No Image Appears (Entirely Black) - Olivetti d-Color P2026 Service Manual

(1) No image appears (entirely white).
Print example
Defective
transfer
bias output.
Defective
developing
bias output.
No LSU
laser is out-
put.

(2) No image appears (entirely black).

Print example
No main
charging.
The laser is
activated
simultane-
ously for all
colors.
Causes
Defective connector cable
or poor contact in the con-
nector.
Defective high voltage
PWB.
Defective engine PWB.
Defective connector cable
or poor contact in the con-
nector.
Defective high voltage
PWB.
Defective engine PWB.
Defective laser scanner
unit.
Defective engine PWB.
Causes
Defective connector cable
or poor contact in the con-
nector.
Defective charger roller unit.
Defective high voltage
PWB.
Defective engine PWB.
Defective laser scanner
unit.
1-4-30
Check procedures/corrective measures
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
High voltage PWB and engine PWB (YC11)
Replace the high voltage PWB
(see page 1-5-34).
Replace the engine PWB (see page 1-5-26).
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
High voltage PWB and engine PWB (YC11)
Replace the high voltage PWB
(see page 1-5-34).
Replace the engine PWB (see page 1-5-26).
Replace the laser scanner unit KM/CY
(see page 1-5-43).
Replace the engine PWB (see page 1-5-26).
Check procedures/corrective measures
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
High voltage PWB and engine PWB (YC11)
Replace the drum unit (see page 1-5-20).
Replace the high voltage PWB
(see page 1-5-34).
Replace the engine PWB (see page 1-5-26).
Replace the laser scanner unit KM/CY
(see page 1-5-43).