Sony CDX-GT490US - Block Diagram -Display Section

CDX-GT49UM/GT490U/GT490US/GT494U CDX-GT49UM/GT490U/GT490US/GT494U
1616
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4-2. BLOCK DIAGRAM – DISPLAY Section –
X402
32.768kHz
14 13 39
49 50 48
40
SYSTEM CONTROL
IC401 (2/2)
LCD DRIVER,LED CONTROL
IC901
KEY_IN1
CLK
LCD
CE
LCD_SO
LCD_SCK
LCD_CE
KEY_IN0
46
KEY_ACK1
11
RE_IN0
RE0 RE1
12
RE_IN1
EXCEPT EA MODEL
X_OUT X_IN
X401
7.92MHz
92 93
OSC_IN
7
NOSE_SW OSC_OUT
63 64 62
DIMMER
2
BLINK
4
COM4
I
COM1
LCD901
LIQUID
CRYSTAL
DISPLAY
PANEL
5
|
50

55

60
51
|
54
SEG48
I
SEG1
DATA
PANEL+B
KEY MATRIX
LSW905–913,
S901–907
(VOLUME)
PUSH ENTER/SELECT
RE901
ROTARY
ENCODER
95
SIRCS
REMOTE
CONTROL
SIGNAL
RECEIVER
IC902
Q907
LED
DRIVER
Q901
LCD BACK LIGHT
DIMMER
CONTROL
LED903,905,907,909,910,912,
914,916,919,921,932,934,
LSW905-913
LED924,925,928,928
(RING ILLUMINATION)
LED901
(LCD BACK LIGHT)
3
USB POWER
CONTROL SWITCH
IC503
99
SYNC_OUT
24
USB_OVER
21
USB_ON
BATT
100
DD_ON
VIN
VBUS
1
3
VOUT
D505
L502
DC/DC CONVERTER
CONTROL
IC502
CD
MECHANISM
UNIT
(MG-101Y)
(2/2)
USB D+
USB D–
3
CLR
2
B
5
Q
DC/DC CONVERTER
IC501
6
DRV
1
RC
2
CONT
USB POWER
SWITCH
Q502
USB POWER
CONTROL
Q501
SWITCHING
REGULATOR
Q503
D510
USB OVER
CURRENT DETECT
Q504,505
1 3 2
VBUS
D+
D–
4
CN902
(USB)
D502
34
RC_IN1
45
KEY_ACK0
41
RC_IN0
J801
(REMOTE IN)
55
AREA_SEL2
BU+3.3V
S402
FREQUENCY
SELECT
FM(200K)
AM(10K)
FM(50K)
AM(9K)
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: USB