Foggy Background - Minolta Di200 Service Manual

FrameMaker Ver.5.5(PC) Di200/Di251/Di351 TROUBLESHOOTING
01.01.17
(4)

Foggy Background

When engine is faulty.
Section Step
1 Sunlight or any other extraneous light
—
enters the copier.
1 PC Drum is dirty.
2 Comb Electrode contact terminal is
dirty or deformed.
3 Grid voltage contact terminal is dirty or
deformed.
4 Charge Neutralizing Sheet contact ter-
minal is dirty or deformed.
5 Erase Lamp is dirty.
6 Erase Lamp is conducting.
Engine
7 Select functions in the following order:
Tech. Rep. Mode → Tech. Rep. Choice
→ Printer. The image problem is cor-
rected when the "Image Density" value
is changed toward the minus side.
8 Select functions in the following order:
Tech. Rep. Mode → Tech. Rep. Choice
→ Printer. The image problem is cor-
rected when the "VG Adjust" value is
changed toward the minus side.
1 Mirror, lens, and/or Original Glass are
dirty.
2 Exposure Lamp is dirty or deteriorated.
3 CCD2 Board and MFB2 Board are
IR
connected properly.
4 MFB2 Board and Master Board are
connected properly.
<Typical Faulty Images>
When IR is faulty.
4011T519AA 4011T538AA
Check Result
YES Protect the copier from
YES Clean.
YES Clean or change.
YES Clean or change.
YES Clean or change.
YES Clean.
NO
YES Make setting again.
YES Make setting again.
NO
YES Clean.
YES Clean or change.
NO
YES Change CCD Unit.
NO
T-51
Action
extraneous light.
Change Erase Lamp.
Change I/C.
Change PH Assy.
Change High Voltage
Unit.
Change Master Board.
Correct.
Change MFB2 Board.
Correct.