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RADIUS GM300
Service manual
Table Of Contents - Motorola GM300 Service Manual
146-174 mhz 449-470 mhz
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Also See for GM300
:
Service manual
(49 pages)
,
Operating instructions manual
(19 pages)
,
Operating instructions
(2 pages)
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Table Of Contents
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Contents
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Table of Contents
Contents
2
Circuit Board Diagrams & Schematics
2
Models Table
3
Accessories
5
Performance Specifications
7
Optional Signalling Features With Rapidcall Package
7
Radio Disassembly/Re-Assembly
8
To Remove Control Head & Chassis Covers
8
To Remove The P.a. Heatsink
8
To Remove The Rf Circuit Boards
8
To Remove The Logic Circuit Board
9
To Remove The P.a. Circuit Board
9
To Re-Assemble The Radio
9
Fasteners, Tools And Torques
10
Programming
11
Error Tones
11
Board Replacement & Calibration
11
Recommended Test Equipment
11
Vhf Receiver Front End, 146-174 Mhz
12
Uhf Receiver Front End, 449-470 Mhz
12
Frequency Synthesizer
13
Receiver Back End
13
Receiver Ic Block Diagram
14
Synthesizer Section Block Diagram
15
Vco's and Buffers
16
Charge Pump
16
Loop Filter
16
Reference Oscillator
16
Logic Board
17
Dc Distribution And Regulation
17
Microcomputer Start-Up Routine
18
Microcomputer Operation (Expanded Logic)
18
Reading Or Writing In Memory (Expanded Logic)
18
Programmable I/O's
18
Receiver Audio Circuitry
19
Voice Path
19
Data Path
19
Transmitter Audio Circuitry
20
Voice/Data Path
20
Transmitter Power Control Circuitry
20
Control Line Functions
20
Rf Power Amplifier
21
10-25 Watt Vhf Power Amplifier
21
10-25 Watt Uhf Power Amplifier
21
Front Panel Boards
21
Display Board
22
Vol/Mic Board
22
Front Panel Filter Board
22
Jumper-Selectable Options
23
Schematic Diagrams For Hld8029A And Hld8031A Vhf Rf Boards
27
Component Side
28
Solder Side
29
Schematic Diagrams For Hle8030A And Hle8032A Uhf Rf Boards
33
Schematic Diagrams For Hln8074A Logic Board (2-Layer)
38
Schematic Diagrams For Hln8070A Logic Board (4-Layer)
43
Mates With J7 On Logic Brd
51
Circuit Board Details
53
Voltage Regulators
61
Circuit Board Detail, Schematic And Parts List For Hln8075A Display Board
62
Switchboard (Shown From Component Side)
67
Circuit Board Detail, Schematic And Parts List For Hln8071A Volume/Mic. Board
69
Parts List
70
Exploded View, Schematic, Circuit Board Detail And Parts List For Microphone
70
Shown From Component Side
71
Microphone Board
73
Exploded Mechanical View And Parts List Gm300 Mobile Radio
76
Hld8029A Rf Board, Mhz, 12.5 Khz (N)
77
Hld8031A Rf Board, Mhz, 25 Khz (W)
77
Hle8030A Rf Board, 449-470 Mhz, 12.5 Khz (N)
80
Hle8032A Rf Board, 449-470 Mhz, 25 Khz (W)
80
Hln8074A Logic Board 2-Layer Masked
83
Hln8070A Logic Board 4-Layer Expanded
86
Hld8033A Pa Board, 146-174 Mhz,10-25 Watt
90
01-80704Y64 Feedthru Bracket And Cable Assembly
91
Hle8034A Pa Board, 449-470 Mhz, 10-25 Watt
92
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