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Two-Way Radio
GP328
Motorola GP328 Detailed Service Manual
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Circuit
Board/Schematic
Diagrams
and
Parts
List
6A
-27
S502
2
3
5
4
C357
C358
C359
C383
C390
C346
R344
C343
C339
C340
C341
C342
C345
C334
M301
SH322
13
25
37
1
U301
C347
C348
C356
C337
C329
C336
C344
C360
C355
C361
C382
L314
L331
R343
R350
C327
C330
C326
C338
L330
Q302
R315
R313
R311
R312
M101
3
2
1
B501
U248
C277
C279
C522
C523
C278
L505
VR441
VR442
VR506
SH202
L261
C204
C234
13
25
37
1
U201
C201
C223
C231
C219
C232
C293
R201
R202
R231
R232
R233
C264
C298
C202
C263
C218
C206
C207
C208
C265
CR203
R204
R281
C296
C258
C259
U210
34
U211
3
4
C224
1
2
S501
C
8
C
4
Q301
C309
C315
C321
C395
C313
C307
C310
C314
C318
C380
C306
C311
C316
C317
C312
CR304
CR305
CR303
L340
L306
L307
L303
L305
L304
R306
R307
R304
R303
R347
R305
R340
R328
SH302
1
J101
4
3
2
J102
P100
M100
Q111
3
4
CR160
CR103
C108
R101
R170
C132
C173
C172
CR105
H101
R133
R172
C105
C130
C138
C151
C170
C174
C126
C133
C128
C135
C150
C152
C134
L112
R109
R132
R136
25
9
17
U102
1
R102
C123
E101
R130
R131
VR439
CR306
R329
SH304
C503
CR501
F501
CR241
C241
C246
C281
C295
C372
C242
C243
C250
C244
C245
C371
C373
C378
CR242
CR243
R349
L241
L281
L242
Q310
R330
R332
R110
R112
R111
R242
R241
R244
R245
R331
SH242
U241
10
20
1
11
C255
C252
C254
CR251
L251
R251
R252
R254
M400
CR411
C431
C434
C435
C433
C436
C437
3
FL401
Q416
R463
R462
R419
R414
R415
R420
R426
R460
R461
SH402
51
76
U410
U409
26
1
C449
C453
C456
C458
C459
C463
C466
C524
C525
C526
C527
C528
C529
E400
E401
E402
E403
E404
E405
E406
L410
L411
R409
R411
R457
R432
M300
SH403
M401
C405
C408
C409
C411
C414
C450
C451
C415
C410
C430
C476
C440
C452
Q410
3
4
R436
R471
R434
13
1
U404
U420
10
1
VR460
25
37
20
11
R498
C422
C420
C419
C407
C416
C421
C447
C448
C479
C481
C475
R400
R413
R475
R499
R423
R425
R424
R431
R445
R449
R472
C445
C442
R473
VR432
VR433
VR445
VR446
VR448
ZMY0130182-B
UHF
(403-470MHz)
Main
Board
B
ottom
Side
PCB
No.
8480450Z
13
88
90
Table of Contents
Default Chapter
2
Computer Software Copyrights
2
Safety and General Information
5
Approved Accessories
6
Blasting Caps and Areas
7
Operational Cautions
7
Operational Warnings
7
Potentially Explosive Atmospheres
7
Table of Contents
9
Section 1 Introduction
17
Scope of Manual
17
Warranty and Service Support
17
Warranty Period
17
After Warranty Period
17
Piece Parts
18
Technical Support
18
Service Aids
19
Recommended Test Tools
19
Power up Self-Test
21
Error Codes
21
Controller Information
23
Overview
23
Radio Power Distribution
23
Controller Board
24
General
24
Digital Architecture
25
Controller Schematics (330-400Mhz for 8485726Z01, 403-470Mhz for 8480450Z03 & 450-527Mhz for 8485641Z02)
27
Complete Controller Schematic Diagram
27
Controller ASFIC/ON_OFF Schematic Diagram
28
Controller Micro Processor Schematic Diagram
29
Controller Audio Power Amplifier Schematic Diagram
31
Controller Schematics (330-400Mhz for 8485726Z04, 403-470Mhz for 8480450Z13 & 450-527Mhz for 8485641Z06)
33
Controller ASFIC/ON_OFF Schematic Diagram
34
Controller Micro Processor Schematic Diagram
35
Controller Audio Power Amplifier Schematic Diagram
37
Controller Interface Schematic Diagram
38
Controller Schematics (136-174Mhz for 8486062B09 & 8486062B12)
39
Controller ASFIC/ON_OFF Schematic Diagram
40
Controller Micro Processor Schematic Diagram
41
Controller Audio Power Amplifier Schematic Diagram
43
Controller Schematics (136-174Mhz) for PCB 8486062B16
45
Controller ASFIC/ON_OFF Schematic Diagram
46
Controller Micro Processor Schematic Diagram
47
Controller Memory Schematic Diagram
48
Controller Audio Power Amplifier Schematic Diagram
49
Controller Interface Schematic Diagram
