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e-STUDIO281c/351c/451c TROUBLESHOOTING June 2005 © TOSHIBA TEC
5 - 100
* If the trouble is not solved at the step 1 and the step 2 or followings (excluding the parameter adjust-
ment) are performed, make sure to perform “Enforced performing of image quality closed-loop con-
trol” and then “Automatic gamma adjustment” after taking a measure.
Main charger
output
9 Is the main charger output normal? Check the circuits.
Developer bias 10 Is the developer bias proper? Check the circuits.
Developer unit 11 Is the contact between the drum
and developer material proper?
Check the doctor-to-sleeve gap
and pole position.
Developer mate-
rial/Toner/Drum
12 Using the specified developer
material, toner and drum?
Use the specified developer mate-
rial, toner and drum.
13 Have the developer material and
drum reached their PM life?
Replace the developer material and
drum.
14 Is the storage environment of the
toner cartridge 35oC or less without
dew?
Use the toner cartridge stored in
the environment within specifica-
tion.
Drum cleaning
blade
15 Is the drum cleaned properly? Check the drum cleaning blade
pressure.
Transfer belt
cleaning blade
16 Is the transfer belt cleaning blade
contacted and released properly?
Check if the spring of the transfer
belt cleaner clutch is removed or if
any connector is disconnected.
Otherwise replace the clutch.
17 Is the transfer belt cleaning blade in
proper contact with the transfer
belt?
Check if the blade pressure spring
is installed.
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 items Measures Remarks