Olivetti DF-790, Service Manual

Page: 84 / 155

3NB/3ND/3N0/3NK
1-4-31
(25)
Punch slide motor
does not operate. 1. Defective connector
cable or poor con-
tact in the connector.
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
Punch slide motor and Punch PWB (YC3)
2. Defective drive trans-
mission system.
Check if the rollers and gears rotate smoothly. If not,
grease the bushes and gears. Check for broken gears and
replace if any.
3. Defective motor. Replace the Punch slide motor.
4. Defective PWB. Replace the Punch PWB and check for correct operation.
(26)
A paper jam is indi-
cated when the
main power switch
is turned on. 1. A piece of paper torn
from paper is caught
around sensor.
Bridge to DF
Bridge conveying
sensor1,2 or bridge
eject sensor,DF
paper entrance
sensor, DF middle
sensor, DF eject
paper sensor, DF
sub eject sensor, DF
drum sensor
Center-folding unit
CF paper conveying
sensor,CF paper
entry sensor CF
eject sensor
Mail box
Tray overflow switch
1 to 7,Tray eject sen-
sor
Check visually and remove it, if any.
2. Defective sensor. Replace the bridge conveying sensor1,2 or bridge eject
sensor,DF paper entrance sensor, DF middle sensor, DF
eject paper sensor, DF sub eject sensor, DF drum sen-
sor(Bridge,DF),CF paper conveying sensor,CF paper entry
sensor CF eject sensor(Center-folding unit),Tray overflow
switch 1 to 7 or Tray eject sensor(Mail box).
(27)
[Out of staples.
Add staples.] is
displayed when the
main power switch
is turned on. 1. Defective connector
cable or poor con-
tact in the connector.
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
Stapler empty sensor and DF main PWB (YC12)
2. Defective stapler
empty sensor.
Replace the staple unit.
(see page 1-5-4)
3. Defective PWB. Replace the DF main PWB and check for correct operation.
(see page 1-5-2)
Problem Causes Check procedures/corrective measures
Service Manual Y113480-7