Print Quality-Solid Color Page - Lexmark X548 Series Service Manual

Print quality—solid color page
Service tip: A solid color page is generally caused by a problem in the high-voltage
controller or an incorrect high voltage in the printing process resulting in toner
development on the entire photoconductor drum.
Step Questions / actions
Replace the photoconductor unit (part of the
1
imaging unit). Remove the imaging unit and
remove the developers. Place the original
developers in the new photoconductor, and
then replace the imaging unit. See
unit removal" on page
Does this fix the problem?
A faulty printhead can cause the problem. To
2
test the printhead for solid colors, place a
narrow strip of paper over the gap between the
developers. Make sure the paper stays in
place when you replace the imaging unit. This
will block the laser from discharging the
photoconductors. Print a Quality Test Page.
Does the page have a white vertical band?
Check the high-voltage contact from the HVPS
3
to the photoconductor charge roll. Ensure the
contact springs are properly mounted and that
the charge roll contact spring is making good
contact with the HPVS spring that runs through
the left printer frame. See
contacts removal" on page 4-64
proper mounting and for removal procedures.
Are the spring(s) defective?
Turn the printer off, and check the continuity of
4
the HVPS cable.
Is there continuity?
Replace the HVPS. See
5
supply (HVPS) with spring assembly
removal" on page
Does this solve the problem?
"Developer
4-47.
"Toner cartridge
to view the
"High-voltage power
4-40.
Yes
Problem resolved.
Replace the printhead. See
"Printhead removal" on
page 4-61.
Replace the transfer contact
assembly. See
"Toner
cartridge contacts
removal" on page 4-64.
Go to step 5.
Problem resolved.
7525-63x
No
Go to step 2.
Go to step 3.
Go to step 4.
Replace the cable
assembly.
Replace the RIP board. See
"RIP board removal" on
page 4-19.
Diagnostic information
2-53
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