Sony MEX-BT2700 / MEX-BT2707E / MEX-BT2750 Service Manual ▷ View online
MEX-BT2700/BT2707E/BT2750
MEX-BT2700/BT2707E/BT2750
29
29
4-6. SCHEMATIC DIAGRAM - KEY Board -
R992
R975
R901
R902
R903
R904
R905
R907
R908
R909
R911
R910
R912
R913
R914
R915
R986
R981
R982
Q932
D98
1
R987
LED931
S901
Q931
IC971
D903
D982
R922
CN901
R934
LSW912(1/2)
D994
D993
D991
C971
R984
C983 C984
R985
R921
C921
C922
LSW913(1/2)
LSW914(1/2)
LSW904(1/2)
LSW905(1/2)
LSW906(1/2)
LSW907(1/2)
LSW908(1/2)
LSW909(1/2)
LSW910(1/2)
LSW911(1/2)
LSW903(1/2)
LSW902(1/2)
R974
FB903
C986
R979
R978
R977
C981
IC901
D992
J901
LCD901
R973
R971
LED951
LED952
LED953
R990
Q995
C999
R931
R932
R933
R1941
R1942
C990
R1943
C991
R942
R1944
C997
C995
C998
D986
D985
LED944
LED941
LSW901(2/2)
LSW902(2/2)
R945
R943
R947
R949
LSW903(2/2)
LSW914(2/2)
LSW912(2/2)
LSW913(2/2)
LSW904(2/2)
R950
R951
R954
LSW905(2/2)
LSW909(2/2)
LSW908(2/2)
LSW910(2/2)
R953
R944
R946
R948
LSW906(2/2)
LSW907(2/2)
LSW911(2/2)
R952
RE901
C996
LSW901(1/2)
0
100
820
1k
1k
1.2k
1.5k
820
1k
1k
1.5k
1.2k
1.8k
2.2k
3.3k
3.9k
1k
150
150
RT1N436C-TP-1
MAZ
8051GMLS0
1M
NESW505CT-
SKRPACE010
RT1N140C-TP-1
IC RS-470
MAZ8180GMLS0
MA2J1110GLSO
0
15P
1.2k
MAZ8068GMLS0
MAZ8068GMLS0
MAZ8068GMLS0
0.1
1k
0.1
0.1
1k
0
1000p
1000p
100
0
0.47
100
100
100
0.1
LC75826WH-US-E
MAZ8068GMLS0
180
180
SL-194S-WS-SD
SL-194S-WS-SD
SL-194S-WS-SD
33k
2SC3052
1000p
220
220
220
470
1k
0.1
1k
0.1
680
470
1000p
0.1
1000p
MAZ8068GMLS0
MAZ8068GMLS0
CL197HB1E-D-T
CL197HB1E-D-T
390
470
680
390
680
220
680
390
330
680
390
180
0.1
CE
CLK
DATA
CE
CLK
DATA
COM1
COM2
COM3
COM4
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
S12
S13
S14
S16
S17
S18
S19
S20
S37
S38
S48
S47
S46
S45
S44
S43
S42
S41
S40
S39
S22
COM
1
COM
2
COM
3
COM
4
S48
S47
S46
S45
S44
S43
S42
S41
S40
S39
S38
S37
S36
S35
S34
S33
S32
S31
S30
S29
S28
S27
S26
S25
S24
S23
S21
S20
S19
S18
S17
S16
S15
S14
S13
S12
S11
S10
S9
S8
S7
S6
S5
S4
S3
S2
S1
S21
S22
S23
S24
S25
S26
S27
S28
S29
S30
S31
S32
S33
S34
S35
S36
S15
OFF
SOURCE
KEY-1
KEY-0
DATA-LCD
CE-LCD
PANEL
MODE
SOURCE
OFF
D-GND
RE-0
RE-1
(LCD BACK LIGHT)
BACK-LIGHT
DIM
MER
KEY-DND
INH
OSC
VDD
VDD1
VDD2
DI
CL
CE
MODE
SIRCS
VCC
GND1
GND2
OUT
COLOR2/BLINK
COLOR1
BT
VSS
LIQUID CRYSTAL DISPLAY
S4
S3
COM4
COM3
COM2
COM1
S2
S5
S6
S7
S8
S9
S10
S11
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
