SmartTrunk Systems ST-2112D, Service Manual, Page: 32 / 55

9. ST-2112 SCHEMATIC
PAENA
CSRAM
Title
Size Document Number Rev
Date: Sheet of
DM-0911-15 F
RC-2112 R1.4 REF LAY OUT 1.4
D
1 1 Friday , July 11, 2014
U10
BH7824
CTLR
1
B_OUT
2
B_IN
3
SP_IN
4
SP1
5
VCC
6
GND
7
SP2
8
C44
1nF
C173
10nF
F1
C2Q 3
C175
1uF
+
C93
10uF 2K2
C174
1uF
R141 6.8K
R106
10K
R107
120K
D6
DAN222
1
3
2
R45
47K
5VAF
C178
2.2uF
VOL
C179
1nF
J3
ROTARY
1
2
3
4
5
6
PWR_FB
C176 100nF
C194
100pF
18V +5V
C235
10nF
+
C231
10uF C248
10nF
U16
HT7218
Vin
1
GN
D
2
Sht
3
Vout
5
BP
4
C249
1nF
R126
10
C45
NC
C74
100nF
Q5
DTC114EM
R121
47K
C223
1nF
R115 10K
C193
47pF
R95
10K
R41
1K
C160
1uF
C148
1nF
C98
1uF
R90
10K
PWR_TUNE
C119
100nF
C120
10uF
R96
3K3
C158
1uF
C149
1nF
R91
10K
MOD2
R42
4K7
Y 3
16Mhz
1 2
3 4
R79
47
C192
47pF
C140
100nF
t
RT1
33tk
1
2
C169
1nF
3VD
PRO CESSO R CLO CK
C5
100nF
UPCK
C155
NC
J6
CON4
1
2
3
4
C66
100nF
C89
NC
150
220K
10
1uF
MOD1
MOD2
15pF
C191
47pF
R81 1K
R85 1K
C144
1nF
CLKADJ
CLKADJ
C
258
100nF
CSFM
TP3
1
TP1
1
TP2
1
C161
0
R94
10K
R89
33K
C156
100nF
SDA
SCL
3VA
C145
1nF
C147
NC
3VD
10pF
SCL
SDA
+7V +5V
C187
1nF
C190
100pF
C189
100pF
C188
1nF
10uF
BAR63
L18
LCB1608-600
C186
1nF
C80
2.2uF
C127
10nF
R32
22K C81
NC
C184
1nF
5pF
U4
AT23DF321
CS
1
SO
2
WP
3
GND
4
SI
5
SCK
6
HOLD
7
VCC
8
VBUS
3VD
R93 10K
R31
100K
MOD1
C224
1nF
J7
HEADER 2
1
2
U5
CMX-7141
SMOSI
1
SSCK
2
SMISO
3
SCS
4
BOOTEN1
5
BOOTEN2
6
DVSS
7
IRQN
8
VDEC
9
GPIOA
10
GPIOB
11
SYSC
LK1
13
D
VSS
14
T
XEN
A
15
D
ISC
16
D
ISC
F
B
17
ALT
18
ALT
F
B
19
MICFB
20
MIC
21
AVSS
22
M
OD
1
23
M
OD
2
24
VBIAS
25
AUDIO
26
ADC1
27
ADC2
28
ADC3
29
ADC4
30
AVDD
31
DAC1
32
DAC2
33
AVSS
34
DAC3
35
DAC4
36 D
VSS
37
VD
EC
38
XT
AL/
C
LK
39
XT
ALN
40
D
VD
D
41
M
OSI
42
M
ISO
43
SSOU
T
44
D
VSS
45
SC
K
46
SYSC
LK2
47
C
SN
48
AGND
49
U6
CMX-618
AVDD
1
AVSS
2
BIAS
3
VSSREF
4
INPP
5
INPN
6
AVDD
7
AVSS
8
VSSPA
9
OUTP
10
OUTN
11
VDDPA
12
VD
D
13
IOVD
D
14
EC
D
I
15
EC
D
O
16
EC
C
LK
17
EC
C
S
18
EEC
19
R
ESC
20
NC
21
VSS
22
C
SEL
23
IOVD
D
24
SY NC
25
VSS
26
XTALIN
27
XTALOUT
28
IOVDD
29
RESETC
30
XTALSEL1
31
XTALSEL2
32
XTALSEL3
33
ENABXTAL
34
IOVDD
35
NC
36
NC
37
NC
38
NC
39
NC
40
VSS
41
SC
LK
42
SM
OSI
43
SM
ISO
44
C
SC
45
IR
QC
46
IOVD
D
47
VD
D
48
AGND
49
RADIO CLOCK
R4 NC
GPSRX
GPSTX
