Toshiba DP120F Service Manual page 687

4.7.3 Vertical White Line(s)
Step
1
Is the white line generated on the Magnet
roller of the Developer assembly.
2 Is the Transfer charger dirty?
3 Is the lens of the LSU dirty?
4
When no problem is found in the steps
above, the Developer assembly may be
defective.
4.7.4 Completely Black
Step
1 Are the terminals inside the machine (rear
side) dirty or deformed?
2 Is the charger wire in the Drum unit bro-
ken?
3
When no problem is found in the steps
above, the Drum unit, the LSU or PBA's
may be defective.
4.7.5 Completely White
Step
1 Is the belt of the Developer assembly dis-
located?
2 Is the Drum unit or Developer assembly
improperly mounted?
3
Are the terminals of the Developer assem-
bly and the Drum unit dirty or bent?
4 Are the terminals on both sides of the pa-
per guide dirty.
5
Is the Transfer charger broken?
6
Is the lens of the LSU dirty?
7
When no problem is found in the steps
above, the Developer assembly, the LSU
or the PBA's may be defective.
March 2000 © TOSHIBA TEC
Check points
Check points
Check points
Clean the Magnet roller using a Mylar
scarper.
Clean or replace the Transfer charger.
Clean the lens.
Replace the Developer assembly.
Clean or correct the terminals.
Replace the Drum unit.
Replace in the order of: Drum unit, LSU,
HVPS, Main PBA.
Remove the cover and mount the belt
properly.
Mount the Drum unit and the Developer
assembly properly.
Clean the terminals using a dry cloth or
repair them using cutting pliers.
Clean the terminals using a cotton swab.
Replace the Transfer unit.
Clean the lens.
Replace in the order of: Developer assem-
bly, LSU, HVPS, Main PBA.
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Solutions
Solutions
Solutions
DP120F/DP125F Troubleshooting