Canon GP405, GP605, GP160, Gp-335, Gp-605v Service Bulletin GP605-002

Service Bulletin

Issued by Canon Europa N.V.

COPIER

Model :

Location :

Subject :

Reason :

GP605

SERVICE MANUAL

IMAGE ADJUSTMENT BASIC PROCEDURE

The steps used in the procedure have been updated to prevent darkening of image, possibly occurring
when perfo rming the “Image Adjustment Basic Procedure” found in the Service M anual (pp.13-3
through –5).
Reference:
A digital copier is designed to perform the following to im prove reproduction of images:

1. edge emphasis processing

2. density processing
As a result, images from a digital copier generally tend to appear darker than ones produced by an
analog copier.

No.:

DATE:

GP605-002
(FF-T01-K1-000007-01)

09.04.99

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A. Image Adjustment Basic Procedure

GP605-002

<Making Pre-Checks>

1 Making Pre-Checks

Clean the following:
[1] grid wire
[2] primary charging wire
[3] pre-transfer charging wire
[4] transfer charging wire

Check the following:
[1] height of the charging wire

Using the NA3 Chart, make two
copies in the following mode:
[1] AE
[2] text
[3] text/photo

Generate several test pages of the
following:
[1] PG4: halftone (printer)
[2] PG6: blank (reader)
[3] PG7: halftone (reader)
[4] PG8: solid black (reader)

Output Conditions

• F value at 5

• potential control ON

If the test print
has an error,

Go to

2 Checking the Printer Side (1/2)

If only the copy image
has a fault,

Go to

3 Checking the Scanner Side

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