Chapter 7: Service and troubleshooting
184 EST3X Technical Reference Manual
Possible cause
o All Call page audio
the network
amplifiers or the low level
page output terminals
• The paging microphone is defective
• The page inhibit timer setting in the 3-SDU is too long
• The EAEC card is defective
• The ribbon cable between 3X-PMI audio interface card and
EAEC card is loose or defective
• The amplifier is defective
• Output modules connected to the amplifier are not activating
through programming
All Call page audio
the network
ers but output is
available at the low level page
output terminals
• A short or open is detected on the digital audio data riser or
there is incorrect wiring
• A short or open is detected on the network data riser from
incorrect wiring
• The connection to TB5 on the CPU is loose or incorrectly
wired
• The 3X-PMI is incorrectly defined in the 3-SDU
• The amplifiers are not properly installed or they are defective
• Output modules connected to the amplifier are not activating
through programming
• The amplifier channel is incorrectly programmed
• The operator is speaking too loud into the microphone
• The amplifier gain is set too high
uxiliary input volume
• The AUX input/output gain control on the EAEC needs
adjusting
• A short or open is detected on the AUX input wiring
uxiliary input volume
• The AUX input/output gain control on the EAEC needs
adjusting
• The amplifier output gain is set too high
Recorded messages are not
working prope
rly
• The audio database was not correctly downloaded
• An incorrect message label was referenced
essages are going to wrong
• The amplifier and message labels,
and rules are incorrect or
mislabeled
remote microphone is in
state
• There is a w
rong or missing EOL resistor on the microphone
key input
• There is no supervisory tone on the DC current for the
remote microphone audio output
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