Service Manual

86
(J20-16)
URX_SND
(J20-1)
*
(J20-15)
(J40-29)
(J40-24)
(J20-4)
(J20-12)
(J40-28)
(J40-20)
(J40-2)
EXT_MIC
(J40-22)
(J20-10)
(J20-13)
(J20-19)
(J20-20)
(J20-9)
(J20-14)
(J20-8)
(J40-21)
(J20-7)
(J40-1)
(J40-25)
(J20-11)
(J40-13)
(J40-23)
DNP
.015uF
C117
3
1
U124-1
MC3303
2
J30
20
9.6V
C104
1uF
27K
5.6V
VR112
R122
J30
5
2
3
1
C119
0.22uF
33pF
U100-1
MC33072
1000pF
C145
C101
220pF
C205
C204
220pF
220pF
C203
220pF
C202
220pF
C206
U124-2
MC3303
6
5
7
1K
R217
J30
21
2
J30
4.7K
R166
10K
R102
220pF
VR123
5.6V
P102-17
C207
P102-16
R118
4.7K
R171
1%
J30
17
27K
R111
47.5K
T1
1
34
5
6
P101-9
R114
330K
J30
1
J30
6
R175
VAG
10K
C188
220pF
TP112
R117
4.7K
R137
10K
25
J30
J30
4
5V
5.6V
VR121
10K
R225
MMBT3904
Q103
5.6V
VR102
8
R220
0
1000pF
U124-3
MC3303
9
10
16
C118
MMBT3904
Q112
J30
8
1
TP110
28
S1
J30
C146
220pF
Q111
MMBT3904
1000pF
C180
1uF
C189
TP111
C165
220pF
C111
220pF
220pF
C109
C113
R123
2200pF
27K
MC33072
U107-1
2
3
1
R212
10K
J30
24
MMBT3904
Q110
TP113
220pF
C102
15K
R110
5.6V
VR113
R113
100K
22K
R221
10uF
C182
27K
R215
R107
6.8K
5V
100K
R224
C114
.01uF
D
G
S
4.7K
R213
J30
7
Q113
R174
27.4K
VR118
5.6V
VAG
1%
J30
22
J30
11
R172
10K
5V
C100
220pF
S1
6
3
100
22.1K
R130
1%
220pF
R104
R127
10K
C161
220pF
C112
R156
J30
10
1K
R126
15K
C175
D100
220pF
R140
100K
4.7K
SW7.5V
R112
10K
R211
P101-1
1K
R210
4.7K
R200
TP101
J30
3
C122
220pF
U103-5
MC14106
1110
1uF
C103
100K
R109
6.8K
P102-3
J30
26
R119
C116
.01uF
U107-2
MC33072
6
5
7
0.1uF
Q104
MMBT3906
10K
C105
C107
R173
220pF
9.6V
R216
C194
1.5MEG
13
MC14053B
U102-3
9
4
5
3
1000pF
MC14053B
U102-2
11
14
12
220pF
C191
7.5V
P102-1
5V
0.1uF
C120
68K
P101-7
VR115
15V
R108
R105
R106
4.7K
U124-4
13
12
14
100
R139
1K
MC3303
10K
68K
R124
R101
U101-2
MC14053B
11
14
12
13
J30
12
J30
30
5V
9.6V
J30
8
J30
9
R128
100K
1%
TP104
R120
10K
R116
30K
4.7K
R138
5V
Q100
MMBT3904
R125
56K
J30
27
C164
220pF
SW7.5V
5V
7
2
MC14106
U103-3
56
J30
29
S1
R155
10K
10K
R136
10K
J30
23
P101-3
J30
19
R121
Q101
MMBT3904
C179
P102-4
220pF
C121
100pF
D101
TP103
MC14106
U103-2
34
1%
9.6V
.1uF
C108
100K
R131
75K
R115
TP123 TP124TP121 TP122
27.4K
R129
1%
C125
220pF
5V
5V
C183
1uF
TP120
U100-2
MC33072
6
5
7
C190
680pF
TP102
.01uF
5V
EXT_SPKR+
C115
TXD
SNGL_DET
TEST_MODE-IN
RSS TX_RX_AUDIO
PTT
VRS_TX*_RX
BUSYOUT
BOOT-CNTRL
RXD
SNGL_TX_DATA
TONES-MOBILE_AUD
RESET
BUSYIN
RX_FIL_AUD
PROG_SENSE
EXT_MIC
SNGL_OUT
A
B
C
D
E
F
G
H
I
J
VRS750 Vehicular Repeater System
Printed Circuit Board Schematic Diagram (Sheet 1 of 2)