Poor Image Density, Color Reproduction And Gray Balance - Toshiba e-STUDIO281c Service Handbook

3) Poor image density, color reproduction and gray balance

Check gray balance.
Check color reproduction.
Cause/Section Step
Density / Color 1
reproduction /
Gray balance
Printer density 2
Scanner 3
Parameter 4
adjustment value
Printer output 5
image abnormal
e-STUDIO281c/351c/451c
TROUBLESHOOTING
Check items
Check the image density / color
reproduction / gray balance.
Check the density of printer output
image.
Check if the original glass, mirrors
or lens is dirty.
Check the image processing
parameters.
Is there any faded image (low den-
sity)?
Is there any fog in the background? Perform the troubleshooting proce-
Is there any blotch image?
Is there any poor transfer?
Is there any poor cleaning of the
transfer belt? (Check inside the
equipment.)
Check image density.
Check color reproduction.
Fig. 5-3
Measures
Perform the enforced performing of
image quality closed-loop control
(05-395) and then automatic
gamma adjustment.
Output the test patterns and check
them.
Color: using 04-231 for each color
Black: using 04-113
Clean it.
Adjust the color balance (color).
Adjust the image density.
Perform the troubleshooting proce-
dures against the faded image.
dures against the background fog-
ging.
Perform the troubleshooting proce-
dures against the blotch image.
Perform the troubleshooting proce-
dures against the poor transfer.
Correct the transfer belt area.
(Refer to Service Manual)
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Remarks
See step 5
if defect
occurs.