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