Motorola GP328 Detailed Service Manual

ix
UHF Band 2 Transmitter Schematic Diagram................................................... 6C-20
UHF Band 2 Radio Parts List ............................................................................ 6C-21
8.0 Circuit Board/Schematic Diagrams and Parts List.......................................... 6C-25
UHF Band 2 (450-527MHz) Main Board Top Side PCB No. 8485641Z06........ 6C-25
UHF Band 2 (450-527MHz) Main Board Bottom Side PCB No. 8485641Z06 .. 6C-26
UHF Band 2 Controls And Switches Schematic Diagram................................. 6C-27
UHF Band 2 Receiver Front End Schematic Diagram ...................................... 6C-28
UHF Band 2 Receiver Back End Schematic Diagram....................................... 6C-29
UHF Band 2 Synthesizer Schematic Diagram .................................................. 6C-30
UHF Band 2 Voltage Controlled Oscillator Schematic Diagram........................ 6C-31
UHF Band 2 Transmitter Schematic Diagram................................................... 6C-32
UHF Band 2 Radio Parts List ............................................................................ 6C-33
9.0 Troubleshooting charts................................................................................... 6C-37
Troubleshooting Flow Chart for Controller ........................................................ 6C-37
Troubleshooting Flow Chart for Receiver (Sheet 1 of 2)................................... 6C-38
Troubleshooting Flow Chart for Receiver (Sheet 2 of 2)................................... 6C-39
Troubleshooting Flow Chart for Transmitter...................................................... 6C-40
Troubleshooting Flow Chart for Synthesizer ..................................................... 6C-41
Troubleshooting Flow Chart for VCO ................................................................ 6C-42
Section 6D Model Chart and Test Specifications (330-400 Mhz)
1.0 Model Chart...................................................................................................... 6D-1
2.0 Specifications.................................................................................................... 6D-2
3.0 Transmitter........................................................................................................ 6D-3
3.1 General........................................................................................................ 6D-3
4.0 Receiver............................................................................................................ 6D-5
4.1 Receiver Front-End..................................................................................... 6D-5
4.2 Receiver Back-End...................................................................................... 6D-6
4.3 Automatic Gain Control Circuit.................................................................... 6D-7
5.0 Frequency Generation Circuitry........................................................................ 6D-8
5.1 Synthesizer.................................................................................................. 6D-9
5.2 VCO - Voltage Controlled Oscillator.......................................................... 6D-10
6.0 Notes For All Schematics and Circuit Boards................................................. 6D-12
7.0 Circuit Board/Schematic Diagrams and Parts List.......................................... 6D-13
330-400MHz Main Board Top Side PCB No. 8485726Z01............................... 6D-13
330-400MHz Main Board Bottom Side PCB No. 8485726Z01.......................... 6D-14
330-400MHz Controls And Switches Schematic Diagram ................................ 6D-15
330-400MHz Receiver Front End Schematic Diagram ..................................... 6D-16
330-400MHz Receiver Back End Schematic Diagram...................................... 6D-17
330-400MHz Synthesizer Schematic Diagram.................................................. 6D-18
330-400MHz Voltage Controlled Oscillator Schematic Diagram....................... 6D-19
330-400MHz Transmitter Schematic Diagram .................................................. 6D-20
330-400MHz Radio Parts List ........................................................................... 6D-21

Motorola GP328 Specifications

General

Channel Capacity	16 channels
Operating Temperature	-30°C to +60°C
Sealing	IP54
Frequency Range	136-174 MHz (VHF), 403-470 MHz (UHF)
Power Output	1-5W (VHF), 1-4W (UHF)
Dimensions	137 x 57.5 x 37.5 mm
Power Supply	7.5V
Battery Life	8 hours (High Power), 11 hours (Low Power) with standard NiMH battery
Weight	420g (with standard battery)