Sony MEX-BT2500 Service Manual ▷ View online
MEX-BT2500
33
33
MEX-BT2500
5-6. SCHEMATIC DIAGRAM – KEY Board –
•
See page 34 for Waveforms.
•
See page 34 for IC Block Diagrams.
R974
R904
CN901
FB901
FB902
FB903
D988
D987
D989
D990
D991
D903
D992
D993
D994
C988
R934
Q931
Q932
R932
R933
D998
R931
S904
R907
R908
R909
R910
R911
R912
R913
R914
R915
R916
S901
S902
R901
S903
R902
R903
R905
R922
R921
R992
R941
R942
R943
R944
R945
R946
R947
R948
R962
R961
R975
C971
D981
D982
C985
R987
C986
C981
R988
C987
C983
C984
R982
R981
IC901
J901
R984
R985
R986
R977
R978
R979
R954
R953
R949
R950
R951
R952
LED931
LCD901
R923
RE901
IC971
LSW911(2/2)
LSW903(2/2)
LSW904(2/2)
LSW905(2/2)
LSW906(2/2)
LSW907(2/2)
LSW912(2/2)
LED942
LED953
LED952
LED945
LED944
LSW908(2/2)
LSW909(2/2)
LSW910(2/2)
LSW901(2/2)
LSW902(2/2)
LED941
LED943
LED951
100
1.2k
15P
100
100
0
MA8051-M-TX
MA8051-M-TX
MA8051-M-TX
MA8051-M-TX
MA8068-M-TX
MA8180-M-TX
MA8068-M-TX
MA8068-M-TX
MA8068-M-TX
0.1
1.5k
RT1N140C
RT1N436C
220
220
0
220
820
1k
1k
1.2k
1.5k
1.8k
2.2k
3.3k
3.9k
5.6k
820
1k
1k
1.5k
0
0
0
120
220
470
470
820
820
470
470
330
330
100
0.1
MA8051-M-TX
1SS355TE-17
0.15
1M
0.22
0.1
39k
0.001
0.1
0.1
150
150
LC75836E
1k
1k
1k
100
100
100
470
470
120
220
120
220
NESW505CT-AST
0
RS-770
CL-197HB1E
CL-197HB1E
CL-197HB1E
CL-197HB1E
CL-197HB1E
CL-197HB1E
CL-197HB1E
CL-197HB1E
CE
DATA
CLK
CE
DATA
S
1
S
2
S
3
S
4
S
5
S6
S
7
S8
S9
S
1
0
S
1
1
S1
2
S1
3
S
1
4
S
1
5
S
1
6
S
1
7
S1
8
S
1
9
S2
0
S
2
1
S
2
2
S
2
3
S
2
4
S
2
5
S
2
6
S
2
7
S
2
8
S
2
9
S
30
S
3
1
S
3
2
S
3
3
CLK
C
O
M
1
C
O
M
2
C
O
M
3
C
O
M
4
S1
S2
S3
S4
S5
S6
S7
S
8
S
9
S
1
0
S
1
1
S
1
2
S1
3
S
1
4
S
1
5
S
1
6
S
17
COM3
COM4
S18
S
1
9
S
20
S
2
1
S
2
2
S
23
S
2
4
S
2
5
S
2
6
S
27
S
2
8
S29
S30
S31
S32
S33
C
O
M
1
C
O
M
2
KEY-1
KEY-0
DATA-LCD
CE-LCD
CLK-LCD
+B
PANEL
D-GND
AUX-L
AUX-R
AUX-GND
RE-0
RE-1
B
ACK-LIGHT
DIM
M
ER
KEY-DND
INH
OSC
VDD
VDD1
VDD2
DI
CL
CE
SIRCS
S8
S9
S10
S11
S12
S1
3
S14
S15
S16
S17
C
OM
1
C
OM
2
S7
S6
S5
S4
S3
S2
S1
S33
S32
S31
S30
S29
S1
9
S
20
S
21
S
22
S
23
S
24
S
25
S
26
S27
S
28
GND
COM3
COM4
S18
LCD DRIVER
DISC SLOT
ILLUMINATION
OFF
PAUSE
6
SCRL
AF/TA
(US,CND,E)
(AEP,UK)
(AEP,UK)
(US,CND,E)
BTM
PTY
BLUETOOTH
EQ
SOURCE
MODE
5
AUX
(LCD BACK LIGHT)
DIMMER
SWITCH
SWITCH
LED DRIVE
S1
S2
S
3
S4
S5
S6
S7
S8
S9
S10
S11
S12
S13
S14
S15
S16
S17
S18
S19
S20
S21
S
22
S23
S24
S25
S2
6
S27
S
28
S29
S30
S
31
S32
S33
COM
4
COM
3
C
OM
2
COM
1
LIQUID CRYSTAL DISPLAY
LSW912(1/2)
LSW911(1/2)
LSW910(1/2)
LSW909(1/2)
LSW908(1/2)
LSW907(1/2)
LSW906(1/2)
LSW905(1/2)
LSW904(1/2)
LSW903(1/2)
LSW901(1/2)
LSW902(1/2)
OFF
SOURCE
BLUETOOTH
EQ
(AEP,UK)
(US,CND,E)
PTY
BTM
SEEK+
SEEK-
MODE
DIM
DSPL
ALBM -
1
PAUSE
6
5
SHUF
4
REP
3
ALBM +
2
(US,CND,E)
