Olivetti d-Copia 2500MF Service Manual page 163

(1) No image appears (entirely white).
Copy example
No trans-
fer charg-
ing.
No LSU
laser is
output.
No devel-
oping bias
output.
(2) No image appears (entirely black).
Copy example
No main
charging.
Exposure
lamp fails
to light.
Y108620-5
Causes
The connector terminals
of the high voltage PWB
make poor contact.
Defective engine PWB.
Defective high voltage
PWB.
Defective laser scanner
unit.
Defective main PWB.
The connector terminals
of the high voltage PWB
make poor contact.
Defective engine PWB.
Defective high voltage
PWB.
Causes
Broken main charger
wire.
Leaking main charger
housing.
The connector terminals
of the high voltage PWB
make poor contact.
Defective engine PWB.
Defective high voltage
PWB.
Poor contact in the expo-
sure lamp connector ter-
minals.
Defective scanner
inverter PWB.
Defective engine PWB.
Service Manual
Check procedures/corrective measures
Reinsert the connector. Also check for continuity within the
connector cable. If none, remedy or replace the cable.
Check if YC12-11 on the engine PWB goes low when main-
tenance item U101 is run. If not, replace the engine PWB.
Check if transfer charging takes place when CN1-2 on the
high voltage PWB goes low while maintenance item U101 is
run. If not, replace the high voltage PWB.
Replace the laser scanner unit (see page 1-5-29).
Check if YC21-3 on the main PWB goes low when mainte-
nance item U100 is run. If not, replace the main PWB.
Reinsert the connector. Also check for continuity within the
connector cable. If none, remedy or replace the cable.
Check if YC12-2 on the engine PWB goes low when mainte-
nance item U101 is run. If not, replace the engine PWB.
Check if developing bias is output when CN1-11 on the high
voltage PWB goes low while maintenance item U101 is run.
If not, replace the high voltage PWB.
Check procedures/corrective measures
Replace the main charger unit (see page 1-5-36).
Clean the main charger wire and grid.
Reinsert the connector. Also check for continuity within the
connector cable. If none, remedy or replace the cable.
Check if YC12-5 on the engine PWB goes low when mainte-
nance item U100 is run. If not, replace the engine PWB.
Check if main charging takes place when CN1-8 on the high
voltage PWB goes low while maintenance item U100 is run.
If not, replace the high voltage PWB.
Reinsert the connector. Also check for continuity within the
connector cable. If none, remedy or replace the cable.
Check if the exposure lamp lights when YC1-1 and YC1-6 on
the scanner inverter PWB goes low while maintenance item
U061 is run. If not, replace the scanner inverter PWB.
Check if YC16-1 and YC16-6 on the engine PWB goes low
when maintenance item U061 is run. If not, replace the
engine PWB.
2H0/2HZ
1-4-33