Lexmark C734 series, Service Manual

Page: 168 / 436

2-134
Service Manual
5026
Print quality—residual image
Service tip: Install a new print cartridge if available before doing this service check. Residual image can be
caused by the photoconductor, cleaning blade, and other parts inside the print cartridge.
Print quality—solid color page
Service tip: A solid color page is generally caused by a problem in the high voltage system or an incorrect high
voltage in the printing process resulting in toner development on the entire photoconductor drum.
Step Questions / actions Yes No
1 Is there any toner contamination on the fuser
assembly? Replace the fuser. See
“Fuser removal” on
page 4-90
.
Contact your next level of
support.
Step Questions / actions Yes No
1 Replace the photoconductor unit for the color
in question.
Does this fix the problem?
Problem solved. Go to step 2.
2 Check the high voltage contact from the
HVPS 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
to view the proper mounting and for removal
procedures.
Are the spring(s) defective?
Replace the transfer
contact assembly. Go to step 3.
Note: Printer is shown with
components removed for
clarity
High volt power supply
High volt contact path