e-STUDIO281c/351c/451c TROUBLESHOOTING June 2005 © TOSHIBA TEC
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3) Poor image density, color reproduction and gray balance Fig.5-3
Cause/Section Step Check items Measures Remarks
Density / Color
reproduction /
Gray balance
1 Check the image density / color
reproduction / gray balance.
Perform the enforced performing of
image quality closed-loop control
(05-395) and then automatic
gamma adjustment.
Printer density 2 Check the density of printer output
image.
Output the test patterns and check
them.
Color: using 04-231 for each color
Black: using 04-113
See step 5
if defect
occurs.
Scanner 3 Check if the original glass, mirrors
or lens is dirty.
Clean it.
Parameter
adjustment value
4 Check the image processing
parameters.
Adjust the color balance (color).
Adjust the image density.
Printer output
image abnormal
5 Is there any faded image (low den-
sity)?
Perform the troubleshooting proce-
dures against the faded image.
Is there any fog in the background? Perform the troubleshooting proce-
dures against the background fog-
ging.
Is there any blotch image? Perform the troubleshooting proce-
dures against the blotch image.
Is there any poor transfer? Perform the troubleshooting proce-
dures against the poor transfer.
Is there any poor cleaning of the
transfer belt? (Check inside the
equipment.)
Correct the transfer belt area.
(Refer to Service Manual)