Olivetti DF-790 Service Manual page 81

Problem
(9)
DF shift release
motor does not
operate.
(10)
DF shift motor 1,2
does not operate.
(11)
DF staple motor
does not operate.
(12)
DF slide motor
does not operate.
(13)
DF feedshift sole-
noid 1,2,3 does not
operate.
Y113480-7
Causes
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.
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.
Check procedures/corrective measures
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
DF shift release motor and DF main PWB (YC14)
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 DF shift release motor.
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.
DF shift motor 1,2 and DF main PWB (YC14)
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 DF shift motor 1,2.
Replace the bridge 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.
DF staple motor and DF main PWB (YC17)
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 DF staple unit.(see page 1-5-4)
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.
DF slide motor and DF main PWB (YC12)
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 DF slide motor
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.
DF feedshift solenoid 1,2,3 and DF main PWB (YC18)
Replace the DF feedshift solenoid 1,2,3.
Replace the DF main PWB and check for correct operation
(see page 1-5-2).
1-4-28
3NB/3ND/3N0/3NK
Sevice Manual