Minolta EP2030 - Black Streaks or Bands; Black Spots

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 TROUBLESHOOTING
98.05.15
T-69
(5) Black Streaks or Bands
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
necessary, 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 Fin-
gers.
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.
(6) Black Spots
Cause
Step Check Item Result Action
PC Drum failure
1
Is the PC Drum surface
scratched or dirty with for-
eign 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 Ther-
mistors. Clean or replace
the Upper Fusing Roller.
Developing failure
3
Is the amount of toner on
the Sleeve Roller proper?
YES
To s tep 7.
4
Is the toner-to-carrier ratio
relatively high?
YES
Change the toner-to-car-
rier 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
Separator Fingers dirty or
deformed?
YES
Clean or replace the PC
Drum Paper Separator Fin-
gers.