Sony MEX-BT3700U / MEX-BT3750U Service Manual ▷ View online
SERVICE MANUAL
SUPPLEMENT-1
MEX-BT3700U/BT3750U
US Model
Canadian Model
AEP Model
UK Model
MEX-BT3700U
E Model
MEX-BT3750U
Ver. 1.1 2009.11
SUPPLEMENT-1
File this supplement with the service manual.
Subject: Change of MAIN board (Suffi x-12)
In this set, MAIN board has been changed in the midway of production.
Printed wiring board, schematic diagram and electrical parts list of new
type are described in this supplement-1.
Refer to original service manual for other information
Printed wiring board, schematic diagram and electrical parts list of new
type are described in this supplement-1.
Refer to original service manual for other information
1. NEW/FORMER DISCRIMINATION
– MAIN Board (Component Side) –
Former : 1-878-708-11
New :
New :
1-878-708-12
9-889-374-81
MEX-BT3700U/BT3750U
2
2. DIAGRAMS
For Schematic Diagrams.
Note:
• All capacitors are in
• All capacitors are in
μF unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in
Ω and
1
/
4
W or less unless otherwise
specifi ed.
• f
: internal component.
• C : panel designation.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
(In addition to this, the necessary note is printed in each block.)
• A : B+ Line.
• Power voltages is dc 14.4V and fed with regulated dc
• Power voltages is dc 14.4V and fed with regulated dc
power supply from ACC and BATT cords.
• Voltages are dc with respect to ground under no-signal
(detuned) conditions.
no mark : TUNER
( ) : CD PLAY
• Voltages are taken with a VOM (Input impedance 10 M
• Voltages are taken with a VOM (Input impedance 10 M
Ω).
Voltage variations may be noted due to normal production
tolerances.
• Signal path.
F :
F :
AUDIO
f :
TUNER
J
: CD PLAY
l : USB
N :
N :
MIC
E :
AUX
IN
a
: BUS AUDIO IN
• Abbreviation
CND : Canadian model
EA
CND : Canadian model
EA
: Saudi Arabia model
IND
: Indian model
MX
: Mexican model
For Printed Wiring Boards.
Note:
• X : Parts extracted from the component side.
• Y : Parts extracted from the conductor side.
• W : Indicates side identifi ed with part number.
• f
• X : Parts extracted from the component side.
• Y : Parts extracted from the conductor side.
• W : Indicates side identifi ed with part number.
• f
: Internal component.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Parts face side:
(Conductor Side)
Pattern face side:
(Component Side)
Parts face side:
(Conductor Side)
Pattern face side:
(Component Side)
Parts on the parts face side seen from
the pattern face are indicated.
Parts on the pattern face side seen
from the parts face are indicated.
the pattern face are indicated.
Parts on the pattern face side seen
from the parts face are indicated.
• Abbreviation
CND : Canadian model
EA
CND : Canadian model
EA
: Saudi Arabia model
IND
: Indian model
MX
: Mexican model
• Indication of transistor.
C
B
These are omitted.
E
Q
MEX-BT3700U/BT3750U
MEX-BT3700U/BT3750U
3
3
R400
R401
R403
R404
R406
R407
R408 R409
R600
FB50
FB51
R602
FB52
FB53
Q470
Q471
R412
C32
R413
R415
R800
Q862
R803
FB4
R611
R612
R613
R614
Q480
R615
R616
Q482
E
E
E
