Konica Minolta PagePro 1390 MF - Manual (Page 144)

T-34
(12) Printer system: Foggy background
<Typical Faulty Image>
<Troubleshooting Procedure>
(13) Printer system: Blank streaks or bands
<Typical Faulty Images>
<Troubleshooting Procedure>
Step Check Result Action
1 Is the PC Drum scratched? YES Replace the Drum Cartridge.
2 Is the developing bias contact terminal in
good contact with its mating part? NO Clean the contact terminal or
check the terminal position.
3 Is the PH window dirty? YES Clean it.
4 Is the problem eliminated after checks have
been made through step 3? NO Replace the High Voltage Unit
(HV1).
Replace the Controller/Image
Control Board (PWB-I).
Step Check Result Action
1 Is the Image Transfer Roller dented,
scratched, or dirty? YES Replace the Image Transfer
Roller.
2 Is PC Drum scratched or dirty? YES Replace the Drum Cartridge.
3 Is the Fusing Roller scratched or dirty? YES Replace the Fusing Unit
(Fusing Roller).
4 Is the PH window dirty? YES Clean it.
5 Is the problem eliminated after checks have
been made through step 4? NO Replace the Controller/Image
Control Board (PWB-I).
4011T004AA
4011T015AA 4011T020AA