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GAI-Tronics 6-Channel Radio
Pub.: 42004-325A
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Interface PCBA
The Interface PCBA provided as standard equipment maintains regulation per a wide range of input
voltages, and in addition to the internal protection, it is further protected from transients on the external
power source by the optional surge filter PCBA. The power supply provides regulated 12.5 V dc to the
radio circuits. It contains three jumper settings, which can be configured in accordance with the table
below.
Jumper Table
Jumper
Name
Function
Position
Default
(as shipped)
JU1
Receive Audio Level Select
Out = High level
In = Low level attenuated 15 dB
Out
JU2
Speaker Power Amp Enable
1-2 = Enabled by Carrier Detect
2-3 = Always enabled
1-2
JU3
Microphone Bias
In = Supply bias power to Mic
Out = No bias
In
Pot 1
Pot 1 is used to adjust the speaker level. Refer to Figure 4 on page 5 for the location of the pot. Refer to
the Installation section for instructions for speaker output adjustment.
Wide Range (110/220 V AC/270 V DC) Power Supply PCBA
This switch-mode power supply features high-efficiency operation over an 85 to 300 V ac or dc input
range. The output is adjustable to provide proper float charging voltage to the optional standby battery.
Pot 2
The power supply PCBA contains a pot adjustment, Pot 2. It is used to adjust the charging current into
the optional standby/emergency battery. Refer to Figure 4 on page 5 for the location of the pot. Refer to
Installation section for instructions for the charging current adjustment.
Surge Filter PCBA
This module provides additional power input filtering for noisy industrial 270 V dc power. It is standard
only on the TP4512SYN-6 and the TP4512SYN-6FR.
Optional Standby/Emergency Battery
Each radio model is designed to operate with a rechargable battery.
When installed, the standby/emergency battery supplies power for up to 15 minutes during maximum
power drain, and longer at the average power drain. The GAI-Tronics 40201-004 battery is sold
separately.
