Sony MEX-BT3900U / MEX-BT3950U / MEX-BT39UW Service Manual ▷ View online
MEX-BT39UW/BT3900U/BT3950U
MEX-BT39UW/BT3900U/BT3950U
25
25
1
MAIN BOARD
(2/3)
MAIN
(3/3)
BOARD
2
IC B/D
IC B/D
IC B/D
1.3
3.3
3.1
7.2
3.1
7.1
14.4
7.2
7.2
4.4
4.1
4.1
4.1
4.1
4.3
7.1
7.1
14.4
7.1
3.2
7.2
3.2
13.9
13.9
8.5
3.3
6.1
10.5
14.4
14.1
4.9
0.6
14.4
0
5.4
0
3.1
4.9
3.3
0
3.2
2.7
1.6
1.5
3.3
0
14
13.7
13.7
0
4.9
4.9
5.4
2.7
0
0
0.6
0
4.9
0
5.4
0
2.5
3300
12
A
6
B
8
E
14
15
9
4
3
F
D
H
7
2
10
I
G
11
C
5
13
1
MAIN BOARD (1/3)
IC403
IC402
IC301
1000p
C328
0.22
C301
1A4-A2
D317
1
C321
1A4-A2
D321
16V
C336
R319
10k
1000p
C335
2.2
C315
1
C319
0.22
C305
1
C322
1
C324
25V
22
C303
1A4-A2
D310
16V
C312
10
47k
R315
1
C318
0.1
C337
1000p
C334
4.7k
R316
0.47
C333
1
C316
0.22
C330
1
C263
1A4-A2
D302
1A4-A2
D304
0.22
C302
1
C320
1
C323
1A4-A2
D316
1A4-A2
D31
1
0.47
C300
1A4-A2
D312
0.22
C308
1A4-A2
D303
CN301
16P
1
FL+
2
RL+
3
RR+
4
FR+
5
AMP-REM
6
ANT-REM
7
ACC
8
GND
9
FL-
10
RL-
11
RR-
12
FR-
16
+B
13
TEL-ATT
14
ILL
15
TEST
17
+B
18
+B
19
+B
150
R308
0.22
C329
1A4-A2
D306
1A4-A2
D314
1A4-A2
D313
R320
47k
0.47
C332
1
C306
0.22
C304
1A4-A2
D315
R318
10k
S401
16V
47
C416
DA2J10100L
D401
10V
1000
C409
0.1
C407
C445
1000p
22
R429
100k
R401
PST8228UL
IC403
RESET SIGNAL GENERATOR
VOUT
VIN
NC
VSS
5
4
3
4
3
2
1
1
2
TK11133CSCL-G
IC402
+3.3V REG
CONT
GND
NOISE
VOUT
VIN
0
FB401
0.1
C402
0.1
C401
R862
220k
R858
220k
R815
1k (BT3900U: AEP, RU, UK/BT3950U)
15k (BT39UW/BT3900U: US, CND)
D806
RKZ7.5B2KGP1
RKZ6.2B2KGP1
(BT3900U: AEP, RU, UK/BT3950U)
(BT39UW/BT3900U: US, CND)
1k
R816
4.7k
R325
DA2J10100L
D404
R321
1k
220
R303
220
R304
DA2J10100L
D403
47k
R317
220
R305
220
R306
1A4-A2
D324
1A4-A2
D318
DRC5114E0L
Q802
BACK-UP CHECK
DRC5114E0L
Q409
MUTE DRIVE
RT1P141M-TP-1
Q407
MUTE DRIVE
100
R301
100
R302
2SC4154TP-1EF
Q301
ACC DETECT
2SC4154TP-1EF
Q808
BACK-UP CHECK
(BT3900U: AEP, RU, UK/BT3950U)
RKZ18B2KGP1
D807
RKZ18B2KGP1
D322
RKZ18B2KGP1
D320
47k
R310
47p
C327
6.3V
330
C41
1
DRC5144E0L
Q807
BACK-UP CHECK
2SC4154TP-1EF
Q303
TEL-ATT DETECT
RKZ18B2KGP1
D323
RKZ18B2KGP1
D301
6.3V
C403
330
L301
1
2
10V
100
C447
IC301
1
TA
B
