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2-90 Service Manual
5016-001
Random Marks Service Check
Note: Loose material moving inside the printer and attaching to the
photoconductor, ITM Belt, or transfer roll, is the primary cause of
random marks
.
Residual Image Service Check
FRU Action
1 Random Marks Check the print cartridges for signs of loose or
foreign material that might be on the
photoconductor.
Check the ITM belt and transfer roll for material
stuck to the belt or imbedded in the roll.
FRU Action
1 Print Cartridge The print cartridges can cause a residual image
due to a defective cleaning blade, photoconductor
or other parts inside the print cartridge. Determine
which cartridge is causing the problem.
2 Fuser Assembly Check the fuser assembly for signs of toner
contamination. The hot roll might retain toner
deposit on the page.
3Erase Lamp
Assembly
If the cartridges and fuser assembly do not have a
problem, go to the “Erase Lamp Service Check”
on page 2-50.