Sony MEX-BT3700U / MEX-BT3750U Service Manual ▷ View online
MEX-BT3700U/BT3750U
MEX-BT3700U/BT3750U
5
5
(3/4)
MAIN
BOARD
1
(4/4)
MAIN
BOARD
2
(2/4)
3
MAIN
BOARD
5
0
6.1
0
2.4
5
3.3
3.3
3.3
3.3
1.7
1.6
0
0.6
0
6.1
0.6
0
0
3.3
14.2
14.2
14.2
7.2
14.2
14.2
3.3
2.6
0.9
5.1
5.1
3.3
3.3
5.1
5.1
5.1
3.3
1.6
0
14.2
14.2
13
0.5
4
1.2
0.7
14.2
5.1
5.1
13
5.1
5.1
0
4.8
0
0
5.1
5.1
0
5.1
5.1
JL022
2SC3052EF-T1-LEF
Q703
JL012
10V
100
C403
MAZ8180GMLS0
D703
15k
R600
JL013
0.01
C408
JL008
1000p
C705
JL023
JL025
100
R403
1k
R602
JL005
0
R409
16V
10
C401
1k
R406
MAZ8180GMLS0
D704
JL014
1k
R613
8P
CNJ600
7
8
4
5
6
1
2
3
10k
R705
10V
100
C407
MAZ8180GMLS0
D612
100
R400
MAZ8062GMLS0
D600
0.01
C400
JL010
TH600
0.01
C402
R610
100
MAZ8180GMLS0
D610
JL019
JL028
R617
330k
10k
R706
0
R612
0
R618
JL027
4.7k
R711
1k
R407
JL024
RT1N141C-TP-1
BATTERY CHECK
Q600
MAZ8180GMLS0
D601
100
R401
MAZ8180GMLS0
D705
JL016
14
13
12
11
10
9
8
7
6
5
4
3
2
1
BA8271F-E2
IC601
BUS_ON
RST
BATT
CLK
VREF
DATA_I/O
GND
DATA_OUT
DATA_IN
BU_CHECK
CLK_IN
BUS_IN
RST
VCC
3300p
C709
JL020
100
R611
0.47
C707
JL007
JL015
MAZ8180GMLS0
D702
0.01
C611
JL017
2SC3052EF-T1-LEF
Q701
0.1
C610
JL001
JL018
100k
R404
JL021
MA2ZD14001S0
D611
1000p
C704
47k
R709
JL004
47k
R710
47k
R704
1k
R614
330k
R616
JL003
0.01
C924
0
R408
25V
470
C600
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
28P
CN350
NCO
NCO
SYS_RST
BU_3.3V
BU_GND
NCO(FLASH_W)
VBUS_ON
Z_MUTE
VBUS_CHECK
D_GND
TXD(MC-BUS)
RXD(MC-BUS)
MECHA_8.5V
USB_GND
DR_6V
DR_GND
CD_ON
CDM_ON
AU_ATT
AU_LCH
AU_GND
AU_RCH
A_GND
A_3.3V
EJECT_OK
OPEN_REQ
BU_CHECK
WAKE_UP
JL011
J701
100
R615
0.47
C708
3300p
C710
0
R414
0
R415
0
R416
0
R413
0
R714
0
R713
0
R712
39k
R861
2SB1690KT146
Q854
0.1
C865
6
5
4
3
2
1
D
D
G
S
D
D
TPC6108(T5RSONYF,M
Q861
8
7
6
5
4
3
2
1
TC7WH123FU(TE12R)
IC853
A
B
CLR
GND
Q
Cx
Rx/Cx
VCC
MAZ8056GMLS0
D853
0.1
C851
4.7k
R867
10k
R873
0.22
C850
MA2J1110GLS0
D854
8
7
6
5
4
3
2
1
TPS40200DRG4
IC851
RC
SS
COMP
FB
GND
DRV
ISNS
VCC
470p
C869
1.5k
R855
470p
C856
RT1N141C-TP-1
Q852
100k
R858
10k
R868
MA24D5000BS0
D852
6
5
4
3
2
1
D
D
G
S
D
D
RSQ035P03TR
Q853
330k
R860
1k
R866
10k
R865
1500p
C858
0.1
C870
0.1
C861
1
C857
1k
R871
6
5
4
3
2
1
D
D
G
S
D
D
TPC6108(T5RSONYF,M
Q851
100k
R864
0
R872
