Sony MEX-BT2800 / MEX-BT2807E / MEX-BT2850 Service Manual ▷ View online
MEX-BT2800/BT2807E/BT2850
MEX-BT2800/BT2807E/BT2850
25
25
• See page 28 for IC Block Diagrams.
4-4. SCHEMATIC DIAGRAM - MAIN Section (3/3) -
R401
C151
C152
C28
R432
C451
C431
C441
R462
R442
Q461
Q451
C471
C481
Q471
Q481
R471
R481
R472
R482
X1
R752
C756
C455
C465
C755
C462
C452
R461
R452
R451
C464
C454
FB1
C1
FB2
L2
C5
C12
L6
C8
L1
C13
R4
R5
C16
C17
R10
C405
C404
C409
R12
C27
R13
R14
C25
C23
C22
C24
L8
C21
C20
C19
R2
R1
JW112
C401
C412
C413
C406
C407
C719
C157
L151
C154
R152
C709
C708 C707 C706
CN701
C153
R153
R154
R151
R11
D719
C551
R155
JW53
JW72
JW52
IC401
C403
C402
R330
R332
R333
R331
C444
C434
JW127
C216
C215
R414
C810
C820
C155
JC151
C705
FB402
FB401
C408
C26
C3
L3
0.47
PH
560
PH
560
PH
C2
L4
3.3
PH
3.3
PH
IC1
C330
C331
VDR1
J1
Q431
R6
C18
C461
L7
J330
C9
R3
R3
D704
D703
D153
10
1
50V
1
50V
47
16V
10k
10
50V
10
50V
10
50V
10k
10k
RT1N140C
RT1N140C
10
50V
10
50V
220
220
10k
10k
4MHz
150
0
1
1
0.001
1
1
1k
10k
1k
100p
100p
0.001
C6
15p
0.001
0.22
33p
2.2
0
0
0.47
0.1
33k
1
1
10p
22
0.1
100
100
0.1
0.01
0.01
0.1
1
0.01
0.01
470k
470k
47
16V
220
10V
0.1
1
50V
1
50V
0.001
0.001
0
100p
470
18p
18p
18p
18p
15P
2.2
50V
12k
12k
470
4.7k
MAZ8180GM
0.001
2.2k
BD3447AFV
1
50V
1
50V
1k
10k
10k
1k
100p
100p
1
50V
1
50V
0
R413
0
JC497
0
JC499
0
0.0022
0.0022
100p
0
18p
10p
0.1
4p
2p
100p
100p
(ANTENNA IN)
68k
12p
10
50V
6P
0.1
MAZ8068GMLS0
MAZ8068GMLS0
UDZSUSTE-176.8B
E1
E2
E3
E4
E5
E6
E7
E8
E9
E10
E11
E12
E13
E14
E16
C1
C2
C3
C4
C5
C7
C8
C9
C10
C11
C12
L-CLK
L-CE
L-DA
SIR
KEY0
KEY1
NOSE-SW
RE-0
RE-1
I2C-SCL
I2C-SDA
I2C-SDA
I2C-SDA
BEEP
STB
DIAG
ATT
I2C-SCL
SACLK
SADATA
KEY-1
KEY-0
CE-LCD
DATA-LCD
CLK-LCD
PANEL
+B
SIRCS
RE-1
D-GND
AUX-RCH
AUX-LCH
RE-0
AUX-GND
KEY-GND
REAR/SUB AUDIO OUT
BUS AUDIO IN
FRONT AUDIO OUT
(CHASSIS)
(3/3)
(CHASSIS)
(CHASSIS)
ELECTRICAL VOLUME,
INPUT SELECT
PLL
2.2μH
1μH (BT2850)
TEF6617T
(BT2850)
0
100
FB1
0
L2
R3
0
FB2
(BT2800: US, CND/BT2850:E)
(BT2800: AEP, UK/BT2807E/BT2850:EA)
R431, 441
(BT2800: US, CND/BT2850)
(BT2800: AEP, UK/BT2807E)
R
L
R
L
R
L
MUTING
Q431,441,451,461,471,481
(BT2850)
(BT2850)
BT2800: US,
CND
(BT2850)
BT2800: AEP, UK/
BT2807E/BT2850
(BT2800: AEP, UK/BT2807E)
220
1K
1K
Q431, 441
(BT2800: US, CND/BT2850)
(BT2800: AEP, UK/BT2807E)
RTAN140C-T112A-1
RT1N140C
RT1N140C
(BT2800/BT2807E)
(BT2800: US, CND)
(BT2800: US, CND/BT2850)
Q441
R431
R441
RTAN140C-
T112A-1
RTAN140C-T112A-1
RTAN140C-
T112A-1
(Page 24)
(Page 23)
(Page 27)
MEX-BT2800/BT2807E/BT2850
MEX-BT2800/BT2807E/BT2850
26
26
•
: Uses unleaded solder.
