Konica Minolta PagePro 1390 MF - Manual (Page 137)

T-27
(4) Image reading system: Black streaks or bands
<Typical Faulty Image>
<Troubleshooting Procedure>
Step Check Result Action
1 Is the document damaged or dirty? YES Replace the document.
2 Is the Original Pad dirty? YES Clean it.
3 Does the Original Cover lie flat? NO If the Document Cover is
deformed or the hinges are dam-
aged, replace the Document
Cover.
4 Is the surface of the Original Glass dirty? YES Clean it.
5 Is the Shading Sheet or back surface of
the Original Glass dirty? YES Clean them.
6 Is the mirror or lens dirty? YES Clean them.
Replace the Scanner Unit.
7 Is the Exposure Lamp dirty? YES Clean it.
Replace the Scanner Unit.
8 Are there any bent connector pins on the
cables connecting the control boards,
are any connectors incorrectly plugged
in, or are any cables broken? YES Correctly plug in the connectors.
Replace the connection cables.
4011T017AA 4011T023AA