No Image Appears (Entirely Black) - Kyocera TASKalfa 3050ci Service Manual

(2) No image appears (entirely black).

Print example
No main
charging.
Exposure
lamp fails to
light.
The laser is
activated
simultane-
ously for all
colors.
Causes
Defective connector cable
or poor contact in the con-
nector.
Defective charger roller unit. Replace the charger roller unit
Defective high voltage PWB
1.
Defective engine PWB.
Defective connector cable
or poor contact in the con-
nector.
Defective exposure lamp.
Defective ISC PWB.
Defective main PWB.
Defective laser scanner
unit.
1-4-89
Check procedures/corrective measures
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
High voltage PWB 1 (YC1, 2) and engine
PWB (YC16)
High voltage PWB 1 (YC3, 4) and engine
PWB (YC17)
(see page 1-5-38).
Replace the high voltage PWB 1
(see page 1-5-59).
Replace the engine PWB (see page 1-5-54).
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
LED PWB and ISC PWB (CN6)
ISC PWB (YC3) and main PWB (YC11)
Replace the LED PWB (see page 1-5-19).
Replace the ISC PWB.
Replace the main PWB (see page 1-5-49).
Replace the laser scanner unit
(see page 1-5-25).
2LK/2LN/2LM/2LC