Technical data

Series SPB Audio Boosters Manual, Revision A
8-1
8 Troubleshooting
8.1 Introduction
WARNING: Some electronic components store a high voltage
charge, even though power is not connected, and can cause a
dangerous shock if touched. Do not touch exposed circuitry on the
Series SPB Audio Booster panel unless the circuitry has discharged
for one hour and a safe discharge procedure is used.
CAUTION: Make sure that only qualified personnel in accordance with the
procedures in this manual conduct troubleshooting and servicing. Do not attempt
to make other adjustments, modifications, or repairs. Never use water, steam,
cleaning liquids or sprays on the panel.
CAUTION: User servicing of the panel is limited to field-wiring changes, PC
board replacement, and following the instructions in the Installation chapter
(Chapter 4) and troubleshooting procedures in this chapter.
• After any troubleshooting procedure is completed, perform a complete system checkout
as described in section 4.6.
8.2 Troubleshooting
The panel monitors system integrity. Items monitored for integrity are:
Visual appliance circuit field wiring (SPB-80/4)
Audio appliance circuit field wiring
Input voltage AC (120VAC, 50-60 Hz), Backup Battery (24VDC)
Battery voltage level
Battery circuit field wiring
Amplifier functionality
Battery Charge Voltage
System status is indicated to the operator via the audio supervision circuits on the voice
evacuation panel, and the AC and TROUBLE LED indicators and the Trouble Form “C” relay
contacts on the Series SPB Audio Booster. If a trouble condition is detected, the voice evacuation
panel indicates a “short” condition on the audio or visual output circuit.