POWER CONTROL
SCK
MISO
MOSI
R14 1K
C64
100nF
IRQA
R58 1K
AUDIO
GPSTX
3VA
C65
1nF
ROW3
TX POWER SUPPLY
C49
5pF
ROW2
ROW1
NAV
GPSRX
C106
10uF
C105
10uF
10pF
Y 2
TXCO19.2M
1 2
3 4
R40
47
C99
100nF
C47
100nF
C48
1nF
Q4
DTA114EM
R137
1K
C206
1nF
C207
1nF
C210
1nF
C211
1nF
C208
1nF
C209
1nF
C212
1nF
13nH
C76
NC
C216
1nF
L15
47nH
82pF
PWCTRL
L9
27nH
R52 1K
C50
NC
R15 1K
CSR
RDA POWER SUPPLY
C88
1nF
C97
1nF
R39
100
R44
100
3VD
XC2
XC1
XC2
XC1
CODEC
C213
1nF
C214
1nF
D3
BAR63
C215
1nF
PRO G RA M M IN G
27nH
0
15nH 15nH
13nH 13nH 13nH
13nH
150pF
150
47pF
R68 22
R70 22
UPCK
22
R55
10K
3VD
CSD
VBAT
SUB
FNC
D0
D2
D1
D4
D3
D5
D6
2pF
U18
XC6201
VIN
3
VOUT
1
GN
D
2
D7
GPS
SCK
MISO
MOSI
+
C198
10uF
C183
1uF
SCK
MOSI
MISO
7pF
10pF
33pF
C25
1nF
C51
NC R25
560
U8
AT90USB
BIAS
1
SMTK
2
NC1
3
UDP
4
UDM
5
UVSS
6
UCAP
7
VBUS
8
UID
9
TX_LED
10
SCK
11
MOSI
12
MISO
13
SPEECH
14
IRQVOC
15
C3VR
16
IR
QN
17
GPS
18
R
ESET
20
VC
C
1
21
GN
D
1
22
NC2
23
SYSC
LK
24
SC
L
25
SD
A
26
R
XD
27
T
XD
28
R
SW
A
29
R
SW
B
30
R
SW
C
31
R
SW
D
32
EXTPTT
33
IRQR
34
CSFM
35
CSRAM
36
CSR
37
CSD
38
CSA
39
CSN
40
CBL
41
SUBD
42
RX_LED
43
D7
44
D6
45
D5
46
D4
47
D3
48
D2
49
D1
50
D0
51
VC
C
2
52
GN
D
2
53
SI
D
E
54
VBAT
55
FMIC
56
R
OW
1
57
R
OW
2
58
R
OW
3
59
FNC
60
N
AV
61
AVC
C
1
62
AGN
D
63
AVC
C
2
64
CHR
19
GND
65
13nH
R22
2K2
Q2
2SC3356 3
2
1
R111 1K
BAT
U11
MIC2290
IN
2
EN
3
GN
D
4
GN
D
8
SW
7
OUT
1
FB
6
NC
5
HS
9
L17
10uH
+
C181
10uF
R26
22
C52
150p
6.8pF
R108
33K
R110
3K3
+ C182
10uF
RESET
R92 10K
C136
4.7uF
VCTRL
3VD
TEMP
D5
RR264M
RESET
MOSI
SCK
MISO
VBUS
UDP
UDM
UID
UVSS
150pF
C20
10nF
CBL
L5
47nH
P1
TEST 1
1
1
R16
470
MAIN CLOCK
15pF
C14
150pF
R12
10
TX5V
DET
C26
100pF
C33
8pF
C67
NC
CSA
150pF
220K
C62
100pF
L16
NC
L14
0
C34
**
L10
0
D4
HSM88AS
3
1 2
AUDIO
SIDE
SDA
C40
1nF
IRQA
BAR63
C168
10uF
C167
100nF
RXD
C219
100pF
TX5V
NAV
JP2
CONN18X2
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
21
21
22
22
23
23
24
24
25
25
26
26
27
27
28
28
29
29
30
30
31
31
32
32
33
33
34
34
35
35
36
36
U2
MCP6241U
Vin+
1
VSS
2
Vin-
3
Vout
4
VDD
5
R43
82K
C90
10nF
R34
120K
C83
10nF
TP9
1
R35
470K
P4
HEADER 1
1
1
P5
HEADER 1
1
1
P6
HEADER 1
1
1
P7
HEADER 1
1
1
P8
HEADER 1
1
1
P9
HEADER 1
1
1
P10
HEADER 1
1
1
P11
HEADER 1
1
1
MOD1
MOD2
R17
47
VOL
AUDIO
OUTP
