Sony MEX-BT3800U / MEX-BT3807U / MEX-BT3850U / MEX-BT38UW Service Manual ▷ View online
MEX-BT38UW/BT3800U/BT3807U/BT3850U
MEX-BT38UW/BT3800U/BT3807U/BT3850U
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21
SECTION 4
DIAGRAMS
4-1. BLOCK DIAGRAM - AUDIO Section (1/2) -
(Page 22)
(Page 23)
xSIGNAL PATH
: USB
: CD PLAY
: AUDIO
: Bluetooth
: MIC
xR-ch is omitted due to same as L-ch.
CN902
CN501
D400
2
3
CD MECHANISM
DECK
(MG-101Z-188//Q)
SENSOR
BOARD
SERVO BOARD
BT BOARD
(PATTERN ANTENNA)
MIC801
AU_LCH
RXD (MC-BUS)
CD_ON
CDM_ON
VBUS_ON
60 MC_TX
84 CD_ON
85 CDM_ON
75 VBUS_ON
84 CD_ON
85 CDM_ON
75 VBUS_ON
TXD (MC-BUS)
D- (USB)
D+ (USB)
59 MC_RX
XSYS_RST
BT_ON
BT_ON
SYS_RST
SYS_RST
BU_CHECK
BU_CHECK
AU_ATT
AU_RCH
R-CH
BT_AUDIO_L
BT_AUDIO_R
R-CH
Z_MUTE
EJECT_OK
WAKE_UP
62 Z_MUTE
70 EJECT_OK
43 WAKE_UP
70 EJECT_OK
43 WAKE_UP
88 XBT_MIC_SEL
51 XMD2
89 BT_MIC_DET
53 MD0
D801
D802
D472
D502
5
3
7
F_WRITE
(NC)
NCO
TX
4
RX
1
RESET
RESET
SWITCH
Q598
INVERTER
Q599
MUTING
CONTROL
Q493
78 FLASHEN1
2
CLK
61 XTEST_IN
INVERTER
Q597
XEXT_A
TT_XEN
42
AT
T
64
BT_MUTE
MUTING
CONTROL
Q490
BT_A
TT_XEN
74
MIC AMP
IC813 (1/2)
SYSTEM CONTROLLER
IC501 (1/3)
NOISE FILTER
IC813 (2/2)
AUDIO
+8.5V
MIC
+3.3V
+3.3V
MIC B+
MIC_IN-
MIC_IN+
MIC
AMP
IC814
MIC AMP
Q824, 825
GAIN
CONTROL
Q862
B+ SWITCH
Q820 - 822
MIC INPUT
SELECT
IC812
J801
MIC IN
BT_TEST1
BT_TEST2
BT_TEST2
BT_MFUNC
BT_FF
BT_FR
BT_TEST1
19
BT_TEST2
18
BT_MFUNC
10
BT_FF
3
BT_FR
2
BT_PLAY
BT_CVC
BT_INT-HF
BT_STATUS0
BT_STATUS1
BT_STATUS1
BT_PLAY
1
BT_CVC
97
BT_MUTE
BT_MUTE
94
BT_INT_HF
96
BT_OPRPOW
BT_POW_ON
BT_OPRPOW
11
BT_RESET
XBT_RESET
9
BT_STATUS_POW
12
BT_STATUS0
5
BT_STATUS1
6
BT_STATUS2
BT_STATUS2
7
BT_STATUS3
BT_STATUS3
8
B
BT-L
ATT
CD-L
A
MUTING
CONTROL
Q470, 471
+
SWITCH
Q823
MEX-BT38UW/BT3800U/BT3807U/BT3850U
MEX-BT38UW/BT3800U/BT3807U/BT3850U
22
22
R-CH
15
16
X1
4MHz
XTAL2
XTAL1
8
LOUT
A
R-CH
J901 (1/2)
BUS AUDIO
IN
L
R
ELECTRICAL VOLUME, INPUT SELECT
IC401
SYSTEM CONTROLLER
IC501 (2/3)
OUT_FLCH 34
OUT_RLCH 32
OUT_SLCH 30
R-CH
R-CH
FL+
FL–
4
1
9
FR+
FR–
2
12
RL+
CN701 (1/2)
POWER AMP
IC301 (1/2)
RL–
RR+
11
10
3
RR–
R-CH
R-CH
MUTING
Q480
MUTING
Q485
MUTING
Q483
xSIGNAL PATH
: TUNER
: CD PLAY
: AUDIO
: AUX IN
: BUS AUDIO IN
xR-ch is omitted due to same as L-ch.
