Kyocera KM-2540 Service Manual page 154

2JB/2JC
Problem
(6)
The feedshift sole-
noid does not oper-
ate.
(7)
The exposure lamp
does not turn on or
off.
(8)
Main charging is not
performed.
(9)
No developing bias is
output.
(10)
Transfer charging is
not performed.
1-4-42
Causes
1. Broken solenoid coil.
2. Poor contact in the con-
nector terminals.
3. Defective engine PWB.
1. Poor contact in the con-
nector terminals.
2. Defective engine PWB.
3. Defective scanner
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
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 U033 and check if the solenoid operates. If
not, replace the engine PWB.
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 YC16-1 and YC16-6 on
the engine PWB goes low. If not, replace the engine PWB.
If YC16-1 and YC16-6 on the engine PWB is always low, replace
the engine PWB.
Run maintenance item U061 and check if the exposure lamp turns
on with YC1-1 and YC1-6 on the scanner inverter PWB go low. If
not, replace the scanner inverter PWB.
If the exposure lamp does not turn off with YC1-1 and YC1-6 on
the scanner inverter PWB high, replace the scanner inverter
PWB.
measures.
(See page 1-4-35.)
(See page 1-4-35.)
(See page 1-4-35.)