0
R874
0.1
C854
0.1
C871
47uH
L851
36V
2A
FU851
10k
R869
0.1
C864
68k
R856
16V
220
C863
100k
R862
470p
C855
1
C860
15p
C859
68uH
L852
8
7
6
5
4
3
2
1
TPS2051BDRG4
IC852
GND
IN
IN
/EN
/OC
OUT
OUT
OUT
MAZ8120GMLS0
D851
47k
R851
47k
R852
1
C853
25V
470
C852
0
R870
22k
R863
560p
C406
560p
C405
FB418
FB419
FB420
L401
2.2uH
0
L400
17
18
20
22
19
21
23
1
7
6
5
2
4
8
9
10
11
16
14
15
13
28
27
24
25
12
MC_TX
CD_ON
CDM_ON
EJECT_OK
WAKE_UP
ACC_IN
UNISI
UNISO
BU_CHECK
VBUS_ON
UNISCK
Z_MUTE
BUS_ON
MC_RX
USB_ON
USB_OVR
SYN_OUT
DD_ON
RC0
RC1
SYS_RST
TEL_ATT
BU_CHECK
(1/4)
MAIN BOARD
IC853
CONTROL
USB POWER
IC852
IC851
DC/DC CONVERTER
SONY BUS
IC601
LEVEL SHIFT
ACCESSORY
CHECK
ON/OFF SWITCH
DC/DC CONVERTER
DC/DC CONVERTER
Q854, 861
DC/DC CONVERTER
DC/DC CONVERTER
Q851, 852
INTERFACE
(BT3700U)
(BT3750U)
BUS CONTROL
IN
REMOTE
IN
J
4
B
16
6
9
11
D
15
H
L
10
K
3
5
12
C
F
1
E
8
G
14
A
2
13
I
7
Refer to page
28 on original
28 on original
service manual
(1/2)
SERVO
TO
BOARD
2-3. SCHEMATIC DIAGRAM - MAIN Board (1/4) -
(Page 7)
(Page 6)
(Page 8)
MEX-BT3700U/BT3750U
MEX-BT3700U/BT3750U
6
6
4
BOARD
MAIN
(4/4)
3
BOARD
MAIN
(1/4)
MAIN
(3/4)
BOARD
5
MAIN
BOARD
(4/4)
7
MAIN
BOARD
(3/4)
8
0
0
0
0
0
3.3
0
4.2
4.2
4.2
4.2
4.2
4.2
8.4
1.2
1.5
0
0.5
1.3
0
3.3
5
0
0
0
0
3.3
3.3
0
4.2
0
4.2
4.2
4.2
4.2
4.2
8.4
4.2
4.2
0
0
0
0
3.3
0
3.3
3.3
4.2
2.3
3.5
0
3.1
0
0.5
0
3.1
0
3.7
3.8
1.3
3.7
6.7
5.7
8
0
8
5.7
8
8
5.4
0.8
3
4.6
3.7
3
100
R815
100
R816
100
R817
100
R818
100
R819
100
R820
100
R821
100
R822
100
R823
100
R824
100k
R809
100k
R810
100k
R811
100k
R812
100k
R813
100
R805
100
R803
100
R806
100
R807
100
R808
LBAT54CLT1G
D802
RT1N141C-TP-1
Q802
LBAT54ALT1G
D801
10k
R801
0.1
C801
0.01
C803
0.01
C805
16V
47
C804
10V
100
C806
0.01
C807
1
2
3
3P
CN811
EXT_MIC_IN
A-GND
MIC_DETECT
4.7k
R825
1000p
C823
1k
R829
C826
4.7
2.2k
R832
0
R830
1000p
C828
2.2k
R831
4.7
C830
4.7k
R833
LRB751V-40T1G
D823
D820
MAZ8068GMLS0
8
7
6
5
4
3
2
1
NJM4580V(TE2)
IC813
8
7
6
5
4
3
2
1
NJM4580V(TE2)
IC814
RT1N141C-TP-1
Q823
0.047
C880
Q826
RT1N141C-TP-1
0
C809
1
2
2P
CN810
MIC_IN
A-GND
RT1P141C-TP-1
Q803
RT1P141C-TP-1
Q820
RT1P141C-TP-1
Q821
1k
R834
C822
1000p
0
R826
100k
R847
0
R849
1
C838
3.9k
R886
3.9k
R887
RT1N141C-TP-1
Q822
1
C840
100k
R884
