Block Diagram -Display Section - Sony CDX-GT420U Service Manual

CDX-GT420U/GT424U/GT427UE/GT470U/GT470US
Ver. 1.1
5-2. BLOCK DIAGRAM – DISPLAY Section –
KEY MATRIX
LSW907–917,
S901–906
RE901
PUSH ENTER/ SELECT
(VOLUME)
ROTARY
ENCODER
J370
(REMOTE IN)
PANEL+B
MAIN
A
RESET
SECTION
(Page 23)
BU+3.3V
CDX-GT420U/GT424U/GT427UE/GT470U/GT470US
SYSTEM CONTROL
IC501 (2/2)
95 KEYIN0
94 KEYIN1
92 KEYACK1
LCD DATA 1
LCD CLK 2
LCD CE 100
82 RE–IN0
81 RE–IN1
91 KEYACK0
43 RC IN1
97 RC IN0
REMOTE CONTROL
SIRCS
SIGNAL RECEIVER 4
IC971
XIN 10
X502
32.768kHz
XOUT 11
OSCOUT 13
X501
11.06MHz
OSCIN 15
RESET
12 RESET
IC602
S103
RESET
BATT
DD ON 40
SYNC OUT 28
BU+3.3V
USB ON 27
USB OVER 25
FM(200k)
MW(10k)
S501
70 AREASEL2
FREQUENCY
SELECTOR FM(50k)
MW(9k)
DOOR SW 24
E,IND,MX MODEL
LCD DRIVE
IC901
LCD901
LIQUID CRYSTAL
DISPLAY PANEL
64 DI PANEL+B
63 CL
62 CE
BACK PANEL
DIMMER
DIMMER
2 SWITCH
Q931
LCD
BACK LIGHT
BACK LIGHT
1
DRIVE
Q932
BLINK 4
USB POWER USB+7.3V
SWITCH
Q807
USB POWER
CONTROL SWITCH
Q808
D/D CONVERTER D/D CONVERTER
CONTROL SWITCH VBUS POWER SWITCH
IC805 IC803
D805
3 CLR
Q 5 1 RC DRV 6
2 B
24 24
PANEL+B
LED931
LED941–946,LED951–953,
LCD
LSW909–917,
PANEL+B
LED951–953
(RING ILLUMINATION)
LED DRIVE
Q801
USB POWER
CONTROL SWITCH
IC804
USB+5V
L802
2
SWITCH
REG
• IN OUT
Q811
Q806 3
USB POWER
D807 CONTROL SWITCH
Q809
VOLTAGE
DETECT
Q810
4 EN
5 OC
CD
c
USB D–
MECHANISM
c
UNIT USB D+
(MG-101I)
(2/2)
• Signal Path
c
: USB
• Abbreviation
IND: Indian model
MX: Mexican model
6
•
7 V–BUS
•
8
CN902
1
CN902
2
3
4
(USB)