Print Quality Solid Color Page Service Check; Print Quality Vertical Banding Service Check; Print Quality Light Print On Solids Service Check - Lexmark CX310n Service Manual

Print quality solid color page service check

Service tip: A solid color page is generally caused by a problem in the high‑voltage power supply or an incorrect high
voltage in the printing process resulting in toner development on the entire photoconductor.
Step 1
Replace the photoconductor unit (part of the 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 (IU) removal" on page
Does this fix the problem?
Step 2
A faulty printhead can cause the problem. To 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. Select the
Print Quality Page.
Does the uniform color page have a white vertical band?
Step 3
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 HVPS spring
that runs through the left printer frame. See
removal" on page 294 to view the proper mounting and for removal
procedures.
Are the springs defective?
Step 4
Turn the printer off, and check the continuity of the HVPS cable.
Is there continuity?
Step 5
Replace the HVPS. See "High‑voltage power supply (HVPS) removal" on
page 262.
Did this solve the problem?

Print quality vertical banding service check

Replace the developer cartridge.

Print quality light print on solids service check

Light print can be caused by incorrect media. For more information, see
Check
266.
"Toner cartridge contacts
Diagnostic information
Yes
Problem resolved.
"Imaging
Replace the printhead.
See "Printhead
removal" on page
292.
Replace the transfer
contact assembly. See
"Toner cartridge
contacts removal" on
page 294.
Go to step 5.
Problem resolved.
"Media guidelines" on page
36
7527
No
Go to step 2.
Go to step 3.
Go to step 4.
Replace the cable
assembly.
Replace the controller
board. See "Controller
board removal" on
page 239.
19.