50
Controller Schematics
51
Controller Hierarchical Diagram
51
Complete Controller Schematic Diagram
52
Controller ASFIC/ON_OFF Schematic Diagram
53
Controller Microprocessor Schematic Diagram
54
Controller Interface and Memory Schematic Diagram
55
Controller Audio Power Amplifier Schematic Diagram
56
Keypad Board Information
57
Theory of Operation
57
Troubleshooting Chart
58
Parts List (Keypad Basic)
59
Keypad Board and Schematic Diagram
61
Keypad Board Top and Bottom View (PCB No. 8480574Z05)
61
Keypad Board Schematic Diagram
62
Section 6A
63
Model Chart and Test Specifications (403-470 Mhz)
63
Model Chart
63
Specifications
65
Transmitter
65
General
65
Transmitter
66
Receiver
68
Receiver Front-End
68
Receiver Back-End
69
Automatic Gain Control Circuit
70
Frequency Generation Circuitry
71
Synthesizer
72
VCO - Voltage Controlled Oscillator
73
Notes for All Schematics and Circuit Boards
75
Circuit Board/Schematic Diagrams and Parts List
77
UHF (403-470Mhz) Main Board Top Side PCB No. 8480450Z03
77
UHF (403-470Mhz) Main Board Bottom Side PCB No. 8480450Z03
78
UHF Controls and Switches Schematic Diagram
79
UHF Receiver Front End Schematic Diagram
80
UHF Receiver Back End Schematic Diagram
81
UHF Synthesizer Schematic Diagram
82
UHF Voltage Controlled Oscillator Schematic Diagram
83
UHF Transmitter Schematic Diagram
84
UHF Radio Parts List
85
Circuit Board/Schematic Diagrams and Parts List
88
UHF (403-470Mhz) Main Board Top Side PCB No. 8480450Z13
88
UHF (403-470Mhz) Main Board Bottom Side PCB No. 8480450Z13
89
UHF Controls and Switches Schematic Diagram
90
UHF Receiver Front End Schematic Diagram
91
UHF Receiver Back End Schematic Diagram
92
UHF Synthesizer Schematic Diagram
93
UHF Voltage Controlled Oscillator Schematic Diagram
94
UHF Harmonic Filter Schematic Diagram
95
UHF Transmitter Schematic Diagram
96
UHF Radio Parts List
97
Troubleshooting Charts
101
Troubleshooting Flow Chart for Controller
101
Troubleshooting Flow Chart for Receiver (Sheet 1
102
Troubleshooting Flow Chart for Receiver (Sheet 2
103
Troubleshooting Flow Chart for Transmitter
104
Troubleshooting Flow Chart for Synthesizer
105
Troubleshooting Flow Chart for VCO
106
Section 6B
107
Model Chart and Test Specifications (136-174 Mhz)
107
Model Chart
107
Specifications
109
Transmitter
109
General
109
Transmitter
110
Receiver
112
Receiver Front-End
112
Receiver Back-End
113
Automatic Gain Control Circuit
114
Frequency Generation Circuitry
115
Synthesizer
116
VCO - Voltage Controlled Oscillator
117
Notes for All Schematics and Circuit Boards
119
Circuit Board/Schematic Diagrams and Parts List
121
VHF (136-174Mhz) Main Board Top Side PCB No. 8486062B09
121
VHF (136-174Mhz) Main Board Bottom Side PCB No. 8486062B09
122
VHF (136-174Mhz) Main Board Top Side PCB No. 8486062B12
123
VHF (136-174Mhz) Main Board Bottom Side PCB No. 8486062B12
124
VHF Controls and Switches Schematic Diagram
125
VHF Receiver Front End Schematic Diagram
126
VHF Receiver Back End Schematic Diagram
127
VHF Synthesizer Schematic Diagram
128
VHF Voltage Controlled Oscillator Schematic Diagram
129
VHF Transmitter Schematic Diagram
130
VHF Radio Parts List
131
Circuit Board/Schematic Diagrams and Parts List
135
VHF (136-174Mhz) Main Board Top Side PCB No. 8486062B16
135
VHF (136-174Mhz) Main Board Bottom Side PCB No. 8486062B16
136
VHF Controls and Switches Schematic Diagram
137
VHF Receiver Front End Schematic Diagram
138
VHF Receiver Back End Schematic Diagram
139
VHF Synthesizer Schematic Diagram
140
VHF Voltage Controlled Oscillator Schematic Diagram
141
VHF Transmitter Schematic Diagram
142
VHF Radio Parts List
143
Troubleshooting Charts
147
Troubleshooting Flow Chart for Controller
147