• See page 21 for Circuit Boards Location.
4-5. PRINTED WIRING BOARD - KEY Board -
1
A
B
C
D
E
F
G
H
2
3
4
5
6
7
8
9
10
11
12
13
14
IC902
SEEK +
SEEK –
LED947, S903
BT
LSW906
LSW905
LSW904
LSW902
LSW903
LED948, S901
LED960, 961
(ILLUMINATION)
LED946, S905
SCRL
DSPL
DSPL
MIC
5
LSW908
LSW907
1-880-258-
(41)
41
1-880-258-
(41)
41
PUSH/SELECT/
(VOLUME)
S909
LED940, S907
AUX
J901
LED949, 950, 955, 956
LED945, S904
LED951, S902
MODE
LED952, S906
SOURCE
OFF
M >
. m
LED931
(LCD BACK LIGHT)
Z
LCD901
LIQUID CRYSTAL DISPLAY PANEL
3
4
5
1
2
1
52
LSW902
LSW903
LSW904
LSW905
LSW906
LSW907
LSW908
LED940
LED944
LED944
(DISC SLOT ILLUMINATION)
LED945
LED946
LED947
LED948
LED949
LED950
LED951
LED952
LED955
LED956
LED960
LED961
S901
S902
S903
S904
S905
S906
S907
S909
R988
R989
IC902
ECB
1
16
17
32
33
48
49
64
D982
D983
D985
D986
D991
D992
D993
D994
Q931
Q932
FB901
FB902
FB903
R901
R902
R903
R904
R905
R906
R907
R908
R910
R911
R912
R919
CN901
R921
R922
R922
R931
R933 R934
R935
R941
R942
R959
R960
R961
R962
R963
R964
R965
R966
R972
R973
R974
R975
R977
R978
R979
R980
R981
R982
R982
R983
R987
R990
R991
R992
R993
R995
R996
R997
D903
C971
C981
IC901
C983
C984
C986
14
2
15
1
A
MAIN BOARD CN701
ECB
A1
A2
K1
K2
S1
S2
1
3
A1
A2
K1
K2
S1
S2
A1
A2
K1
K2
S1
S2
A1
A2
K1
K2
S1
S2
A1
A2
K1
K2
S1
S2
A1
A2
K1
K2
S1
S2
A1
A2
K1
K2
S1
S2
PAUSE
6
REP
3
SHUF
4
ALBUM –
1
ALBUM +
2
PTY
CAT
PTY
PTY
(BT2800: US, CND)
(BT2850)
(BT2800: AEP, UK/BT2807E)
PTY
AF/TA
A
K
A
K
(ILLUMINATION)
A
K
A
K
A
K
S1
S2
S3
S4
A1
A2
K1
K2
S1
S2
LSW902 – 908
S901 – 907
LED940, 944 – 952,
LED955, 956, 960, 961
A
K
S1
S2
S3
S4
LED931
A
K
K
A
K
A
K
A
K
A
K
A
S1
S2
S3
S4
S1
S2
S3
S4
S1
S2
S3
S4
S1
S2
S3
S4
S1
S2
S3
S4
S1
S2
S3
S4
KEY BOARD
(COMPONENT SIDE)
KEY BOARD
(CONDUCTOR SIDE)
A
K
A
K
A
K
A
K
A
K
C919
D995
R976
R937
B
C
E
Q933
ROTARY
ENCODER
Note: Refer to the servicing notes “NOTE FOR REPLACEMENT
OF THE AUX JACK (J901)” (See page 5), if replacing the
Ref. No. J901.
