T2004 Multi-Control Head System Manual Part B T2004 Control Heads 73
© Tait Electronics Ltd May 2004
6 Testing the X2AM01 radio interface
Test equipment
■ T2020 or T2040 radio with power supply in known working order.
■ X2H2x1 Primary control head in known working order.
■ Microphone, speaker and power supply for control head.
■ 8 way micromatch loom to connect X2AM01 to radio.
■ 8 way micromatch loom to connect primary head.
■ Radio communications test set.
■ Multimeter.
■ 20MHz oscilloscope, preferably digital storage.
■ Standard tools, screwdrivers, etc.
Setting up
7. Connect SK1 of the X2AM01 board to connector S9 of radio logic
board.
8. Connect SK3 of the X2AM01 board to connector J5 of the primary
control head.
9. Connect power and microphone to the primary control head as usual.
10. Connect the radio's antenna jack to the RF input/output of the
communication test set.
11. Connect a suitable 13.8VDC 10A power supply to the radio.
Test i ng
Power
■ Check there is always +13.8V on U2 pin 8.
■ Check U2 pin 3 is high when the control head switch (volume control)
is off, and around 0V when the control head is switched on.
■ Check there is 5V on U2 pin 1 when control head is on.
■ Check 1/2 VCC rail at TP1 is around 2-3V.
■ Check radio turns off (0V on radio logic board S14 pin 1) when control
head is off, check radio is on (+13.8V on S14 pin 1) when control head
is on.
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