Background Fogging 1 - Toshiba e-STUDIO 2555C Service Manual

8.5.4

Background fogging 1

Cause/Section Step
Density 1
reproduction
Printer section 2
Scanner 3
Parameter 4
adjustment
value
5
Cover 6
Auto-toner 7
8
© 2012-2013 TOSHIBA TEC CORPORATION All rights reserved
Fig.8-8
Check item
Check the gradation
reproduction.
Check the printer output
image.
Check if the original glass,
mirrors or lens is dirty.
Check the image processing
parameters.
Adjust the image processing
parameters.
Is the cover installed properly?
(Is the drum exposed to the
external light?)
Is the auto-toner sensor
normal?
Is the toner supply operating
constantly?
8 - 283
Measures
Perform the forced performing of
image quality closed-loop control
(05-2742) and then automatic
gamma adjustment.
Output the test patterns and
check them.
Using 04-36 for each color
Clean it.
Check the value of offsetting
adjustment for background
adjustment.
While checking the above
encircled image, adjust the
reproduction level by the
offsetting adjustment for
background adjustment.
Correct it.
Check the operation of auto-
toner sensor and readjust.
Check the motor and circuits.
e-STUDIO2555C/3055C/3555C/4555C/5055C
ERROR CODE AND TROUBLESHOOTING
8
Remark
s
See
step 6 if
defects
occur.