Epson L800, Service Manual

Page: 85 / 107

L800/L801 Revision A
Adjustment Banding Reduction System (BRS) Adjustment / Paper Feed Amount Profile (PFP) Correction 84
Confidential
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Adjustment Flow
Carry out the adjustment following the adjustment flow below.
Figure 2-12. BRS/PFP Adjustment Flow
Note*: When a PFP pattern is judged as NG, repeat the steps as described below.
First time NG: retry from step
Second time NG:retry from step
Third time NG: perform step
C H E C K
P O I N T
Depending on the sensor type of the scanner to use for the
adjustment, drying time required after the BRS adjustment
pattern has been printed differs. For PFP adjustment pattern/PFP
check pattern, drying time is not required.
̈
For “CCD” sensor:
Printed pattern can be scanned straight away. (Drying time of
about 2 minutes is recommended.)
̈
For “CIS” sensor:
Printed pattern needs to be dried more than 5 minutes.
C H E C K
P O I N T
When an error is displayed in the Adjustment program, check the
points below, then carry out the adjustment again. If an error
occurs even after checking the points below, change the scanner
with a different one and carry out the adjustment again.
1. Check that the printer that printed the pattern and the printer
to register the adjustment value is the same.
2. Check that the printed pattern is placed on the document table
of the scanner correctly.
3. Check that there is no gap between the PFP Base Scale and the
pattern printed sheet.
4. Check that the scanner glass surface and the PFP Base Scale is
free from any dirt or dust.
START
Error?
END
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*
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Judge it is mechanism’s
failure. Remove it to
locate the defective part
and replace, then
reassemble it.
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Error?
NG
NG
NG
OK
OK
OK
Printing the BRS
Adjustment Pattern
Scanning the BRS
Adjustment Pattern
Printing the PFP
Adjustment Pattern
Scanning the PFP
Adjustment Pattern
Printing the PFP Check
Pattern
Judging the Check
Pattern
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