Toshiba e-STUDIO5540C Service Manual page 298

8.5.5 Background fogging
Cause/Section Step
Adjustment 1 Perform the shading correction. Perform 05-3218.
Density 2 Check the gradation
reproduction reproduction.
Printer section 3 Check the printer output image. Output the test patterns and
Scanner 4 Check if the original glass,
mirrors or lens is dirty.
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Fig.8-12
Check item
If an error occurs, retry it. If the
error still persists, clean the
original glass.
Perform the forced performing
of image quality closed-loop
control (05-2742) and then
automatic gamma adjustment.
check them.
Color: using 04-231 for each
color
Black: using 04-113
Clean it.
8 - 297
Measures
e-STUDIO5540C/6540C/6550C/5560C/6560C/6570C
ERROR CODE and TROUBLESHOOTING
8
Remarks
See step
7 if
defects
occur.