Minolta Di620 Troubleshooting Manual page 90

Section Step
4 Is the paper guide shorted to the frame?
Is the Image Transfer Corona installed prop-
5
erly?
6 Is the Image Transfer Corona wire dirty?
Engine
7 Is the Lower Fusing Roller scratched or
deformed?
8 Is the grid mesh installed in position?
1 Select "Tech. Rep. Mode," "Function," and
"Image Memory," in that order. Does "NG"
appear when "Input Image" is then run?
2 Select "Tech. Rep. Mode," "Function," and
Memory
"Image Memory," in that order. Does "NG"
appear when "I.R.
run?
1155SBT050309A
9) Smear on Back
Section Step
1 Are the Suction Belts dirty?
2 Is the Image Transfer Corona dirty?
3 Is the Pre-Image Transfer Guide Plate dirty?
4 Is the Fusing Unit Entrance Guide Plate
Engine
dirty?
5 Are the Upper and Lower Fusing Rollers
dirty?
6 Has toner spilled from the Developing Unit?
Check Item Result
→ ← → ←
Mem. Prn" is then
Check Item Result
T-85
Action
NO Close the circuit properly.
NO Install the corona properly.
YES Clean or change the Image
Transfer Corona.
YES Change the Lower Fusing
Roller.
NO Install the grid mesh prop-
erly.
YES Change PWB-B.
YES Change PWB-B.
Action
YES Clean them and check the
Developing Unit.
YES Clean it and check the
Developing Unit.
YES Clean it and check the
Developing Unit.
YES Clean it and check the
Developing Unit.
YES Clean or change the Upper
and Lower Fusing Roll-
ers. Check the Fusing
Roller cleaning mecha-
nism.
YES Change the Developing
Unit.