Minolta Di620, Manual, Page: 296 / 466

T-81
1155SBT050302A
2) Black Copy
1155SBT050303A
3) Low Image Density
Section Step Check Item Result Action
Engine
1 Is the PC Drum properly grounded? NO Clean or change the PC
Drum ground plate.
2 Is the developing bias contact normal? NO Clean or change the devel-
oping bias contact.
3 Is the wiring between Image Transfer/Paper
Separator HV HV2 and the developing bias
normal? NO Correct the wiring.
4 Are the PJs and connectors plugged securely
into PWB-B and PWB-J? YES Change HV2 or PWB-J.
NO Plug them in securely.
Memory
1 Select “Tech. Rep. Mode,” “Function,” and
“Image Memory,” in that order. Does “NG”
appear when “Input Image” is then run? YES Change PWB-B.
2 Select “Tech. Rep. Mode,” “Function,” and
“Image Memory,” in that order. Does “NG”
appear when “I.R. Mem. Prn” is then
run?
YES Change PWB-B.
Section Step Check Item Result Action
Engine
1 Is the PC Drum properly grounded? NO Clean or change the PC
Drum ground plate.
2 Are the Comb Electrode and grid mesh nor-
mal? NO Check and change if nec-
essary.
3 Is the wiring between PC Drum Charge/
Developing Bias HV HV1 and PC Drum
Charge Corona normal? NO Correct the wiring.
4 Is the Image Transfer Corona dirty? YES Clean or change the Image
Transfer Corona.
5 Is the copy paper damp? YES Change the copy paper.
6 Are the Ds Rolls in contact with the PC
Drum? NO Reinstall the Developing
Unit.
7 Is the developing bias contact normal? NO Clean or change the devel-
oping bias contact.
8 Is the wiring between Image Transfer/Paper
Separator HV HV2 and the developing bias
normal? NO Correct the wiring.
9 Select “Tech. Rep. Mode,” and “Level History”
and check to see if the value for “ATDC Set”
is correct? NO Replenish the supply of
toner.
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