IN-RL
11
IN-FL
12
I2C_SIO
2
I2C_SCK
4
OUT-RL- 7
OUT-RL+ 9
OUT-FL- 3
OUT-FL+ 5
R-CH
J901 (2/2)
J401
AUDIO OUT
FRONT
L
AUDIO OUT
REAR
SUB OUT
(MONO)
R
L
R
DIAG
25
STB
22
BEEP
16
J901
AUX
9
ROUT
R-CH
SDA
19
SCL
18
RSSI
14
PLL
IC1
L6
FM MIX
FMIN1
4
FMIN2
3
AMRFIN
1
AMSELIN2
29
AMSELIN1
28
AMSELOUT1
31
AMSELOUT2
32
MPXIN
12
MPXOUT
13
37
VSM
22
I2C_SIO
23
I2C_SCK
98
ZAPPIN_BEEP
69
XDIAG
68
AMP_STB
100
BEEP
J1
(ANTENNA IN)
CD_LCH
6
BT_LCH
CD-L
ATT
BT-L
12
BUS_LCH
2
AUX_LCH
9
TU_LCH
4
ZAP_BEEP
13
I2C_SIO
38
I2C_SCK
37
ZAP_BEEP
16
4-2. BLOCK DIAGRAM - AUDIO Section (2/2) -
(Page 21)
MEX-BT38UW/BT3800U/BT3807U/BT3850U
MEX-BT38UW/BT3800U/BT3807U/BT3850U
23
23
LIQUID
CRYSTAL
DISPLAY
LCD901
LIQUID CRYSTAL DISPLAY DRIVER
IC901
SYSTEM CONTROLLER
IC501 (3/3)
BU B+
D600
D601
TH600
BATTERY
CHECK
Q600
SEG52,
SEG2 - SEG48
SEG2 - SEG48
48
S101
RESET
SONY BUS INTERFACE
IC601
UNISO
56
DATA_IN 9
UNISI
55
DATA_OUT 8
DATA_I/O
6
UNSCK
57
CLK_IN 11
CLK
4
XBUS_ON
83
BUS_IN 12
BUS_ON
1
XSYS_RST
86
XRST 13
RST
2
BATT
3
4
5
2
6
7
CNJ600
BUS CONTROL IN
BU_CHECK 10
20
20
BU_CHECK
67
XRESET
54
XNOSE_SW
20
KEY_IN0, KEY_IN1
LSW905 - 913 (2/2),
RE901 (1/2),
S901 - 907
(FRONT PANEL KEY)
XRC_IN1
34
RC_IN0
41
J701
REMOTE IN
(VOLUME)
X502
32.768kHz
13
14
X_OUT
X_IN
92
93
X501
7.92MHz
OSC_OUT
OSC_IN
28
BU +3.3V
AREA_SEL2
S502
SIRCS 95
D505
REMOTE
CONTROL
RECEIVER
IC902
LED DRIVE
Q901
LED901
(LCD BACK LIGHT)
LED924, 925, 928, 929
(RING ILLUMINATION)
(RING ILLUMINATION)
LED905
(DISC SLOT INDICATOR)
LED907, 909, 932, 934
(ILLUMINATION)
26 RE_IN0
27 RE_IN1
27 RE_IN1
ROTARY
ENCODER
RE901 (2/2)
45 XKEY_ACK0
46 XKEY_ACK1
XSYS_RST
BU_CHECK
SYS_RST
BU +3.3V
CN901
CN101
RESET SIGNAL
GENERATOR
IC503
10k
9k
FREQUENCY
SELECT
60, 55, 50 - 5
COM1 - COM4
4
54 - 51
2
2
LCD_DATA 64
LCD_CLK 63
LCD_CE 62
LCD_SO
49
LCD_SCK
50
LCD_CE
48
LED903, 910, 912, 914,
LED916, 919, 921,
LSW905 - 913 (1/2)
(KEY ILLUMINATION)
BLINK
4
DIMMER
2
LED DRIVE
Q907
40, 39
BT_ON
LCD +9V
B
KEY0
ACC
13
7
ATT
AMP-R
AMT-R
AMT-R
5
6
6
+B
19
BU B+
REGULATOR
IC301 (2/2)
CN701 (2/2)
AUDIO+B(8.5V)
30
VP2 6
ANT-REM
AUDIO +8.5V
27
AMP-REM 29
MECHA-6V
33
CD +6V
PANEL+B
34
LCD +9V
VBUS
BU+B
37
BU +3.3V
BU +5V
VP1 20
SERVO-3.3V
31
CD +3.3V
+3.3V
REGULATOR
IC502
ACCESSORY
CHECK
Q703
XACC_IN 82
TEL_ATT 81
BT +3.3V
+3.3V
REGULATOR
IC801
VP 35
MIC +3.3V
B+ SWITCH
Q826, 827
REGULATOR
CONTROL
Q802, 803
LEVEL SHIFT
Q701
BT_POWER_CTRL
DD_ON
4
80
BT_MIC_POW 87
DC/DC CONVERTER
IC851,
Q851 - 854, 861
USB POWER
ON/OFF SWITCH
IC852
XUSB_OVR 76
USB_ON 79
(BT3850U: E)
4-3. BLOCK DIAGRAM - PANEL, POWER SUPPLY Section -
(Page 21)
MEX-BT38UW/BT3800U/BT3807U/BT3850U
MEX-BT38UW/BT3800U/BT3807U/BT3850U
24
24
• Circuit Boards Location
For Schematic Diagrams.