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
SER
VO+3.3V
32
GND
33
MECHA+6V
34
PANEL+B
35
VP
36
CBU
37
BU+B
16V
47
C313
L302
0
1
2
4
3
5
6
7
8
BUS1
BUS2
BUS3
BUS4
11
12
13
14
15
16
17
JC363
0
ACC
BEEP
STB
DIAG
RESET
I2C_SIO
I2C_SCK
ILL+B
BU_IN
TEL
RESET
FU601
10A
TDF8556AJ/N3 (EXCEPT BT3900U: AEP, UK)
TDF8556AJ/N3/M5 (BT3900U: AEP, UK)
I2C BUS CONTROLLED
POWER AMP/MULTIPLE
VOLTAGE REGULATOR
(BT3900U: AEP, UK)
R804
1k
14
13
12
11
10
9
8
7
6
5
4
3
2
1
BA8271F-E2
IC801
BUS_ON
RST
BA
TT
CLK
VREF
DA
TA_I/O
GND
DA
TA_OUT
DA
TA_IN
BU_CHECK
CLK_IN
BUS_IN
RST
VCC
R809
330k
R813
100
TH801
R808
0
R805
1k
RKZ18B2KGP1
D802
C809
0.1
8P
CN801
(BT39UW/BT3900U: US, CND)
7
8
4
5
6
9
10
11
G
G
G
1
2
3
R807
330k
25V
C802
470
C801
0.01
R812
0
R810
0
R81
1
0
LRB751V-40T1G
D801
R806
100
RKZ18B2KGP1
D803
RKZ18B2KGP1
D804
SYS_RST
UNI_SCK
UNI_SO
UNI_SI
BUS_ON
BU_IN
BUS INTERFACE
IC801
BUS
CONTROL IN
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
(BT3900U: AEP, RU, UK)
(EXCEPT BT3900U: AEP, RU, UK)
TO
CN301
TO
CN301
J801
FB826
FB802
FB801
REMOTE IN
RCIN0
RCIN1
5-5. SCHEMATIC DIAGRAM - MAIN Section (1/3) -
• See page 30 for IC Block Diagrams.
(Page 27)
(Page 26)
MEX-BT39UW/BT3900U/BT3950U
MEX-BT39UW/BT3900U/BT3950U
26
26
(3/3)
BOARD
MAIN
3
1
(1/3)
MAIN BOARD
BOARD
4
MAIN
(3/3)
1
2
IC B/D
3.3
0
3
14.4
6.3
14.4
5.2
5.2
0.7
0.8
0.8
5.1
5.1
14.4
0.6
1.1
3.3
3
5.1
5.1
3.2
0
0
0
3.3
3.3
3.2
3.2
3.2
3.2
3.2
3.2
3.2
3.3
3.3
3.3
3.3
0
0
3
3
3.3
3.3
0
0
0
0
0
3
3.3
3.3
0
3.3
3.2
0
0
0
3
3.3
3.2
2.6
2.6
3
0
1.6
0
0
0
0
3.3
3.2
3.2
0
1.6
0
0
0
0
3.3
3.2
3.2
0
0
0
0
0
0
0
3.3
0
3.7
1.6
1.5
3.2
0
0.3
1.4
3.1
1.7
0.7
3.3
3
3
2.7
3.3
0
3.2
3.3
1.1
0
3.1
3.1
MAIN BOARD (2/3)
IC601
IC501
1
C510
100k
R561
100k
R528
0
R509
1k
R510
100k
R553
100k
R554
1k
R512
470
R570
100k
R519
100k
R513
100k
R532
10k
R536
(BT3900U: AEP, RU, UK/BT3950U)
(BT39UW/BT3900U: US, CND)
100k
R533
10M
R501
220k
R508
18p
C508
22p
C507
100
R540
100k
R514
0.01
C513
1000p
C502
100
R539
0.5%
10k
R530
100
R503
0.5%
10k
R505
100
R502
0.5%
10k
R504
1000p
C512
1000p
C514
0.01
C523
0.01
C522
R507
R573
R538
R537
R549
R551
R550
100k
100k
100k
100k
R574
