Pub. 42004-790B
SP2 Fiber Class I Div. 2 Handset/Speaker Amplifier Station
Page 20 of 24
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Maintenance
Troubleshooting
The following table provides aid for qualified service personnel in troubleshooting problems with an SP2
station.
Problem
Solution
station not functional
•
check wiring and cable terminations
•
check power supply voltage at
TB3
on termination PCBA
•
P
WR
LED on main PCBA not illuminated
•
H
EARTBEAT
LED blinking once per second for normal
operation
network communication not
functional
•
verify
LNK
LED on main PCBA is off
•
verify
SPD
LED on main PCBA is off
•
verify IP connection settings using telnet
•
ping the station’s IP address from an admin PC
•
verify network switch settings for IGMP snooping and
multicast filtering
handset receiver audio too
high/low
•
adjust the receiver volume
•
check potentiometer
R37
setting
•
check handset connections
•
check cable terminations between the termination and main
PCBAs
•
check hookswitch operation
•
replace handset
speaker volume too high/low
•
adjust the speaker and 600-ohm audio output volume
•
check potentiometer
R36
setting
•
P2
and
P3
termination PCBA jumper positions incorrect
(see Figure 5)
•
check speaker wiring at terminal block
TB1
•
replace the speaker or driver
RTU output not functional
•
verify no monitored output faults exist
•
check fuse
F1
on the termination PCBA
•
check connected device operation
RTU input not functional
•
verify no monitored input faults exist
•
check the RTU Inputs at terminal block
TB2
•
check connected device operation
