NCR 7800 - Fault Identification

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Fault Identification
The NCR 7800 Consumer Price Verifier uses tones and a
display to help identify problems. Diagnostic checks are made
during operation and power-up. The following table can help
isolate problems.
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Status LED shows
error
See diagnostics charts on next pages.
Error tones See diagnostics charts on next pages.
Bad reads Bad tag.
Unrecognizable bar code.
In Programming Mode.
Intermittent reads Loose connection.
RF interference.
Wrong laser output.
Only reads 1 tag RTS/CTS handshaking enabled and
host not connected.
Host doesn't recognize unit.
No host
communication
Wrong communication configuration.
Host not connected.
Wrong communication protocol.