R552
100k
100k
0.22
C504
10k
R534
100k
R531
100k
R584
1k
R591
100
R213
100
R216
1k
R585
10k
R535
10k
R589
100k
R215
100k
R217
100k
R214
0
R517
100k
R567
0
R516
2.2k
R522
2.2k
R521
47p
C521
47p
C520
R577
(BT39UW)
(BT3950U)
100k
7.92MHz
X501
100k
R571
R560
100k
R562
100k
CL001
CL002
CL004
CL003
0
R542
0
R543
0
R555
0
R529
R581
1M
R583
100k
100k
R587
100
R598
100k
R590
100k
R597
100k
R564
10k
R500
100k
R596
100
R544
R588
100k
100
R592
100
R593
100k
R568
BT3900U
BT39UW/
16V
C615
100
470
R611
10uH
L602
18k
R607
C604
4.7
0.1
C609
3.3k
R604
C603
150p
1
C61
1
16V
100
C600
0.047
C602
C612
10V
470
3.3k
R610
C605
0.1
IC601
BD9070FP-E2
USB VBUS POWER SUPPLY
1
VREGB
2
VIN
3
NCO
4
NCO
5
PGND
6
GND
7
RT
8
SYN/EN
9
HSDCTL
10
FLG
11
NCO
12
HSDSW
13
HSDSW
19
FB
14
NCO
15
VDD
16
VDD
17
OVP
18
INV
20
NCO
21
SW
22
SW
23
NCO
24
PV_IN
25
PV_IN
26
TA
B
27
TA
B
25V
100
C614
MA24D5000BS0
D601
R702
0
0.01
C704
100
R707
R710
100
R713
100k
R705
0
16V
10
C703
R708
0
BAT54ALT1G
D731
0
R701
0.01
C710
FB501
R566
100k
10V
100
C701
0
R716
470
R602
47uH
L601
0.033
C606
0.01
C711
28P
CN701
14 DR_6V
13 DR_GND
12 RXD
11 TXD
10 NC
13 DR_GND
12 RXD
11 TXD
10 NC
9
CDM_ON
8
CD_ON
7
VBUS_ON
6
Z_MUTE
5
A_ATT
4
BU_3.3V
3
BU_GND
2
USB_GND
28
A_GND
27
VDD_3.3V
26
D_GND
25
NC
24
SP_DATA
23
SP_CLK
22
OPEN_REQ
21
EJECK_OK
20
X_FLASH
19
SYS_RST
18
WAKEUP
17
BU_CHECK
16
USB_GND
1
USB_D+
15
USB_D-
1000p
C518
100k
R565
R709
100k
L603
47uH
100k
R595
100k
R594
0.5%
820
R608
0.5%
2.2k
R603
2.2k
R609
0.5%
1
C613
47k
R601
C607
1
470
R605
470
R606
R525
100k
100k
100k
100k
470
R511
32.768kHz
X502
JL001
JL002
JL007
100k
R572
100k
R506
100k
R524
100k
R575
IC501
R5F3650KBDZ95FA
SYSTEM CONTROLLER
1
LCD_SO
2
LCD_CLK
3
NOSE_SW
4
SIRCS
5
UNISO
6
UNISI
7
UNISCK
8
BYTE
9
CNVSS
10
XIN
11
XOUT
12
RESET
13
OSCOUT
14
VSS
15
OSCIN
16
VCC1
17
NMI
18
RC_IN1
19
BUIN
20
SYSRST
21
BUS_ON
22
MC_RX
23
NCO
24
MC_TX
25
NCO
26
SYNC_OUT
27
NCO
28
BEEP
29
I2C_SCK
30
I2C_SIO
31
FW_TXD
32
FW_RXD
33
FW_CLK
34
FW_BUSY
35
NCO
36
NCO
37
CD_ON
38
CDM_ON
39
WAKE_UP
40
Z_MUTE
41
EPM
42
MODELNAME_SEL0
43
MODELNAME_SEL1
44
MODELNAME_SEL2
45
MODELNAME_SEL3
46
CE
47
NCO
48
