Light Image; Dark Image Or Completely Black Print - Xerox Phaser 3150 Service Manual

7.1.5 Light Image

Example
The printed image is too light, with no ghosting.
1. Toner Save mode is enabled.
2. The developer roller is
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contaminated or the toner cartridge
is almost empty.
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3. The ambient temperature is below
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10
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4. Bad contact caused by dirty
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terminals on the toner cartridge or
inside the printer.
5. Abnormal output voltage from the
HVPS.

7.1.6 Dark Image or Completely Black Print

Example
The printed image is dark or the page is entirely black.
1. Charge voltage fault due to bad
contact between the toner cartridge
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and printer contacts.
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2. No charge voltage in the engine
board.
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3. VD0 signal on the main board is in
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a LOW state.
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Possible Cause
o
C.
Possible Cause
Sequence of Repair Actions
a. Turn Toner Save mode off.
b. Replace the toner cartridge and re-test.
c. Cycle power to the printer and wait
30 minutes then try printing again.
d. Clean the cartridge and printer contacts.
e. Clean the inside of the printer.
f. Replace the HVPS if none of the above
procedures fix the problem.
Sequence of Repair Actions
a. Clean the high voltage contact terminals.
b. Check the state of the connector between
the main board and the HVPS.
c. Replace the HVPS.
d. Replace the laser unit.
e. Replace the main board.
Service Manual 7-3
Troubleshooting