Trn7391C Audio Interface Board Schematic Diagram (Sheet 1 Of 2) - Motorola ASTRO Spectra Instruction Manual

A+ SWB+
MOB_RX
A+ J2 11
A+ J11 1
J1 30
IGN
5V
J2 15
IGN
SWB+ J1 43
C124
SWB+ J1 18
1uF
SWB+ J2 12
SWB+ J2 14
C146 C147
470pF 0.1uF
DET_AUD J1 17
300mVrms
R119
TP95
100K
6
EN
TP51
12
TP26
X0
14
X
13 11
X1 A
2
Y0
15
Y
1 10
Y1 B
C157
5
5V
1uF
Z0
4
Z
3
9
Z1 C
U106
MC14053B
C138 VR104
470pF
10V
SPKR_LO J1 22
SPKR_H I J1 24
RSSI J1 29
RSSI
J1 4 TP145
SPKR_LO J1 47
SPKR_H I J1 49
J1 1
PTT*
J1 26 TP143
PTT*
9
R238
8
HUB* J2 19 U103
10
0
TP58 TP29 TP31 MC74HC00A
J2 28
HUB1
J1 20
CHAN_ACT*
J1 50
EMER
AUX_RX_AUD J1 13
J1 15
AUX_TX_AU D
J1 11
FILT_AUD
VSENSE1 J2 1
VSENSE2 J2 4
V03 J2 17
VI 3 J2 18
VI 1 J2 20
J2 21
VO1
J2 22
V02
RESET J2 16
J2 13
BUSY1
BUS+1 J2 9
BUS- J2 10
BUS-
J1 27
BUS+ J1 34
TP35 TP43 TP57
BUSY J1 45
RESET J1 37
TP32 TP56
J1 33
V02
J1 31
VO1
J1 36
FILT_AUD
AUX_TX_AU D J1 40
11
AUX_RX_AUD J1 38 TP119
8
9.6V
TP146 TP121
TP82
TP60
TP122
TP96 90mVrms
MIC_LO J1 21
J1 46 C101
MIC_LO R101
J2 26
MIC_LO
10K
4.7uF
JU101
0
TP113
TP4
RAD_MIC J1 48
90mVrms
C135
J1 23
RAD_MIC R109
J1 35
DIG_GND
BUS_SHLD J1 41 J14 A 100K
1uF
J1 10
DIG_GND TP3 TP11
J2 5
ANA_GND
J2 8 C145
AND_GND J14 B
MOB_RX
470pF
TP9
FLT_AUD_SHD J1 28
C136
J1 44
ANA_GND
4.8V
J1 19
ANA_GND J14 C
R115
1uF
160K

TRN7391C Audio Interface Board Schematic Diagram (Sheet 1 of 2)

68
R102
18K
5V
TP23
TP25
R128
3
+
11
R144
1
47K U107 Q101
+ TP17
_
2
10K
MC3303
4
R126
47K C140 9.6V
470pF
C144
470pF
R142
R145
47K
10K
R143 C143
43K 470pF
5V
5V
5V 5V
R140
10K
R116 R131
R114
10K
10K
10K
TP18
5
6
TP21
U103
4
MC74HC00A
1
TP19
3 12
U103
2
U103
MC74HC00A
13
4.8V
R120
TP61
MC3303
200K R125
TP59
11 + 3
200K
4.8V 4.8VDC 1
U101
+ _
2 TP79
MC3303
TP77
9.6V 4
C113
22pF
+ 10
U101 C107
R110 R117 R124
+
_ 9
4
47K
200K 200K
.015uF
4.8V
DNP
TP78
R122
R106
200K
R112
100K
TP118
TP83
100K
C104 C108
R210
100K
220pF .015uF
C112
R108
100K
1uF
TP101
9.6V C154
R241 VR107
470pF
10K 5.6V
_
13 4 TP102
9.6V
TP10
+
14
U101
R213 1K
12
+
MC3303
11
CONTROL HEAD
MICROPHONE BIAS
2.2V
2.2V
TP94 TP103 C111
ELC RECEIVE AUDIO
330pF
10
+ 11
LEVEL ADJUST R113 R118
8 12 +
U102 +
_
9
MC3303 84.5K 84.5K
4 13
C103 9.6V TP92
R111
39pF C110
200K
1000pF
C100
ADJUST TO 1.0 Vrms R121
0.33uF
AT ELC RECEIVE OUTPUT
TP93
R188 4.7K
10
5V
TP16
R187
TP14
47K
R186
Q102
10K A J15
C149
J15 TP27
B
470pF
J15
C
11
MC74HC00A
C118
.015uF
TP108 TP110
R127
1K
C117
.015uF
C116
R211
.015uF
10 C127 C128
R214 R215
18K 100K
0.1uF 0.1uF
9.6V
R123
TP80 TP81
560
_
6 4
4.8V
400mVrms
+
7
U101
5 9.6V
+
R212
11
MC3303
560
C158
VU AUDIO BUFFER
C126
0.1uF
10uF
9.6V
C139
0.1uF
11 TP91
14 2.0 VDC 3
U102 + 11
+
_
1
Q104 R139 R141
U102
MC3303 _ +
4 2 1.2K 1.8K
MC3303
9.6V 4
9.6V
R135
TP90
4.7K
TP105
A+
C121
R138
39pF
75
1
2
TP1
3
4
5
R129
6
R137
TP89
TP87
75 7
47K
8
R132
TP104
9.6V
47K
_
4
6 TP151
2.2V
+
7 2.6 VDC
U102
C120
Q103
5 +
11
39pF
TP86
R134
11.6 VDC
MC3303
TP88 4.7K
R236
10K
R237
R220
10K
SWB+
CR104
U105
TP38
_
2 4 MC33074A
+ R219
1
3
+
10K
11
R216 R217
TP34
1.2K 120
TP37
R130 R218
VR101
1K 100K
6.8V
TP36
TP13
11.6 VDC
1
TP106
S101 SWB+
SWITCH
16
15
14
13
12
11
10
9
TP150
2
3
4
5
6
7
8
9
1.8K
10
11
12
13
14
15
16
17
18
19
20
21
22
23
5V
Q106
R149
10 TP44
R221
1K
24
25
26
27
28
29
30
MAEPF-27901-O
6881086C22-B