Electric Problems - Olivetti DP-670 Service Manual

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Electric problems

Troubleshooting to each failure must be in the order of the numbered symptoms.
Problem
(1)
The original feed
motor, original con-
veying motor or origi-
nal switchback motor
does not operate.
(2)
The DP cooling fan
motor does not oper-
ate.
(3)
The switchback feed-
shift solenoid or
switchback pressure
solenoid does not
operate.
(4)
A message indicating
cover open is dis-
played when the doc-
ument processor top
cover is closed cor-
rectly.
(5)
An original jams
when the main power
switch is turned on.
Y108671-9
Causes
1. Poor contact in the con-
nector terminals.
2. Defective drive transmis-
sion system.
3. Defective motor.
4. Defective DP main PWB. Run maintenance item U243 and check if the motor operates. If
1. Poor contact in the con-
nector terminals.
2. Broken motor coil.
1. Defective solenoid coil.
2. Poor contact in the con-
nector terminals.
3. Defective DP main PWB. Run maintenance item U243 and check if the solenoid operates. If
1. Poor contact in the con-
nector terminals of DP
interlock switch.
2. Defective DP interlock
switch.
1. A piece of paper torn
from an original is caught
around the switch.
2. Defective DP timing
switch or original switch-
back switch.
Check procedures/corrective measures
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 U243 and check if the motor operates. If
not, replace the motor.
not, replace the DP main 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 solenoid.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
not, replace the DP main 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 contacts of the switch. If none
when the switch is on, replace DP interlock switch.
Remove any found.
Run maintenance item U244 and turn the switch on and off manu-
ally. Replace the switch if indication of the corresponding switch
on the touch panel is not displayed in reverse.
Service Manual
3K5
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