Iq Rap 8 Horizontal (Scan) Streaks - Xerox DocuPrint N2025 Service Manual

A
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 7.7).
If the printer has been switched on, the Fuser will be hot.
Open the Exit Assembly. Remove the Fuser Assembly. Turn the Fuser Assembly upside
down. Rotate the fuser idler gear manually and inspect the Heat Roll. Turn the Fuser
Assembly right side up. Open the fuser jam access cover. Rotate the fuser idler gear man-
ually 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 5.1).
Go to RAP 44.
Problem solved.
Initial Issue
DocuPrint N2025/N2825
WARNING

IQ RAP 8 Horizontal (Scan) 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 problem is still
present.
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 8.1).
Remove and reseat the System Controller PWB. If the problems persist, replace the Sys-
tem Controller PWB (REP 8.1).
Install a new Print Cartridge. Run a test print. The horizontal streaks are gone.
Y N
Remove the Print Cartridge. Inspect the Metal Grounding Contact on the rear end of the
Right Print Cartridge Guide. The Metal Grounding Contact is intact and is free of con-
tamination.
Y N
Reform or clean the Metal Grounding Contact, so it makes better contact with the
drum shaft, or replace the Right Print Cartridge Guide (REP 7.2).
A B
02/2000
3-17
Image Quality Repair Analysis Procedures
IQ RAP 7, IQ RAP 8