RESPONDING TO ALARMS VX150 TO VX2 TROUBLESHOOTING MANUAL
PAGE 3.1.10 VERSION 2.0 2023-04-20
Analog Audio PWB +12V
Failure
The Analog Audio PWB +12V Meter measures
less than 6V for a period of at least 5 seconds.
The Analog Audio PWB +12V Meter measures
greater than 6V for at least 5 seconds.
The most likely failure is the connection
between the Exciter and Analog Audio
PWB or a component failure on the
Analog Audio PWB.
Check the connection between the
Exciter and Analog Audio PWB and
measure the voltage at TP2 on the
Analog Audio PWB.
Consider replacement of the Analog
Audio PWB. See
Analog Audio PWB
Replacement on page 3.1.40.
Analog Audio PWB Audio
Failure
The Exciter has failed to detect a valid Analog
Audio data stream and/or a valid MPX data
stream from the Analog Audio PWB.
The Exciter has detected valid Analog Audio
and MPX data streams from the Analog Audio
PWB.
The most likely failure is the connection
between the Exciter and Analog Audio
PWB or a component failure on the
Analog Audio PWB.
Check the connection between the
Exciter and Analog Audio PWB.
Consider replacement of the Analog
Audio PWB. See
Analog Audio PWB
Replacement on page 3.1.40.
Analog Audio PWB DC Voltage
Failure
Any of the following Analog Audio PWB
voltage meters meet the stated criteria for a
period of at least 5 seconds:
Analog Audio PWB +8V Meter measures
less than +4 V or greater than +12 V
Analog Audio PWB -8V Meter measures
greater than -4 V or less than –12 V
Analog Audio PWB +5V Meter measures
less than +2.5 V or greater than +7.5 V
All of the following Analog Audio PWB
voltage meters meet the stated criteria for a
period of at least 5 seconds:
Analog Audio PWB +8V Meter measures
between +4 V and +12 V
Analog Audio PWB -8V Meter measures
between -4 V and –12 V
Analog Audio PWB +5V Meter measures
between +2.5 V and +7.5 V
If the Analog Audio PWB +12V Failure
alarm is present, this is the most likely
cause, so refer to the troubleshooting for
that alarm.
The next most likely cause is a
component failure on the Analog Audio
PWB. Consider replacement of the
Analog Audio PWB. See
Analog Audio
PWB Replacement on page 3.1.40.
Alarm Name Trigger Conditions Clear Conditions Troubleshooting
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