January 2000 © TOSHIBA TEC
4 - 61
FC-22
TROUBLESHOOTING
Moire
Lack of sharpness
A
B
(5) Moire/lack of sharpness
Cause/Defect area
Step
Check items
Measures
Remarks
Density reproduction
1
Image density reproduction
Perform automatic adjustment of
defect
gamma correction.
Parameter adjustment
2
Check image processing
Check sharpness adjustment value.
value
parameters.
Printer section
3
Check printer image.
Output test print image (04-231)
When defects occur,
for each color and check.
perform the corre-
sponding trouble-
shooting procedures.
4
Adjust image processing
While checking the above encircled
parameters.
images A and B, control moire by
sharpness adjustment.
Cause/Defect area
Step
Check items
Measures
Remarks
Density reproduction
1
Image density reproduction
Perform automatic adjustment of
defect
gamma correction.
Parameter adjustment
2
Check image processing
Check sharpness adjustment value.
value
parameters.
Printer section
3
Check printer image.
Output test print image (04-231)
When defects occur,
for each color and check.
perform the corre-
sponding trouble-
shooting procedures.
4
Adjust image processing
While checking the above encircled
parameters.
image A, modify sharpness by
sharpness adjustment.
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