Sony MEX-BT2900 / MEX-BT2950 Service Manual ▷ View online
MEX-BT2900/BT2950
MEX-BT2900/BT2950
25
25
5-4. SCHEMATIC DIAGRAM - MAIN Section (3/3) -
• See page 21 for Waveforms. • See page 28 for IC Block Diagrams.
(1/3)
MAIN
2
BOARD
(2/3)
BOARD
3
MAIN
A
BOARD
CN901
KEY
3
IC B/D
IC B/D
4.1
4.1
0
0
0
0
0
0
0
0
0
0
0
0
3 (3.3)
6
6
3.8 (5)
3.6
0.4 (2)
3.8
3.8
0.2 (1.8)
8.3
3.1 (2.9)
3.1 (2.9)
0.2 (4.2)
0 (1.3)
3.8
3.8
3.8
3.8
3.8
3.8
3.4
3.4
3.4
4.1
4.1
4.1
4.1
4.1
4.1
0
0
4.1
4.1
4.1
4.1
4.1
4.1
8.3
3
3
3.7
3 (3.3)
3.4
6.9
8.3
5.6
3.6
2.1
0
0
1.2
8.3
8.3
IC302
IC001
MAIN BOARD (3/3)
50V
10
C106
BD3447AFV-E2
IC302
ELECTRONIC VOLUME
BUS_RCH
BUS_LCH
TU_RCH
TU_LCH
CD_RCH
CD_LCH
AUX_RCH
AUX_GND
AUX_LCH
EP1
EN
EP2
FP1
FN1
FN2
FP2
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
RTAN140M-T111-1
Q102
MUTE
FB15
(BT2900: US, CND)
10V
220
C317
100p
C207
R222
1k
50V
10
C206
50V
10
C212
220
R206
220
R106
0
R414
0
R413
100p
C107
R216
10k
R117
10k
R107
50V
10
C41
R121
10k
RTAN140M-T111-1
Q202
MUTE
1k
R112
C213
(BT2900: US, CND/BT2950)
100P
0.1
C316
Q104
MUTE
R221
10k
10k
R207
DRC5114T0L
Q103
MUTE
50V
10
C112
C113
100P
50V
10
C108
R116
C218
100P
FB14
0
0
10k
R217
Q204
MUTE
R122
(BT2900: US, CND)
1k
C118
100P
DRC5114T0L
Q203
RTAN140M-T111-1 (BT2900: US, CND/BT2950)
DRC5114T0L (BT2900: AEP, UK)
Q104, 204
220 (BT2900: US, CND/BT2950)
1k (BT2900: AEP, UK)
R116, 216
MUTE
1k
R212
50V
10
C208
10k
R213
10k
R113
18p
C705
470
R151
2.2k
R155
12k
R153
RKZ18B2KGP1
D719
50V
2.2
C153
18p
C707
100p
C154
1000p
C157
RKZ6.8B2KGP1
D704
UDZSUSTE-176.8B
D153
100p
C155
12k
R154
18p
C708
18p
C706
0
L151
470
R152
1000p
C709
CAM003
RKZ6.8B2KGP1
D703
C931
1000p
1
C151
C459
C460
C463
C466
1
1
1
1
LCH_P
LCH_N
RCH_N
RCH_P
1
C152
C812
1
C813
1
0
L403
CL051
L101
CN403
15P
3
AUX-LCH
2
KEY-GND
10
SIRCS
13
CLK-LCD
7
RE-1
4
AUX-RCH
14
+B
11
DATA-LCD
1
D-GND
8
KEY-1
5
AUX-GND
15
PANEL
12
CE-LCD
9
KEY-0
6
RE-0
C117
1
C217
1
0
C930
J301
2P (BT2900: AEP, UK)
4P (BT2950)
L2
2.2
PH (BT2900)
1
PH (BT2950)
R3
0 (BT2900)
100 (BT2950)
(BT2950)
6P (BT2900: US, CND)
3
1
2
4
5
6
7
8
9
10
11
JL037
(CHASSIS)
CAM002
(CHASSIS)
JL038
JL039
JL040
JL041
JL042
JL043
JL044
JL045
JL046
JL047
JL048
JL049
JL050
50V
1
C203
50V
1
C103
0.1
C26
33p
C8
3.3
PH
L1
470k
R2
15p
C6
0.1
C27
JW148
JW147
J1
(ANTENNA)
100
R13
470k
R1
0.1
C9
0.22
C12
22
R12
0.01
C22
4.7k
R11
16V
47
C28
L3
0.47
PH
R16
0
R15
0
C3
4P
C2
2P
1
C21
JW138
100