E
E
R617
Q483
R618
Q484
Q485
R815
R816
R817
R818
C50
Q490
C51
R819
C52
C53
Q493
C54
C55
C56
C57
R820
IC50
C58
R821
C59
R822
C400
C60
C405
C62
C406
CN810
R830
R831
R834
R837
R838
R456
R457
C611
C809
R847
R460
R461
R462
R463
R464
R470
R478
R479
C828
C829
C830
Q52
C834
R488
R489
C838
R490
C455
R491
C456
R492
R493
C840
R494
C459
R880
C845
R881
R882
C847
R883
R884
D400
C460
R885
R886
R887
R889
D600
R890
D601
R891
R892
R893
R894
Q701
Q703
R898
R899
D611
D612
IC401
IC601
C880
C881
C499
C882
C883
FB105
IC812
IC813
R100
IC814
R101
R102
R103
R104
C899
R106
R304
R305
R111
R306
R112
R309
R500
R502
R503
R504
R505
R506
D470
R702
D472
R704
R705
R511
R706
R513
CN110
R514
R709
R515
R516
R517
R518
R519
R710
R711
R713
R714
R520
R521
R522
C101
R525
C102
R526
C103
R527
C104
R528
C105
R529
R530
R531
R532
R533
C304
R534
C305
R535
C306
R536
C307
R537
C308
R538
C309
R539
C500
C501
C503
C310
R540
C311
R541
C506
R542
C507
R543
C508
R544
C509
C316
R546
C318
C702
C703
R17
C704
C510
R18
C705
C511
R19
C512
C707
C513
C708
C514
R550
C709
C515
R551
R552
C323
R553
C900
C519
C325
R555
R556
R557
R557
C710
R558
R560
R561
R565
R567
R6
R571
R572
R578
R50
R51
D102
R54
R55
R56
R58
R59
R590
D111
D112
D113
D114
D117
D118
D119
D502
Q600
D505
D120
L400
L401
D702
D703
D704
D705
IC501
IC502
IC503
Q820
Q821
Q822
Q823
Q824
Q825
Q826
Q827
C14
C15
BE
B E
B E B E
8
9
16
1
1
1
2
B E
B
E
B E
21
20
40
1
1
7
81
4
1
3
B
E
E
B
E
1
100
30
31
81
80
50
51
BE
BE
BE
BE
B E
B E
B
E
E
6
1
3
3
4
B E
1
2
3
4
1
3
3
4
5
1
4
4
5
8
1
4
5
8
K
A
K
A A
K
1-878-708-
12
MAIN BOARD
(COMPONENT SIDE)
MIC801
(BT3700U: US, CND/BT3750U: E, MX, IND)
(BT3700U: US, CND/BT3750U: E, MX, IND)
(BT3700U: AEP, UK/BT3750U: EA)
(BT3700U)
(BT3750U)
(BT3700U: US, CND)
(BT3700U/BT3750U: EA)
(BT3700U: AEP, UK)
(BT3700U: AEP, UK/BT3750U)
(BT3750U)
(BT3700U)
(BT3700U: US, CND/BT3750U)
(BT3700U: AEP, UK)
SERVO BOARD
(1/2)
A
B
C
D
E
F
G
H
I
1
2
3
4
5
6
7
8
9
2-1. PRINTED WIRING BOARD - MAIN Board (Component Side) -
•
: Uses unleaded solder.
MEX-BT3700U/BT3750U
MEX-BT3700U/BT3750U
4
4
C20
C21
C22
C23
C24
C25
C26
C27
FB418
FB419
C29
Q851
Q852
Q853
Q854
FB420
R414
R416
R801
FB1
Q861
FB2
FB3
R610
R805
R806
R807
R808
R809
R810
R811
R812
R810
R811
R812
R813
R823
R824
R825
R826
C402
R829
JL001
JL003
JL004
C408
JL005
JL007
JL008
JL009
R832
R833
R835
R836
JL010
JL011
C415
JL012
JL013
JL014
C801
JL015
JL016
C803
JL017
C610
JL018
C805
JL019
C807
JL020
JL021
R849
JL022
JL023
JL024
JL025
C812
C813
JL027
JL028
R468
R851
R469
R852
R855
R856
R858
R472
R473
C822
C823
R860
C1
R861
C826
R862
R863
R864
C5
R865
C6
R866
R867
C8
R868
R480
C9
R869
R482
R483
R484
JL045
R485
JL046
JL047
R870
R871
R872
R873
R874
JL050
JL051
JL052
JL053
JL054
JL055
JL056
JL057
C850
C851
C853
C854
C855
C856
C857
C858
C858
C470
C859
C471
C472
C473
C474
C475
D801
C861
D802
D610
C864
C865
C869
C486
C487
C870
C871
C871
D820
D824
D821
IC801
D823
R301
R302
R303
D851
D852
D853
D854
D855
R900
R712
IC851
IC852
IC853
C301
C302
C110
C111
IC1
C504
C505
R929
C312
C313
R10
C314
R11
R12
R13
R547
R14
R15
R16
C320
C324
FB566
C327
C905
R559
C333
C334
R568
R569
R1
R2
R3
R4
R5
R570
C924