SA_DATAIN
49
SA_CLKOUT
50
USBON
51
VBUS_ON
52
USB_OVR
53
EXT
ATT_XEN
54
NCO
55
NCO
56
TELA
TT
57
ACC_IN
58
AT
T
59
DIAG
60
AMPSTB
61
CYRIL_SEL
62
VCC2
63
NCO
64
VSS
65
ILLUMI SEL
66
COLSW SEL
67
BT_MUTE
68
B-OUT
SEL
69
AREASEL3
70
AREASEL2
71
AREASEL1
72
AREASEL0
73
R/S SW SEL
74
NCO
75
NCO
76
INITCOL_SEL
77
BT_TX
78
BT_RX
79
DEBUG_1
80
DEBUG_2
81 RE-IN1
82 RE-IN0
83 NCO
84 BT_RTS
85 BT_CTS
86 BT_RESET
87 BT_POWER
88 BT_MIC_DET
89 NCO
90 NCO
91 KEYACK0
92 KEYACK1
93 NCO
94 KEYIN1
95 KEYIN0
96 AVSS
97 RC_IN0
98 AVRH
99 AVDD
82 RE-IN0
83 NCO
84 BT_RTS
85 BT_CTS
86 BT_RESET
87 BT_POWER
88 BT_MIC_DET
89 NCO
90 NCO
91 KEYACK0
92 KEYACK1
93 NCO
94 KEYIN1
95 KEYIN0
96 AVSS
97 RC_IN0
98 AVRH
99 AVDD
100 LCD_CE
CL006
CL007
CL008
CL009
CL010
CL011
CL012
CL013
CL014
CL015
CL016
CL017
CL018
CL019
CL020
CL021
CL041
CL024
CL025
CL031
CL040
CL026
CL028
CL022
CL027
CL029
CL023
CL030
JL008
RKZ6.8B2KGP1
D501
0
R563
100
R580
100
R711
0
R865
1k
R866
4.7k
R867
FB704
FB705
FB706
FB706
1
2
4
3
5
6
7
8
BUS1
BUS2
BUS3
BUS4
18
19
20
21
22
BUS5
BUS8
BUS8
BUS7
BUS6
BEEP
RESET
VBUS_ON
MC_TX
MC_RX
SYS_RST
BU_IN
BUS_ON
USB_OVER
USB_ON
SYNC_OUT
CD_ON
CDM_ON
WAKE_UP
Z_MUTE
SA_DA
SA_CLK
LCD_CLK
VBUS_ON
CDM_ON
MC_TX
CD_ON
Z_MUTE
A_ATT
A_ATT
SYNC_OUT
STB
BT_MUTE
SIRCS
UNI_SI
UNI_SO
ACC
DIAG
USB_ON
LCD_DA
TA
MC_RX
USB_D+
EJECT_OK
RCIN1
RE1
SYS_RST
USB_D-
BU_IN
WAKE_UP
EJECT_OK
SA_CLK
SA_DA
NOSE_SW
UNI_SCK
I2C_SCK
I2C_SIO
I2C_SCK
RESET
USB_OVER
RE0
I2C_SIO
TEL
A_A
TT
KEY1
KEY0
KEY0
RCIN0
LCD_CE
MG-101P-188//Q
CD MECHANISM DECK
(2/2)
SERVO BOARD
12
A
6
B
8
E
14
9
4
3
F
D
H
7
2
10
I
G
11
C
5
13
1
BT3950U
BT3900U/
BT_POWER
BT_RESET
BT_CTS
BT_RTS
BT_MIC_DET
BT_TX
100
R212
(EXCEPT BT3900U: AEP, RU, UK)
(BT39UW/BT3900U: US, CND)
(BT3950U: EA)
(EXCEPT BT3950U: EA)
(EXCEPT BT3900U: AEP, RU, UK)
(BT3900U: AEP, RU, UK/BT3950U)
(BT3950U)
BT3900U
BT39UW/
BT_RX
100
R211
100k
R210
100k
R526
100k
R558
AEP, RU, UK
BT3900U:
BOARD
SWITCH
JL005
JL006
JL003
JL004
JL006
JL003
JL004
5-6. SCHEMATIC DIAGRAM - MAIN Section (2/3) -
• See page 23 for Waveforms. • See page 30 for IC Block Diagrams. • See page 33 for IC Pin Function Description.
