Xerox Phaser 790, Service Manual

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3-21 Phaser 790/DocuColor 2006
IQ18
Image Quality Initial Issue
IQ18 Spots RAP
Initial Actions
Ensure that the paper in use is fresh, dry, and within specification for weight and quality.
Compare the spots against the samples in the Image Quality Defects supplement. If the defect
matches the Debris Centered Deletions sample, go to the IQ9 RAP. If the defect matches the
Drum Defect sample, replace the Copy/Print Cartridge (PL 5.1).
Procedure
The defect occurs in Copy mode only.
Y
N
The spots occur at a fixed interval on each print.
Y
N
The spots occur in the same location on every letter size print.
Y
N
The spots occur in the same location on every other letter size print, or in
the same location on every 11 X17 in/A3 print.
Y
N
The problem is Fuser offset.
Y
N
CAUTION
Do not use a vacuum cleaner or any solvents in the following step.
Damage to the Belt Cleaner will result.
Remove the Belt Cleaner (REP 9.17). Carefully clean the cleaning
blade and the Mylar shield with a soft brush or a lint free cloth. Brush
away any accumulation of toner on the foam seal and the outside
surfaces. Wipe the surface of the IBT Belt with a lint free cloth.
If the problem continues, replace the Belt Cleaner (PL 7.1).
• Check the Fuser Nip (ADJ 10.1).
• Check the Heat Roll and Pressure Roll for dirt, damage, or toner
buildup. Clean or replace as required(PL 8.3).
Check the IBT Belt for dirt or damage. Clean or replace as required(PL 7.2).
Check the Copy/Print Cartridge for dirt or damage. Clean or replace as required(PL
5.1).
Go to the IQ16 RAP.
Ensure that the original is free from the defect.
Clean the Platen Glass and Lens.