0.1
C845
1
C847
22k
R880
22k
R881
0
R883
0
R882
RT1N141C-TP-1
Q824
RT1P141C-TP-1
Q825
0
R893
220k
R890
220k
R889
22k
R891
0.01
C882
0.01
C881
0.1
C883
1k
R892
RT1P141C-TP-1
Q827
0
R898
1
2
3
4
5
6
TS5A3159DCKR
IC812
NO
GND
NC
COM
V+
IN
C834
0.1
MAZ8120GMLS0
D821
0
R800
C899
1000p
1000p
C900
BT800
MIC_IN-
MIC_IN+
BT_INT-HF
BT_CVC
BT_PLAY
BT_STATUS0
BT_STATUS1
BT_STATUS2
BT_RESET
GND
VDD_3.3V
VDD_8.5V
A-GND
BT_AUDIO_L
A-GND
BT_AUDIO_R
BT_STATUS3
BT_MUTE
BT_FR
BT_FF
GND
BT_TEST1
BT_TEST2
BT_POW_ON
BT_OPRPOW
BT_MFUNC
C812
4.7
1k
R899
1k
R900
4.7
C829
5
4
3
2
1
TK11133CSCL-G
IC801
CONT
GND
NP
VOUT
VIN
C813
1000p
S
SSM3J05FU
Q862
0
R836
0
R835
0
R838
0
R837
MAZ8068GMLS0
D824
33
29
30
31
32
34
35
24
25
27
28
36
100k
R885
0.01
C22
1
C21
0
R19
VR1
33k
R10
GND_1
0.1
C24
68k
R6
L2
2.2uH
0
R17
0.1
C26
1
C14
VSM
1
C15
TU_RCH
0
R15
4.7k
R11
16V
47
C28
0.01
C20
32
31
30
29
28
27
1
2
3
4
5
6
26
25
24
7
8
9
23
22
21
20
10
11
12
19
18
17
13
14
15
16
TEF6607T/V4/S470,518
IC1
AMRFIN
AMRFDEC
FMIN2
FMIN1
GNDRF
VCC2
AMRFAGC
LOUT
ROUT
GNDAUD
AMIFAGC2
MPXIN
MPXOUT
RSSI
XTAL2
XTAL1
GNDD
SCL
SDA
VREF
VREGSUP
VCC1
GND
VCODEC
PLL
PLLREF
TEST
AMSELIN1
AMSELIN2
AMIFAGC1
AMSELOUT1
AMSELOUT2
0
R18
FB2
0
R5
560uH
L8
1000p
C1
0.47
C16
8.5V
I2C_SCK
0
R4
560uH
L7
0.1
C27
100
R13
470k
R2
2.2
C13
22
R12
0.1
C25
L6
FM MIX
1
2
3
4
6
0.01
C23
1000p
C5
FB4
33p
C8
3.3uH
L1
FB1
4MHz
X1
0
R16
0.01
C19
TU_LCH
0
R3
12p
C18
0.22
C12
I2C_SIO
0.1
C9
470k
R1
C6
15p
C29
330p
C32
10p
FB3
RDS_OUT
100
R14
0.1
C17
BT_FF
BT_FR
BT_MUTE
BT_ST3
BT_ST2
BT_ST1
BT_ST0
BT_PLAY
BT_CVC
BT_INT
BT_TE1
BT_TE2
BT_ON
BT_OP
BT_MF
BT_RST
BT_POW
BT_L
BT_R
MAIN BOARD (2/4)
MIC AMP
IC814
+3.3V REGULATOR
IC801
MIC AMP,
IC813
MIC INPUT SELECT
IC812
CENTER VOLTAGE
REGULATOR
G
V
V
G
MIC AMP
Q826, 827
B+ SWITCH
MUTING
Q802, 803
REGULATOR CONTROL
MIC AMP
INVERTER
Q820-822
B+ SWITCH
BT3750U: EA
BT3700U: US, CND/
BT3700U: US, CND/
BT3750U: EA
(BT3700U: US, CND/BT3750U: E, MX, IND)
PLL
BT3750U: E, MX, IND
BT3750U: EA
IC1
BT3750U: E, MX, IND
(CHASSIS)
(BT3700U: AEP, UK)
BT3700U: AEP, UK/
(ANTENNA IN)
J1
BT3700U: AEP, UK/
BT3700U: AEP, UK/
(CHASSIS)
J801
EXTERNAL
MICROPHONE
MIC801
J
4
B
16
6
9
11
D
15
H
10
17
3
5
12
C
F
18
1
E
8
G
14
A
2
13
I
7
13
12
11
10
9
8
7
6
5
