Motorola VRS750 Service Manual page 98

BOOT-CNTRL
(J20-16) J30 28
C164
220pF VR112
5.6V
RXD
23
(J20-11) J30
TP110
C179
J30
(J20-8) 20 220pF
P101-7
TXD
J30 24
(J20-12)
EXT_SPKR+
(J20-4) J30 17
P102-16
P102-17
C165
C207 220pF
VR123
220pF 5.6V
C104
EXT_MIC
J30 19
(J20-7) EXT_MIC
1uF
TP101
BUSYIN
J30 21
(J20-9)
BUSYOUT
J30 4
(J40-13)
RESET
(J40-20) J30 5
5V
J30 16 P101-1
(J20-1)
(J20-10) J30 22
(J20-13) J30 25
J30 29
(J20-19)
R108
J30 30
(J20-20)
68K
C109
PROG_SENSE VR121
J30 10
(J40-25) 220pF
5.6V
TP112 R109
100K
J30 7
(J40-22)
C105
URX_SND
J30 11
(J40-28)
0.1uF
J30 1
(J40-1)
J30 2
TP102
R114
SNGL_TX_DATA
J30
(J40-21) 6
330K
C111
220pF
SNGL_DET
(J40-29) J30 12
TEST_MODE-IN
(J40-24) J30 9
TONES-MOBILE_AUD
J30
(J40-23) 8
SW7.5V
P101-3
*
PTT
P102-4
VR118
5.6V
C113
R225
C189
R224
10K
2200pF
2
100K
1uF
C190
R220 R221
3
680pF 0 22K
VR113
5.6V
6
C188
C194
7
VAG 220pF
1000pF
5
C191
220pF U107-2
MC33072
R136
10K
9.6V
VRS_TX*_RX
U101-2
Q113
MC14053B
R110 11
15K
P101-9
SW7.5V
12
5V
13 14
C107
R111
220pF
27K
R112
100K
RX_FIL_AUD
C108 R113
U100-1
3
9.6V
100K
.1uF 2
MC33072
R115
75K
R116
30K
C145
1000pF
J30 26 RSS
3 (J20-14)
(J40-2) J30
TP120 TP111
5V
P102-1
C175 C161
220pF VR115 220pF
15V
TP121 TP122 TP123 TP124
U107-1 C183 C103
T1
1
1 6
1uF 1uF
MC33072
5
C112
220pF 3 4
5V
R138
4.7K
U103-5
R137
10 11
Q103
MMBT3904
10K
MC14106
C122
R213
220pF
4.7K
7.5V
R217 R215
D
1K
Q112 Q111 27K
MMBT3904 R216
G
1.5MEG
C204
S
MMBT3904
220pF
C203 C205
C182
220pF 220pF
10uF
C117
.015uF
C115
.01uF U124-3
9
R122 R123
8
R121
10
27K 27K
1
10K MC3303
C116
R120
.01uF
10K
R119
6.8K
C114
.01uF
TX_RX_AUDI O
27
(J20-15) J30
TP113
VRS750 Vehicular Repeater System
86 Printed Circuit Board Schematic Diagram (Sheet 1 of 2)
P102-3
5V
VR102 DNP
5.6V
R101
68K
U103-2
Q100 R102 4 3
MMBT3904
10K
C100
MC14106
220pF
5V
R211 Q110
9.6V
MMBT3904
R210
10K
R200
R212
1K C202
220pF 4.7K
10K
U102-2
5V
MC14053B
11 9
12 5
R155
10K
13 14 3 4
U102-3
MC14053B
VAG
C121 U124-4
12
100pF
14
C120 13
R124
MC3303
10K 0.1uF
R126
U124-2
6
15K
7
5
MC3303 U124-1
3
R125
D100
C118
56K 1
1000pF D101
2
MC3303
C119
0.22uF
TP103
R173
10K
R172
C180
1000pF 10K
R104
A
U100-2
5
R118 100
7
C101
6 33pF
R105
4.7K
B
MC33072
R117 100
4.7K
5V
R106
4.7K Q101
U103-3
R107
MMBT3904
5 6
6.8K C102
MC14106
220pF
C
D
E
F
5V
C146
R139
220pF
1K
Q104
R140
MMBT3906
4.7K
G
H
R127
SNGL_OUT
R175
10K
10K
5V
TP104 R171
47.5K
1%
6
R128
S1
100K
1% 3
R129
7
27.4K 1% S1
R174
2
27.4K 1%
8
R130
S1
22.1K
1% 1
9.6V
C206
R131
I
100K
220pF
1%
R156
J
1K
C125 R166
4.7K
220pF