Electric Problems - Olivetti d-copia 1800 Service Manual

2KL/2KK
1-4-4

Electric problems

Troubleshooting to each failure must be in the order of the numbered symptoms.
Problem
(1)
The machine does
not operate when the
main power switch is
turned on.
(2)
The eject motor does
not operate.
(3)
The scanner motor or
cooling fan motor 1, 2
does not operate.
(4)
The paper feed
clutch, registration
clutch or duplex feed
clutch does not oper-
ate.
1-4-28
Causes
1. The power cord is not
plugged in properly.
2. No electricity at the
power outlet.
3. Broken power cord.
4. Defective main power
switch.
5. Defective power source
PWB.
1. Poor contact in the con-
nector terminals.
2. Defective drive transmis-
sion system.
3. Defective eject motor.
4. Defective main/engine
PWB.
1. Poor contact in the con-
nector terminals.
2. Broken motor coil.
1. Broken clutch coil.
2. Poor contact in the con-
nector terminals.
3. Defective cassette PWB.
4. Defective main/engine
PWB.
Check procedures/corrective measures
Check the contact between the power plug and the outlet.
Measure the input voltage.
Check for continuity. If none, replace the cord.
Check for continuity across the contacts. If none, replace the main
power switch.
With AC present, check for 24 V DC at YC1-2, YC1-3 and YC1-4
on the power source PWB. If none, replace the power source
PWB.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Check if the rollers and gears rotate smoothly. If not, grease the
bushings and gears. Check for broken gears and replace if any.
Run maintenance item U030 and check if the eject motor oper-
ates. If not, replace the eject motor.
Run maintenance item U030 and check if the eject motor oper-
ates. If not, replace the main/engine PWB.
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 for continuity across the coil. If none, replace the clutch.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Run maintenance item U032 and check if following terminals on
the cassette PWB goes low. If not, replace thecassette PWB.
Paper feed clutch: YC7-2 on the cassette PWB
Registration clutch: YC6-2 on the cassette PWB
Duplex feed clutch: YC5-6 on the cassette PWB
Run maintenance item U032 and check if following terminals on
the main/engine PWB goes low. If not, replace the main/engine
PWB.
Paper feed clutch: YC7-17 on the main/engine PWB
Registration clutch: YC7-18 on the main/engine PWB
Duplex feed clutch: YC7-12 on the main/engine PWB
Service Manual Y110980-1