Toshiba e-Studio3511 Service Handbook page 422

(3) Poor image density, color reproduction and gray balance
Check gray balance.
Cause/Section Step
Density / Color
reproduction / Gray
balance
Printer density
Scanner
Parameter
adjustment value
Printer output image
abnormal
* If the trouble is not solved at the step 1 and the step 2 or followings (excluding the parameter adjustment) are
performed, make sure to perform "Enforced performing of image quality closed-loop control" and then "Automatic
gamma adjustment" after taking a measure.
e-STUDIO3511/4511 TROUBLESHOOTING
Check items
1 Check the image density / color
reproduction / gray balance.
2 Check the density of printer
output image.
3 Check if the original glass,
mirrors or lens is dirty.
4 Check the image processing
parameters.
5 Is there any faded image (low
density)?
Is there any fog in the back-
ground?
Is there any blotch image?
Is there any poor transfer?
Is there any poor cleaning of the
transfer belt?
(Check inside the equipment.)
Fig. 5-204
Check color reproduction.
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
procedures against the faded
image.
Perform the troubleshooting
procedures against the back-
ground fogging.
Perform the troubleshooting
procedures against the blotch
image.
Perform the troubleshooting
procedures against the poor
transfer.
Correct the transfer belt area.
(Refer to Service Manual)
5 - 108
Check image density.
Remarks
See step 5 if
defect occurs.
November 2003 © TOSHIBA TEC