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Removing the microphone
1. For front panel connections, squeeze the rubber strain
relief near the front panel to disengage the slot, and slide
the strain relief back along the microphone cord.
2. Squeeze the plastic tab on the microphone plug towards
the plug to unlock it while gently pulling the plug
outwards. If the plug does not come out easily, the tab
has not released correctly and should be squeezed again.
DC POWER CONNECTION
The TX3500S is designed for 13.8 volt DC, negative earth
installations only (i.e. where the negative terminal of the
battery is connected to the chassis or frame of the vehicle).
There are two recommended methods of installation.
Radio remains ON when the ignition switch is OFF
Connect the radio's negative (black) lead to the vehicle's
chassis, or if preferred, directly to the battery's negative
terminal. The radio's positive (red) lead should be connected
via the 2 amp fuse to the battery's positive terminal.
Alternatively, the positive lead could be connected into
the fuse box at a point that has +13.8 volts continuously
available (on the battery side of the ignition switch) via the
2 amp fuse.
Radio remains ON when ignition switch is OFF
RED
To Radio
BLACK
Chassis
Radio turns ON and OFF with ignition switch
RED
Fuse
To Radio
BLACK
PA G E 2 0
Chassis
Ingnition Switch
Car battery
Ingnition Switch
Car battery
Radio turns ON and OFF with the ignition switch
Radio remains ON when ignition switch is OFF
Connect the radio's negative (black) lead to the vehicle's
chassis, or if preferred, directly to the battery's negative
RED
terminal. The radio's positive (red) lead should connect to an
To Radio
accessory point in the vehicle's fuse box via the 2 amp fuse.
BLACK
This point should supply +13.8 volts only when the ignition
switch is turned ON or in the ACCESSORY position via the
2 amp fuse.
Radio turns ON and OFF with ignition switch
RED
To Radio
BLACK
HIGH VOLTAGE WARNING
The TX3500S has a built-in, high voltage detection system
to warn you if an over-voltage situation occurs. If the power
supply voltage exceeds 18 volts DC, the channel display will
flash 'hi dc' for 5 seconds when the unit is first turned on, or
at the time the voltage exceeds 18 volts. In addition, when
transmitting, the TX indicator will flash and the transmitter
will select low output power.
If the over-voltage warning appears you should switch your
TX3500S OFF and disconnect it from the power source,
before locating the cause of the trouble.
Once the High Voltage warning has been triggered, and you
have fixed the source of the problem, you will need to switch
the TX3500S OFF then ON again to reset it.
The power source must not exceed 30 volts.
I N S T R U C T I O N M A N U A L
Chassis
Car battery
Fuse
Chassis
Car battery
Ingnition Switch
Ingnition Switch
T X 3 5 0 0 S
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