Xerox N2125N - DocuPrint B/W Laser Printer, Service Manual

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02/2000
3-13 DocuPrint N2125
IQ RAP 2 , IQ RAP 3
Image Quality Repair Analysis Procedures Initial Issue
Check for continuity between the Metal Grounding Contacts and the printer frame. There
is continuity between the Grounding Contacts and the printer frame.
Y
N
Replace the Print Cartridge Side Guide (
REP 7.5 ).
The BTR is intact and is free of contamination.
Y
N
Replace the BTR Assembly (
REP 7.1 ).
Generate a Test Print and switch OFF the printer power halfway through the print cycle.
Carefully remove the Print Cartridge and inspect the toner image on the drum just before
the transfer area (BTR). The image on the drum is completely developed; with sharp,
black, easily read areas.
Y
N
Go to
RAP 43 .
Replace in order until the problem is solved: HVPS PWB ( REP 9.6 ), Laser Assembly
( REP 7.4 ), BTR Assembly ( REP 7.1 ), Print Engine Controller PWB ( REP 9.3 ), LVPS PWB
( REP 9.5 ), Print Cartridge Side Guide ( REP 7.5 ).
Problem solved.
IQ RAP 3 Spots
There are spots of toner randomly scattered on the page ( Figure 1 ).
Figure 1 Spots
Initial Actions
• Check that the paper supply is clean, dry and fresh (recycled paper may have spots).
• Ensure there are no obstructions in the Laser path.
• Inspect the printer paper path for items such as staples, paper clips and paper scraps.
• Check installation of the Print Cartridge.
• Check that the Print Cartridge ground contact points are clean.
• Check that rollers and other components in the paper path are clean and unobstructed.
Procedure
Install a new Print Cartridge. Run a Test Print. The spots are gone.
Y
N
Inspect the BTR Assembly for contamination and wear. The BTR is free of contamina-
tion and wear.
Y
N
Replace the BTR Assembly (
REP 7.1 ).
Generate a Test Print and switch OFF the printer power halfway through the print cycle.
Carefully remove the Print Cartridge and inspect the toner image on the drum just before
the transfer area (BTR). The image on the drum is completely developed; with sharp,
black easily read areas and no spots.
Y
N
Go to
RAP 43 .
A B
A B
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