Poor Image Density, Color Reproduction And Gray Balance - Toshiba e-STUDIO 5540C Service Manual

8.5.4

Poor image density, color reproduction and gray balance

Check gray balance.
Check color reproduction.
Cause/Section Step
Density / Color 1 Check the image density / color
reproduction / reproduction / gray balance.
Gray balance
Printer density 2 Check the density of printer
output image.
Scanner 3 Check if the original glass,
mirrors or lens is dirty.
Parameter 4 Check the image processing
adjustment parameters.
value
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Fig.8-12
Check item
Perform the enforced
performing of image quality
closed-loop control (05-2742)
and then automatic gamma
adjustment.
Output the test patterns and
check them.
Color: using 04-231 for each
color
Black: using 04-113
Laser array breakage detection
pattern: print it out at the code
04-286.
Clean it.
Adjust the color balance (color).
Adjust the image density.
8 - 299
Check image density.
Check color reproduction.
Measures
e-STUDIO5540C/6540C/6550C/5560C/6560C/6570C
ERROR CODE and TROUBLESHOOTING
8
Remarks
See step
5 if defect
occurs.