NCR 7156, Руководство по эксплуатации и устранению неисправностей

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Chapter 2: Troubleshooting 5
Chapter 2: Troubleshooting
This chapter outlines the causes and solutions for the most common
MICR problems you may encounter. If you have checked the setup of
the MICR according to the information in the preceding chapter and
are still experiencing a problem, use this chapter to help you identify
and correct the problem.
This chapter covers only MICR-related problems. For all other issues,
see the 7156 Owner’s Guide or the 7156 Service Guide.
Harness conversion kit:
There is a harness extension kit for dual-
board printers if the repair results in the control board replacement
with a version that contains an integrated MICR amplifier. In this
situation, remove and discard the separate MICR amplifier and its
interface harness; use the harness extensions for the read head and the
buck coil to facilitate connection to the new control board if you wish
to leave the original read head and buck coil installed.
Incorrect Document Feed
One or more of the following occurs when a document is inserted:
•
Nothing happens when document is inserted.
•
The document does not feed all the way into the printer.
•
The document feeds into the printer too far (past the feed rollers).
•
The document is still being pinched by the rolls after the read
phase.
Document feed depends on a correctly setup printer and is controlled
by two optical slip-in sensors. Both sensors are located near the slip
guide wall, one in front of the feed rollers and the other behind the
feed rollers, to the left of the MICR read head. These sensors detect the
lead and trailing edge of the document during insertion and feeding.