Moire/Lack Of Sharpness - Toshiba e-STUDIO281c Service Handbook

5) Moire/lack of sharpness

Moire
Cause/Section Step
Density repro- 1 Check the gradation
duction reproduction.
Parameter 2 Check the image process-
adjustment value ing parameters.
3 Adjust the image process-
ing parameters.
Printer section 4 Check the printer output
image.
Lack of sharpness
Cause/Section Step
Density repro- 1 Check the gradation
duction reproduction.
Parameter 2 Check the image process-
adjustment value ing parameters.
3 Adjust the image process-
ing parameters.
* If the trouble is not solved at the step 1 and the step 2 or followings (excluding the parameter adjust-
ment) are performed, make sure to perform "Enforced performing of image quality closed-loop con-
trol" and then "Automatic gamma adjustment" after taking a measure.
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A
Fig. 5-5
Check items
Perform the forced performing of
image quality closed-loop control
(05-395) and then automatic
gamma adjustment.
Check the sharpness adjustment
value.
While checking the above encir-
cled images A and B, decrease
moire by sharpness adjustment.
Output the test patterns and check
them.
Color: using 04-231 for each color
Black: using 04-113
Check items
Perform the forced performing of
image quality closed-loop control
(05-395) and then automatic
gamma adjustment.
Check the sharpness adjustment
value.
While checking the above encir-
cled image A, increase sharpness
by sharpness adjustment.
5 - 119
B
Measures
When defects occur,
perform the corre-
sponding trouble-
shooting procedures.
Measures
e-STUDIO281c/351c/451c
Remarks
Remarks
TROUBLESHOOTING
5