FrameMaker Ver.5.5E(PC) EP3000/EP3010 TROUBLESHOOTING
98.08.06
T-90
5. Black Streaks or Bands
6. Black Spots
Cause
Step
Check Item
Result
Action
Uneven charging
1
Are the PC Drum Charge
Corona wire and grid mesh
dirty?
YES
Clean or replace the PC Drum
Charge Corona.
Check the operation of the
toner charging mechanism.
Cleaning failure
2
Is the Cleaning Blade dirty with
foreign matter, paper dust,
etc., or is it scratched?
YES
Replace the Cleaning Blade.
3
Does the Cleaning Blade
make a correct lateral motion?
NO
Check the operation of the
Cleaning Blade.
PC Drum failure
4
Is the PC Drum surface dirty or
scratched?
YES
Replace the PC Drum. If nec-
essary, replace the Cleaning
Blade.
PC Drum Paper
Separator Fingers
5
Are the PC Drum Paper Sepa-
rator Fingers dirty, deformed or
faulty in operation?
YES
Clean or replace the PC Drum
Paper Separator Fingers.
Fusing failure
6
Is the Upper Fusing Roller
dirty or scratched?
YES
Clean or replace the Upper
Fusing Roller.
7
Are the Upper Paper Separa-
tor Fingers dirty or deformed?
YES
Clean or replace the Upper
Paper Separator Fingers.
Optical failure
8
Is the mirror or lens dirty with
foreign matter?
YES
Clean the mirror or lens.
Cause
Step
Check Item
Result
Action
PC Drum failure
1
Is the PC Drum surface
scratched or dirty with foreign
matter?
YES
Clean or replace the PC Drum.
If necessary, replace the
Cleaning Blade.
Fusing failure
2
Is the Upper Fusing Roller
dirty or scratched?
YES
Check the Fusing Thermistors.
Clean or replace the Upper
Fusing Roller.
Developing failure
3
Is the amount of toner on the
Sleeve Roller proper?
YES
Go to step 7
4
Is the toner-to-carrier ratio rel-
atively high?
YES
Change the toner-to-carrier
ratio.
5
Is the Db value normal?
NO
Make Db adjustment.
6
Is the Developer Scattering
Prevention Seal deformed or
dirty?
YES
Clean or replace the Devel-
oper Scattering Prevention
Seal.
Dirty PC Drum
Paper Separator
Fingers
7
Are the PC Drum Paper Sepa-
rator Fingers dirty or
deformed?
YES
Clean or replace the PC Drum
Paper Separator Fingers.