R14
12p
C18
L6
FM MIX
1
2
3
4
6
0.1
C17
1000p
C5
JW137
0.1
C25
TEF6617T/V1/S470/M5, 518 (BT2900: AEP, UK)
TEF6617T/V1/S470, 518 (BT2900: US, CND/BT2950)
IC001
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
JW102
1000p
C1
560uH
L8
0.01
C20
560uH
L7
2.2
C13
JW126
4MHz
X1
0.47
C16
0.1
C24
0.01
C23
VR1
0.01
C19
10
11
12
13
11
12
13
14
15
16
18
19
21
19
21
22
BUS4
BUS6
BUS5
BUS7
L-DA
L-CE
L-CLK
RE-1
NOSE-SW
KEY1
RE-0
SIR
KEY0
KEY0
CD_RCH
CD_LCH
SACLK
SADATA
R
R
L
R
L
L
FRONT
(BT2900: US, CND/BT2950)
(BT2900: US, CND)
BUS
AUDIO
IN
AUDIO OUT
REAR/SUB
AUDIO OUT
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
7
6
5
4
3
2
1
32
30
31
8
27
28
29
9
10
11
12
13
14
24
25
26
23
22
21
20
19
18
17
15
16
8
D
12
1
C
A
G
B
10
3
14
5
I
11
F
7
4
2
9
E
13
6
H
L4
3.3
PH
(Page 27)
(Page 23)
(Page 24)
MEX-BT2900/BT2950
MEX-BT2900/BT2950
26
26
5-5. PRINTED WIRING BOARD - KEY Board -
•
: Uses unleaded solder.
• See page 21 for Circuit Boards Location.
Note: Refer to the servicing notes “NOTE FOR REPLACEMENT OF
THE AUX JACK (J901)” (See page 5), if replacing the Ref. No.
J901.
J901.
1
A
B
C
D
E
F
G
H
I
2
3
4
5
6
7
8
9
10
11
12
13
14
A
MAIN BOARD CN403
IC902
IC901
A1
A2
K1
K2
S1
S2
LSW901 – 908
S901 – 907
LED940, 944–952, 955,
LED956, 960, 961, 995-998
A
K
S1
S2
S3
S4
LED931
A
K
1
52
LSW901
LSW902
LSW908
LCD901
LED940
LED944
LED945
LED946
LED947
LED948
LED949
LED950
LED951
LED998
LED952
LED955
LED960
LED956
LED961
LED995
(BT2900: US, CND)
(BT2900: AEP, UK)
(BT2950)
LED996
LED997
S901
S902
S903
S904
S905
S2
S1
S4
S2
S4
S2
S4
S4
S1
S3
S3
S1
S3
S1
S3
S4
S1
S3
S2
S4
A1
S1
A2
S2
K1
K2
A1
S1
A2
S2
K1
K2
A1
S1
A2
S2
K1
K2
LSW903
A1
S1
A2
S2
K1
K2
LSW904
A1
S1
A2
S2
K1
K2
LSW905
A1
S1
A2
S2
K1
K2
LSW906
A1
S1
A2
S2
K1
K2
LSW907
A1
S1
A2
K
K
A
A
S2
K1
K2
S2
S2
S1
S3
K
K
A
K
A
K
A
K
A
K
A
K
A
A
K
K
K
A
A
K
A
K
A
K
A
K
K
A
A
K
A
K
A
A
S4
S906
S907
R988
R989
1
16
17
32
33
48
49
64
1
2
14
15
D975
3
1
D982
D983
D985
D986
D991
D992
D993
D994
Q931
Q932
R1000
FB901
FB902
FB903
R901
R902
R903
R904
R905
R906
R907
R908
R910
R911
R912
R919
CN901
R920
R921
R931
R933
R934
R935
R936
R941
R942
R960
R961
R962
R963
R964
R965
R966
R968
R969
R970
R971
R972
R973
R974
R977
R978
R979
R980
R981
R982
R983
R987
R992
R993
R995
R996
R997
R998
R999
D903
C971
C981 C983
C984
C986
1-882-655-
(11)
11
1-882-655-
(11)
11
LED949-951, 955, 956, 960, 961, 995-997
(ILLUMINATION)
Z
SCRL
DSPL
ALBUM +
2
ALBUM –
1
m
.
