Image Quality; Initial Check - Oce 3121 Technical & Service Manual

Image quality

1 Initial check

The site
Ensure that the mains supply voltage is according to specifications.
1
Make sure that the site is not subject to ammonium gas.
2
The quality of the documents
Define whether the problem is due to the quality of the documents, or the func-
tion of the machine.
The exposure control should be set to 5 ±1.
1
Copies of documents with a reddish background tend to have a poor contrast.
2
Check the contrast of the documents:- diazo documents or transparencies can
3
produce vague copies,- documents with pencil drawings or pencil text tend to
produce 'light image copies'.
Checking the platen cover, the platen and the standard white plate.
Check that the platen cover, the platen, and the standard white plate are all
clean. Replace as necessary.
Checking the charging rollers
Check that the charging rollers are clean.
1
Checking the quality of the paper
Check that the paper is of a recommended quality.
1
Check that the paper is dry.
2
Try to make copies with fresh paper.
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