Kyocera TASKalfa 181, Service Manual

Page: 147 / 355

2KJ/2KH
1-4-33
(6)
The MP solenoid
does not operate. 1. Broken solenoid coil. Check for continuity across the coil. If none, replace the solenoid.
2. 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.
3. Defective cassette PWB. 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
4. Defective engine PWB. Run maintenance item U032 and check if following terminals on
the engine PWB goes low. If not, replace the engine PWB.
MP solenoid: YC7-16 on the engine PWB
(7)
The cleaning lamp
does not turn on. 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 cleaning lamp. Check for continuity. If none, replace the cleaning lamp.
3. Defective engine PWB. If YC3-B6 and YC3-B7 on the engine PWB is always low, replace
the engine PWB.
(8)
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 exposure lamp. Run maintenance item U061 and check if the exposure lamp turns
on with YC2-1 and YC2-4 on the inverter PCB go low. If not,
replace the exposure lamp.
3. Defective inverter PWB. 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.
4. Defective engine PWB. Run maintenance item U061 and check if YC16-4 on the engine
PWB goes low. If not, replace the engine PWB.
If YC16-4 on the engine PWB is always low, replace the engine
PWB.
(9)
Main charging is not
performed. 1. Broken main charger
wire.
Replace the main charger unit (see page 1-5-43).
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 high voltage
PWB.
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.
5. Defective engine PWB. Check if YC8-7 on the engine PWB goes low when maintenance
item U100 is run. If not, replace the engine PWB.
(10)
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 high voltage
PWB.
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.
3. Defective engine PWB. Check if YC8-9 on the engine PWB goes low when maintenance
item U101 is run. If not, replace the engine PWB.
Problem Causes Check procedures/corrective measures