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

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02/2000
3-12 DocuPrint N2125
IQ RAP 1 , IQ RAP 2
Initial Issue Image Quality Repair Analysis Procedures
Y N
Clean the Laser window and remove any obstructions from the laser beam
path.
The BTR is intact and is free of contamination.
Y
N
Replace the BTR (
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 devel-
oped with sharp, black, easily read areas.
Y
N
Go to (
RAP 43 )
Inspect the toner image on the drum immediately after the transfer area (BTR). The
toner image on the drum is transferred completely to the paper.
Y
N
Go to (
RAP 43 )
Replace in order until the problem is solved: BTR Assembly ( REP 7.1 ), Fuser
Assembly ( REP 6.2 ), HVPS PWB ( REP 9.6 ), Laser Assembly ( REP 7.4 ), LVPS
Assembly ( REP 9.5 ), Print Cartridge Side Guide ( REP 7.5 ), Print Engine Controller
PWB ( REP 9.3 ), Chute Transport Assembly ( REP 6.1 ).
Go to RAP 23 .
Problem Solved.
IQ RAP 2 Blank Prints
No visible image anywhere on the output print ( Figure 1 ).
Figure 1 Blank Prints
Initial Actions
• 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.
• Ensure there are no obstructions in the Laser path.
• Ensure the blank prints are not the result of multisheet feeds.
Procedure
Enter Diagnostics and select Test Print. Scroll to Print Pattern and press Enter [4]. Run five test
prints. The test prints are blank.
Y
N
Exit diagnostics and enter the Menu Mode. Print a Config Sheet. The prints are blank.
Y
N
The problem appears to be with the host computer or the cables. If the problems per-
sist, replace the System Controller PWB (
REP 9.2 ).
Remove and reseat the System Controller PWB. If the problems persist, replace the Sys-
tem Controller PWB (
REP 9.2 ).
Install a new Print Cartridge. Run a test print. There is a normal image on the paper.
Y
N
Remove the Print Cartridge. Inspect the Metal Grounding Contacts on the Print Cartridge
Side Guide. The Metal Grounding Contacts are intact and is free of contamination.
Y
N
Reform or clean the Metal Grounding Contacts, so they make better contact with the
drum shaft, or replace the Print Cartridge Side Guide (
REP 7.5 ).
A B
A B