Read Sony WX-VX55 / WX-VX55S Service Manual online
WX-VX55/VX55S
WX-VX55/VX55S
25
25
6-3. BLOCK DIAGRAM – KEY Section –
KEY
ACKNOWLEDGE
SWITCH
Q800
X801
32.768kHz
79
80
82
83
38
28
29
27
29
27
39
47
75
77
LCD DRIVE
IC2
KEY_IN0
CLK
CE
CE
LCD_SO
LCD_SCK
LCD_CE
DIMMER
KEY_IN1
KEY_ACK
(XKEY ON)
RST
2 IN
1
OUT
X1A
X0A
X0
X1
X800
18.432MHz
S22
RESET
S250
(CD)
77
78
76
1
LCD1
LIQUID
CRYSTAL
DISPLAY
D48 – 50
LCD
BACK LIGHT
D801
6
I
64
•
65
I
68
|
S1
S59
COM1
COM4
|
CL
DI
CE
65
SIRCS
IR
D51,52,55,56,59,60,
D63,64,67,68,71,72,
D75,76,79,80,83,84,87,
D251,252,255
D63,64,67,68,71,72,
D75,76,79,80,83,84,87,
D251,252,255
D43
;EJECT
(CASSETTE)
REMOTE CONTROL
SIGNAL RECEIVER
IC1
1 OUT
U COM+3.3V
(
)
D44 – 47
VOLUME
ILLUMINATION
(
)
KEY MATRIX
S2 – 21
21
22
SYSTEM CONTROL
IC801 (3/3)
RE_0
RE_1
ROTARY
ENCODER
S1
VOLUME/
PUSH DIAL
SELECT
RESET
IC802
D257
(CAS SLOT)
P3/S3
LED
DRIVER
Q40
2
KEY
ILLUMINATION
(
)
P4/S4
LED
DRIVER
Q42
D53,54,57,58,61,62,
D65,66,69,70,73,74,
D77,78,81,82,85,86,88,
D253,254,256
D65,66,69,70,73,74,
D77,78,81,82,85,86,88,
D253,254,256
3
KEY
ILLUMINATION
(
)
P5/S5
ILL+B
VDD
LED
DRIVER
Q41
;
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