Read Sony MEX-BT4700U / MEX-BT4750U Service Manual online
MEX-BT4700U/BT4750U
MEX-BT4700U/BT4750U
22
22
4-3. BLOCK DIAGRAM - PANEL, POWER SUPPLY Section -
LIQUID
CRYSTAL
DISPLAY
LCD901
LIQUID CRYSTAL DISPLAY DRIVER
IC981
SYSTEM CONTROLLER
IC501 (3/3)
BU B+
D600
D601
BATTERY
CHECK
Q600
S5 - S64
64
S101
RESET
XSYS_RST
86
BU_CHECK
67
XRESET
54
XNOSE_SW
20
KEY_IN0, KEY_IN1
S201, 951 - 967
(FRONT PANEL KEY)
XRC_IN1
34
RC_IN0
41
J701
REMOTE IN
(VOLUME)
X502
32.768kHz
13
14
X_OUT
X_IN
93
92
X501
7.92MHz
OSC_OUT
OSC_IN
28
BU +3.3V
AREA_SEL2
S502
SIRCS 95
D505
REMOTE
CONTROL
RECEIVER
IC982
LED DRIVE
Q991
LED991, 992
(LCD BACK LIGHT)
LED901 - 921, 924
(KEY 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
RESET SIGNAL
GENERATOR
IC503
10k
9k
FREQUENCY
SELECT
3 - 64, 69, 74
COM1 - COM4
4
65 - 68
DI 78
CL 77
CE 76
LCD_SO
49
LCD_SCK
50
LCD_CE
48
DIMMER
79
LED201
LED202
(DISC SLOT ILLUMINATION)
RING
80
LED DRIVE
Q993
40, 39
BT_ON
DOOR_SW
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
RDS +3.3V
B+ SWITCH
Q52
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
SYNC_OUT 99
RDS_ON 58
BT_MIC_POW 87
DC/DC CONVERTER
IC851,
Q851 - 854, 861
USB POWER
ON/OFF SWITCH
IC852
DC/DC
CONVERTER
CONTROL
IC853
XUSB_OVR 76
USB_ON 79
(BT4750U: E, Mexican, Indian)
(BT4700U)
S102
(NOSE DETECT)
XDOOR_SW
21
S971
(FRONT PANEL OPEN/CLOSE DETECT)
DOOR_IND
24
BATTERY
CHECK
Q604, 605
LED DRIVE
Q589, 590
ILL
14
DIMMER
DETECT
DETECT
Q702
XILL_IN 63
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(Page 20)
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