Read Sony XAV-7W (serv.man2) Service Manual online
53
XAV-7W
•
MAIN BOARD IC703 MB90F574APMT-G-388-BND1 (MASTER CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
COBOX ST
I
Connection box connection detection signal input from the display controller
“L”: connection box no connected, “H”: connection box connected
“L”: connection box no connected, “H”: connection box connected
2 to 4
NCO
O
Not used
5
ATT
O
Audio line and power amplifier muting on/off control signal output “H”: muting on
6
SYSRST
O
Reset signal output to the SONY bus interface and display controller “L”: reset
7
NCO
O
Not used
8
VCC
—
Power supply terminal (+5V)
9
NCO
O
Not used
10
TROM-SDA
I/O
Two-way data EEPROM bus with the tuner unit
11
TROM-SCL
I/O
EEPROM bus clock signal input/output with the tuner unit
12
RX
I
Input terminal for UART transfer data when writing into internal flash memory data
13
TX
O
Output terminal for UART transfer data when writing into internal flash memory data
14
BUS-ON
O
Bus on/off control signal output to the SONY bus interface and display controller
“L”: bus on
“L”: bus on
15
BEEP
O
Beep sound drive signal output
16
NAVI-ATT
I
Muting on/off control signal input at voice guide “H”: muting on Not used
17
UNISI
I
Serial data input from the SONY bus interface
18
UNISO
O
Serial data output to the SONY bus interface
19
UNICLK
O
Serial clock signal output to the SONY bus interface and display controller
20
MVOL RST
O
Reset signal output to the monitor internal electrical volume “L”: reset Not used
21
MVOL DAT
O
Serial data output to the monitor internal electrical volume Not used
22
MVOL CLK
O
Serial data transfer clock signal output to the monitor internal electrical volume Not used
23
NCO
O
Not used
24
SIRCS
I
Sircs remote control signal input
25 to 30
NCO
O
Not used
31
E-VOL-ATT
O
Muting on/off control signal output to the electrical volume “L”: muting on Not used
32
NCO
O
Not used
33
VSS
—
Ground terminal
34
C
—
Connected to coupling capacitor for the power supply
35
ADSO1
O
ADSO control signal output “L”: ADSO off/ADSO 1, “H”: ADSO 2/ADSO 3
36
ADSO2
O
ADSO control signal output “L”: ADSO off/ADSO 2, “H”: ADSO 1/ADSO 3
37
SHIFT
O
Oscillation frequency shift signal output to the power control
38
DVCC
—
Power supply terminal (+5V) (for D/A converter)
39
DVSS
—
Ground terminal (for D/A converter)
40, 41
NCO
O
Not used
42
AVCC
—
Power supply terminal (+5V) (for A/D converter)
43
AVRH
I
Reference voltage (+5V) input terminal (for A/D converter)
44
AVRL
I
Reference voltage (0V) input terminal (for A/D converter)
45
AVSS
—
Ground terminal (for A/D converter)
46, 47
KEYIN0, KEYIN1
I
Key input terminal (A/D input)
48
RC-IN0
I
Rotary remote commander key input terminal (A/D input)
49
KEYIN2
I
Key input terminal (A/D input)
50
QUALITY
I
Noise level detection signal input at SEEK mode (A/D input)
51
NCO
O
Not used
52
MPTH
I
Multi-path detection signal input terminal (A/D input) Not used
53
S-METER
I
FM and AM signal meter voltage detection signal input from the tuner unit
(A/D input)
(A/D input)
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