Black Streaks Or Bands; Black Spots - Minolta EPI 054 User Manual

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 TROUBLESHOOTING
98.05.15

(5) Black Streaks or Bands

Cause Step
Uneven charging Are the PC Drum Charge
Corona wire and grid mesh
1
dirty?
Cleaning failure Is the Cleaning Blade dirty
2 with foreign matter, paper
dust, etc., or is it scratched?
Does the Cleaning Blade
3
make a correct lateral motion?
PC Drum failure Is the PC Drum surface
4 dirty or scratched?
PC Drum Paper Are the PC Drum Paper Sepa-
Separator Fingers 5 rator Fingers dirty, deformed or
faulty in operation?
Fusing failure Is the Upper Fusing Roller
6
dirty or scratched?
Are the Upper Paper Separa-
7
tor Fingers dirty or deformed?
Optical failure Is the mirror or lens dirty
8
with foreign matter?

(6) Black Spots

Cause Step
PC Drum failure Is the PC Drum surface
1 scratched or dirty with for-
eign matter?
Fusing failure Is the Upper Fusing Roller
2 dirty or scratched?
Developing failure Is the amount of toner on
3
the Sleeve Roller proper?
Is the toner-to-carrier ratio
4
relatively high?
5 Is the Db value normal?
Is the Developer Scattering
6 Prevention Seal deformed
or dirty?
Dirty PC Drum Are the PC Drum Paper
Paper Separator 7 Separator Fingers dirty or
Fingers deformed?
Check Item Result
YES
YES
NO
YES
YES
YES
YES
YES
Check Item Result
YES
YES
YES
YES
NO
YES
YES
T-69
Action
Clean or replace the PC
Drum Charge Corona.
Check the operation of the
toner charging mechanism.
Replace the Cleaning
Blade.
Check the operation of the
Cleaning Blade.
Replace the PC Drum. If
necessary, replace the
Cleaning Blade.
Clean or replace the PC
Drum Paper Separator Fin-
gers.
Clean or replace the Upper
Fusing Roller.
Clean or replace the Upper
Paper Separator Fingers.
Clean the mirror or lens.
Action
Clean or replace the PC
Drum. If necessary, replace
the Cleaning Blade.
Check the Fusing Ther-
mistors. Clean or replace
the Upper Fusing Roller.
To step 7.
Change the toner-to-car-
rier ratio.
Make Db adjustment.
Clean or replace the Devel-
oper Scattering Prevention
Seal.
Clean or replace the PC
Drum Paper Separator Fin-
gers.