(Page 25)
(Page 27)
(Page 27)
Note 1: When SERVO board is detective, exchange
the complete mounted board.
Note 2: When SWITCH board is detective, exchange
the MECHANICAL BLOCK ASSY (P).
MEX-BT39UW/BT3900U/BT3950U
MEX-BT39UW/BT3900U/BT3950U
27
27
BOARD
A
CN901
KEY
(1/3)
BOARD
MAIN
2
(2/3)
BOARD
MAIN
3
3
IC B/D
IC B/D
IC B/D
4
MAIN
(2/3)
BOARD
0
0
0
0
0
0
0
0
0
0
0
0
0(1.3)
8.5(6.8)
0(4.2)
8.5(6.8)
3.1(2.9)
1.1(2.9)
3.1(2.9)
0(1.2)
0(1.2)
8.5
0(1.7)
2.2
3.8
3.7
3.8
5.6
0.3(1.9)
8.5
3(3.6)
7.1
3.9(5)
3.4
3.1(3.3)
6.2
3.1(3.3)
6.2
3.9
3.9
3.9
3.6
3.6
3.6
3.6
3.6
3.9
3.6
3.6
3.6
3.9
3.2
3.9
3.6
3.2
3.6
3.9
8.5
3.6
3.1
3.1
8.4
3.9
3.6
3.6
3.6
0
3.3
0
3.3
3.3
3.3
0
3.3
0
3.3
0
0
3.3
8.5
8.5
1.3
MAIN BOARD (3/3)
IC401
IC001
50V
C410 10
BD3467FV-E2
IC401
ELECTRONIC VOLUME
BUS_LCH
BUS_RCH
TU_LCH
TU_RCH
AUX_LCH
AUX_GND
AUX_RCH
DP1
DN
DP2
EP1
EN
EP2
FP1
FN1
FN2
FP2
NCO
NCO
NCO
MUTE
I2C_SCK
I2C_SIO
GND
FIL
VCC(8.5V)
AU_OUT_RCH
AU_OUT_LCH
NCO
AU_IN_SUB
AU_IN_RL
AU_IN_RR
AU_IN_FL
AU_IN_FR
AU_OUT_FR
AU_OUT_FL
AU_OUT_RR
AU_OUT_RL
AU_OUT_SR
AU_OUT_SL
FB403
100p
C423
50V
10
C422
50V
10
C425
220
R404
R402
220
100p
C412
100p
C430
10k
R413
10k
R426
100p
C428
220
R423
10k
R411
R403 10k
100p
C426
0.1
C414
10k
R405
50V
10
C420
100p
C421
220
R410
FB402
10k
R424
470
R415
2.2k
R419
C158
1000p
1000p
C442
12k
R418
0
R420
470
R416
CAM003
1
C436
1
C427
1
C429
(BT39UW/BT3900U: US, CND)
1
C437
1
LCH_P
LCH_N
RCH_N
RCH_P
C431
1
C432
1
C434
1
C435
C443
1
C444
1
0
L402
10k
R438
50V
10
C419
0
R432
0
R431
0
R430
C100
0.1
50V
10
C413
10k
R422
10k
R409
50V
10
C424
0
R116
0
R435
0
R436
R406
0
12k
R417
RTAN140M-T111-1
Q401
MUTE
RTAN140M-T111-1
Q402
MUTE
RTAN140M-T111-1
Q403
MUTE
RTAN140M-T111-1
Q404
MUTE
RTAN140M-T111-1
Q405
MUTE
RTAN140M-T111-1
Q406
MUTE
50V
2.2
C417
50V
2.2
C418
0
R441
1
C438
220
R407
220
R421
D117
D118
C101
1000p
C203
0.47
D1
10
RKZ6.8B2KGP1
D108
RKZ6.8B2KGP1
D107
RKZ6.8B2KGP1
D106
RKZ6.8B2KGP1
D105
RKZ6.8B2KGP1