RV1
10k
3 1
2
4 5
R18
47K
C61
0
DET
MOUT
PWR_TUNE
3VD
PWFB
C123
100nF
C124
10uF
C222
10nF
18V
P12
HEADER 1
1
1
P13
HEADER 1
1
1
P14
HEADER 1
1
1
3VA
C138
10nF
C220
100pF
C16
10nF
C15
150pF
R83 4K7
3VD
PWR_TUNE
R13
10K
Q3
2SK3475
1
3
2
+7V
+
C257
22uF
P17
HEADER 1
1
1
P15
HEADER 1
1
1
P16
HEADER 1
1
1
3VD
3VR
3VD
L6
27nH
5VAF
+5V
C21
1nF
+7V
C77
NC
L2
BEAD
1
2
C153
100nF
C154
1nF
C4
10nF
C3
1nF
3VD
R72 330
RA D IO
C103
1nF
3VR
13nH
TXLED
RXLED
D8
LTST-C195KGJRKT
2 4
1 3
3VR
PINK VALUES CORRESPOND TO ST-2112C
+
C63
10uF
C29
NC
C24
68pF
R76 330
P18
HEADER 1
1
1
+
C82
22uF
100pF
100pF
47pF
1uF
7pF 22pF
0.5pF 0.5pF
150pF
6.8pF
C118
1nF
L8
0
C117
100nF
C35
**
TP7
1
C36
**
TP8
1
TP5
1
TP6
1
C37
15pF
TP4
1
C38
56pF
R23
470
SPEECH
C19
1nF
Q1
2SK3476
1
3
2
22pF
10
R87
10K
SMTK
C43
NC
C41
NC
C42
NC
18V
15nH
C46
NC
R98
4K7
CSA
C141
1uF
C116
1nF
C115
100nF
R21
47
C17
1uF
J8
HEADER 2
1
2
C18
150pF
27pF
3VA
FNC
ROW3
ROW1
ROW2
C135
100nF
R19
10K
R10
10K
PWR_TUNE
PWFB
R11
47K
TEMP
C139
NC
L4
27nH
L1
LCB1608-600
1
2
+7V
C134
100nF
3VD
C13
1nF
C12
470pF
C1
150pF
Y 1
12.8Mhz
1 2
3 4
+
C2
10uF
R100 1K
C84
1nF
CSN
C162
1nF
GREEN VALUES CORRESPOND TO ST-2112V
IRQR
C230
1nF
SCL
R133 10K
CHR
MICP
MICN
5pF
7pF
C163
1nF
CBL
C128
1nF
C146
NC
R62
10K
R104
0.2
BAT
CHR
R86 1K
VBUS
R97 1K
100pF
3VR +5V
OUTP
C233
10nF
C164
1nF
+
C227
10uF
OUTP
R124
2.2
U14
HT7233
Vin
1
GN
D
2
Sht
3
Vout
5
BP
4
+
C228
10uF
SMTK
C137
100nF
C129
1nF
R82
10k
C180
100pF
J9
HEADER 2
1
2
C170
NC
18V
C87
NC
C150
100nF
C165
1nF
SMARTRUNK SYSTEMS, INC
C130
1nF
VCTRL
R9
1K
27pF
ACCESORY
LEDS
MAIN POWER SUPPLY AUDIO POWER SUPPLY
EXT PTT
PROCESSOR POWER SUPPLY
MICROPHONE
ANALOG POWER SUPPLY CODEC POWER SUPPLY
BATTERY
BATTERY CHARGER
MEMORIES
C152
100nF
R131
10
MAIN PROCESSOR
C255
10uF
C256
10uF
R129 6.8K
13nH
C131
1nF
R117
47
J1
Antenna
1
2
3
4
5
6.8pF
0.5pF
C5VT
3VD
AUDIO PA
150pF
R132 10
C142
1nF
MICN
+5V
R27
2M2
+7V
C171
NC
+
C236
1uF
R127
2.2
U17
XC6201
VIN
3
VOUT
1
GN
D
2
+
C237
10uF
L7
3.3nH
CSRAM
CSFM
C78
150pF
R29
100
J2
USB
1
2
3
4
5
6
7
CSR
C32
1nF
C30
1pF
CSN
R80 0
C55
15pF
R30
100K
R78 0
C58
18pF
PWFB
C31
1pF
R73 0
R28
100
R77 0
L13
22nH
R75 0
C59
5pF
R74 1K
R61
10K
R66 1K
R71 1K
R59
10K
R69 1K
R60
10K
R67 1K
R65 1K
R63
10K
3VD
R7 1K
R5 1K
R6 1K
C143
NC
