Figure 10-9. Transmitter Audio Filter And Sub-Tone Schematic Diagram - Motorola EP350 Service Manual

10-7
C543
1.2nF
C522
5.6nF
R508
TO_VCTCXO&VCO 6 R514
1K -
7
24K
5
+
NJM324
U501-B
R509
C568 C517
2.2K C523
10nF 22nF
1nF
GND
R529 47K
+3.3V
R530 47K
R531 47K
R540 47K

Figure 10-9. Transmitter Audio Filter and Sub-tone Schematic Diagram

+3.3V J601
0980683Z01
1
R194
3
6.8K
2
C140
47nF 4
2 5
6
1
7
MIC1
C142
L604
0B27P40(2.8mm)
470pF
2.2uH(1608)
CR601
KDZ5.1V
C141
NA
+5V
4
NJM324
+
C529 C530
U501-E
-
0.1uF 10nF
11 U502-E
C544
NJM324
NA
C524
33nF
R519
2M
R515
2 R516 R517 R538 R518
12K -
1 9
12K 15K 8.2K 5.6K -
3 8
+
10
+
NJM324
R597
U501-A NJM324
C542 C547
4.7K
C525 C548
U502-C
10nF NA
330P NA
R536
330K
R521
330K
1/2VCC
R526
100R
PTT1
+3.3V
FUN_KEY1
FUN_KEY2
C570 PTT2
47pF
R537
1K
Q505
KRA305
Q504
KRC404
TX_AF2
R137
4.7M
C135 47pF
C139
R135
10K
0.1uF(K)
13 -
14
1/2VCC 12
+
C137
R136
NJM324
0.1uF(K)
100K
C136 105-D
0.1uF
R111
+3.3V
NA
R120
47K
Q114 VOX_EN
KRC404
C518
C520 5.6nF
4.7nF
PROGRAM_DATA
R511 R510 13 -
C546
R512
9
R513 - 8.2K 15K
0.1uF
20K 8 12
10K +
10
+
NJM324
NJM324
U501-D
U501-C
R539
C549 C521
330K C550 C519
560pF
1.2nF
560pF 1.2nF
1/2VCC
MOD_CON_U/D
MOD_CON_CS
+3.3V
+3.3V
C199
U508
+
470pF
8 1
U/D VDO
R520 C528 7 2 C191 C190
NC VSS
560K 18nF 220pF
10uF / 16V
6 3
B A
R598 5 4
CS/ W
20K
MCP4011(503)
R599
NA
C100
1uF(1608)
C536
1/2VCC R541
10nF
330K
R545
2 R528
4.7k - R527
1 82K
100K
3
+
+
NJM324
C567
U502-A
10uF / 10V(A)
C537
2.2nF
U101_PIN31(SDATA)
U101_PIN30(CLK)
U101_PIN29(CSN)
Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz)
VOX
CR117
KDS160E
R138
CR116 220K
KDS160E
C138
0.22U(K)(1608)
R103
150K
C103
C111 R102
C101 R101
1uF(K) 47pF
1uF(K) 47K
10K
14
R162 C102
820R
R107 2.2nF
3.9K
R117
8.2K
C104
150pF
+3.3V
R181
R150
150R 10K(1%)
R104 R105 R106
C153
47K 47K 47K
1uF(K)
R151
12K(1%)
C154
1uF(K)
C119 R141
10nF 100K
R146
0R
U101_PIN79
C120
FL102
15pF
3.5795MHz
R145
1M
C115
C116
27pF RX_AF2
27pF
C117 1.2nF
R143 91K
C118
10uF / 16V
R144 100K
+
R118 C106 R116
47K 47nF
1.2K
U101-PIN26(DTMF_IN)
R110
270K
C107
0.1uF(K)
C105
15nF
+3.3V
C121
33nF
1 20
IN+ VDD
2 19
IN- ST/GT
R140
R142
3 18
GS EST
330K
68K
4 17
U101_PIN72
VREF STD
5 16
INH NC
6 15
PWDN Q4
U101_PIN63
7
U101_PIN64
NC Q3
8
13
Q2
OSC1 U101_PIN65
9 12
OSC2 Q1 U101_PIN66
10 11
VSS TOE
U103
MT88L70
R180
TONE 4
100K
R179
TONE 3
51K
R182
TONE 2
200K
R183
TONE 1
NA