RKZ6.8B2KGP1
D104
RKZ6.8B2KGP1
D103
RKZ6.8B2KGP1
D102
RKZ6.8B2KGP1
D101
RKZ18B2KGP1
D109
RKZ6.8B2KGP1
D116
0
R434
0
R433
16V
220
C415
1
2
3
4
5
6
7
8
9
10
11
12
13
13P
CN402
AU_GND
AU_IN_RCH
AU_GND
AU_IN_LCH
AU_GND
AU-SUB_CH
AU_GND
AU_RL_CH
AU_FL_CH
AU_GND
AU_GND
AU_FR_CH
AU_RR_CH
20P
CN102
1
USB_GND
2
USB_VBUS
3
D-
4
D+
5
GND
6
KEY_GND
7
AUX_L
8
AUX_R
9
AUX_GND
10
RE_0
11
RE_1
12
KEY_1
13
KEY_0
14
SIRCS
15
LCD_DATA
16
LCD_CE
17
LCD_CLK
18
ILL(FP+B)
19
PANEL_SW
20
GND
D119
RKZ6.8B2KGP1
C103
0.1
0
R122
0
R121
L405
0
R13
100
J1
JW126
R15
FB1
FB2
FB3
0
JW102
16V
47
C28
2.2
C13
3.3uH
L1
JW148
4.7k
R11
33p
C8
470k
R2
0.1
C26
1000p
C5
4MHz
X1
JW147
15p
C6
470k
R1
0.01
C22
0.1
C24
R16
R3 0
0
560uH
L7
1000p
C1
L2
2.2uH
JW138
0.47
C16
0.1
C9
0.22
C12
1
C21
L6
FM MIX
1
2
3
4
6
0.01
C20
0.1
C25
12p
C18
R14
100
JW137
VR1
22
R12
TEF6617T/V1/S470, 518 (EXCEPT BT3900U: AEP, UK)
IC001
TEF6617T/V1/S470/M5, 518 (BT3900U: AEP, UK)
PHASE LOCKED LOOP(PLL)
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
0.1
C17
560uH
L8
0.01
C23
0.01
C19
0.1
C27
11
12
13
14
12
13
14
15
16
18
19
17
20
21
21
22
BUS5
BUS8
BUS8
BUS7
CL076
CL069
CL061
CL066
CL074
CL065
CL079
CL072
CL073
CL073
CL068
CL070
CL077
CL064
CL078
CL067
CL071
CL075
CL063
G
J402
4P
C405
0
ILL+B
USB_D+
USB_D-
RE0
RE1
KEY1
KEY0
SIRCS
LCD_DATA
LCD_CE
LCD_CLK
RE1
KEY1
KEY0
SIRCS
LCD_DATA
LCD_CE
LCD_CLK
NOSE_SW
SERVO
(1/2)
BOARD
(ANTENNA)
-4
-3
-1
-2
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
18
7
6
5
4
3
2
1
17
20
19
32
30
31
8
27
28
29
9
10
11
12
13
14
24
25
26
23
22
21
15
16
12
A
6
B
8
E
14
15
16
9
4
3
F
D
H
I
J
7
2
10
G
11
C
5
13
1
LBAT54ALT1G
D204
16V
C200
10
C202
0.1
RCH_P
LCH_N
RCH_N
BT_POWER
BT_RTS
BT_CTS
BT_TX
BT_RX
LCH_P
BT_MUTE
BT_RESET
DGND
15
LCH_P
MIC+_IN
17
13
18
BT200
16
LCH_N
MIC_OUT
MIC–_IN
AU_GND
RCH_P
12
10
14
11
RCH_N
MUTE
6
UART_CTS
MODULE_PON
8
4
9
7
UART_RTS
3.3
DGND
RESET
UART_TX
3
1
5
2
UART_RX
BT
BOARD
ANTENNA
MIC201
BOARD
