3-2
Basic Theory of Operation
: Major Assemblies
3.1
Major Assemblies
The ASTRO APX 2000/ APX 4000 (Two Knobs) radio includes the following major assemblies
(
):
• Main Board –
Contains all transmit, receive, and frequency generation circuitry, including the
digital receiver back-end IC and the reference oscillator. The main board also contains a dual
core processor, which includes both the microcontroller unit (MCU) and a digital signal
processor (DSP) core, the processors's memory devices, an audio and power supply support
integrated circuit (IC), a digital support IC, external power amplifier as well as combination
Global Positioning System (GPS) and Bluetooth 2.1 IC and front end circuitry.
•
Keypad Board
– Contains a Type III secure IC, Bluetooth controller (AVR IC) and a 3-axes
digital accelerometer.
•
Control Top
– Contains a Multi-Function knob, a push button switch used for Emergency call
and a light bar. The control top also includes TX/RX LED that is solid amber upon receive, red
on PTT, and blinks amber on secure TX/RX.
•
Main Display
– 160 pixels x 90 pixels, transflective color LCD.
• Keypad
- Limited Keypad Version has 3 soft keys, 4 direction Navigation key, Home and Data buttons
- Full Keypad Version has 3 soft keys, 4 direction Navigation key, 3x4 alphanumeric keypad,
Home and Data buttons.
Figure 3-1. APX 2000/ APX 4000 (Two Knobs) Overall Block Diagram
Bluetooth
Antenna
Keypad Board
External Accessory
Connector
Front
Display
Control
Top
Main
Board
RF and GPS
Antenna
Summary of Contents for APX 4000
Page 1: ...APXTM TWO WAY RADIOS APX 1000 APX 2000 APX 4000 APX 4000Li BASIC SERVICE MANUAL ...
Page 6: ...Notes iv Commercial Warranty ...
Page 8: ...ii Notes ...
Page 16: ...x Portable Radio Model Numbering System Notes ...
Page 46: ...3 12 Basic Theory of Operation Controller Section Notes ...
Page 60: ...5 12 Performance Checks Transmitter Performance Checks Notes ...
Page 128: ...8 34 Disassembly Reassembly Procedures Ensuring Radio Submergibility Notes ...
Page 142: ...Index 4 Index Notes ...
Page 144: ...ii Notes ...
Page 150: ...viii List of Figures Notes ...
Page 152: ...x Portable Radio Model Numbering System Notes ...
Page 240: ...7 32 Disassembly Reassembly Procedures Ensuring Reliable Splash Protection Notes ...
Page 250: ...9 6 Exploded Views and Parts Lists APX 1000 Back Kit Exploded View Parts List Notes ...
Page 254: ...Index 4 Index Notes ...
Page 255: ...Title Page ASTRO APX 1000 Digital Portable Radios Section 3 900 MHz APX 1000 ...
Page 256: ......
Page 262: ...viii List of Figures Notes ...
Page 264: ...x Portable Radio Model Numbering System Notes ...
Page 278: ...3 8 Basic Theory of Operation Controller Section Notes ...
Page 336: ...7 32 Disassembly Reassembly Procedures Ensuring Reliable Splash Protection Notes ...
Page 346: ...9 6 Exploded Views and Parts Lists APX 1000 Back Kit Exploded View Parts List Notes ...
Page 350: ...Index 4 Index Notes ...
Page 352: ...ii Notes ...
Page 360: ...x Portable Radio Model Numbering System Notes ...
Page 400: ...5 12 Performance Checks Transmitter Performance Checks Notes ...
Page 428: ...6 28 Radio Alignment Procedures Performance Testing Notes ...
Page 434: ...7 6 Encryption Erase an Encryption Key Notes ...
Page 478: ...8 44 Disassembly Reassembly Procedures Ensuring Radio Submergibility Notes ...
Page 490: ...ii Notes ...
Page 492: ...A 2 Accessories Notes ...
Page 496: ...Notes B 4 EMEA Warranty Service and Technical Support Further Assistance From Motorola ...
Page 520: ...Glossary 12 Glossary Notes ...
Page 524: ...Index 4 Index Notes ...
Page 525: ......