Olivetti DP-700, Service Manual

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3JX
1-4-6
1-4-3 Electric problems
Troubleshooting to each failure must be in the order of the numbered symptoms.
1-4-4 Mechanical problems
Problem Causes Check procedures/corrective measures
(1)
The original feed
motor, original regis-
tration motor, origi-
nal conveying motor
or DP lift motor does
not operate. 1. Poor contact in the con-
nector terminals.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
2. Defective drive transmis-
sion system.
Check if the rollers and gears rotate smoothly. If not, grease the
bushings and gears. Check for broken gears and replace if any.
3. Defective motor. Run maintenance item U243 and check if the motor operates. If
not, replace the motor.
4. Defective DP drive relay
PWB.
Run maintenance item U243 and check if the motor operates. If
not, replace the DP drive relay PWB.
(2)
A message indicating
cover open is dis-
played when the DP
is closed correctly. 1. Poor contact in the con-
nector terminals.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
2. Defective DP safety
switch 1.
Check for continuity across the contacts of the switch. If none
when the switch is on, replace DP safety switch 1.
(3)
An original jams
when the main power
switch is turned on. 1. A piece of paper torn
from copy paper is
caught around original
feed switch, original reg-
istration switch or DP tim-
ing switch 1/2.
Remove any found.
2. Defective original feed
switch, original registra-
tion switch or DP timing
switch 1/2.
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.
Problem Causes/check procedures Corrective measures
(1)
No primary original feed. The surfaces of the DP original feed belt, DP
forwarding pulley or DP separation pulley are
dirty with paper powder. Check and clean them with isopropyl alcohol
if they are dirty.
Check if the DP original feed belt, DP forward-
ing pulley or DP separation pulley is
deformed. If so, replace (see page 1-5-3).
(2)
No secondary original
feed. The registration pulley and the registration
roller do not contact each other correctly. Check and clean them with isopropyl alcohol
if they are dirty.
(3)
Originals jam. Originals outside the specifications are used. Use only originals conforming to the specifi-
cations.
The surfaces of the DP original feed belt, DP
forwarding pulley or DP separation pulley are
dirty with paper powder. Check and clean them with isopropyl alcohol
if they are dirty.
The eject pulley and the eject roller do not
contact each other correctly. Check visually and remedy if necessary.
Service Manual Y106871-5