Olivetti DF-790 Service Manual page 83

Problem
(20)
CF paper entry
motor does not
operate.
(21)
CF staple motor
does not operate.
(22)
CF feedshift sole-
noid does not oper-
ate.
(23)
Mailbox drive
motor does not
operate.
(24)
Punch motor 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 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.
Check procedures/corrective measures
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
CF paper entry motor 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 paper entry 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 staple motor and CF main PWB (YC13)
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 staple 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 feedshift solenoid and DF main PWB (YC17)
Replace the CF feedshift solenoid.
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.
Mailbox drive motor and CF main PWB (YC5)
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 Mailbox drive motor.
Replace the Mailbox main PWB and check for correct oper-
ation.
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
Punch motor and Punch PWB (YC4)
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 Punch motor.
Replace the Punch PWB and check for correct operation.
1-4-30
3NB/3ND/3N0/3NK
Sevice Manual