Troubleshooting Flow Chart for Receiver (Sheet 1
148
Troubleshooting Flow Chart for Receiver (Sheet 2
149
Troubleshooting Flow Chart for Transmitter
150
Troubleshooting Flow Chart for Synthesizer
151
Troubleshooting Flow Chart for VCO
152
Section 6C
153
Model Chart and Test Specifications (450-527 Mhz)
153
Model Chart
153
Specifications
154
Transmitter
155
General
155
Receiver
157
Receiver Front-End
157
Receiver Back-End
158
Automatic Gain Control Circuit
159
Frequency Generation Circuitry
160
Synthesizer
161
VCO - Voltage Controlled Oscillator
162
Notes for All Schematics and Circuit Boards
164
Circuit Board/Schematic Diagrams and Parts List
165
UHF Band 2 (450-527Mhz) Main Board Top Side PCB No. 8485641Z02
165
UHF Band 2 (450-527Mhz) Main Board Bottom Side PCB No. 8485641Z02
166
UHF Band 2 Controls and Switches Schematic Diagram
167
UHF Band 2 Receiver Front End Schematic Diagram
168
UHF Band 2 Receiver Back End Schematic Diagram
169
UHF Band 2 Synthesizer Schematic Diagram
170
UHF Band 2 Voltage Controlled Oscillator Schematic Diagram
171
UHF Band 2 Transmitter Schematic Diagram
172
UHF Band 2 Radio Parts List
173
Circuit Board/Schematic Diagrams and Parts List
176
Circuit Board/Schematic Diagrams and Parts List
177
UHF Band 2 (450-527Mhz) Main Board Bottom Side PCB No. 8485641Z06
178
UHF Band 2 Controls and Switches Schematic Diagram
179
UHF Band 2 Receiver Front End Schematic Diagram
180
UHF Band 2 Receiver Back End Schematic Diagram
181
UHF Band 2 Synthesizer Schematic Diagram
182
UHF Band 2 Voltage Controlled Oscillator Schematic Diagram
183
UHF Band 2 Transmitter Schematic Diagram
184
UHF Band 2 Radio Parts List
185
Troubleshooting Charts
189
Troubleshooting Flow Chart for Receiver (Sheet 1 of 2)
190
Troubleshooting Flow Chart for Receiver (Sheet 2 of 2)
191
Troubleshooting Flow Chart for Transmitter
192
Troubleshooting Flow Chart for Synthesizer
193
Troubleshooting Flow Chart for VCO
194
Power Amplifier
197
Troubleshooting Flow Chart for Controller
231
Model Charts
237
Specifications
239
Transmitter
240
Temperature Cut Back Circuit
241
Receiver
242
Receiver Back-End
243
Frequency Generation Circuitry
244
Synthesizer
245
VCO - Voltage Controlled Oscillator
246
Notes for All Schematics and Circuit Boards
247
Circuit Board/Schematic Diagrams and Parts List
249
Lowband 29-42/35-50Mhz Main Board Bottom Side PCB No. 8486291A02
250
Lowband 29-42/35-50Mhz Controls and Switches Schematic Diagram
251
Lowband 29-42/35-50Mhz Overall Receiver Schematic Diagram
252
Lowband 29-42/35-50Mhz Receiver Front End Schematic Diagram
253
Lowband 29-42/35-50Mhz Receiver Back End Schematic Diagram
254
Lowband 29-42/35-50Mhz Synthesizer Schematic Diagram
255
Lowband 29-42/35-50Mhz Voltage Controlled Oscillator Schematic Diagram
256
Lowband 29-42/35-50Mhz Transmitter Schematic Diagram
257
Lowband 29-42/35-50Mhz Radio Parts List
258
Troubleshooting Charts
261
Troubleshooting Flow Chart for Receiver (Sheet 1 of 2)
262
Troubleshooting Flow Chart for Receiver (Sheet 2 of 2)
263
Troubleshooting Flow Chart for Transmitter
264
Troubleshooting Flow Chart for Synthesizer
265
Troubleshooting Flow Chart for VCO
266
Section 7 Flex Layout/Schematic Diagrams and Parts Lists
267
Keypad-Controller Interconnect Flex
267
Parts List for Keypad-Controller Interconnect Flex
268
Schematic for Universal Connector Flex
269
Other manuals for Motorola GP328
User Manual
30 pages
Operation Guide
1 page
Quick Reference Card
23 pages
Specifications
4 pages
Specification
2 pages
4
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Motorola GP328 Specifications
General
Brand
Motorola
Model
GP328
Category
Two-Way Radio
Language
English
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