Figure 7-9. Transmitter Audio Filter And Sub-Tone Schematic Diagram - Motorola EP350 Service Manual

7-10
MIC1
0B27P40(2.8mm)
C543
2.2nF
C522
15nF
R508
TO_VCTCXO & VCO 6
3.6K R514 R515
7
15K 20K
5
NJM324
U501-B
R509
C517 C523
2.2K
15nF 470pF
R529 47K
+3.3V
R530 47K
R531 47K
C573
C570
47pF
47pF
R540
47K

Figure 7-9. Transmitter Audio Filter and Sub-tone Schematic Diagram

+3.3V
J601
0980683Z01
1
3
R194
10K C140 2
47nF
4
2 5
6
1
7
C142
470pF
PROGRAM_DATA
L604 C546
2.2uH(1608)
0.1uF(K)
C141
NA
C624
C625
47pF
47pF(1608)
1 / 2VCC
MOD_CON_U /D
MOD_CON_CS
C544
C583
NA
47pF
U508
8
U/D VDD
C524
7
47nF
NC VSS
6
B
5
CS/
2 C527
- R516 R517 R538
1 18nF
2.2K
15K 10K MCP4011(503)
3
+
NJM324
U501-A
C542 C547
C525 C548
10nF 2.2nF
2.2nF
NA
R536
330K
R526
- 2
47K
1
3
+
NJM324
U502-A
PTT1
+3.3V
FUN_KEY1
FUN_KEY2
PTT2
C574
47pF
R537
1K
Q505
KRA305
Q504
KRC404
TX_AF2
CR502
NA
R137
4.7M
C135
47pF
C139
R135
10K
0.1uF(K)
13 -
14
12
+
1 / 2VCC
NJM324
R136
U105-D
100K
R111 +3.3V
C136
C1032 NA
0.1uF
47pF
R120
47K
Q114
KRC404 VOX_EN
C518
C520
5.6nF
6.8nF
C111
13 1uF(K)
-
R511 R510
R513 R512 9 - 14
8.2K 15K
12
10K 20K 8
+
10
+
NJM324
R162
U501-D R107
NJM324 820R
3.9K
R539 U501-C
330K C519
C550
560pF 1.2nF
C549
C521
560pF
1.2nF
C576
47pF(1608)
+3.3V
C577
R519 47pF
4.7M
1
C528
R520
18nF
2 1M
R518
9
4.7K -
3 8
A
10
+
4
W NJM324
+3.3V
U502-C
R104 R105 R106
47K 47K 47K
R521
330K
C191
C1038 C3
220pF 47pF
47pF
1 / 2_VCC
C100
1uF(1608)
R541
330K
C536
15nF
R527 R528
82K
82K
+
C551
10uF / 10V(A) C1024
C579
C537 47pF
2.2nF 47pF
U101_PIN31(SDATA)
U101_PIN30(CLK)
U101_PIN29(CSN)
C1020 C1037
47pF 47pF
U106
TC7S66FU
1 2
4
C1025
47pF C1031
47pF
Q101
KRC413
C126
33nF
C125 C127
47nF
47nF
R126
15K
U101_PIN79(DTMF_DEC_EN)
C1029
Q103
47pF
KRC413
VOX
CR117
C137 KDS160E
0.1uF(K)
R138
CR116
220K
KDS160E
Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz)
R103
150K
C101 C103
R101 R102
1uF(K) 33pF
10K 47K
C102
2.2nF
R117
8.2K
C1023 C1022
47pF 47pF
R110
C104
270K
150pF
C1019
47pF(1608)
C105
15nF
+3.3V
R150
10K(1%)
C1039
47pF
C153 C154
1uF(K) 1uF(K)
R151
12K(1%)
C119
R141 1
10nF IN+
100K
2
IN-
3
GS
R140 4
VREF
C1028
68K
C1027
47pF 5
INH
47pF
R146
6
0R PWDN
U101_PIN79
7
C120
NC
FL102
15pF
3.5795MHz 8
OSC1
9
OSC2
10
VSS
R145
1M U103
C115
MT88L70
C116
27pF
RX_AF2
27pF
C117
1.2nF
C1026
47pF
R143
C1021 C118
100K
47pF
10uF / 16V
+
R144
100K
RX_TONE_CON2
+5V
Q102
C157
KRC413
C156
0.22uF
0.22uF U105-E
C129
R129
R127
47nF
150K
33K
C130
C128
2 - 47nF 33nF
1
6 -
7
3 +
C110 C1030 5
+
NJM324
22nF 47pF R128
U105-A
NJM324
3.9K
R122 U105-B
C109
R121
330K R149
22nF
330K
470K
Q113
Q104
KRC404
KRC413
RX_TONE_CON1
C106
R118 R116
47nF
47K 1.2K
U101_PIN26(DTMF_IN)
C107
0.1uF(K)
+3.3V
C121
33nF
20
VDD
19
ST/GT
18 R142
EST
330K
17
STD
U101_PIN72
16
NC
15
Q4
U101_PIN63
14
Q3
U101_PIN64
13
Q2
U101_PIN65
12
Q1
U101_PIN66
11
TOE
R180
TONE4
100K
R179
TONE3
51K
R182
TONE2
200K
R183
TONE1
NA
4
+
-
11 NJM324
R134
3.9M
R132
C158
1K
9
0.22uF -
8
U101_PIN3_16_23
10
+
R133
NJM324
680K
U105-C
1 / 2 VCC C134
0.22uF(K)
C1033
47pF
U101_PIN100(RX_TONE_EN)