Print Quality-Blurred Or Fuzzy Print; Print Quality-Half-Color Page; Print Quality-Horizontal Banding - Lexmark C520 Series Service Manual

5022-xxx
Potential cause
5 HVPS cable
6 HVPS
7 Printhead
8 System card
Print quality—blurred or fuzzy print
Blurred or fuzzy print is usually caused by a problem in the EP drive assembly or in the transfer belt assembly.
Check the EP drive assembly and transfer belt assembly for correct operation.
Blurred print can also be caused by incorrect feeding from one of the input paper sources, paper trays, or duplex
paper path.
Check the high voltage spring contacts to ensure they are not bent, corroded, or damaged. Replace as
necessary.
Print quality—half-color page
Potential cause
1 Photoconductor unit
Print quality—horizontal banding
Potential cause
1 Developer cartridge
2 Photoconductor unit
2-70
Service Manual
Action
Turn the printer off and check the continuity of the HVPS cable. If
incorrect, replace the cable assembly.
Replace the HVPS. Go to
removal" on page 4-55.
Replace the printhead. Go to
Replace the system card. Go to
page 4-47.
Action
Photoconductor unit is not properly seated. Reseat the specific pho-
toconductor unit.
Action
Measure distance between bands. Faulty developer cartridge will
measure either 27 or 36mm between bands.
Measure distance between bands. Faulty photoconductor unit will
measure 72mm between bands.
"High volt power supply (HVPS)
"Printhead removal" on page
"System card removal" on
4-52.