Motorola GP328 Detailed Service Manual

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Controller ASFIC/ON_OFF Schematic Diagram...................................................4-18
Controller Micro Processor Schematic Diagram...................................................4-19
Controller Memory Schematic Diagram................................................................4-20
Controller Audio Power Amplifier Schematic Diagram..........................................4-21
Controller Interface Schematic Diagram...............................................................4-22
3.6 Controller Schematics (136-174MHz) for PCB 8486062B16........................4-23
Complete Controller Schematic Diagram..............................................................4-23
Controller ASFIC/ON_OFF Schematic Diagram...................................................4-24
Controller Micro Processor Schematic Diagram...................................................4-25
Controller Memory Schematic Diagram................................................................4-26
Controller Audio Power Amplifier Schematic Diagram..........................................4-27
Controller Interface Schematic Diagram...............................................................4-28
3.7 Controller Schematics (29-42/35-50MHz) ....................................................4-29
Controller Hierarchical Diagram............................................................................4-29
Complete Controller Schematic Diagram..............................................................4-30
Controller ASFIC/ON_OFF Schematic Diagram...................................................4-31
Controller Microprocessor Schematic Diagram ...................................................4-32
Controller Interface and Memory Schematic Diagram..........................................4-33
Controller Audio Power Amplifier Schematic Diagram..........................................4-34
Section 5 Keypad Board Information
1.0 Theory of Operation .............................................................................................5-1
2.0 Troubleshooting Chart..........................................................................................5-2
3.0 Parts List (Keypad Basic).....................................................................................5-3
4.0 Keypad Board And Schematic Diagram...............................................................5-5
Keypad Board Top and Bottom View (PCB No. 8480574Z05)...............................5-5
Keypad Board Schematic Diagram.........................................................................5-6
Section 6A Model Chart and Test Specifications (403-470 Mhz)
1.0 Model Chart.......................................................................................................6A-1
2.0 Specifications....................................................................................................6A-3
3.0 Transmitter........................................................................................................6A-4
3.1 General........................................................................................................6A-4
4.0 Receiver............................................................................................................6A-6
4.1 Receiver Front-End......................................................................................6A-6
4.2 Receiver Back-End......................................................................................6A-7
4.3 Automatic Gain Control Circuit ....................................................................6A-8
5.0 Frequency Generation Circuitry ........................................................................6A-9
5.1 Synthesizer................................................................................................ 6A-10
5.2 VCO - Voltage Controlled Oscillator .......................................................... 6A-11
6.0 Notes For All Schematics and Circuit Boards ................................................. 6A-13
7.0 Circuit Board/Schematic Diagrams and Parts List .......................................... 6A-15
UHF (403-470MHz) Main Board Top Side PCB No. 8480450Z03..................... 6A-15
UHF (403-470MHz) Main Board Bottom Side PCB No. 8480450Z03 ...............6A-16

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)