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

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02/2000
3-18 DocuPrint N2125
IQ RAP 7 , IQ RAP 8
Initial Issue Image Quality Repair Analysis Procedures
Y N
Remove any obstructions from the laser beam path.
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 ).
WARNING
If the printer has been switched on, the Fuser will be hot.
Open the Rear Cover. Remove the Fuser Assembly. Rotate the fuser idler gear manually
and inspect the Heat Roll. Open the fuser jam access cover. Rotate the fuser idler gear
manually and inspect the Pressure Roll. The Heat Roll and the Pressure Roll are free
of scratches and contamination.
Y
N
Replace the Fuser Assembly (
REP 6.2 ).
Go to RAP 44
Problem solved.
IQ RAP 8 Horizontal Streaks
There are black lines running horizontally across the page (at a right angle to the direction of
paper travel) (
Figure 1 ).
Figure 1 Horizontal Streaks
Initial Actions
• Check that the paper supply is dry and fresh.
• 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.
Procedure
Enter Diagnostics and select Test Print. Scroll to Print Pattern and press Enter [4]. Run five test
prints. The test prints have horizontal streaks.
Y
N
Exit diagnostics and enter the Menu Mode. Print a Config Sheet. The prints have hori-
zontal streaks.
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. The horizontal streaks are gone.
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 it makes better contact with the
drum shaft, or replace the Print Cartridge Side Guide (
REP 7.5 ).
A
A B