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53
Troubleshooting
Description, Specifications, Installation, and Operation Manual
Federal Signal
www.fedsig.com
4. Remove the battery bracket and then remove the battery.
5. Reassemble in the reverse order of these steps.
Troubleshooting
Table 32 Troubleshooting
Problem
Action
No Radio Decode
• Unit is not programmed to recognize that particular code
sequence or signal is not being received properly.
• Verify programming is correct. Check the received audio signal
quality at the RX test pin on the front of the control
card
.
Low output from
speaker array
Check battery voltage. Also check signal indicators on amplifiers
during a function. If indicators are off, remove amplifier for service.
Function stops
before normal
timeout
Batteries may require further charging. Check battery voltage under
load. Check charger output.
Local PA feeds back Lower PA volume using knob above MIC connector.
Local PA has little or
no output
Hold microphone close to mouth. Increase PA volume using knob
above MIC connector
.
Batteries not holding
charge
Check that the battery fuse is intact and check charger output.
Load test batteries.
Relay outputs do not
operate
With a voltmeter, check that there is at least 12 Vdc across TP16
and TP18.
Radio PA takes too
long to timeout
Check radio for proper operation of squelch.
CD LED should light while carrier is present
Replacement Parts
The UVRI-B has the following replacement parts.
Table 33 Replacement Part Numbers
Description
Part Number
Control Board
Q20000253
Amplifier Board, 100 W
Q20000324
F1
148142A, 20 Ampere auto fuse
Littlefuse
287020
Bussman # GDC-5A
148186-02, 5 Ampere fuse
Battery, 12V, 12 Ah
Q155193A
Radio
19901665-XX
Microphone
MNC-MC
Ambient noise level monitoring Microphone X-SM1-FS1
UVRI-B Power Cable, 24 Vdc
Q17501999A
Service Part Fuse 2 per unit
Bussman part – GDC-5A
Littlefuse part p 218005.HXP
Not Available through Federal Signal