Ref. No. J901.
(Page 22)
MEX-BT2800/BT2807E/BT2850
MEX-BT2800/BT2807E/BT2850
27
27
4-6. SCHEMATIC DIAGRAM - KEY Board -
• See page 28 for IC Block Diagrams.
CN701
(3/3)
BOARD
MAIN
A
IC B/D
0.1
0.1
5.2
5.1
5.2
5.1
2.6
2.6
2.6
2.6
2.6
2.6
2.6
5.2
3.5
1.7
2.6
2.6
2.6
2.6
2.6
2.6
5.2
3.5
1.7
2.6
4.7
0.3
3.1
4.7
0.3
3.1
3
5.1
5.2
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
5.1
0
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
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
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
LC75829PWH-US-H
IC901
LIQUID CRYSTAL DISPLAY DRIVER
BACK-LIGHT
DIMMER
NCO
BLINK
SEG48
SEG47
SEG46
SEG45
SEG44
SEG43
SEG42
SEG41
SEG40
SEG39
SEG38
SEG37
SEG36
SEG35
SEG34
SEG33
SEG32
SEG31
SEG30
SEG29
SEG28
SEG27
SEG26
SEG25
SEG24
SEG23
SEG22
SEG21
SEG20
SEG19
SEG18
SEG17
SEG16
SEG15
SEG14
SEG13
SEG12
SEG1
1
SEG10
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
COM4
COM3
COM2
COM1
S2
VDD
VDD1
VDD2
VSS
S52/OSC
INH
CE
CLK
DATA
SEG3
COM4
COM3
COM2
COM1
S2
VDD
VDD1
VDD2
VSS
S52/OSC
INH
CE
CLK
DATA
LCD901
LIQUID CRYSTAL DISPLAY
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
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
15P
CN901
D-GND
KEY-GND
AUX-LCH
AUX-RCH
AUX-GND
RE-0
RE-1
KEY-1
KEY-0
SIRCS
DATA-LCD
CE-LCD
CLK-LCD
+B
PANEL
100
R977
100
R978
100
R979
0.1
C984
0.1
C983
0.1
C981
0.47
C986
1M
R987
MA2J1
110GLS0
D982
MAZ8051GMLS0
D983
0.1
C971
150
R981
150
R982
100
R975
100
R974
1.2k
R904
820
R901
1k
R902
1k
R903
0
R922
0
R921
820
R905
1k
R906
1k
R907
1.2k
R908
1.5k
R910
2.2k
R912
3.3k
R919
3.9k
R988
MAZ8068GMLS0
D986
MAZ8068GMLS0
D985
MAZ8068GMLS0
D991
MAZ8068GMLS0
D992
MAZ8068GMLS0
D993
MAZ8068GMLS0
D994
MAZ8180GMLS0
D903
RT1N436C-TP-1
Q932
LCD BACK LIGHT SWITCH
1.2k
R931
NESW505CT-AST
LED931
220
R935
220
R934
220
R933
CL-197HB1E-D-T
LED944
470
R941
CL-197HB1E-D-T
LED952
CL-197HB1E-D-T
LED951
CL-197HB1E-D-T
LED949
CL-197HB1E-D-T
LED950
CL-197HB1E-D-T
LED947
CL-197HB1E-D-T
LED948
CL-197HB1E-D-T
LED945
CL-197HB1E-D-T
LED946
R980
470
R989
270
R991
470
R990
270
R992
270
R993
470
R996
390
R995
470
R972
1k
C919
0.1
R963
470
R965
470
R983
0
R973
820
R966
1k
R964
470
R962
470
CL-197HB1E-D-T
LED961
CL-197HB1E-D-T
