Filter
Top Products
e-STUDIO3511/4511 TROUBLESHOOTING 5 - 110 November 2003 © TOSHIBA TEC
Remarks
See step 6 if
defects occur.
Cause/Section
Density reproduction
Printer section
Scanner
Parameter
adjustment value
Cover
Auto-toner
Main charger output
Developer bias
Developer unit
Developer material/
Toner/Drum
Drum cleaning blade
Transfer belt cleaning
blade
Toner dusting
Step
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Check items
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?
Is the main charger output
normal?
Is the developer bias proper?
Is the contact between the drum
and developer material proper?
Using the specified developer
material, toner and drum?
Have the developer material and
drum reached their PM life?
Is the storage environment of the
toner cartridge 35
o
C or less
without dew?
Is the drum cleaned properly?
Is the transfer belt cleaning blade
contacted and released properly?
Is the transfer belt cleaning blade
in proper contact with the transfer
belt?
Is the toner accumulated on the
seals of the developer unit?
Measures
Perform the forced 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.
Check the value of offsetting
adjustment for background
processing (color) and back-
ground peak adjustment for
range correction (black).
While checking the above
encircled image, adjust the
reproduction level by the offset-
ting adjustment for background
processing (color) and back-
ground peak adjustment for
range correction (black).
Correct it.
Check the operation of auto-
toner sensor and readjust.
Check the motor and circuits.
Check the circuits.
Check the circuits.
Check the doctor-to-sleeve gap
and pole position.
Use the specified developer
material, toner and drum.
Replace the developer material
and drum.
Use the toner cartridge stored in
the environment within specifica-
tion.
Check the drum cleaning blade
pressure.
Check if the spring of the transfer
belt cleaner clutch is removed or
if any connector is disconnected.
Otherwise replace the clutch.
Check if the blade pressure
spring is installed.
Remove the toner and clean the
seals.
* 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.