4
3
2
1
14
15
16
17
18
19
20
21
22
23
24
25
26
TO
BT
BOARD
Refer to page
29 on original
29 on original
service manual
2-4. SCHEMATIC DIAGRAM - MAIN Board (2/4) -
(Page 8)
(Page 7)
(Page
8)
(Page 7)
(Page 5)
MEX-BT3700U/BT3750U
MEX-BT3700U/BT3750U
7
7
(1/4)
1
(2/4)
BOARD
7
MAIN
(4/4)
BOARD
6
MAIN
MAIN
BOARD
5
BOARD
MAIN
(2/4)
3.2
7
3.2
7
7
7
14.4
8.4
8.4
8.4
8.4
8.4
8.4
7
7
7
14.4
3.3
7
3.3
13.5
8.4
13.5
0 (3.3)
0 (6)
10.4
14.4
14.4
5
3.3
3.3
5
3.3
4.8
1.3
0
0
0
0
0
0
0
0
0
0
0
0
8.5
4.1
4.1
4.1
4.1
4.1
4.1
4.1
4.1
4.1
4.1
4.1
4.1
4.1
4.1
4.1
4.1
4.1
4.1
4.1
4.1
4.1
4.1
4.1
4.1
3.3
3.3
0
3.3
0
3.3
13.8
0
13.8
13.8
0
C905
1000p
6
0.22
C323
220
R493
LTC614TKFP8T146
Q484
1A4-A2
D305
0
R463
5
4
3
2
1
TK11133CSCL-G
IC502
CONT
GND
NP
VOUT
VIN
0.22
C702
100p
C474
0
R461
RT1N141C-TP-1
Q471
50V
10
C483
0.22
C312
0.01
C320
50V
1
C463
1SS355WTE-17
D470
LTC614TKFP8T146
Q482
10k
R479
2.2k
R106
100p
C473
10k
R484
0
R301
14
10k
R480
16
1SS355WTE-17
D502
40
13
16V
47
C476
1k
R702
1
C311
10V
1000
C326
0.22
C301
52
100p
C499
1
C455
38
4.7k
R309
54
50V
1
C458
220
R491
0.22
C703
50V
10
C484
TU_LCH
8
42
1k
R472
0.01
C316
16V
47
C315
50V
1
C464
0
R929
220
R494
22
R470
MC2838-T112-1
D472
0.22
C324
47p
C459
0
R302
LTC614TKFP8T146
Q485
50V
10
C480
RT1P141C-TP-1
Q490
0
R456
GND_1
220
R490
0
R464
1000p
C930
C519
1000p
100k
R500
TDA8588AJ/N2/R1
IC301
1
TAB
2
I2C_SIO
3
OUT-FL-
4
I2C_SCK
5
OUT-FL+
6
VP2
7
OUT-RL-
8
P-GND1
9
OUT-RL+
10
SVR
11
IN-RL
12
IN-FL
13
S-GND
14
IN-FR
15
IN-RR
16
BEEP
17
OUT-RR+
18
P-GND3
19
OUT-RR-
20
VP1
21
OUT-FR+
22
STB
23
OUT-FR-
24
P-GND4
25
DIAG
26
RST
27
ANT-REM
28
CRES
29
AMP-REM
30
AUDIO+B(8.5V)
31
SERVO-3.3V
32
GND
33
MECHA-6V
34
PANEL+B
35
VP
36
CBU
37
BU+B
4.7k
R701
1
C307
16V
10
C317
1A4-A2
D309
2
1
C456
220
R492
47k
R460
44
100p
C472
FB15
10k
R485
0.01
C327
36
250uH
L701
53
50V
1
C457
4
40
39
38
37
36
35
34
7
6
5
4
3
2
1
33
32
30
31
8
27
28
29
9
10
11
12
13
14
24
17
25
26
23
22
21
20
19
18
15
16
BD3447AFV-E2
IC401
BUS_RCH
BUS_LCH
TU_RCH
TU_LCH
CD_RCH
CD_LCH
AUX_RCH
AUX_GND
AUX_LCH
BT_RCH
NCO
BT_LCH
ZAP_BEEP
NCO
NCO
ZAP_BEEP
EBIAS
DS2_L
DS1_L
DS3_L
DS3_R
DS1_R
DS2_R
EBIAS
NCO
NCO
SA_CLK
SA_DA
SA_OUT
OUT_SLCH
OUT_SRCH
OUT_RLCH
OUT_RRCH
OUT_FLCH
OUT_FRCH
VCC(8.5V)
I2C_SCK
