Minolta Di620 Troubleshooting Manual page 85

1155SBT050301A
1) Blank Copy
Section Step
1 Is the PC Drum Charge Corona installed cor-
rectly?
2 Are the Comb Electrode and grid mesh nor-
mal?
3 Is the wiring between PC Drum Charge/
Developing Bias HV HV1 and PC Drum
Charge Corona normal?
4 Is the PC Unit in position?
5 Are the Ds Rolls in contact with the PC
Engine
Drum?
6 Is the drive transmission mechanism to the
Developing Unit in good condition?
7 Is the Image Transfer Corona wire installed
correctly?
8 Is the wiring between Image Transfer/Paper
Separator HV HV2 and Image Transfer
Corona normal?
9 Is the paper guide shorted to the frame?
1 Are the mirrors and lens installed properly?
IR
2 Are the mirrors and lens dirty?
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?
Check Item Result
→ ← → ←
Mem. Prn" is then
T-80
Action
NO Install correctly.
NO Check and change if nec-
essary.
NO Correct the wiring.
NO Reinstall the unit all the
way into the copier.
NO Reinstall the Developing
Unit.
NO Check and change any
defective part.
NO Install it properly.
NO Correct the wiring.
YES Change HV1 or HV2.
NO Close the circuit properly.
NO Reinstall.
YES Clean.
YES Change PWB-B.
YES Change PWB-B.