Lexmark X548 Series, Service Manual

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Print quality—horizontal line
Either the photoconductor unit or one of the developer units that make up the imaging unit is defective. Remove
and inspect the imaging unit. Replace the damaged part of the imaging unit. See
“Developer unit removal” on
page 4-47
.
Print quality—insufficient fusing
Print quality—missing image at edge
Remove and reseat the following:
•
Toner cartridge
•
Imaging unit
•
Developer units
4 Does the distance measure 44 or 46 mm?
Replace the developers that
match the missing color
(black, cyan, magenta, or
yellow). See
“Developer
unit removal” on
page 4-47
.
Check the various rollers in
the printer for debris.
Step Questions / actions Yes No
1
Is the printer setup to use the correct media? Go to step 2. Change the settings to
indicate the correct media.
2
Check the fuser connections on the left and
right side of the printer.
Are the cables and connection correct?
Go to step 3. Properly reconnect or
replace the cables.
3
Is the fuser properly installed? Go to step 4. Install the fuser properly.
4
Replace the fuser. See
“Fuser assembly
removal” on page 4-32
.
Does this fix the problem?
Problem resolved. Replace the LVPS. see
“Low-voltage power
supply (LVPS) assembly
removal” on page 4-48
.
Step Questions / actions Yes No