Electric Problems - Olivetti DF-670 Service Manual

1-4-3

Electric problems

Troubleshooting to each failure must be in the order of the numbered symptoms.
Problem
(1)
The paper convey-
ing motor does not
operate.
(2)
The feedshift sole-
noid does not oper-
ate.
(3)
The pickup solenoid
does not operate.
Y108690-3
Causes
1. Poor contact in the con-
nector terminals.
2. Broken motor coil.
3. Defective drive transmis-
sion system.
1. Broken solenoid coil.
2. Poor contact in the con-
nector terminals.
3. Defective engine PWB.
1. Broken solenoid coil.
2. Poor contact in the con-
nector terminals.
Check procedures/corrective measures
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Check for continuity across the coil. If none, replace the motor.
Check if the rollers and gears rotate smoothly. If not, grease the
bushings and gears. Check for broken gears and replace if any.
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.
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.
Service Manual
3LB
1-4-5