I2C_SIO
GND
FIL
10k
R483
50V
2.2
C100
43
RT1P141C-TP-1
Q470
15
49
16V
C322
47
1
C309
6.3V
330
C502
1k
R489
RT1P141C-TP-1
Q493
0.22
C313
1
C314
100p
C471
1A4-A2
D311
1k
R488
1SR154-400TE-25
D306
1
TU_RCH
1
C308
10k
R482
48
50V
10
C413
0.01
C325
46
2200p
C487
0
R469
8.5V
16V
10
C321
35
1A4-A2
D303
47p
C333
CN701
19P
FL+
RL+
RR+
FR+
AMP-R
ANT-R
ACC
GND
FL-
RL-
RR-
FR-
+B
TEL-ATT
ILL
TEST
+B
+B
+B
2.2
C334
1
C310
0
R468
47k
R305
1A4-A2
D310
MAZ8068GMLS0
D119
1A4-A2
D312
L1
R1
L2
R2
R3
L3
L
R
L
R
R
L
J901
6P
1
C305
0.1
C415
0
R304
LTC614TKFP8T146
Q480
51
0.1
C501
1.5k
R462
37
1
C460
0.01
C500
0.01
C318
1A4-A2
D307
2200p
C486
4
3
1
2
XC61CN2802NR
IC503
VOUT
VIN
NC
VSS
0.22
C302
1A4-A2
D308
11
9
1k
R473
MAZ8068GMLS0
D118
1
2
3
3P
CN410
SUB_OUT
GND
SUB_OUT
100p
C475
1SR154-400TE-25
D855
10k
R478
FB14
16V
3300
C701
1A4-A2
D301
7
1A4-A2
D302
1
C306
16V
100
C414
1A4-A2
D304
41
1N5404-C311-3
D701
10k
R506
150
R303
LTC614TKFP8T146
Q483
0.01
C503
1
C304
10
50V
10
C482
50V
10
C485
5
0
R457
0
R306
100p
C470
50V
22
C303
16V
10
C319
12
45
47
I2C_SCK
I2C_SIO
I2C_SCK
I2C_SIO
BT_R
BT_L
(3/4)
MAIN BOARD
IC401
ELECTRICAL VOLUME, INPUT SELECT
IC503
RESET SIGNAL GENERATOR
+3.3V REGULATOR
IC502
POWER AMP,
IC301
REGULATOR
(CHASSIS)
(MONO)
SUB OUT
J401
IN
BUS AUDIO
AUDIO OUT
REAR
AUDIO OUT
FRONT
MUTING
MUTING
Q482 – 485
MUTING CONTROL
MUTING CONTROL
MUTING CONTROL
Q470, 471
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
10A
32V
FU701
AEP, UK
BT3700U:
J
4
B
16
6
21
9
11
D
15
H
L
10
K
17
3
5
12
C
F
18
M
N
1
19
E
8
G
20
14
A
2
13
I
7
RL-
RL-
RL+
RL+
FL-
FL-
FL+
FL+
FR-
FR-
FR+
FR+
RR-
RR-
RR+
RR+
ATT
AMP REM
BATT
GND
MAX 0.3A
ACC
AMT REM
BATT
GND
FRONT LCH-
FRONT LCH+
REAR LCH+
REAR LCH-
REAR RCH+
REAR RCH-
FRONT RCH+
FRONT RCH-
ACC
GND
BATT
ATT
AMP REM
MAX0.3A
ACC
AMT REM
ANT REM
MAX0.1A
(BT3700U: AEP, UK)
(BT3700U: US, CND/BT3750U: E, EA, MX)
TO
CN701
TO
CN701
TO
CN701
TO
CN701
RL+
FL+
GND
GND
ACC
FR+
RR+
RL+
FL+
FR+
RR+
RL-
FL-
FR-
ILL
BATT
BATT
ACC
ILL
RR-
RL-
FL-
FR-
RR-
ATT
(BT3750U: IND (for Gasoline car))
AMP REM
MAX 0.3A
ANT REM
MAX 0.1A
ANT REM
MAX 0.1A
RL+
FL+
GND
GND
ACC
FR+
RR+
RL+
ACC
ANT REM
RR+
FL+
ILL
FR+
RL-
FL-
FR-
BATT
ILL
BATT
RR-
RR-
FL-
FR-
RL-
ATT
(BT3750U: IND (for Diesel car))
