Table of Contents
Advertisement
C235
R249
R248
R233
P100
1
36k
120k
100k
VOTER AUDIO 25
C100
U108-19 (1)
U120A
1
470pF
2
2904
1
3
2
3
+
U115A
VOTER AUDIO
MUTE
C281
820pF
C236
C101
.001
.0022
U121A
R102
2
C103
R101
R247
2904
147k
1
.1
29.4k
54.9k
3
RX WB AUDIO 27
+
R103
69.8k
R281
C102
1M
.001
R104
C107
15k
.022
C105
C276
.033
+9V
.0022
C237
C279
U121B
.033
R293
SOURCE
.22
6
2904
R105 100
6.2k
7
+1.25
5
V
U122B
+
C106
6
2904
R294
.068
C294
1k
5
.1
+
R106
1.07M
HIGH-PASS FILTER > 30 kHz
C115
100pF
R113
150k
C113
C114
NOISE AMPLIFIER
U135A
100pF
100pF
C116
R277
R115
R234
MC33178
2
.001
5.1k
47k
100k
1
R114
3
+
U135B
18k
R116
C117
MC33178
6
1.5k
.01
7
5
+
R130
RECEIVE DATA FILTER
100k
C121
.01
DATA AMPLIFIER TP DCR
C123
U124B
R128
R129
R251
R235
U135A
.047
2904
6
100k
47k
R131
51k
100k
MC33178
2
7
56k
1
5
+
C122
3
+
R132
.022
2
C124
56k
R205
R206
.0068
3
7.5k
10k
-5V
+9V
U159C-10 (3)
DATA TO A-D GATE
-5V
+ C268
+ C207
+ C255
+ C267
C230
C186
C187
C188
C189
C190
47
47
47
1
.01
.01
.01
.01
.01
.01
R452
5253
R237
43k
390k
100k
U121B
C239
6
2904
68pF
7
5
+
C104
U122A
2
100pF
2904
1
3
+
C110
C280
.022
.022
C111
C278
R111
.0068
47k
18.2k
C238
C277
.047
C239
R110
.0047
.068
R108 110
110
U122C
U122D
C108
C109
9
13
2904
2904
.1
.1
7
8
14
2
10
12
+
+
3
+
R107
R109
1.07M
1.07M
NORMAL RX
U157-15 (1)
RX SQ ACT
U157-18 (1)
R214
3.9k
NOISE
R117
R122
RECTIFIER
6.2k
10k
U123A
R118
RT100
CR101
-5V
C118
3303
12k
10k
2
.01
1
3
+
R119
C120
6
47k
.1
5
R120
10k
R250
R135
150k
47k
U125A
3303
U125B
3303
1
5
+
CR108
7
+
6
+ C241
U125D
R134
R136
15
3303
12
100k
+
10k
14
13
-5V
+5V
U125C
CR110
R133
10
3303
100k
CR109
+
R213
7
5.1k
9
+ C242
15
R212
1k
-5V
C191
C192
C193
C194
C195
C196
C197
C198
C199
C200
.01
.01
.01
.01
.01
.01
.01
.01
.01
.01
U114D
LOCAL AUDIO
MUTE GATE
14
15
16
U108-18 (1)
LOCAL AUDIO
MUTE GATE
U115B
U153C
RX VOICE
REPEAT
GATE
GATE
11
10
6
7
U153A-2 (3)
9
8
U107-19 (1)
U108-15 (1)
RX VOICE
U114A
RX OPTION
C112
GATE
.01
3
2
1
R112
+5V
47k
RX OPTION
U113C
U108-16 (1)
U113B
R299
NORMAL
RX MUTE
U163A
8
10k
3303
RX GATE
GATE
6
7
11
10
7
6
1
R284
U114B
8
9
10k
U116B
U108-17 (1)
1
OPT
RX AUDIO
U113D
9
GATE
5
RX SQUELCH
16
11
10
6
7
ACTIVE
WO101 WO102
U114C
14
GATE
8
+5V
+5V
U108-14 (1)
RX AUDIO
CR107
4.3V
C249
2
.1
EXP OUT
R215
1 EXP IN
5
