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4
Not conducting between the
device and OPC in the drum unit.
Replace the Power Supply Board.
<Step 1>,<Step 2>, use a three-purpose meter to check:
Possible
Step
Check
Result
Action
Cause
Yes
Replace the drum unit.
Drum unit
1
If it conducting between
the drum unit and the high
voltage
No
Replace the Power Supply
Board.
poor grounding
2
If it conducting between
the drum unit and the high
voltage
User Check
(1) If the charger unit is correctly installed.
(2) Replace the charger unit.
■ A Black Image
Step
Cause
Solution
1
Charger malfunctioned or corona
wire broken.
Replace the drum unit.
Clean the electrode between the corona
wire and Power Supply Board.
2
Dirt on the electrode between the
corona wire and the Power Supply
Board.
3
HVPS malfunctioned.
Replace the Power Supply Board.
4
Main board malfunctioned.
Replace the main board..
User Check
(1) If the printer has been evenly positioned.
(2) Clean the LPH unit.
(3) Reinstalled the drum unit.
(4) Replace the drum unit.
■ A Blur Image
Step
Cause
Solution
1
Drum unit positioning point is
broken
Replace drum unit.
Confidential
29