2KN/2KP
1-4-52
(2) No image appears (entirely black).
Copy example Causes Check procedures/corrective measures
No main
charging.
Poor insertion main
charger unit.
Reinstall the main charger unit.
Broken main charger
wire.
Replace the wire (see page 1-5-27).
Leaking main charger
housing.
Clean the main charger wire and grid.
The connector terminals
of the high voltage PWB
make poor contact.
Reinsert the connector. Also check for continuity within the
connector cable. If none, remedy or replace the cable.
Defective engine PWB. Check if YC7-9 on the engine PWB goes low when mainte-
nance item U100 is run. If not, replace the engine PWB.
Defective high voltage
PWB.
Check if main charging takes place when YC1-3 on the high
voltage PWB goes low while maintenance item U100 is run.
If not, replace the high voltage PWB.
Exposure
lamp fails to
light.
The connector terminals
of the exposure lamp
make poor contact.
Reinsert the connector. Also check for continuity within the
connector cable. If none, remedy or replace the cable.
Defective inverter PWB. Check if the exposure lamp lights when CN2-1 and CN2-4
on the inverter PWB go low while maintenance item U061 is
run. If not, replace the inverter PWB.
Defective scanner PWB. Check if YC4-3 on the scanner PWB goes low when main-
tenance item U061 is run. If not, replace the scanner PWB.
CIS fails to
light.
The connector terminals
of the CIS make poor
contact.
Reinsert the connector. Also check for continuity within the
connector cable. If none, remedy or replace the cable.
Defective DP inverter
PWB.
Check if the CIS lights when the connectors on the DP
inverter PWB go low while maintenance item U061 is run. If
not, replace the DP inverter PWB.
Defective DP main PWB. Check if YC12-2 on the DP main PWB goes low when
maintenance item U061 is run. If not, replace the DP main
PWB.
The laser of
laser scan-
ner unit has
lit up all.
Defective laser scanner
unit.
Replace the laser scanner unit (see page 1-5-36).
Defective main PWB. Replace the main PWB.
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