COMP IN
WO 100 (3)
1k
A301
R216
COMPANDING
10k
OPTION
4
C119
COMP OUT
WO 103 (3)
.1
R121 47k
SCHMITT
R127
U123B
TRIGGER
470k
3303
U123C
R125
R126
3303
U123D
U117A-3 (1)
7
9
100k
100k
8
12
3303
TX INTERCOM
+
+
10
14
+
+ C240
13
R124
1
1M
-5V
R123
R230
330k
+5V
7.5k
R228
LOGIC SQUELCH
5.1k
CR100
U159B-6 (3)
R229
R231
1K
10k
RX DATA
U111-8 (1)
R276
CR106
18k
C201
C202
C203
C204
C205
C206
C264
C265
C266
C208
C209
.01
.01
.01
.01
.01
.01
.01
.01
.01
.01
.01
October 1999
Part No. 001-2009-201
+5V
+ C295
220
+ C251
LOCAL AUDIO
C254
R254
ON/OFF/
15
.1
AMPLIFIER
47k
VOL
5
C286
R291
10
1k
R236
1
4
10k
U132
R292
R290
TDA2003
39
1
C299
C291
C283
.01
.1
.1
2
C284
3
220
VOICE AMPLIFIER
R257
R256
R238
36k
36k
100k
C292
360pF
U115C
RX VOICE
TO
C305
U120B
BACKPLANE
6
2904
10
7
10
11
5
+
CR117
9
15V
CR118
U108-13 (1)
15V
RX VOICE
U115D
TO BACKPLANE
RX NET
R300
R302
R238
GATE
36k
36k
100k
15
14
16
U165B
R178
6
2904
100k
7
U155-18 (1)
5
+
RX NET
C289
300pF
MAIN AUDIO AMPLIFIER
R259
R258
R177
R239
U166B
10k
2.2k
10k
100k
6
MC33178
+
7
C290
5
300pF
U166A
C243
2
MC33178
10
1
3
+
U116A
R182 100k
SECONDARY AUDIO
FSK TO
AMPLIFIER
C287 300pF
AUDIO
R263
R262
R181
R241
GATE
U131B
10k
2.2k
10k
100k
2
3
6
3303
+
7
1
C288
5
300pF
U108-12 (1)
FSK TO AUDIO
U131A
C246
R184
2
3303
10
300
1
3
+
GATE
+5V
C247
R260
R261
R240
1
36k
300k
100k
11 TXOUT
24
Vcc
U165A
13 VBIAS
5
M0
2
2904
C159
1
6 M1
14
RXEQ
.1
3
+
U109
7 RXIN
18
CLK
FSK AMPLIFIER
MX614TN
12 GND
R203
2 XTAL/CLK
17
TXD
+5V
+ C158
10
5 M0
U110
MX614TN
R198
19
+5V
RXD
10k
24
8
Vcc
RXAMPOUT
6
M1
14
7
RXEQ
RXIN
18 CLK
13
VBIAS
1
XTAL
Y100
R197
C155
12
GND
2.4576MHz
1M
15pF
2 XTAL/CLK
C166
TXD
15pF
17
C210
C211
C212
C213
C214
C215
C216
C217
C218
C229
.01
.01
.01
.01
.01
.01
.01
.01
.01
.01
MAIN AUDIO CARD SCHMEATIC (2 OF 3)
FIGURE 10-37
10-32
LOCAL AUDIO
OUTPUT
C285
J104
470
EXTERNAL
SPEAKER
J101
SPKR/MIC
R288
220
R287
R232
100
100
R289
2.2
P100
31 RX VOICE
C244
R179
10
300
14 RXA-
R180
300
13 RXA +
C245
R183
S100
10
300
10
7
2 RXS-
SECONDARY
9
8
AUDIO TO RNT
11
6
1 RXS+
U162C
14
3
12
5
RS-232 DATA
TO/FROM RNT
P101
R200
10k
2.2k
23 RNT TX DATA
22 RNT RX DATA
S101
U162C
2
7
15
2
16
1
TXS+ TO S100-2 (3)
1
8
R222
C307
C156
100k R199
100pF
100k
.1
U153D-14 (3)
U153C-7 (3)
C306
.1
Advertisement
Table of Contents
