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Chapter 8: Troubleshooting
This chapter discusses the troubleshooting a user may perform to
diagnose problems which may occur during use of the NCR 7870. For
more comprehensive repair and service information, refer to the NCR
7870 Scanner/Scale Repair Guide (D2-0966-A).
Fault Identification
The NCR 7870 Scanner/Scale performs internal diagnostic checks upon
various functions during operation and the power-up sequence.
Scanner operational problems are signaled by
•
a series of tones,
•
Voice Messages (if available), and
•
Status Indicator light flashing.
Scale operational problems are signaled by an error code displayed on
the NCR 7825 Remote Display or the integrated display. Like the
scanner, the scale unit performs diagnostic checks during the power-up
sequence and while in operation.
Troubleshooting consists of troubleshooting charts that are designed
for locating and correcting certain problems without the aid of a
trained technician. If the problem cannot be corrected by using these
charts, a trained technician can then use the on-board diagnostics to
help identify a faulty component.