Note:
• All capacitors are in μF unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics
• All capacitors are in μF unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in
and
1
/
4
W or less unless otherwise
specifi ed.
• f : internal component.
• C : panel designation.
• C : panel designation.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
(In addition to this, the necessary note is printed in each block.)
• A : B+ Line.
• Power voltages is dc 14.4V and fed with regulated dc
• Power voltages is dc 14.4V and fed with regulated dc
power supply from ACC and BATT cords.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : TUNER
( ) : CD PLAY
• Voltages are taken with a VOM (Input impedance 10 M
( ) : CD PLAY
• Voltages are taken with a VOM (Input impedance 10 M
).
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
Voltage variations may be noted due to normal production
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F :
F :
AUDIO
f :
TUNER
J
: CD PLAY
p : Bluetooth
l : USB
N :
l : USB
N :
MIC
E :
AUX
IN
a : BUS AUDIO IN
• Abbreviation
CND : Canadian model
EA
CND : Canadian model
EA
: Saudi Arabia model
For Printed Wiring Boards.
Note:
• X : Parts extracted from the component side.
• Y : Parts extracted from the conductor side.
• W : Indicates side identifi ed with part number.
• f : Internal component.
•
• X : Parts extracted from the component side.
• Y : Parts extracted from the conductor side.
• W : Indicates side identifi ed with part number.
• f : Internal component.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Parts face side:
(SIDE A)
Pattern face side:
(SIDE B)
Parts face side:
(SIDE A)
Pattern face side:
(SIDE B)
Parts on the parts face side seen from
the pattern face are indicated.
Parts on the pattern face side seen
from the parts face are indicated.
the pattern face are indicated.
Parts on the pattern face side seen
from the parts face are indicated.
Caution:
Parts face side:
(Conductor Side)
Pattern face side:
(Component Side)
Parts face side:
(Conductor Side)
Pattern face side:
(Component Side)
Parts on the parts face side seen from
the pattern face are indicated.
Parts on the pattern face side seen
from the parts face are indicated.
the pattern face are indicated.
Parts on the pattern face side seen
from the parts face are indicated.
Note:
The components identi-
fi
The components identi-
fi
ed by mark 0 or dotted
line with mark 0 are criti-
cal for safety.
Replace only with part
number specifi ed.
cal for safety.
Replace only with part
number specifi ed.
Note:
Les composants identifi és
par une marque 0 sont
critiques pour la sécurité.
Ne les remplacer que par
une piéce portant le nu-
méro spécifi é.
Les composants identifi és
par une marque 0 sont
critiques pour la sécurité.
Ne les remplacer que par
une piéce portant le nu-
méro spécifi é.
• Abbreviation
CND : Canadian model
EA
CND : Canadian model
EA
: Saudi Arabia model
• Indication of transistor.
C
B
These are omitted.
E
Q
MAIN board
SENSOR board
SERVO board
KEY board
JACK board
– main unit –
– front panel –
BT board
ANTENNA board
• Waveforms
– MAIN Board –
2
IC501 os (OSC_OUT)
1 V/DIV, 50 ns/DIV
126 ns
3.8 Vp-p
30.4
Ps
1.3 Vp-p
1
IC501 qd (X_OUT)
500 mV/DIV, 10
Ps/DIV
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