Power Supply Unit; No Document Feeding - Oki OKIFAX4550 Maintenance Manual

7.17

Power Supply Unit

(A) Low-voltage Selection
Replace the Power Supply Unit when output voltage written on the item A3 in the Appendix
A is not normal.
(B) High-voltage Selection
T.B.D. (To be determined)
7.18

No Document Feeding

Note: This section places an emphasis on troubleshooting of mechanical portions.
Therefore, it is recommended to replace the MCNT Board first and, then if not solved,
follow this flow chart.
document(s) is curled?
Too thick document(s)?
Too many document(s)?
Coated document(s)?
Are there bits of paper or
adhesive tape on the
document transport route?
Replace the roller-ADF
assembly, sub-roller and/or
the separation rubber.
41309401TH Rev.4
Start
Load a document(s).
No
LCD works?
Yes
No
Control panel unit is
closed firmly?
Yes
Yes
Leading edge of
No
Yes
(>0.15 mm?)
No
Yes
(>20/A4?)
No
Yes
No
Yes
No
Checking Points:
Check PC1 and the scan motor.
Close the control panel unit.
Stretch it out or use the carrier
sheet.
Make a copy of the document by
using an office copy machine,
then transmit the copy.
Reduce the number of documents
on the feeder.
1. Make a copy of the document
by using an office copy machine,
then transmit the copy.
2. Use the carrier sheet.
Remove them, then clean the
surface of the scanning route.
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