Figure 10-10. Receiver Audio Filter And Sub-Tone Schematic Diagram - Motorola EP350 Service Manual

Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz)
+3.3V
C191 + C190
220pF 10uF/16V
C602
0.22uF(K)
SW/VOL1
RY8418
RX_AF1
1
2
1
3
2
3 4
4
5
5 6
6 7
7 8
AUDIO_IN
8 9
9 10
11
10
C620
11 12
470P
12
R131
10R
R104 R105 R106
C199
47K 47K 47K
470P
C100
1uF(1608)
C112 R1001
C114
10uF/16V R1003 10K
10K 220pF
+
R1002
9.1K
C113
R146
560pF
0R
FL102
3.5795MHz
R145
SDATA
1M
C115 C116
SCLK 27pF 27pF
CSN
C125
47nF
+3.3V
R150
R181
10K(1%)
150R
C153
1uF
R151
12K(1%)
C154
1uF
U106
TC7S66FU
1 2
4
DCS_SEL
Q101
C156
KRC413
0.22uF(K)
C129
R127 33K
C126 47nF
33nF
C127
C128
47nF
47nF
2
-
1
3
+
R126
R191
NJM324
15K R128
15K
C110
U105-A
3.9K
22nF
R122
Q103
330K
KRC413
Q104
KRC413
RX_TONE_CON2
+5V
Q102
KRC413
C157
0.22uF(K)
4
+
U105-E
-
NJM324
11
R129 150K
C130
C158
33nF R132
0.22uF(K)
6
-
7
5
+ R133
NJM324
R192
U105-B 15K
R121
C109
R149
330K
22nF
100K
1/2VCC
Q113
KRC404
RX_TONE_CON1

Figure 10-10. Receiver Audio Filter and Sub-tone Schematic Diagram

10-8
R134 4.7M
10K
9
-
8
TONE_INT
10
+
NJM324
470K
U105-C
C134
0.22uF(K)
RX_TONE_EN