Block Diagram -Display Section - Sony CDX-GT440U Service Manual

CDX-GT440U/GT444U/GT447UE
4-2. BLOCK DIAGRAM – DISPLAY Section –
KEY MATRIX
LSW905–913,
S901–907
RE901
PUSH ENTER/SELECT
(VOLUME)
ROTARY
RE0
ENCODER
RE1
J801
(REMOTE IN)
X402
32.768kHz
X401
7.92MHz
REMOTE
CONTROL
SIGNAL 3
RECEIVER
IC902
CDX-GT440U/GT444U/GT447UE
SYSTEM CONTROL LCD DRIVER,LED CONTROL
IC401 (2/2) IC901
5
|
SEG48
39 KEY_IN1
50
I
55
64 SEG1
LCD_SO 49 DATA
KEY_IN0
40
60
LCD_SCK CLK LCD
50 63
LCD_CE 48 62 CE
COM4 51
46 KEY_ACK1 I
|
COM1
54
DIMMER 2
BLINK 4
11 RE_IN0
12 RE_IN1
RC_IN1
34
41 RC_IN0
45
KEY_ACK0
14 X_IN USB POWER
BATT SWITCH
Q502
13 X_OUT
USB POWER
92 OSC_OUT
CONTROL
Q501
93 OSC_IN
DD_ON 100
SYNC_OUT 99
95 SIRCS
USB_ON 21
7 NOSE_SW
USB_OVER
24
LCD901
LIQUID
PANEL+B
CRYSTAL
DISPLAY
PANEL
LED901
(LCD BACK LIGHT)
Q901
LCD BACK LIGHT
DIMMER
CONTROL
SWITCHING
REGULATOR
Q503
DC/DC CONVERTER
CONTROL DC/DC CONVERTER
IC502 IC501
D502
3 CLR
Q 5 1 RC DRV 6
2 B
CD
USB D+
MECHANISM
USB D–
UNIT
(MG-101Y)
(2/2)
16 16
LED903,905,907,909,910,912,
LED924,925,928,928
914,916,919,921,932,934,
(RING ILLUMINATION)
LSW905-913
Q907
LED
DRIVER
USB POWER
CONTROL SWITCH
IC503
L502
VIN VOUT 3
1
CONT
2
D505 D510
USB OVER
CURRENT DETECT
Q504,505
VBUS
S P
: USB
VBUS
CN902
1
D+
3
D–
2
4
(USB)