Olivetti DF-790 Service Manual page 84

Problem
(25)
Punch slide motor
does not operate.
(26)
A paper jam is indi-
cated when the
main power switch
is turned on.
(27)
[Out of staples.
Add staples.] is
displayed when the
main power switch
is turned on.
Service Manual
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. 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
2. Defective sensor.
1. Defective connector
cable or poor con-
tact in the connector.
2. Defective stapler
empty sensor.
3. Defective PWB.
Check procedures/corrective measures
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
Punch slide motor and Punch PWB (YC3)
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 slide motor.
Replace the Punch PWB and check for correct operation.
Check visually and remove it, if any.
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).
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
Stapler empty sensor and DF main PWB (YC12)
Replace the staple unit.
(see page 1-5-4)
Replace the DF main PWB and check for correct operation.
(see page 1-5-2)
1-4-31
3NB/3ND/3N0/3NK
Y113480-7