PAENA
D7
RB886
IRQN
IRQR
+7V
R128
2.2
PWR_FB
3VD
R54 1K
R53 1K
R51 1K
C121
1nF
R119
10K
R114
22K
VINT
R112
100K
C23
1nF
MODEM
2.4pF 2pF
15pF
TX5V
R8
100
C8
470pF
L3
.82uH
3VD
L12
22nH
C57
27pF
C54
12pF
MISO
SCK
MOSI
0.5pF
VBUS
15nH
3VD
MISO
U7
23K640
CS
1
SO
2
WP
3
GND
4
SI
5
SCK
6
HOLD
7
VCC
8
SCK
MOSI
C151
100nF
R138
100
SPEECH
DET
22
3VR
C7
1nF
L11
22nH
C56
39pF
C110
1nF
C27
82pF
D1
BAR88
R139
100K
FMIC
22uF
FMIC
MICP
C159 1uF
MOUT
EXTK
C244
1nF
C247
1nF
EXTK
3VD
R113
470
R116
4K7
C111
1nF
D9
RB886
C185
4.7uF C199
100pF
U1
RDA1846
AVDD1
1
SCK
2
MOSI
3
AVDD2
4
XTAL1
5
XTAL2
6
MODE
7
CSR
8
AF
O
9
NC1
10
MIC
11
CC
12
AVD
D
3
13
NC2
14
RFIN
15
AVD
D
4
16
NC3
17
RFOUT
18
NC4
19
NC5
20
AVDD5
21
PABIAS
22
AVDD6
23
PDN
24
IO7
25
IO6
26
IO5
27
IO4
28
M
ISO
29
INT
30
SU
BD
31
SU
B
32
GND
33
C100
100nF
R56
10K
C112
1nF
IRQVOC
MISO
CSVOC
MOSI
SCK
C226
1nF
SCK
15pF
15pF
CSVOC
C53
10pF
C
241
1nF
IRQVOC
MOSI
C232
1nF
C200
100pF
TXLED
RXLED
C113
1nF
R57 22K
R64 1K
27nH
C201
1nF
2K2
C240
10nF
C202
1nF
R120
100K
C73
1nF
C72
100nF
C3VR
MOUT
2.4pF
C3VR
C60
0
3VD
+5V
LS1
SPEAKER
C68
150pF
C251
10nF
+
C243
10uF
C254
100nF
C
253
1nF
R130
2.2
U19
HT7233
Vin
1
GN
D
2
Sht
3
Vout
5
BP
4
TXD
C252
10nF
TXD
U3
HT7250
Vin
1
GN
D
2
Sht
3
Vout
5
BP
4
TX5V
C177
100nF
C166
100pF
C203
1nF
C94
10nF
JP1
PROG
1
2
3
4
5
6
7
R37
2.2
R134
2K2
R135
1K
+7V
VINT
+
C91
10uF
R140 10K
EXTPTT
CSD
GPS
C101
10nF
C5VT
J4
3.5mm
1
2
3
4
5
+
C238
1uF
C71
1nF
C70
1nF
R2
10
3VA
SW4
SW KEY -Y M061
1 2
3
4
5
6
7
8
R136
4K7
SIDE
+5V
C204
1nF
+ C95
10uF
C234
10nF
+
C229
10uF
PWCTRL
U15
HT7233
Vin
1
GN
D
2
Sht
3
Vout
5
BP
4
C246
1nF
R125
2.2
R105 22k
C245
10nF
R109 22k
C11
1nF
J5
TG-2915
1
2
3
4
5
C96
10nF
C10
100nF
SIDE UP
PTT
R33
100
SIDE DOWN
EMERGENCY
C126
100nF
C125
NC
SUB
5VAF
C205
1nF
VBAT
R122
33K
+
C239
10uF
R123
47K
C122
1nF
RCLK
RCLK
+
C86
10uF
TX5V
R36
56K
0
RXD
3VD
MK1
MIC
1
2
C217
1uF
C85
10nF
TX5V
D1
D0
D2
R46
47K
D3
D4
C102
10nF
REFERENCES
IF COMPONENT IS DIFERENT BETWEEN THE DIFERENT
MODELS, THEN Y OU WILL FIND THREE VALUES UNDER THE COMPONENT.
BLUE VALUES CORRESPOND TO ST-2112V
D5
D7
D6
IRQN
C133
1nF
C
250
1nF
150pF
5pF
R38
22K
R118
1K
R50
10K
C157 1uF
EXTPTT
C242
10uF
C132
10uF
3VA
U12
MCP6241U
Vin+
1
VSS
2
Vin-
3
Vout
4
VDD
5
C114
1nF
C221
4.7uF