AMP REM
MAX 0.3A
ANT REM
2-5. SCHEMATIC DIAGRAM - MAIN Board (3/4) -
(Page 5)
(Page 6)
(Page 8)
(Page 6)
MEX-BT3700U/BT3750U
MEX-BT3700U/BT3750U
8
8
MAIN
8
BOARD
(3/4)
MAIN
BOARD
MAIN
BOARD
6
4
(2/4)
(2/4)
2
(1/4)
BOARD
MAIN
0
0
3.3
0
0
0
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
1.6
3.3
3.3
3.3
1.6
0
0
0
0
3.3
0
0.2
3.3
3.3
3.3
3.3
3.3
0
0
0
0
1.6
1.7
1.5
3.2
3.1
0.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
0
0
0
0
0
3.2
0
0
0
0
0
0
0
1.5
1.7
3.3
1.8
0
0
0
3.3
3.3
3.3
3.3
3.3
0
0
0
0.8
0.9
3.2
3.2
3.2
0
1.6
3.2
3.2
2.5
3.2
0.7
1.6
2.5
3.1
3.2
43
29
470
R104
100k
R590
100k
R520
JL051
MA2J1110GLS0
D114
I2C_SCK
1000p
C110
470
R536
R58
10k
470
R534
100k
R552
48
1
C101
JL045
4.7k
R519
C60
0.01
0.01
C515
FB566
470
R103
33
100k
R539
0
R60
100k
R571
10k
R59
100k
R522
16V
220
C112
100k
R578
1000p
C514
R543
100k
0
R412
100
R529
44
10k
R528
100
R533
R541
100k
1
C102
ISA1235AC1TP-1EF
Q52
C54
0.1
4700p
C104
470
R535
JL055
C52
15p
21
C59
0.1
JL054
0
R570
10uH
L110
27p
C505
R54
10
0
R567
4.7
C111
BAT54ALT1G
D400
C55
0.1
32.768kHz
X502
10k
R530
32
JL046
R50
0
31
R56
100k
46
0.01
C506
1
C507
100k
R551
38
100k
R521
100k
R504
100
R547
10k
R514
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
20P
CN101
GND
USB_VBUS
GND
USB_GND
KEY_GND
USB_D+
AUX_LCH
USB_D-
KEY1
AUX_RCH
RE1
AUX_GND
RE0
KEY0
LCD_CE
SIRCS
LCD_CLK
LCD_DATA
ILL+9V
PANEL(NOSE_SW)
18
MA2J1110GLS0
D111
JL050
100k
R558
4700p
C103
S101
RESET
53
R546
100k
100
R540
100
R557
7.92MHz
X501
100k
R565
23
C50
100p
R51
0
0.01
C510
FB105
0.01
C508
R55
10
MA2J1110GLS0
D112
100
R525
RDS_OUT
8.664MHz
X50
JL057
R542
100k
4.7k
R560
1000p
C512
0
R100
12k
R101
JL047
20
100k
R502
100
R515
R112
10
16V
C61
47
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
TDA7333013TR
IC50
VDDA
REF3
REF2
REF1
VSS
TM
VDDD
RESET
XTI
XTO
I2C_SCK
I2C_SIO
SA
CSN
INTN
MPX
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
IC501
MB90F883AHPF-G-102E1
BT_PLAY
BT_FR
BT_FF
BT_POWER_CTRL
BT_STATUS0
BT_STATUS1
BT_STATUS2
BT_STATUS3
XBT_RESET
BT_MFUNC
BT_OPRPOW
BT_STATUS_POW
X_OUT
X_IN
VCC
VSS
C
BT_TEST2
BT_TEST1
XNOSE_SW
XDOOR_SW
I2C_SIO
I2C_SCK
DOOR_IND
CYRIL_SEL
RE_IN0
RE_IN1
AREA_SEL2
AREA_SEL1
AREA_SEL0
B_OUT
_SEL
AVCC
AVRH
XRC_IN1
AVSS
SA_IN
VSM
TU_ATT
