Block Diagram -Display Section - Sony CDX-GT48UM Service Manual

CDX-GT48UM/GT480U/GT480US/GT484US
4-2.
LSW901,905–913,
CDX-GT48UM/GT480U/GT480US/GT484US
BLOCK DIAGRAM – DISPLAY Section –
SYSTEM CONTROL
IC401 (2/2)
39 KEYIN1
KEY MATRIX
LCD_SO
S902–908 40 KEYIN0
LCD_SCK
LCD_CE
46 KEYACK1
RE901
PUSH ENTER/SELECT
(VOLUME)
ROTARY
RE0
11 RE-IN0
ENCODER
RE1
12 RE-IN1
34 RC IN1
J801
41 RC IN0
(REMOTE IN)
AREA SEL2
45 KEYACK0
14 XIN
X402
32.768kHz
13 XOUT
92 OSCIN
X401
7.92MHz
93 OSCOUT
DD ON
REMOTE
SYNC OUT
CONTROL
SIGNAL 3 95 SIRCS
RECEIVER
IC902
USB ON
7 NOSE_SW
USB OVER
LCD DRIVER,LED CONTROL
IC901
5
|
SEG48
50 LCD901
I
•
55
49 64 DATA SEG1 LIQUID
PANEL+B
•
60
50 63 CLK LCD CRYSTAL
DISPLAY
48 62 CE
PANEL
COM4 51
I
|
COM1
54
DIMMER 2
BACK-LIGHT 1
BLINK 4
FM(200K)
BU+3.3V AM(10K)
55
FM(50K)
AM(9K)
S402
FREQUENCY
SELECT
USB POWER
SWITCH
BATT
Q502
USB POWER
DC/DC CONVERTER
CONTROL
CONTROL DC/DC CONVERTER
Q501
IC501
IC502
D502
3 CLR
100
Q 1 RC
5
99 2 B
21
24
16 16
LED926-929 (GT48UM)
LED907,911,913-915,
LED901 LED928,932,935
922,924,925,930,931,
(LCD BACK LIGHT) (GT480U/GT480US/GT484US)
(RING ILLUMINATION)
Q901
Q907
LCD BACK LIGHT
LED
DIMMER
DRIVER
CONTROL
Q902
LCD BACK
LIGHT
CONTROL
USB POWER
CONTROL SWITCH
SWITCHING
L502
REGULATOR VIN
1
Q503
DRV
6
D505 D510
USB OVER
CURRENT DETECT
Q504,505
CD
USB D+
MECHANISM
USB D–
UNIT
(MG-101Y)
(2/2)
LSW901,905-913
IC503
VOUT 3 VBUS
CONT
2
• Signal Path
: USB
VBUS
1 CN902
D+
3
D–
2
4
(USB)