3-38
Theory of Operation
: Controller
3.2.6
User Interface
3.2.6.1 Top Control
The Top Control contains an ON/OFF switch and a programmable push button. The Top Control
also includes a TX/RX LED that is solid amber upon receive, red on PTT, and blinks amber on
secure RX and Bluetooth LED. The Top Control components are mounted on flex which connects to
the Main board connector J1 and J2.
When the On/Off switch is pushed to ON (green), the switch is grounded and Mech_Sw is pulled low.
Mech_Sw is an input to MAKO (U6501). The logic low input enables an external FET (Q6501) gate
voltage, FET_ENX, which switches to SW_B+ and turns the radio on.
The programmable Top Button is by default used for Bluetooth on/off. It is also biased to
1.875 V (R6507) and is an input (EMERG_BTN_X) to the CPLD and MAKO. A button press is
detected when EMERG_BTN_X is pulled low.
Figure 3-30. Control Top Block Diagram
CPLD
Programmable
Top Switch
ON/OFF Switch
MAKO
TX/RX LED
BT LED
Intelligent
Lighting
TOP CONTROL
Main Board
Summary of Contents for Astro APX 3000
Page 1: ...APXTM TWO WAY RADIOS APX 3000 DETAILED SERVICE MANUAL ...
Page 2: ......
Page 4: ...Notes ...
Page 6: ...vi Document History Notes ...
Page 10: ...x Table of Contents Notes ...
Page 12: ...xii List of Tables Notes ...
Page 18: ...xviii List of Figures Notes ...
Page 22: ...xxii CommercialWarranty Notes ...
Page 46: ...3 20 Theory of Operation Main Board Notes ...
Page 84: ...3 58 Theory of Operation Bluetooth Notes ...
Page 208: ...6 64 Troubleshooting Waveforms LF CW on Spectrum Analyzer Notes ...
Page 222: ...7 14 Troubleshooting Tables List of Board and IC Signals Notes ...
Page 282: ...8 60 Schematics Boards Overlays and Parts Lists Main Board Block UHF1 84012513001_A Notes ...
Page 390: ...8 168 Schematics Boards Overlays and Parts Lists Main Board Block VHF 84012512001_A Notes ...
Page 456: ...9 8 Debugging Fixture Powering up Covert Board Notes ...
Page 468: ...Glossary 10 Glossary Notes ...
Page 472: ...Index 4 Index Notes ...
Page 473: ......