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Two-Way Radio
ASTRO Digital Spectra
Instruction manual
Trn7391C Audio Interface Board - Motorola ASTRO Spectra Instruction Manual
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Also See for ASTRO Spectra
:
Service manual
(248 pages)
,
Parts list
(13 pages)
,
Detailed service manual
(442 pages)
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
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VR109
C156
VR115
VR114
VR116
R153
R146
C153
C152
C151
49
J3
50
9
16
S101
1
8
R236
R166
R170
R175
R201
R160
R200
R180
R202
R237
R161
R174
R181
R156
R111
3
R169
R162
R182
R157
2
1
R165
R163
R158
R183
C142
R167
R195
R164
R168
R179
R197
R159
R171
C141
R137
R138
3
R240
Q103
4
R135
1
J13
1
C121
R141
R132
3
R139
C111
R129
R118
C110
R113
R121
C126
C139
C103
R213
R134
1
3
T100
8
7
6
5
4
14
1
VR107
TRN7391C Audio Interface Board
70
VR108
VR110
VR100
R148
R152
C155
J11
1
1
2
FRICTION LOCK
VR105
R176
R194
R198
R177
R184
R203
R178
R204
R185
R126
R205
R191
R189
R143
R128
C143
R172
R190
R192
C140
R144
7
1
U107
R173
R199
R193
8
14
R145
C144
Q101
R196
3
R186
4
Q104
Q102
1
R187
U106
R214
C127
J15
C157
C
B
A
C124
R215
C128
R212
R127
C117
R211
R119
C118
R124
JU101
R110
R125
C108
C107
R117
R210
R112
C113
R123
C116
R120
C104
R122
C120
R106
C101
8
7
C100
C158
R102
14
1
J14
R108
C135
A
C112
B
R109
C
C136
R115
2
R239
C125
1
2
C138
5
U100
6
VR104
1
R107
C102
C109
J1
C119
C115
3
2
U104
1
C114
49
50
8484502T05
REV H
J6
J4
J5
1
1
1
2
3
4
R238
C137
R147
R131
8
7
C122
1
2
CR102
R154
14
1
CR103
R151
R140
CR105
R116
C123
Q108
R114
VR102
Q107
R150
VR103
R222
J2
R227
R228
R232
R224
R229
R233
R226
R223
8
7
C160
14
1
Q106
R220
33
34
R216
R219
R217
R221
R149
VR101
CR104
MAEPF-27903-O
6881086C22-B
Table of
Contents
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Table of Contents
Troubleshooting
Maintenance and Troubleshooting Procedures
59
Diagrams and Parts Lists
73
Troubleshooting Charts
75
Power Problem Troubleshooting Chart
76
TRC Local TX Troubleshooting Chart
77
TRC RX Audio Troubleshooting Chart
78
Trunking Tones Not Heard at Remote Console Troubleshooting Chart
79
TRC Board DC Voltage Troubleshooting Chart
80
AIB TX Audio Troubleshooting Chart
81
AIB RX Audio Troubleshooting Chart
82
AIB DC Power Troubleshooting Chart
83
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