e-STUDIO5540C/6540C/6550C/5560C/6560C/6570C
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ERROR CODE and TROUBLESHOOTING
8 - 302
If the trouble is not solved at the step 2 and the step 3 or followings (excluding the parameter
adjustment) are performed, make sure to perform “Image quality closed-loop control” and then
“Automatic gamma adjustment” after taking a measure.
Parameter
adjustment
value
5
Check the image processing
parameters.
Check the value of offsetting
adjustment for background
processing (color), background
adjustment (black) and
background peak adjustment
for range correction (black).
6
Adjust the image processing
parameters.
While checking the above
encircled image, adjust the
reproduction level by the
offsetting adjustment for
background processing (color),
background adjustment (black)
and background peak
adjustment for range correction
(black).
Cover
7
Is the cover installed properly?
(Is the drum exposed to the
external light?)
Correct it.
Auto-toner
8
Is the auto-toner sensor
normal?
Check the operation of auto-
toner sensor and readjust.
9
Is the toner supply operating
constantly?
Check the motor and circuits.
Main charger
output
10
Is the main charger output
normal?
Check the circuits.
Developer bias 11
Is the developer bias proper?
Check the circuits.
Developer unit
12
Is the contact between the drum
and developer material proper?
Check the doctor-to-sleeve gap
and pole position.
Developer
material/Toner/
Drum
13
Using the specified developer
material, toner and drum?
Use the specified developer
material, toner and drum.
14
Have the developer material
and drum reached their PM life?
Replace the developer material
and drum.
15
Is the storage environment of
the toner cartridge 35oC or less
without dew?
Use the toner cartridge stored
in the environment within
specification.
Drum cleaning
blade
16
Is the drum cleaned properly?
Check the drum cleaning blade
pressure.
Transfer belt
cleaning blade
17
Is the transfer belt cleaning
blade in proper contact with the
transfer belt?
Take off the transfer belt and
check if the transfer belt
cleaning blade pressure spring
and pressure hook are installed
properly.
Toner dusting
18
Is the toner accumulated on the
seals of the developer unit?
Remove the toner and clean
the seals.
Cause/Section
Step
Check item
Measures
Remarks