Read Sony CDX-V4800 Service Manual online
17
17
CDX-V4800
CDX-V4800
3-3. BLOCK DIAGRAM — KEY SECTION —
3-4. CIRCUIT BOARDS LOCATION
KEY
ACKNOWLEDGE
SWITCH
Q800
X801
32.768kHz
79
80
82
83
38
28
29
27
39
47
75
77
KEY_IN0
CLK
CE
LCD_SO
LCD_SCK
LCD_CE
DIMMER
KEY_IN1
KEY_ACK
46 DST SEL
(XKEY ON)
72 DOOR_SW
RESET
2 IN
1
OUT
X1A
X0A
X0
X1
X800
18.432MHz
S802
RESET
S800
9K
10K
FREQUENCY
SELECTOR
63
64
62
1
LCD901
LIQUID
CRYSTAL
DISPLAY
LED932
LCD
BACK LIGHT
Q931
D801
5
I
50
•
54
I
51
|
S2
S47
COM1
COM4
|
CL
DI
CE
DISP+B
65
SIRCS
IR
LED945–953,957–960
LSW901–903,907,909,910,920
REMOTE CONTROL
SIGNAL RECEIVER
IC971
2 OUT
U COM+3.3V
LED941–944
(VOLUME ILLUMINATE)
(
)
KEY MATRIX
S904,906,908,911–919
LSW901–903,907,909,910,920
RE901(2/2)
21
22
RE0
RE1
ROTARY
ENCODER
RE901(1/2)
RESET
IC802
CN800
CN901
BACK-LIGHT
2
DIMMER
LED
DRIVER
Q932
DISPLAY CONTROL
IC901
SYSTEM CONTROL
IC801 (3/3)
MAIN board
AUX JACK board
KEY board
SENSOR board
SERVO board
SPEAKER board
tuner unit
(TUX601)
(TUX601)
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