Olivetti DF-790 Service Manual page 82

Problem
(14)
DF eject clutch
does not operate.
(15)
Bridge conveying
motor1,2 does not
operate.
(16)
Bridge solenoid
does not operate.
(17)
CF main motor
does not operate.
(18)
CF adjustment
motor 1,2 does not
operate.
(19)
CF side registra-
tion motor 1,2 does
not operate.
Service Manual
Causes
1. Defective connector
cable or poor con-
tact in the connector.
2. Defective solenoid.
3. Defective PWB.
1. Defective connector
cable or poor con-
tact in the connector.
2. Defective drive trans-
mission system.
3. Defective motor.
4. Defective PWB.
1. Defective connector
cable or poor con-
tact in the connector.
2. Defective solenoid.
3. Defective PWB.
1. Defective connector
cable or poor con-
tact in the connector.
2. Defective drive trans-
mission system.
3. Defective motor.
4. Defective PWB.
1. Defective connector
cable or poor con-
tact in the connector.
2. Defective drive trans-
mission system.
3. Defective motor.
4. Defective PWB.
1. Defective connector
cable or poor con-
tact in the connector.
2. Defective drive trans-
mission system.
3. Defective motor.
4. Defective PWB.
Check procedures/corrective measures
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
DF eject clutch and DF main PWB (YC14)
Replace the DF eject clutch.
Replace the DF main PWB and check for correct operation
(see page 1-5-2).
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
Bridge conveying motor1,2 and bridge PWB (YC7)
Check if the rollers and gears rotate smoothly. If not,
grease the bushes and gears. Check for broken gears and
replace if any.
Replace the bridge conveying motor1,2.
Replace the bridge PWB and check for correct operation.
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
Bridge solenoid and engine PWB (YC20)
Replace the bridge solenoid.
Replace the engine PWB and check for correct operation.
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
CF main motor and CF main PWB (YC16)
Check if the rollers and gears rotate smoothly. If not,
grease the bushes and gears. Check for broken gears and
replace if any.
Replace the CF main motor.
Replace the CF main PWB and check for correct operation.
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
CF adjustment motor 1,2 and CF main PWB (YC10)
Check if the rollers and gears rotate smoothly. If not,
grease the bushes and gears. Check for broken gears and
replace if any.
Replace the CF adjustment motor 1,2.
Replace the CF main PWB and check for correct operation.
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
CF side registration motor 1,2 and CF main PWB (YC10)
Check if the rollers and gears rotate smoothly. If not,
grease the bushes and gears. Check for broken gears and
replace if any.
Replace the CF side registration motor 1,2.
Replace the CF main PWB and check for correct operation.
1-4-29
3NB/3ND/3N0/3NK
Y113480-7