36 TMAA01-05 Options-Extender Board TM8000 Mobile Radio Accessories Manual
March 2004 © Tait Electronics Limited
3.1.1 Power Supply Line
The power supply output available on pin 2 of the external options
connector is factory-set to 13.8V. The output on this pin can be changed to
5V if R11 (a 0Ω surface mount resistor) is moved to position R10.
Figure 3.1 at the top of the page shows the component locations.
Important The maximum current for the 5V supply line is 400mA.
3.1.2 RX_BEEP_IN Line
If the RX_BEEP_IN line is required on the external options connector,
it must replace one of the following lines:
■ IOP_RSSI
■ AUD_TAP_IN
■ AUX_MIC_AUD
■ AUD_TAP_OUT.
The following table explains the resistor link changes required and
Figure 3.1 at the top of the page shows the component locations.
Figure 3.1 Options-extender board linking resistor locations
power supply line
RX_BEEP_IN line
Table 3.1 RX_BEEP_IN resistor changes
RX_BEEP_IN Line Replaces Remove Resistor Add Resistor
IOP_RSSI R2 R3
AUD_TAP_IN R4 R5
AUX_MIC_AUD R6 R7
AUD_TAP_OUT R8 R9
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