Sony MEX-BT4700U / MEX-BT4750U Service Manual ▷ View online
MEX-BT4700U/BT4750U
MEX-BT4700U/BT4750U
33
33
4-13. SCHEMATIC DIAGRAM - KEY Section -
Note: Refer to the servicing notes “NOTE FOR REPLACEMENT
OF THE USB CONNECTOR (CN971)” (See page 4), if
replacing the Ref. No. CN971.
replacing the Ref. No. CN971.
SUB
BOARD
CN201
B
5.1
5.1
0
0
0
0
5.1
5.1
0.6
5.1
0
5.7
5.7
0
4.9
4.8
4.8
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
5.7
3.2
1.6
3.2
1.6
2.4
2.5
0.3
3.1
2.5
0.3
3.1
3
5.7
5.7
5.7
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
KEY BOARD
JACK BOARD
LCD901
LIQUID CRYSTAL DISPLAY
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
1
4
3
2
44
40 39 38 37
41
42
43
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
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
LC75876WH-US-E
IC981
P3/S3
P4/S4
S5
S6
S7
S8
S9
S10
S1
1
S12
S13
S14
S15
S16
S17
S18
S19
S20
S21
S22
S23
S24
S25
S26
S27
S28
S29
S30
S31
S32
S33
S34
S35
S36
S37
S38
S39
S40
S41
S42
S43
S44
S45
S46
S47
S48
S49
S50
S51
S52
S53
S54
S55
S56
S57
S58
S59
S60
S61
S62
S63
S64
S65
S66
COM1
COM2
COM3
COM4
S67
VDD
VDD1
VDD2
VSS
S68
INH
CE
CL
DI
DIMMER
RING
S64
S65
S66
COM1
COM2
COM3
COM4
S67
VDD
VDD1
VDD2
VSS
S68
INH
CE
CL
DI
DIMMER
RING
3
1
2
4
L921
8
7
6
5
3
4
2
1
SN74LVC2G66DCUR
IC971
GND
VCC
RT1N141C-TP-1
Q993
LED DRIVE
RT1P141C-TP-1
Q971
USB ON/OFF CONTROL
0.1
C981
0.1
C982
0.022
C983
MA2J1110GLS0
D982
MAZ8062GMLS0
D981
2.2
C986
MA2J1110GLS0
D978
R927
330
R993
0
100
R983
100
R984
100
R985
220
R986
820
R951
820
R959
1k
R960
1k
R961
1k
R953
1k
R952
1.2k
R954
1.2k
R962
1.5k
R955
1.5k
R963
1.8k
R956
1.8k
R964
2.2k
R957
2.2k
R965
3.3k
R958
3.3k
R966
470
R973
R974
470
R975
1k
R987
10
R977
10
R976
R972
10k
R971
10k
RB501V-40TE-17
D977
MAZ8068GMLS0
D904
MAZ8068GMLS0
D903
MAZ8068GMLS0
D901
MAZ8068GMLS0
D975
MAZ8068GMLS0
D976
MAZ8068GMLS0
D907
MAZ8068GMLS0
D908
MAZ8068GMLS0
D91
1
1000p
C991
1000p
C992
1.8k
R994
100
R978
100
R988
150
R981
0.1
C903
1000p
C904
LTC614TKFP8T146
Q991
LED DRIVE
VCC
OUT
GND1
GND2
RS-470
IC982
1
2
3
4
5
6
R926
0
R928
220
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
20P
CN901
AUX-R
AUX-GND
KEY1
KEY0
KEY0
KEYGND
LCD-DATA
LCD-CE
GND-USB
VBUS-USB
GND-LCDLED
GND-LCDLED
GND-LCDLED
D- (USB)
D+ (USB)
LCD-CLK
LCD-CLK
SIRCS
RE0
RE1
RE1
DOORSW
+B-LCDLED
AUX-L
RE901
2
1
3
5
6
7
4
C905
4.7
MAZ8180GMLS0
D906
0.47
C984
0.1
C985
680
R917
680
R918
680
R920
680
R919
220
R900
470
R901
330
R903
R904
220
330
R905
R906
220
330
R907
220
R908
470
R944
470
R945
470
R946
330
R915
R916
220
330
R913
R914
220
330
R911
R912
220
330
R909
R910
220
R902
470
1.5M
R982
CL001
CL002
CL003
MAZ8068GMLS0
D912
MAZ8068GMLS0
D910
0.1
C993
SL-194S-WS-SD-T
LED918
SL-194S-WS-SD-T
