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PRINTING QUALITY PROBLEMS
4.5.5 LIGHT IMAGE
Description: Printed image is too light (no "ghosting").
Cause
1.
Toner save mode is enabled.
2.
Developer roller is contaminated or the
toner cartridge is almost empty.
3.
Ambient temperature is below 10 C.
4.
Bad contact due to dirty terminals on the
toner cartridge set.
5.
Abnormal output from the HVPS.
4.5.6 DARK/BLACK IMAGE
Description: Printed image is dark/black.
Cause
1.
No charge voltage from the engine board.
2.
Charge voltage fault due to bad contact
between toner cartridge and cartridge set.
3.
VD0 signal from main PBA is low.
B273
1.
Turn the toner save more off.
2.
Replace the toner cartridge.
3.
Turn the machine off. Wait 30 minutes
and turn the machine on again. Attempt to
print.
4.
Clean dirt from the toner cartridge and
cartridge set contacts.
5.
Replace the HVPS.
1.
Check the connector that connects the
HVPS and the engine board.
2.
Clean the high-voltage charge terminals.
Replace the HVPS if the problem
persists.
3.
Replace the LSU or main PBA.
4-22
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
B273T917.WMF
Solution
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
B273T919.WMF
Solution
SM
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