No Image Appears (Entirely White); No Image Appears (Entirely Black) - Kyocera ECOSYS M6026cdn 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.
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 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. Replace the drum unit (see page 1-5-21).
Defective high voltage
PWB.
Defective engine PWB.
Defective connector cable
or poor contact in the con-
nector.
Defective inverter PWB or
CCD PWB.
Defective main PWB.
Defective laser scanner
unit.
1-4-29
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 1-5-35).
Replace the engine PWB (see page 1-5-27).
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 1-5-35).
Replace the engine PWB (see page 1-5-27).
Replace the laser scanner unit KM/CY
(see page 1-5-45).
Replace the engine PWB (see page 1-5-27).
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 1-5-35).
Replace the engine PWB (see page 1-5-27).
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
Exposure lamp and inverter PWB (CN2)
Inverter PWB (CN1) and CCD PWB (YC3)
CCD PWB (YC1) and main PWB (YC8)
Replace the scanner unit (see page 1-5-48).
Replace the main PWB (see page 1-5-30).
Replace the laser scanner unit KM/CY
(see page 1-5-45).
2PV/2PW