SEEK –
LSW908
LSW907
PAUSE
6
LSW906
LSW905
SHUF
4
MIC
5
LSW904
REP
3
LSW903
LSW902
LSW901
CAT
PTY
PTY
PTY
AF/TA
PTY
LED944
(DISC SLOT INDICATOR)
LED945,S904
CALL
LED998,S902
OFF SOURCE
LED947,S903
LED946,S905
LED948,S901
BT
LED952,S906
SEEK +
>
M
MODE
LED940,S907
LED931
(LCD BACK LIGHT)
S909
ROTARY
ENCODER
S909
PUSH SELECT/
(VOLUME)
J901
AUX
IC902
LIQUID CRYSTAL DISPLAY PANEL
B C E
B C E
1
2
3
4
5
S2 S4
S1 S3
(Page 22)
MEX-BT2900/BT2950
MEX-BT2900/BT2950
27
27
5-6. SCHEMATIC DIAGRAM - KEY Board -
• See page 28 for IC Block Diagrams.
(3/3)
A
MAIN
BOARD
CN403
IC B/D
2.6
2.6
5.2
5.1
5.1
0.1
5.1
0.2
5.1
0.1
2.6
5.1
5.1
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
5.2
3.4
1.7
2.6
2.6
2.6
2.6
2.6
5.2
3.4
1.7
2.6
4.7
0.1
3.2
3.2
4.7
0.1
3.2
3.2
0.1
C981
560
R998
LSW905
3
1
2
4
5
6
VCC
OUT
GND
IC902
PNA4813M01S0
REMOTE CONTROL
SIGNAL RECEIVER
RKZ6.8B2KGP1
D992
LSW903
3
1
2
4
5
6
RKZ18B2KGP1
D903
150
R982
820
R997
CL-197HB1E-D-T
LED948
R936
180
R971
1k
1k
R906
1k
R903
DA2J10100L
D982
S903
CL-197HB1E-D-T
LED997
CL-197HB1E-D-T
LED940
120
R933
R973
180
CL-197HB1E-D-T
LED945
120
R934
LSW901
3
1
2
4
5
6
150
R981
820
R901
0.47
C986
1.2k
R907
1.5k
R931
S901
SL-194S-WS-SD-T
LED952
3.3k
R912
6.8k
R988
R972
1.2k
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
15P
CN901
D_GND
KEY_GND
AUX-L
AUX-R
A-GND
RE-0
RE-1
KEY-1
KEY-0
SIRCS
LCD-DATA
LCD-CE
LCD-CLK
ILL+B
PANEL
CL-197HB1E-D-T
LED961
1k
R920
CL-197HB1E-D-T
LED955
R996
180
1M
R987
CL-197HB1E-D-T
LED956
0.1
C983
R963
180
LSW904
3
1
2
4
5
6
100
R979
CL-197HB1E-D-T
LED946
R960
180
CL-197HB1E-D-T
LED944
(DISC SLOT
INDICA
TOR)
120
R935
0.1
C971
LED998
SL-194S-WS-SD-T
S902
470
R999
R962
180
CL-197HB1E-D-T
LED960
RKZ6.8B2KGP1
D994
S907
S904
CL-197HB1E-D-T
LED949
CL-197HB1E-D-T
LED947
100
R977
100
R974
RKZ6.8B2KGP1
D985
LSW907
3
1
2
4
5
6
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16
17
18
19
20
21
22
29
28
27
26
25
24
23
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
LC75829PWH-US-H
IC901
LCD DRIVE
BACKLIGHT
DIMMER
P3/S3
P4/S4
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
S37
S38
S39
S40
S41
S42
S43
S44
S45
S46
S47
S48
S49
S50
S51/COM4
COM3
COM2
COM1
S52
VDD
VDD1
VDD2
VSS
S53/OSCI
INH
CE
CL
DI
LSW902
3
1
2
4
5
6
R964
470
S906
LSW908
3
1
2
4
5
6
CL-197HB1E-D-T
LED950
R968
820
R965
470
R961
180
820
R942
RKZ6.8B2KGP1
D993
LSW906
3
1
2
4
5
6
820
R941
1.8k
R910
0.1
C984
LED931
(LCD BACK LIGHT)
NESW505DT
-AO-UV
R969
820
R983
470
R992
180
100
R978
R970
1.5k
R966
470
CL-197HB1E-D-T
LED996
1.2k
R904
R989
470
S905
1k
R902
470
R1000
RT1N436C-TP-1
Q932
LCD BACKLIGHT SWITCH
820
R905
RKZ6.8B2KGP1
D991
1.5k
R908
CL-197HB1E-D-T
LED995
RT1N140C-TP-1
Q931
DIMMER SWITCH