LED920
CL-197HB1E-D-T
LED924
W0G
J901
FB901
W0L
W0R
FB902
FB903
LCD-DA
TA
LCD-CLK
LCD-CE
RING
DIMMER
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S21
S22
S23
S24
S25
S26
S27
S28
S29
S30
S31
S32
S33
S34
S35
S36
S37
S38
S40
S39
S39
S41
S58
S57
S56
S55
S54
S53
S52
S51
S50
S49
S15
S14
S48
S47
S42
S43
S44
S45
S46
S20
S19
S18
S17
S16
S13
S12
S1
1
S2
S3
S4
S5
S12
S14
S15
S16
S17
S18
S19
S20
S28
S26
S24
S23
S22
S21
S25
S27
S1
1
S10
S9
S8
S7
S6
S34
S35
S36
S37
S38
S39
S40
S41
S42
S43
S44
S45
S46
S47
S48
S49
S50
S51
S52
S53
S54
S55
S56
S57
S58
S59
S60
S61
S62
S63
S64
COM4
COM3
COM2
COM1
S1
S29
S30
S33
S31
S59
S60
S61
S62
COM1
COM2
COM3
COM4
S63
S60
S61
S62
COM1
COM2
COM3
COM4
S63
S64
S13
S32
RING
DIMMER
LCD-DATA
LCD-CE
LCD-CLK
AUX-L
AUX-R
AUX-G
AUX-R
AUX-G
AUX-L
AUX-L
AUX-GND
AUX-R
SEEK-
SEEK+
PUSH ENTER/SELECT/
FRONT
PANEL
OPEN/CLOSE
DETECT
LIQUID CRYSTAL
DISPLAY SRIVER
IC981
REMOTE CONTROL
SIGNAL RECEIVER
IC982
IC971
USB SELECT SWITCH
AUX-GND
AUX-L
AUX-R
(VOLUME)
ROTARY ENCODER
RE901
CN971
(USB)
LED917-920
SEEK+
SEEK-
LED905
LED906
LED902
AUX
1
2
3
4
S971
C
A
10
12
14
7
H
1
3
F
2
13
J
4
D
8
G
5
E
11
15
9
6
B
I
CL-197HB1E-D-T
LED904
MAZ8180GMLS0
D913
FB904
470
3.9k
R967
C995
100p
PUSH ENTER/SELECT/
- ALBUM
1
LED910
REP
3
LED912
ALBUM +
2
LED911
BTM
LED909
PTY
AF/TA
(BT4700U)
(BT4750U)
SOURCE
BLUETOOTH BT
LED907
LED908
ZAP
LED904, 921
LED903
MODE
LED924
OFF
LED901
SCRL
DSPL
LED916
PAUSE
6
LED915
MIC
5
LED914
SHUF
4
LED913
LED991,992
(LCD BACK LIGHT)
150 (BT4700U)
R991
220 (BT4750U)
100 (BT4700U)
R992
220 (BT4750U)
NESW505CT-AST
LED991
NESW505CT-AST
LED992
CL-197HB1E-D-T
LED905
CL-197HB1E-D-T
LED906
CL-197HB1E-D-T
LED907
CL-197HB1E-D-T
LED908
CL-197HB1E-D-T
LED902
CL-197HB1E-D-T
LED915
CL-197HB1E-D-T
LED916
CL-197HB1E-D-T
LED913
CL-197HB1E-D-T
LED914
CL-197HB1E-D-T
LED911
CL-197HB1E-D-T
LED912
CL-197HB1E-D-T
LED909
CL-197HB1E-D-T
LED910
CL-197HB1E-D-T
LED921
SL-194S-WS-SD-T
LED917
SL-194S-WS-SD-T
LED919
CL-197HB1E-D-T
LED901
CL-197HB1E-D-T
LED903
- ALBUM
1
REP
3
ALBUM +
2
BTM
PTY
AF/TA
(BT4700U)
(BT4750U)
SCRL
DSPL
PAUSE
6
MIC
5
SHUF
4
SOURCE
BLUETOOTH BT
ZAP
MODE
OFF
S959
S960
S961
S962
S963
S964
S965
S966
S951
S952
S953
S954
S955
S956
S957
S958
S967
BLUETOOTH
BT
(Page 31)
MEX-BT4700U/BT4750U
MEX-BT4700U/BT4750U
34
34
• Waveforms
– MAIN Board –
IC501 PT (OSC_OUT)
1 V/DIV, 50 ns/DIV
126 ns
3.8 Vp-p
30.4
μs
1.3 Vp-p
IC50 R (XTO)
1 V/DIV, 50 ns/DIV
115 ns
2.4 Vp-p
IC501 RE (X_OUT)
500 mV/DIV, 10
μs/DIV
• IC Block Diagrams
– MAIN Board –
IC1 TEF6607T/V4/S470, 518
AMRFIN 1
AMRFDEC 2
FMIN2 3
FMIN1 4
LOUT 8
ROUT 9
MPXOUT 13
RSSI 14
XTAL2 15
XTAL1 16
GNDAUD 10
GNDRF 5
VCC+8.5V 6
AMRFAGC 7
AMIFAGC 11
MPXIN 12
AMOUT2
32
AMOUT1
31
AMIFAGC1
30
