor contact.
2. Defective engine PWB.
3. Defective high voltage
PWB.
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 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.
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.
measures.
Replace the main charger unit (see page 1-5-33).
Clean the main charger wire and grid.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Check if YC12-5 on the engine PWB goes low when maintenance
item U100 is run. If not, replace the engine 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.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Check if YC12-2 on the engine PWB goes low when maintenance
item U101 is run. If not, replace the engine 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.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Check if YC12-11 on the engine PWB goes low when mainte-
nance item U101 is run. If not, replace the engine 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.
Service Manual
2K5
1-4-43
Advertisement
Table of Contents