SL-194S-WS-SD-T
LED951
2.2k
R911
3.9k
R919
R995
180
R993
180
0
R921
R980
470
LCD901
LIQUID CRYSTAL DISPLAY PANEL
1
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
52
2
4
49
51
3
50
S909
2
4
5
3
1
RKZ6.8B2KGP1
D975
RKZ6.8B2KGP1
D986
D983
RKZ5.1B2KGP1
J901
FB902
FB901
FB903
SEG12
COM4
CLK
SEG27
SEG5
SEG15
SEG8
COM3
SEG39
SEG25
COM2
COM1
SEG1
1
SEG31
COM4
SEG24
SEG4
SEG7
SEG45
SEG14
SEG3
SEG2
SEG38
SEG30
SEG23
SEG48
SEG33
SEG23
SEG44
SEG13
SEG43
SEG31
SEG2
SEG20
SEG10
SEG33
SEG17
SEG37
SEG21
SEG34
COM3
SEG22
SEG32
SEG27
SEG19
SEG30
SEG9
SEG47
SEG32
SEG16
SEG26
SEG24
SEG42
SEG18
SEG36
COM2
SEG29
SEG4
SEG22
SEG46
CLK
SEG25
SEG36
SEG41
SEG1
SEG28
SEG35
SEG29
SEG21
SEG3
CE
SEG34
SEG35
SEG28
SEG6
SEG40
COM1
SEG26
SEG37
SEG38
SEG39
SEG40
SEG41
SEG42
SEG43
SEG44
SEG45
SEG46
SEG47
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG1
1
SEG12
SEG13
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG14
DATA
CE
SEG1
DATA
SEG48
KEY BOARD
IC901
IC902
BT
CALL
(VOLUME)
AUX
LED960,961,995
(ILLUMINATION)
LED949-951,955,956,996,997
(ILLUMINATION)
CALL
BT
OFF
SOURCE
SEEK+
SEEK-
SEEK+
SEEK-
1
3
2
MODE
PUSH SELECT/
OFF
SOURCE
MODE
CAT
PTY
(BT2900: US, CND)
(BT2900: AEP, UK)
(BT2950)
PTY
ALBUM –
1
ALBUM +
2
REP
3
SHUF
4
MIC
5
PAUSE
6
SCRL
DSPL
PTY
AF/TA
4
10
2
G
6
C
H
F
9
B
8
A
E
5
3
1
7
I
D
J
11
12
Note: Refer to the servicing notes “NOTE FOR REPLACEMENT OF
THE AUX JACK (J901)” (See page 5), if replacing the Ref. No.
J901.
J901.
(Page 25)
MEX-BT2900/BT2950
MEX-BT2900/BT2950
28
28
• IC Block Diagrams
– MAIN Board –
IC001 TEF6617T/V1/S470, 518 (BT2900: US and Canadian models/BT2950)
IC001 TEF6617T/V1/S470/M5, 518 (BT2900: AEP and UK models)
IC001 TEF6617T/V1/S470/M5, 518 (BT2900: AEP and UK models)
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
IC301 TDF8556AJ/N3
(BT2900: US and Canadian models/BT2950)
IC301 TDF8556AJ/N3/M5 (BT2900: AEP and UK models)
(BT2900: US and Canadian models/BT2950)
IC301 TDF8556AJ/N3/M5 (BT2900: AEP and UK models)
IC302 BD3447AFV-E2
MUTE
MUTE
ENABLE
LOGIC
STANDBY/
MUTE
CHIP DETECT/
DIAGNOSTIC
PROTECTION/
DIAGNOSTIC
SWITCH
REGULATOR
SWITCH
REFERENCE
VOLTAGE
LOAD DUMP
PROTECTION
TEMPERATURE
PROTECTION
BACK-UP
SWITCH
REGULATOR
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
TAB
OUT-FL–
OUT-FL+
OUT-RL–
OUT-RL+
IN-RL
S-GND
IN-RR
OUT-RR+
OUT-RR–
OUT-FR+
OUT-FR–
DIAG
ANT-REM
AMP-REM
SERVO+3.3V
MECHA+6V
VP
BU+B
I2C_SIO
I2C_SCK
VP2
P-GND1
SVR
IN-FL
IN-FR
BEEP
P-GND3
VP1
STB
P-GND4
RST
CRES
AUDIO+B
(8.5V)
(8.5V)
GND
PANEL+B
CBU
FL
RL
RR
VP
FR
I
2
C BUS
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
q/0q
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
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