Marks On Paper Service Check - Lexmark C91x Service Manual

5055-xxx
FRU
3 • Registration roller
• Paper exit rollers
• Registration sensor
• Registration clutch
• Punch clutch punch
unit
• Timing belt
4 • Elevator motor
• Tray wires

Marks on paper service check

If you have evenly spaced marks on the paper, measure the
distance between the marks and locate the symptom below. Check
the assembly for dirt or damage and clean as necessary. Run a test
print to verify the problem has been corrected. The indicated
assemblies are replaced by the customer at prescribed intervals.
If you remove the transfer belt, do not turn it upside down. Toner will
fall from the waste toner box onto the transfer sheets and roller(s)
inside the belt. This causes lower transfer efficiency and washed out
colors.
Distance between marks
27 mm
31.5 mm
45.1 mm
46.9 mm
46.9 mm
47.5 mm
64.5 mm
94.2 mm
139.2 mm
2-72
Service Manual
Run the hole punch test in diagnostic mode
to test the hole punch function.
Observe the elevator motor operation while
powering the printer up.
FRU / supply item
Absorption/charge roller (transfer
roller)
Photodeveloper charge roller
Supply roller (toner cartridge)
Upper registration roller
Lower registration roller
Developer roller (toner cartridge)
OCR (oil coating roller)
Photodeveloper drum
Fuser upper roller
Action