Solid Dark Or Dirty Prints, No Border - Xerox phaser 6250 Service Manual

Solid Dark or Dirty Prints, No Border

The prints appear very dirty and brown over
the entire page.
This print-quality symptom is a composite
image of all colors with no margin. This is
caused by a charge voltage failure. For
information on the Imaging Unit charge
contacts, see "Theory of Operation" on
page 2-1.
Troubleshooting Procedure
Step Check
1 Is the problem resolved after
replacing the Imaging Unit?
2 Inspect the Imaging Unit charge
voltage contacts (PL9.1.5) and the
Bias Housing Assembly (PL 9.1.4) in
the printer for any damage or
defects. See "Imaging Unit Charge
Voltage Contacts" on page 2-36.
3 Is the problem resolved after
replacing the Sub-High Voltage
Supply Board, page 8-87?
Note
After replacing any component in Step 2 or 3, run the Clean the Imaging Unit
from the Maintenance section of Service Diagnostics. See "Service Diagnostic
Tests" on page 3-9.
Print-Quality Troubleshooting
Yes
Complete
Complete
Complete
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6200-292
No
Go to Step [2].
Go to Step [3].
Replace the Engine
Control Board,
page 8-107.
5-15