Kyocera TASKalfa 220 Service Manual page 137

Problem
(5) 1. Broken solenoid coil.
The MP solenoid
2. Poor contact in the con-
does not operate.
3. Defective cassette PWB.
4. Defective main/engine
(6) 1. Poor contact in the con-
The cleaning lamp
does not turn on.
2. Defective cleaning lamp.
3. Defective main/engine
(7) 1. Poor contact in the con-
The exposure lamp
does not turn on or
2. Defective exposure lamp. Run maintenance item U061 and check if the exposure lamp turns
off.
3. Defective inverter PWB.
4. Defective main/engine
(8) 1. Broken main charger
Main charging is not
performed.
2. Leaking main charger
3. The connector terminals
4. Defective high voltage
5. Defective main/engine
(9) 1. The connector terminals
No developing bias is
output.
2. Defective high voltage
3. Defective main/engine
Causes
nector terminals.
PWB.
nector terminals.
PWB.
nector terminals.
PWB.
wire.
housing.
of the high voltage PWB
make poor contact.
PWB.
PWB.
of the high voltage PWB
make poor contact.
PWB.
PWB.
Check procedures/corrective measures
Check for continuity across the coil. If none, replace the solenoid.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Run maintenance item U032 and check if following terminals on
the cassette PWB goes low. If not, replace the cassette PWB.
MP solenoid: YC8-2 on the cassette PWB
Run maintenance item U032 and check if following terminals on
the main/engine PWB goes low. If not, replace the main/engine
PWB.
MP solenoid: YC7-16 on the main/engine PWB
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Check for continuity. If none, replace the cleaning lamp.
If YC3-B6 and YC3-B7 on the main/engine PWB is always low,
replace the main/engine PWB.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
on with YC2-1 and YC2-4 on the inverter PCB go low. If not,
replace the exposure lamp.
Run maintenance item U061 and check if the exposure lamp turns
on with YC1-3 on the inverter PWB go low. If not, replace the
inverter PWB.
If the exposure lamp does not turn off with YC1-3 on the inverter
PWB high, replace the inverter PWB.
Run maintenance item U061 and check if YC16-4 on the main/
engine PWB goes low. If not, replace the main/engine PWB.
If YC16-4 on the main/engine PWB is always low, replace the
main/engine PWB.
Replace the main charger unit (see page 1-5-36).
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 main charging takes place when CN1-7 on the high volt-
age PWB goes low while maintenance item U100 is run. If not,
replace the high voltage PWB.
Check if YC8-7 on the main/engine PWB goes low when mainte-
nance item U100 is run. If not, replace the main/engine PWB.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Check if developing bias is output when CN1-9 on the high volt-
age PWB goes low while maintenance item U101 is run. If not,
replace the high voltage PWB.
Check if YC8-9 on the main/engine PWB goes low when mainte-
nance item U101 is run. If not, replace the main/engine PWB.
2KL/2KK
1-4-29