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Professional GP680
Motorola Professional GP680 User Manual
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Pr
of
essional Radio
GP Series
Detailed Service Manual
6866558D04-O
2
Table of Contents
Table of Contents
15
Default Chapter
5
Safety Information
5
Rf Exposure Compliance and Control Guidelines and Operating Instructions
6
Medical Devices
8
Blasting Caps and Areas
9
Operational Cautions
9
Operational Warnings
9
Potentially Explosive Atmospheres
9
Intrinsically Safe Radio Information
10
Chapter 1 MODEL CHART and TECHNICAL SPECIFICATIONS
17
GP340 Model Chart
17
GP640 / GP680 Model Chart
17
Technical Specifications
18
Chapter 2 THEORY of OPERATION
21
Introduction
21
Transmitter
21
Power Amplifier
21
Antenna Matching Network
22
Antenna Switch
22
Harmonic Filter
22
Power Control Integrated Circuit (PCIC)
22
Receiver
23
Receiver Front-End
23
Receiver Back-End
24
Automatic Gain Control Circuit
25
Frequency Generation Circuitry
26
Synthesizer
26
Voltage Controlled Oscillator (VCO)
28
Chapter 3 TROUBLESHOOTING CHARTS
31
Troubleshooting Flow Chart for Receiver (Sheet 1 of 2)
31
Troubleshooting Flow Chart for Receiver (Sheet 2 of 2)
32
Troubleshooting Flow Chart for Transmitter
33
Troubleshooting Flow Chart for Synthesizer
34
Troubleshooting Flow Chart for VCO
35
Pcb/Schematics/Parts Lists
37
Chapter 4 PCB/SCHEMATICS/PARTS LISTS
39
PCB 8485726Z01 - Schematics
39
Pcb : 8485726Z01
39
PCB 8485726Z01 - Parts List
47
PCB 8485726Z04 - Schematics
50
Pcb : 8485726Z04
50
PCB 8485726Z04 - Parts List
58
Table of Contents
63
Chapter 1 INTRODUCTION
65
Scope of Manual
65
Warranty and Service Support
65
After Warranty Period
65
Warranty Period and Return Instructions
65
European Radio Support Centre (ERSC)
66
Piece Parts
66
Related Documents
67
Technical Support
67
Radio Model Information
68
Chapter 2 MAINTENANCE
69
Introduction
69
Preventive Maintenance
69
Cleaning
69
Inspection
69
Safe Handling of CMOS and LDMOS
70
General Repair Procedures and Techniques
70
Notes for All Schematics and Circuit Boards
73
Chapter 3 SERVICE AIDS
75
Recommended Test Tools
75
Recommended Test Equipment
77
Table of Contents
81
Keypad and Flexible Connectors
83
Keypad
83
Flexible Connectors
83
Troubleshooting Chart
84
Allocation of Schematics and Circuit Boards
85
Flexible Connectors
85
Keypad Pcbs
85
Pcb/Schematic Diagrams and Parts List: Flexes
87
Keypad - Controller Flex
87
Universal Connector Flex
88
Pcb/Schematic Diagrams and Parts List: Keypad
89
PCB 8480574Z06 - Diagram
89
PCB 8480574Z06 - Parts List
91
PCB 8480682Z04 - Diagrams
92
PCB 8480682Z04 - Parts List
94
Table of Contents
97
Overview
99
Radio Power Distribution
99
Controller Circuits
100
Controller Architecture
100
MCU Digital Architecture
100
Real Time Clock
101
Modb/Vstby Supply
102
Audio/Signaling Architecture
102
300R1 Controller
103
VHF Controller (for Models with PCB 8486473Z04)
105
Lowband Controller
106
Allocation of Schematics and Circuit Boards
107
Controller - Set 1 (PCB 8486062B12/B14, 8485726Z01)
111
Controller - Set 2 (PCB 8486101B09/B10)
117
Controller - Set 3 (PCB 8485658Z01)
123
Controller - Set 4 (PCB 8486062B16/17, 8486101B11)
129
Controller - Set 5 (PCB 8485726Z04)
135