(PATTERN ANTENNA)
CN1
C215
0.01
C207
0.1
C205
1
C216
1
R206 0
FB201
0
FB202
0
1
2
3
4
5
6
NLASB3157DFT2G
IC201
NO
GND
NC
COM
VDD
IN
C212
0.1
LRB751V-40T1G
D200
5
4
3
2
1
TK11133CSCL-G
IC202
CONT
GND
NOISE
VOUT
VIN
DRA5114E0L
Q202
DRA5114E0L
Q201
RKZ6.8B2KGP1
D203
RKZ6.8B2KGP1
D202
R200
1k
R202
0
R205
0
R218
1k
R208
2.2k
C206
4.7
C211
4.7
R203
4.7k
R204
2.2k
C210
1000p
R209
1k
C204
0.1
BT_MIC_DET
+3.3V REGULATOR
IC202
IC201
MIC INPUT SELECT
Q201, 202
B+ SWITCH
(BT3950U)
(BT3900U: AEP, RU, UK)
BT39UW/
BT3900U: US, CND
BT3900U: US, CND
BT39UW/BT3900U:
US, CND
US, CND
BT39UW/BT3900U:
US, CND
US, CND
(BT39UW/BT3900U: US, CND)
(BT3900U: AEP, RU, UK/BT3950U)
(BT3900U: AEP, RU, UK/BT3950U)
1k (BT39UW/BT3900U: US, CND)
0 (BT3950U)
R414, 427
2.2uH
JW319
RKZ6.8B2KGP1
D205
BUS6
1
2
3
3P
CN201
MIC_SIGNAL
MIC_GND
MIC_DETECT
1
3
MIC IN
(BT3900U: AEP, RU, UK)
J403
6P
R
L
REAR
AUDIO OUT
L
R
AUDIO OUT
FRONT
SUB OUT
(MONO)
BUS
L
AUDIO IN
R
BT39UW/BT3900U:
US, CND/BT3950U
(BT3950U)
(BT39UW/BT3900U: US, CND)
L
FRONT
R
AUDIO OUT
R
L
AUDIO OUT
REAR/SUB
R414
R427
1
2
3
2
3
3P
CN408
SUB_OUT
GND
SUB_OUT
GND
SUB_OUT
C408
100p
FB409
1
SUB OUT
3
(MONO)
(CHASSIS)
(CHASSIS)
(CHASSIS)
R443
JW365
R442
0
0
FB408
R412 0
R425
(EXCEPT BT3900U: AEP, RU, UK)
(BT3900U: AEP, RU, UK)
0
JC264
0
EXCEPT BT3900U:
AEP, RU, UK
AEP, RU, UK
(BT39UW/BT3900U: US, CND)
BT39UW/BT3900U:
US, CND
US, CND
RESET
(BT3950U)
5-7. SCHEMATIC DIAGRAM - MAIN Section (3/3) -
• See page 23 for Waveforms. • See page 30 for IC Block Diagrams.
(Page 26)
(Page 29)
(Page 25)
(Page 26)
Note 2: When SERVO board is detective, exchange the complete mounted
board.
Note 1: When BT board is detective, exchange the complete mounted board.
Note 3: When the BT board is replaced, it is necessary to confi rm operation.
Refer to “BLUETOOTH FUNCTION CHECKING METHOD US-
ING A CELLULAR PHONE” of the servicing notes (See page 6).
ING A CELLULAR PHONE” of the servicing notes (See page 6).