AMSELIN2
29
VCOLOOP
25
VCCVCO
24
VREF+4V
20
SDA
19
SCL
18
GNDDIG
17
GNDANA
23
AMSELIN1
28
TESTCT
27
VCOREF
26
VCC+8.5V
22
GREGSUP
21
AM
TUNER
FM
TUNER
OUTPUT
PLL
TUNING
SYSTEM
I2C BUS
POWER
SUPPLY
STEREO DECODER
HIGH CUT
SOFT MUTE
NOISE BLANKER
SIGNAL
IMPROVEMENT
CONTROL
BANDWIDTH
CONTROL
1
VDDA
2
REF3
3
REF2
4
REF1
5
VSS
6
TM
7
VDDD
8
RESETN
16 MPX
15 INTN
14 CSN
13 SA_DATAOUT
12 SDA_DATAIN
11 SCL_CLK
15 INTN
14 CSN
13 SA_DATAOUT
12 SDA_DATAIN
11 SCL_CLK
10 XTO
9 XTI
SIGMA DELTA
CONVERTER
RDS DEMODULATOR
&
SYNCHRONISATION
RAM BUFFER
&
CONTROL LOGIC
TEST LOGIC
&
PIN MIX'S
SINC4
FILTER
I2C/SPI
INTERFACE
BANDPASS
FILTER
INTERPOLATOR
OSCILLA
TOR
TESTREG
SPL
SCK
SDAIN
SDAOUT
MPX
SINC4
REG
IC50 TDA7333013TR
IC301 TDA8588AJ/N2/R1
MUTING
IN3
12
SVR
VP
10
PGND1
8
VP2
6
SCL
4
SDA
2
IN4
14
PGND3
18
ACGND
16
VP1
20
STB
22
PGND4
24
RST
26
REG1
30
RES-CAP
28
GND
32
REG5
34
BU-CUP
36
OUT3– 3
PGND2/TAB 1
OUT3+ 5
MUTING
OUT1– 7
OUT1+ 9
IN1
REF
11
SGND 13
MUTING
OUT2+ 17
OUT2– 19
IN2 15
MUTING
TEMPERATURE & LOAD
DUMP PROTECTION
AMPLIFIER
TEMPERATURE & LOAD
DUMP PROTECTION
VOLTAGE REGULATOR
PROTECTION/
DIAGNOSTIC
CLIP DETECT/
DIAGNOSTIC
ENABLE
LOGIC
STANDBY/
MUTING
IIC-BUS
INTERFACE
OUT4+ 21
OUT4– 23
DIAG 25
SW2
(REGULATOR & SWITCH BLOCK)
27
SW1 29
REG3 31
REG4 33
VP 35
REG2 37
RESET
REGULATOR 1
REGULATOR 3
REGULATOR 4
REGULATOR 2
REGULATOR 5
MEX-BT4700U/BT4750U
35
IC401 BD3447AFV-E2
21
22
29
30
23
24
40
FIL
GND
SDA
SCL
OUT
-FR
OUT
-FL
OUT
-RR
OUT
-RL
SUB-R
SUB-L
SAOUT
SADA
MIN1
MIN2
EBIAS2
DS2-R
DS1-R
DS3-R
SACLK
39
38
37
VCC
36
27
28
25
26
31
32
33
34
35
20
19
12
11
18
17
1
BUS-R
BUS-L
TU-R
TU-L
CD-L
AUX-R
AUX-G
AUX-L
PD-R
PD-G
PD-L
FP1
FN2
FP2
EBIAS1
DS2-L
DS1-R
DS3-R
FN1
2
3
4
CD-R
5
14
13
16
15
10
9
8
7
6
I2C BUS
LOGIC,
VCO
FADER
FADER
FADER
HPF
LPF
GND
ISO AMP
GND
ISO AMP
180
°/0°
3 BAND P-EQ (TONE CONTROL)
7 BAND
SPECTRUM ANALYZER
/LEVEL METER
EFFECT
VOLUME/MUTE
INPUT GAIN
INPUT SELECTOR (3 SIGLE-END AND 3 STEREO IS O)
FADER
FADER
SPEANA
LVL METER
LVL METER
SPEANA
GND
ISO AMP
GND
ISO AMP
GND
ISO AMP
GND
ISO AMP
MEX-BT4700U/BT4750U
36
IC502, 801 TK11133CSCL-G
CONTROL
CIRCUIT
BANDGAP
REFERENCE
+
–
OVER HEAT &
OVER CURRENT
PROTECTION
1
VCONT
3
NP
2
GND
4
VOUT
5
VIN
1
NO
4 COM
5 V+
6 IN
2
GND
3
NC
IC812 TS5A3159DCKR
IC851 TPS40200DRG4
1
2
RC
GND
DRV
ISNS
VDD
SS
3
COMP
4
FB
SOFT-START
AND
OVERCURRENT
700mV
ENABLE E/A
E/A AND SS
REFFERENCE
REFFERENCE
7
8
6
5
UVLO
OSC
PWM
LOGIC
DRIVER
IC852 TPS2051BDRG4
1
2
GND
OC
IN
CHARGE
PUMP
3
IN
4
EN
DRIVER
CURRENT
LIMIT
THERMAL
SENCE
UVLO
CS
8
7
7
5
6
OUT
OUT
OUT
OUT
IC853 TC7WH123FU (TE12R)
A
B
GND
VCC
RX/CX
CX
Q
RX/CX
CX
Q
5
6
1
2
3
4
2
3
4
7
8
CLR
CLR
Cx
Rx/Cx
Q
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