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In the event of a suspected functional problem, use the troubleshooting
references provided in this section. This useful information will help you
to identify and resolve the cause of the problem.
The scanner/scale has a number of features that indicate when a scanner or
scale problem occurs. The unit may:
• emit a series of tones
• light the 7-segment (FRU status) display
• flash the Green and/or Yellow LEDs
• display error codes on the Remote Display (if installed)
Three error reporting modes are used: Power-Up Selftest, Operational
tests and Diagnostic tests. These test sequences are explained on the fol-
lowing pages.

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The Power-up Selftest is a pre-operational series of tests that must be suc-
cessfully completed before the scanner indicates readiness for operation.
This pre-operational period is the time between power-up and normal
operation during which the motor comes up-to-speed and software, fi rm-
ware and hardware are being tested. These tests ensure that all subsystems
are fully functional before turning on the Visible Laser Diode (VLD).
Refer to the Section 3 subsection titled, Operational Modes for a more
detailed description of this and other scanner and scale modes.

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These are the tests that run continually during Normal Operation and
Sleep Mode. Firmware checks all subsystems, accessor y connections and
the POS interface to verify everything is operating normally. If a problem
is detected at any time, a long, low tone is sounded, an error code is shown
on the 7-segment display, and operation may be halted. If you press the
Volume/Tone Push Button at that time, a series of tones will be sounded
that matches the error code displayed.