(AEP,UK)
SCRL
AF/TA
ROTARY ENCODER
PUSH SELECT/
ROTARY ENCODER
PUSH SELECT/
(VOLUME)
LED951-953
(VOLUME)
SEEK+
SEEK-
DIM
DSPL
1
ALBM -
2
ALBM +
REP
3
SHUF
4
REMOTE CONTROL RECEIVER
(Page 31)
Note: Refer to the Servicing Notes “NOTE FOR REPLACEMENT
OF THE AUX JACK (J901)” (page 5), if replacing the Ref. No.
J901.
J901.
34
34
MEX-BT2500
MEX-BT2500
•
Waveforms
– MAIN Board –
– KEY Board –
1
IC501
ul
(XOUT)
500 mV/DIV, 20
µ
s/DIV
30.4
µ
s
1.1 Vp-p
2
IC501
id
(OSCOUT)
1 V/DIV, 20 ns/DIV
54 ns
3.4 Vp-p
qa
IC971
rf
(OSC)
1 V/DIV, 10
µ
s/DIV
25.5
µ
s
2.6 Vp-p
•
IC Block Diagrams
– MAIN Board –
IC50 TDA7333013TR
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
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
OSCILLATOR
TESTREG
SPL
SCK
SDAIN
SDAOUT
MPX
SINC4
REG
IC300 TDA8588BJ/N2/R1
MUTE
MUTE
ENABLE
LOGIC
STANDBY/
MUTE
BATTERY
DETECTION
CHIP DETECT/
DIAGNOSTIC
PROTECTION/
DIAGNOSTIC
SWITCH
REGULATOR
SWITCH
REFERENCE
VOLTAGE
LOADDUMP
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
SERVO5V
MECH6V
VP
B.UP+B
SDA
SCL
VP2
PGND3
SVR
IN-FL
IN-FR
BEEP
PGND2
VP1
STB
PGND1
RST
CRES
AUDIO8.3V
GND
PANEL+B
CBU
FL
RL
RR
VP
FR
I
2
C BUS
35
MEX-BT2500
FIL
20
GND
19
SDA
18
SCL
17
MUTE
16
VCC
15
OUT-FR
14
OUT-FL
13
OUT-RR
12
OUT-RL
11
FADER
VCC
FADER:
0 – -62dB/1dB step
0 – -62dB/1dB step
TREBLE:
• fc = 10kHz
• GAIN =
• fc = 10kHz
• GAIN =
±20dB/1dB step
• Q = 1
BASS:
• fc = 100Hz
• GAIN =
• fc = 100Hz
• GAIN =
±20dB/1dB step
• Q = 1
VCO
I
2
C BUS
LOGIC
FADER
FADER
FADER
BUS-RCH
1
BUS-LCH
2
TU-RCH
3
TU-LCH
4
CD-RCH
5
CD-LCH
6
AUX-RCH
7
DN1
8
DN2
9
AUX-LCH
10
INPUT SELECTOR
INPUT GAIN
(0 – -20dB/1dB step)
PRIMARY VOLUME
(+12dB – -20dB/1dB step)
MUTE
BASS/TREBLE
VCC/2
IC401 BD3444FS-E2
– KEY Board –
IC901 LC75836WH-US-E
36 COM2
35 COM1
35 COM1
34 S34
33 S33
32 S32
31 S31
30 S30
29 S29
28 S28
27 S27
26 S26
25 S25
33 S33
32 S32
31 S31
30 S30
29 S29
28 S28
27 S27
26 S26
25 S25
15
S15
16
S16
13
S13
14
S14
17
S17
18
S18
19
S19
20
S20
21
S21
22
S22
23
S23
24
S24
3
P3/S3
4
P4/S4
1
P1/S1
2
P2/S2
5
S5
6
S6
7
S7
8
S8
9
S9
10
S10
11
S11
12
S12
38
COM4
37
COM3
43
VSS
42
VDD2
41
VDD1
40
VDD
48
DI
47
CL
46
CE
44
OSC
39
S35
45
INH
COMMON
DRIVER
CLOCK
GENERATOR
CCB INTERFACE
SHIFT REGISTER
CONTROL
REGISTER
SEGMENT DRIVER & LATCH
36
MEX-BT2500
•
IC Pin Function Description
MAIN BOARD IC501 MB90F045PF-G-9044-SPE1 (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1 to 3
AREASEL0 to
AREASEL2
I
Model destination signal input terminal
4
B-OUT SEL
I
Blackout setting terminal "H": blackout effective
5
BEEP
O
Beep sound drive signal output to the power amplifier
6
NCO
-
Not used
7
DIAG
I
Diagnostic signal input from the power amplifier
8
AMPSTB
O
Standby control signal output to the power amplifier
