Blank Copy; Black Copy - Minolta Di450 Service Manual

(1)

Blank copy

Section Step
1 Developing Unit is installed in
position.
2 There is drive to the Develop-
ing Unit.
3 Image Transfer Corona wire is
installed properly.
Engine 4 Wiring between HV and Image
Transfer Corona is connected.
5 Dust-proof shutter is in correct
position.
6 Wiring between PH Unit and
Image Processing Board is
connected.
1 Scanner shading position is
IR
correct.
(2)

Black copy

Section Step
1 PC Drum Charge Corona is
installed correctly.
2 Wiring between HV and PC
Drum Charge Corona is con-
nected.
3 PC Drum is properly
grounded.
Engine
4 Developing bias contact is
dirty or deformed.
5 Wiring between HV and devel-
oping bias is connected.
6 Wiring between PH Unit and
Master Board is connected.
1 Exposure Lamp is ON.
2 CCD Assy is correctly
installed.
IR
3 Wiring between CCD Assy
and Image Processing Board
is connected.
Check Result
NO
NO
NO
YES Change HV.
NO
NO
YES Change PH Unit.
NO
Check Result
NO
NO
NO
YES Clean or change developing
YES Change HV.
NO
YES Change PH Unit. Change
NO
NO
YES Change CCD Assy.
NO
T-73
Action
Install correctly.
Correct or change drive cou-
pling.
Install properly.
Connect.
Correct.
Change Image Processing
Board.
Correct IR shading position.
(See ADJUSTMENT.)
Action
Install correctly.
Connect.
Clean or change PC Drum
ground plate.
bias contact.
Connect.
Master Board.
Change Exposure Lamp.
Correct installed position.
(See DISASSEMBLY.)
Change Image Processing
Board.
Connect.