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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.