9
VOLATT
O
Muting on/off control signal output to the electrical volume "H": muting on
10
NCO
-
Not used
11
VSS
-
Ground terminal
12
TUATT
O
Tuner muting on/off control signal output terminal
13
NSMASK
O
Discharge control signal output for the noise detection circuit
"H": discharge (AEP, UK models only)
"H": discharge (AEP, UK models only)
14
ILLUMI_SEL
I
Illumination voltage setting terminal "L": 10.4V, "H": 12.5V Fixed at "L" in this set
15 to 22
NCO
-
Not used
23
VCC5
-
Power supply terminal (+3.3V)
24
EEP_SIO
I/O
Two-way data bus with the tuner unit
25
EEP_CKO
O
Serial data transfer clock signal output to the tuner unit
26
RDS_ON
O
Power on/off control signal output terminal for the RDS section (AEP, UK models only)
27
LCD_CE
O
Chip enable signal output to the liquid crystal display driver
28
LCD_SO
O
Serial data output to the liquid crystal display driver
29
LCD_CKO
O
Serial data transfer clock signal output to the liquid crystal display driver
30
NCO
-
Not used
31, 32
RE-IN0, RE-IN1
I
Jog dial pulse input from the rotary encoder
33
I2C_SCK
O
IIC data transfer clock signal output terminal
34
I2C_SIO
I/O
IIC two-way data bus
35
DAVDD
-
Power supply terminal (+3.3V)
36
AVRH
I
Reference voltage (+3.3V) input terminal (for A/D conversion)
37
DAVSS
-
Ground terminal
38
QUALITY
I
Noise level detection signal input at SEEK mode
39
VSM
I
FM and AM signal-meter voltage detection signal input from the tuner unit (A/D input)
40, 41
KEYIN1,
KEYIN0
I
Front panel key input terminal (A/D input)
42
VSS
-
Ground terminal
43 to 46
NCO
-
Not used
47
BT_INT-HF
I
HF operation notification signal input from the bluetooth section "H": active
48
AD_ON
O
A/D converter power control signal output
When the KEYACK (pin 52) that controls reference voltage power for key A/D conversion input
is active, "L" is output from this terminal to enable the input
When the KEYACK (pin 52) that controls reference voltage power for key A/D conversion input
is active, "L" is output from this terminal to enable the input
49 to 51
MD0 to MD2
I
Setting terminal for the CPU operational mode
52
KEY ACK
I
Acknowledge signal (wake up signal) input terminal for the key entry Acknowledge signal is
input to accept any function key in the standby status On at input of "H"
input to accept any function key in the standby status On at input of "H"
53
TUATTIN
I
Attenuate request signal input from the tuner unit
54
BUIN
I
Back up power supply detection signal input terminal "L" is input at low voltage
55
NCO
-
Not used
56
DAVN
I
Synchronize detection signal input of RDS data block (AEP, UK models only)
57
NCO
-
Not used
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