Lexmark X543 - Print Quality-Horizontal Line; Print Quality-Insufficient Fusing; Print Quality-Missing Image at Edge; Print Quality-Mottle (2-5 Mm Speckles)

2-56 Service Manual
7525-xxx
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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 “Imaging unit (IU) removal”
on page 4-45.
Print quality—insufficient fusing
Print quality—missing image at edge
Remove and reseat the following:
• Toner cartridge
• Imaging unit
• Developer units.
Print quality—mottle (2–5mm speckles)
Keep running prints through, and the problem normally clears up. If the problem persists,
replace the developer cartridge.
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 4-28.
Does this fix the problem?
Problem resolved. Replace the LVPS. see
“Low-voltage power
supply (LVPS) assembly”
on page 4-48.