R579
VR1
C930
R585
R57
R60
D306
FU851
Q802
Q803
W1
W2
FB14
FB15
C12
C13
C16
C17
C18
C19
J701
CNJ600
L701
L851
L852
C600
TH600
C804
C806
C852
C863
C476
R701
CN701
C303
C701
C319
D301
D302
D303
D304
D305
D307 D308
D309
D310
PL02
PL01
D311
D312
D701
J901
J1
L2
L6
IC301
CN410
C413
C414
C457
C458
C463
C464
C480
C482
C483
C484
C485
L7
L8
C315
C317
C321
C322
C326
1
13
26
14
BT800
S101
CN811
L110
R110
C112
X501
X502
C401
C403
C407
C502
CN350
CN101
C28
C61
L1
C100
S502
X50
X1
G
S
D
D
D
D
D
D
G
S
D
D
D
D
G
S
D
D
1
16
17
32
1
4
5
8
1
4
5
8
1
4
5
8
1
3
4
5
5
4
6
1
3
7
8
11
18
19
17
16
8
9
1
10
9
1
37
2
36
1
3
1
3
1
3
B1
A1
A14
B14
9 k
10 k
(FREQUENCY SELECT)
(ANTENNA IN)
FU701
A
KEY BOARD
CN901
K
K
K
A
A
A
1-878-708-
12
MAIN BOARD
(CONDUCTOR SIDE)
(BT3700U: US, CND/BT3750U: E, MX, IND)
(BT3750U: E, MX, IND)
(BT3700U: AEP, UK/BT3750U: EA)
(BT3700U: AEP, UK)
(BT3700U: AEP, UK)
(BT3700U: AEP, UK)
(BT3700U: US, CND/BT3750U: E, MX, IND)
(BT3700U: AEP, UK/BT3750U: EA)
(BT3700U: US, CND/BT3750U: E, MX, IND)
(BT3700U: AEP, UK/BT3750U: EA)
L
R
FRONT AUDIO
OUT
L
R
L
R
BUS AUDIO
IN
SUB OUT
(MONO)
J401
REAR AUDIO
OUT
1
2
19
20
RESET
1
3
EXTERNAL
MICROPHONE
J801
E
E
E
E
1
9
WHT/BLK
WHT
GRN/BLK
GRN
VIO/BLK
VIO
GRY/BLK
GRY
WHT
GRN/BLK
GRN
VIO/BLK
VIO
GRY/BLK
GRY
BLU
RED
YEL
BLK
YEL
BLK
FRONT LCH (–)
FRONT LCH (+)
REAR LCH (–)
REAR LCH (+)
REAR RCH (–)
REAR RCH (+)
FRONT RCH (–)
FRONT RCH (+)
FRONT LCH (+)
REAR LCH (–)
REAR LCH (+)
REAR RCH (–)
REAR RCH (+)
FRONT RCH (–)
FRONT RCH (+)
ANT REM MAX 0.1A
ACC
BATT
GND
BATT
GND
2
10
3
11
4
12
5
13
6
14
7
15
8
16
1
1
9
WHT/BLK
GRN/BLK
VIO/BLK
GRY/BLK
GRN/BLK
VIO/BLK
GRY/BLK
WHT
GRN
VIO
GRY
BLU
RED
BLK
2
2
10
3
3
11
4
4
12
5
5
13
6
6
14
7
7
15
8
8
1
2
3
4
5
6
7
8
16
RL+
RL–
GRN/BLK
WHT/BLK
GRY/BLK
VIO/BLK
WHT/BLK
GRY/BLK
VIO/BLK
GRN
WHT
GRY
VIO
FL+
FL–
FR+
FR–
RR+
RR–
ACC GND
BLK
YEL
RED
BLU
ANT
REM
NC
NC
BATT
NC
NC
TO
CN701
(BT3700U: AEP, UK)
(BT3700U: US, CND/BT3750U: E, EA, MX)
YEL
ATT
ATT
ATT
AMP REM
MAX 0.3 A
MAX 0.3 A
LIGHT BLU
BLU / WHT
ATT
AMP REM
AMP REM
MAX 0.3 A
LIGHT BLU
BLU / WHT
(BT3750U: IND (for Gasoline car))
(BT3750U: IND (for Diesel car))
4
3
2
1
12
11
10
9
RL+ RL–
GRN
GRN
GRN/BLK
GRN/BLK
WHT/BLK
WHT/BLK
GRY/BLK
VIO/BLK
GRN/BLK
RED
ORG/WHT
YEL
WHT
WHT
GRY
GRY
VIO
BLK
VIO/BLK
VIO
FL+
FL–
FR+ FR–
RR+ RR–
7
6
5
15
14
13
BLU/WHT
BLU
RED
ACC
8
16
YEL
BLK
GND BATT
AMP REM
MAX 0.3A
ANT REM
MAX 0.1A
MAX 0.3A
ANT REM
MAX 0.1A
ANT REM
4
3
2
1
12
11
10
9
RL+ RL–
GRN
YEL
GRN/BLK
VIO/BLK
GRY/BLK
WHT/BLK
GRN/BLK
WHT/BLK
GRY/BLK
VIO/BLK
BLK
WHT
RED
GRY
BLU
VIO
VIO
GRN
GRY
WHT
GRY
WHT
FL+
FL–
FR+ FR–
RR+ RR–
ORG/WHT
SKY BLU
SKY BLU
ORG/WHT
7
6
5
15
14
13
BLU/WHT
BLU
RED
ACC
8
16
YEL
BLK
GND BATT
ORG/WHT
AMP REM
MAX 0.3A
MAX 0.3A
1
2
3
7
8
4
5
6
(FRONT VIEW)
BUS
CONTROL IN
REMOTE
IN
(BT3700U: AEP, UK)
A
B
C
D
E
F
G
H
I
1
2
3
4
5
6
7
8
9
10
11
12
Refer to page
TO
SERVO BOARD
27 on original
service manual
C860
Refer to page
32 on original
32 on original
service manual
Refer to page
TO BT BOARD
27 on original
service manual
2-2. PRINTED WIRING BOARD - MAIN Board (Conductor Side) -
•
: Uses unleaded solder.