KEY_IN1
KEY_IN0
RC_IN0
XEXT_ATT_XEN
WAKE_UP
VSS
XKEY_ACK0
XKEY_ACK1
DAVN
LCD_CE
LCD_SO
LCD_SCK
XMD2
MD1
MD0
XRESET
UNISI
UNISO
UNSCK
RDS_ON
MC_RX
MC_TX
XTEST_IN
Z_MUTE
XILL_IN
ATT
VCC
VSS
BU_CHECK
AMP_STB
XDIAG
EJECT_OK
SA_OUT
SA_CLK
F_AUX
BT_ATT_XEN
VBUS_ON
XUSB_OVR
FLASH_EN0
FLASH_EN1
USB_ON
DD_ON
TEL_ATT
XACC_IN
XBUS_ON
CD_ON
CDM_ON
XSYS_RST
BT_MIC_POW
XBT_MIC_SEL
BT_MIC_DET
VCC
VSS
OSC_OUT
OSC_IN
BT_MUTE
SIRCS
BT_INT_HF
BT_CVC
ZAPPIN_BEEP
SYNC_OUT
BEEP
40
1000p
C509
1
2
3
3P
CN110
D+(USB)
D-(USB)
GND(USB)
42
100k
R517
100k
R537
C57
0.1
22
52
0
R568
100
R505
MAZ8180GMLS0
D102
17
30
37
C51
100p
41
470
R579
100k
R511
FB50
100
R513
100k
R526
330
R110
R57
1k
FB53
27p
C504
100k
R553
12k
R102
19
LRB751V-40T1G
D505
VSM
JL053
1000p
C511
100k
R538
4.7k
R556
MA2J1110GLS0
D113
10
R111
S502
I2C_SIO
D117
UDZS-TE17-6.8B
4.7k
R518
4.7k
R555
C58
0.1
100k
R550
0.01
C513
C53
15p
1000p
C105
FB52
C56
0.1
FB51
MAZ8068GMLS0
D120
100
R527
100p
C62
51
34
R503
100k
100k
R572
220k
R561
100
R531
10k
R532
0
R569
100k
R585
49
54
10k
R516
R544
100k
R559
100k
47
45
BT_MUTE
BT_INT
ACC_IN
BT_CVC
NOSE_SW
CDM_ON
MC_RX
UNISI
MC_TX
NOSE_SW
RE0
VSM
UNISCK
I2C_SIO
SIRCS
RE1
I2C_SCK
ILL_IN
SYN_OUT
CD_ON
TEL_ATT
UNISO
BT_ON
I2C_SCK
I2C_SIO
DAVN
DAVN
VSM
RDS_ON
USB_ON
DD_ON
USB_OVR
VBUS_ON
EJECT_OK
BU_CHECK
Z_MUTE
LCD_DATA
LCD_CE
LCD_CLK
WAKE_UP
RC0
RC1
KEY0
KEY1
BT_TE1
BT_FR
BT_ST2
BT_TE2
BT_POW
BT_RST
BT_ST1
BT_PLAY
BT_FF
BT_ST3
BT_ST0
BT_OP
BT_MF
SYS_RST
RE1
LCD_CLK
KEY1
SIRCS
LCD_CE
LCD_DATA
KEY0
RE0
LCD_+9V
BUS_ON
SYS_RST
LCD_+9V
RDS_ON
BT3750U
RDS DECODER
IC50
SYSTEM CONTROLLER
IC501
(4/4)
MAIN BOARD
B+ SWITCH
(CHASSIS)
(BT3700U: AEP, UK)
(BT3750U: E, MX, IND)
(BT3700U: US, CND)
BT3700U: US, CND/
BT3750U
BT3700U/
BT3750U: EA
(BT3750U)
(BT3700U)
(BT3700U: AEP, UK)
J
4
B
16
6
9
11
D
N
15
H
L
10
K
17
3
5
12
C
F
18
M
1
19
E
8
G
20
14
A
2
13
I
7
FREQUENCY
BT3700U: AEP, UK/
SELECT
9k
10k
Refer to page
31 on original
31 on original
service manual
Refer to page
33 on original
33 on original
service manual
A
BOARD
KEY
BOARD
(2/2)
SERVO
TO
CN901
2-6. SCHEMATIC DIAGRAM - MAIN Board (4/4) -
(Page
5)
(Page
6)
(Page 7)
(Page 6)
Click on the first or last page to see other MEX-BT3700U / MEX-BT3750U service manuals if exist.