S48
S47
S46
S45
S44
S43
S42
S41
S40
S39
S38
S37
REMOTE CONTROL
RECEIVER
LIQUID CRYSTAL DISPLAY DRIVER
PAUSE
6
SEEK+
SEEK-
BTM
PTY
AF/TA
CAT
BTM
BTM
(BT2750:E,EA,IND)
BT2700:US,CND/
BT2750:MX
BT2750:MX
BT2700:AEP,IT,UK
/BT2707E
1
-ALBUM
2
ALBUM+
SHUF
4
REP
3
MIC
5
BT
PUSH SELECT/
(VOLUME)
LED951-953
PUSH SELECT/
(VOLUME)
ROTARY ENCODER
LED DRIVE SWITCH
DIMMER SWITCH
AUX
AUX-LCH
AUX-RCH
AUX-GND
+B
CLK-LCD
DISC SLOT
ILLUMINATION
SCRL
DSPL
BTM
PTY
AF/TA
CAT
BTM
BTM
(BT2750:E,EA,IND)
BT2700:US,CND/
BT2750:MX
BT2750:MX
BT2700:AEP,IT,UK
/BT2707E
2
ALBUM+
PAUSE
6
1
-ALBUM
REP
3
SHUF
4
MIC
5
SCRL
DSPL
SEEK+
SEEK-
LED DRIVE
(Page
27)
• See page 30 for IC Block Diagrams.
Note: Refer to the servicing notes “NOTE FOR REPLACEMENT OF THE
AUX JACK (J901)” (See page 5), if replacing the Ref. No. J901.
MEX-BT2700/BT2707E/BT2750
MEX-BT2700/BT2707E/BT2750
30
30
• Waveforms
– MAIN Board –
IC501 RE (OSCOUT)
1 V/DIV, 50 ns/DIV
91 ns
3.6 Vp-p
IC51 R (XTO)
1 V/DIV, 50 ns/DIV
116 ns
2.5 Vp-p
IC501 RB (XOUT)
1 V/DIV, 10
μs/DIV
30.4
μs
2.7 Vp-p
• IC Block Diagrams
– MAIN Board –
IC1 TEF6607T/V4/S470, 518
IC51 TDA7333013TR
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
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
IC401 BD3447AFV-E2
MEX-BT2700/BT2707E/BT2750
31
IC580 BA8271F-E2
1
2
3
4
5
6
7
8
9
10
14
13
12
11
VCC
BUS ON
LINK OFF
CLK OUT
D
ATA
O
U
T
D
ATA
IN
BUS RESET
BUS DA
TA
VREF
BUS CLK
GND
BUS ON IN
BUS ON OUT
RESET
RESET
SWITCH
IC750 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-BT2700/BT2707E/BT2750
32
– KEY Board –
IC901 LC75826WH-US-E
48 S48
47 S47
46 S46
45 S45
44 S44
43 S43
42 S42
41 S41
40 S40
39 S39
47 S47
46 S46
45 S45
44 S44
43 S43
42 S42
41 S41
40 S40
39 S39
19
S19
20
S20
17
S17
18
S18
21
S21
22
S22
23
S23
24
S24
25
S25
26
S26
27
S27
28
S28
3
P3/S3
4
P4/S4
1
P1/S1
2
P2/S2
5
P5/S5
6
P6/S6
7
P7/S7
8
P8/S8
9
S9
10
S10
11
S11
12
S12
52
COM3
51
COM4
59
VSS
58
VDD2
57
VDD1
56
VDD
64
DI
63
CL
62
CE
60
S52/OSCI
55
S51
61
INH
COMMON
DRIVER
CLOCK
GENERATOR
CCB INTERFACE
SHIFT REGISTER
CONTROL
REGISTER
SEGMENT DRIVER & LATCH
13
S13
14
S14
15
S15
16
S16
29
S29
30
S30
31
S31
32
S32
38 S38
37 S37
36 S36
35 S35
34 S34
33 S33
37 S37
36 S36
35 S35
34 S34
33 S33
50
S50
49
S49
54
COM1
53
COM2
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