MEX-BT39UW/BT3900U/BT3950U
MEX-BT39UW/BT3900U/BT3950U
28
28
1
A
B
C
D
E
F
G
H
2
3
4
5
6
7
8
9
10
11
12
13
A
MAIN BOARD
CN102
IC902
IC901
LED920
LED928
LED929
LED923
LED924
LED926
1
52
LSW905
LSW911
LSW912
LED902
LED903
S901
LED904
LED905
LED904, 905
LED906 LED907
LED908 LED909
LED910
LED91
1
LED912
LED913
LED914
LED915
LED916
LED917
LED918
LED919
LED921
LED925
LED931
LED932
LED933
LED934
LED935
LED936
LED937
LED938
LED939
LED940
R920
R921
R927
R942
R956
R957
R960
R961
R962
S902
R963
S903
LED910, 911,
S903
LED912, 913,
S905
LED939, 940,
S904
LED916, 917,
S907
LED918-921,
S906
S904
R965
S905
R966
S906
S907
R971
R979
R983
R984
R984
R996
D921
1
2
3
1
2
3
4
5
RE901
ROTARY ENCODER
6
7
RE901
PUSH ENTER/
SEL/
(VOLUME)
1
16
17
32
33
48
49
64
1
2
19
20
Q901
B C E
B C E
Q903
E C B
Q904
FB901
FB902
FB903
VDR906
VDR908
R902
R904
R905
R906
R908
R909
R910
R91
1
R944
R915
R916
R917
R918
R919
CN901
R922
R923
R924
R925
R926
R928
R929
R930
R931
R932
R933
R934
R935
R901
C901
C902
C903
C904
R940
R941
C906
R943
C909
R945
R946
R948
R938
R949
C910
C911
C912
C915
R951
C916
1
6
5
7
4
CN902
R952
R953
R954
R955
R958
R959
R977
R964
R967
R968
R969
R970
R972
R973
R974
R975
R976
R978
R980
R981
R982
R985
R986
R987
R989
R990
R991
R994
R995
R998
R999
D901
D902
D907
D908
D909
D91
1
D912
D916
LED902,903,
S901
Z
m
.
SEEK–
SEEK–
SEEK+
>
>
M
1-882-750-
(11)
11
1-882-750-
(11)
11
LCD901
LIQUID CRYSTAL DISPLAY PANEL
J901
AUX
MODE
CN902
BT
DISC SLOT
INDICATOR
LED901
LCD BACK
LIGHT
(ILLUMINATOR)
LED906, 907, 931, 932, 935, 936
(ILLUMINATOR)
LED908, 909, 933, 934, 937, 938
(RING ILLUMINATOR)
LED923-926, 928, 929
SCRL
DSPL
LSW905
LSW906
PAUSE
6
LSW907
MIC/ZAP
5
LSW908
ALBUM +
4
LSW909
ALBUM –
3
LSW910
SHUF
2
LSW911
REP
1
LSW912
OFF
SOURCE
LED914, 915,
S902
A
A
A
A
K
A
K
S4
S4
S2
S3
S4
S3
S2
S1
S3
S4
S3
S2
S1
S2
S1
A
K
A
A
A
A
K
K
A
A
A
K
K
K K
A A
K
A
K
K
A
A
K
K
K
K
K
A
A
A
A
A
A1
S2
K2 A2
A1
A1
S1
A2
K1
K2
S1
S2
A
A
A
K
K
A
K K
K
K
A
A
K
K
A
A
A
K
K
A
K
K K
K
K
A
K
A
K
S1
S1
S3
S2
S2
S1
S3
S4
S4
K
K1
LSW910
S2
K2 A2
A1
S1 K1
LSW909
S2
K2 A2
A1
A2
S1
S2
K1
K2
K
K K
S1 S3
S2 S4
A
A
A
S1 K1
LSW908
S2
K2 A2
A1
S1 K1
LSW907
S2
K2 A2
A1
S1 K1
LSW906
S2
K2 A2
A1
S1 K1
(BT39UW/BT3900U: US, CND)
(BT3900U: AEP, RU, UK)
(BT3950U)
CAT
PTY
PTY
PTY
AF/TA
PTY
R903
R912
R936
A1
A2
K1
K2
S1
S2
LSW905 – 912
S901 – 907
LED901-926, 928,
LED929, 931-940
A
K
S1
S2
S3
S4
LED901
A
K
5-8. PRINTED WIRING BOARD - KEY Board -
•
: Uses unleaded solder.
• See page 23 for Circuit Boards Location.
Note: Refer to the servicing notes “NOTE FOR REPLACEMENT OF
THE USB CONNECTOR (CN902) AND THE AUX JACK (J901)”
(See page 5), if replacing the Ref. No. CN902 and the Ref. No. J901.
(See page 5), if replacing the Ref. No. CN902 and the Ref. No. J901.
(Page 24)
Click on the first or last page to see other MEX-BT3900U / MEX-BT3950U / MEX-BT39UW service manuals if exist.