Iq Rap 11 Background; Iq Rap 12 Uneven Density - Xerox N2125N - DocuPrint B/W Laser Printer Service Manual

IQ RAP 11 Background

There is toner contamination on all or part of the page. The contamination appears as a very
light gray dusting (Figure 1).
Figure 1 Background
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 the machine covers are in place and fit well so no outside light can enter the
machine.
Procedure
Install a new Print Cartridge (PL 8.1). Run a Test Print. The background is gone.
Y N
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 undeveloped areas of the drum are clean and without
background.
Y N
Go to RAP 43.
Clean or replace the Fuser Assembly
Y N
Replace the following, in order, until the defective component is found: HVPS PWB
(REP 9.6), Fuser Assembly (REP
Assembly (REP 7.4), Print Cartridge Side Guide
PWB (REP 9.3).
Problem solved.
Problem solved.
Initial Issue
DocuPrint N2125
(REP 6.2). The background is gone.
6.2), Chute Transport Assembly (REP 6.1), Laser
(REP 7.5), Print Engine Controller

IQ RAP 12 Uneven Density

Image density varies within the page in either direction
Initial Actions
• Load fresh dry paper.
• Check that the correct Print Cartridge is properly installed and not empty.
• Ensure that the machine is reasonably level.
• Check to make sure the Laser path is clean and unobstructed.
• Remove the Print Cartridge and check the Left and Right Guides for ware, contamination,
obstructions, etc.
• Clean the Laser window.
Procedure
Run a Test Print. The Test Print output image contains uneven print.
Y N
Go to Final Actions.
Install a new Print Cartridge (PL
tains uneven print.
Y N
Problem solved. Go to Initial
Check the Bias Transfer Roll (BTR) for contamination, even spring pressure, and proper instal-
lation. The BTR is in good condition (not contaminated) and properly installed.
Y N
Repair or replace the BTR Assembly
Check the Fuser Assembly for worn parts and for contamination on the Fuser Roll or Pressure
Roll. The Fuser Assembly is in good condition.
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(Figure 1).
Figure 1 Uneven Density
8.1). Run a Test Print. The Test Print output image con-
Actions.
(REP 7.1).
Image Quality Repair Analysis Procedures
IQ RAP 11 , IQ RAP 12