Controller - Set 6 (PCB 8486473Z04)
141
Table of Contents
149
Chapter 1 MODEL CHART and TECHNICAL SPECIFICATIONS
151
GP320/GP340/GP360/GP380 Model Chart
151
GP140 Model Chart
152
GP640/GP680 Model Chart
152
GP1280 Model Chart
153
GP240/GP280/GP540/GP580 Model Chart
154
Technical Specifications
155
Chapter 2 THEORY of OPERATION
157
Introduction
157
VHF Transmitter
157
Power Amplifier
157
Antenna Matching Network
158
Antenna Switch
158
Harmonic Filter
158
Power Control Integrated Circuit (PCIC)
158
VHF Receiver (for All Models Except those with PCB8486473Z04)
159
Receiver Front-End
159
Receiver Back End
160
Receiver Back-End
160
Automatic Gain Control (AGC)
161
Receiver Front-End
162
Receiver Back End
163
Receiver Back-End
163
Automatic Gain Control (AGC)
164
Frequency Generation Circuit
164
Synthesizer
165
Voltage Controlled Oscillator
166
Voltage Controlled Oscillator (VCO)
166
Voice Storage (GP1280)
168
Chapter 3 TROUBLESHOOTING CHARTS
171
Troubleshooting Flow Chart for Receiver for All Models Except those with PCB 8486473Z04
172
Troubleshooting Flow Chart for Receiver for Models with PCB 8486473Z04
174
Troubleshooting Flow Chart for Transmitter
175
Troubleshooting Flow Chart for Synthesizer
176
Troubleshooting Flow Chart for VCO
177
Troubleshooting Flow Chart for Receive Message/Personal Memo Recording
178
Troubleshooting Flow Chart for Message Playback
179
Controls and Switches
181
Receiver Front End
181
Synthesizer
181
Allocation of Schematics and Circuit Boards
181
Voice Storage Facility
181
Controls and Switches
182
Receiver Front End
182
Transmitter
182
VHF PCB 8486062B12 / Schematics
185
VHF PCB 8486062B12 Parts List
193
VHF PCB 8486101B09 / Schematics (GP1280)
197
VHF PCB 8086101B09 Parts List (GP1280)
201
Vhf Pcb 8486062B14
205
VHF PCB 8486062B14 Parts List
207
Vhf Pcb 8486101B10
211
VHF PCB 8486101B10 Parts List (GP1280)
213
Vhf Pcb 8486062B16
217
11.0 VHF PCB 8486062B16 Parts List
225
13.0 Vhf Pcb 8486062B17
231
Vhf Pcb 8486101B11
235
15.0 VHF PCB 8486101B11 Parts List
237
Vhf Pcb 8486473Z04
241
Table of Contents
257
Chapter 1 MODEL CHART and TECHNICAL SPECIFICATIONS
259
GP340/GP380 Model Chart
259
Technical Specifications
260
Chapter 2 THEORY of OPERATION
263
Lowband Transmitter
263
Power Amplifier (PA)
263
Antenna Matching Network
264
Antenna Switch
264
Harmonic Filter
264
Power Control Integrated Circuit (PCIC)
264
Temperature Cut Back Circuit
264
Lowband Receiver
265
Receiver Front-End
265
Automatic Gain Control (AGC)
266
Receiver Back-End
266
Frequency Generation Circuit
267
Synthesizer
268
Buffer
269
Diplexer and Output Filters
269
Prescalar Feedback
269
Receive VCO
269
Transmit VCO
269
Chapter 3 TROUBLESHOOTING CHARTS
271
Receiver (Sheet 1 of 2)
271
Receiver (Sheet 2 of 2)
272
Transmitter
273
Synthesizer
274
Voltage Controlled Oscillator
275
Main Board Bottom Side
277
Main Board Top Side
277
Parts List
277
Allocation of Schematics and Circuit Boards
277
Controller Circuits
277
PCB 8485658Z03 - Schematics
279
PCB 8485658Z03 - Parts List
288
4
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Motorola Professional GP680 Specifications
General
Brand
Motorola
Model
Professional GP680
Category
Two-Way Radio
Language
English
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