LED960
1.8k
R911
CL-197HB1E-D-T
LED940
CL-197HB1E-D-T
LED955
CL-197HB1E-D-T
LED956
R961
470
R960
470
R959
0
R997
390
R937
0
390
R942
R976
820
VCC
OUT
GND
IC902
PNA4813M01S0
RT1N140C-TP-1
Q931
DIMMER SWITCH
J901
FB902
0
FB901
0
FB903
0
S901
S902
S903
S907
S906
S905
S904
S909
ROTARY
ENCODER
LSW908
3
1
2
4
5
6
3
1
2
4
5
6
3
1
2
4
5
6
3
1
2
4
5
6
3
1
2
4
5
6
3
1
2
4
5
6
3
1
2
4
5
6
COM1
COM2
COM3
COM4
S48
S46
S47
S45
S44
S43
S42
S41
S40
S39
S38
S37
S36
S35
S34
S33
S32
S31
S30
S29
S28
S27
S26
S25
S24
S23
S22
S21
S20
S19
S18
S17
S16
S15
S14
S13
S12
S1
1
S10
S9
S8
S7
S6
S5
S4
S3
S2
S20
S19
S18
S17
S16
S15
S14
S13
S12
S1
1
S10
S9
S8
S7
S6
S4
S3
COM4
COM3
COM2
COM1
S2
S3
COM4
COM3
COM2
COM1
S2
S1
S5
CE
CLK
DATA
CLK
DATA
S48
S47
S46
S45
S44
S43
S42
S41
S40
S39
S38
DATA
CLK
CE
S37
S1
S21
S22
S23
S24
S25
S26
S27
S28
S29
S30
S31
S32
S33
S34
S35
S36
S22
S23
S24
S25
S26
S27
S28
S29
S30
S31
S32
S33
S34
S35
S36
AUX
LCD
BACK
LIGHT
DISC
SLOT
ILLUMINATION
SOURCE
OFF
SCRL
DSPL
BT
MODE
LED949, 950, 955, 956, 960, 961
(ILLUMINATION)
SOURCE
OFF
BT
SCRL
DSPL
PUSH/SELECT/
(VOLUME)
SEEK +
SEEK -
MODE
PAUSE
6
LSW902
(BT2800: US, CND)
(BT2800: AEP, UK/BT2807E)
(BT2850)
PTY
PTY
AF/TA
CAT
PTY
LSW906
SHUF
4
LSW904
ALBUM +
2
LSW903
ALBUM -
1
LSW907
MIC
5
LSW905
REP
3
REMOTE CONTROL
RECEIVER
KEY BOARD
IC902
IC901
10
3
D
1
6
8
11
7
12
5
G
E
4
2
F
9
B
A
13
H
C
5
2
1
4
3
SEEK +
SEEK -
MAZ8051GMLS0
D955
DTC114TKA
Q933
LED DRIVE
1 3 2
(Page 25)
Note: Refer to the servicing notes “NOTE FOR REPLACEMENT
OF THE AUX JACK (J901)” (See page 5), if replacing the
Ref. No. J901.
Ref. No. J901.
MEX-BT2800/BT2807E/BT2850
MEX-BT2800/BT2807E/BT2850
28
28
• IC Block Diagrams
– MAIN Board –
IC1 TEF6617T/V1/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
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
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
IC580 BA8271F-E2
1
2
3
4
5
6
7
8
9
10
14
13
12
11
VCC
BUS ON
LINK OFF
CLK OUT
DA
TA
OUT
DA
TA
IN
BUS RESET
BUS DA
TA
VREF
BUS CLK
GND
BUS ON IN
BUS ON OUT
RESET
RESET
SWITCH
IC681, 800 TK11133CSCL-G
CONTROL
CIRCUIT
BANDGAP
REFERENCE
+
–
OVER HEAT &
OVER CURRENT
PROTECTION
1
VCONT
3
NP
2
GND
4
VOUT
5
VIN
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