Minolta DI450, Service Manual, Page: 267 / 271

T-76
(8) Blank streaks or bands
(9) Void areas
Section Step Check Result Action
Engine
1 PC Drum is scratchy and dirty. YES Clean or change.
2 PC Drum Paper Separator
Fingers are dirty or deformed. YES Clean of change.
3 PC Drum is properly
grounded. NO Clean or change PC Drum
ground plate.
4 Image Transfer Corona wire is
dirty. YES Clean or change.
5 Comb Electrode and grid
mesh are dirty. YES Clean or change.
6 Upper Fusing Roller is
scratchy or dirty. YES Clean or change.
7 Fusing Paper Separator Fin-
gers are scratchy or dirty. YES Change.
8 DB is plugged with caked
toner and foreign matter. YES Remove foreign matter.
Change developer.
9 PH Unit window is dirty. YES Clean.
IR
1 Mirror is dirty. YES Clean.
2 Shading sheet is dirty. YES Clean.
3 Scanner shading position is
correct. YES Correct IR shading position.
(See ADJUSTMENT.)
Section Step Check Result Action
Engine
1 Image Transfer Corona is
installed properly. NO Install correctly.
2 Image Transfer Corona wire is
installed correctly. NO Install correctly.
3 Upper Fusing Roller is
scratchy or dirty. YES Change.
4 Toner is even on Sleeve/Mag-
net Roller. NO Adjust DB. (See ADJUST-
MENT.) Correct developer
conveying mechanism.
5 DB is plugged with caked
toner and foreign matter. YES Remove foreign matter.
Change developer.