Read Sony SS-US301 / SW-US301 / UZ-US301 Service Manual online
23
SS-US301/SW-US301/UZ-US301
• IC Pin Function Description
MAIN BOARD IC801
µ
PD780022AGK-C02-9ET (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
H/P-S/W
I
Headphone detection signal input terminal “H”: headphone in
2
H/P-MUTE
O
Headphone muting on/off control signal output terminal “H”: muting on
3
S-HIGH
O
LED drive signal output of sound mode high indicator “H”: LED on
4
S-LOW
O
LED drive signal output of sound mode low indicator “H”: LED on
5
GRN-LED
O
LED drive signal output of power on indicator “H”: LED on
6
V-7
O
LED drive signal output of volume 7 indicator “H”: LED on
7
V-6
O
LED drive signal output of volume 6 indicator “H”: LED on
8
V-5
O
LED drive signal output of volume 5 indicator “H”: LED on
9
VSS
—
Ground terminal
10
VDD
—
Power supply terminal (+5V)
11
V-4
O
LED drive signal output of volume 4 indicator “H”: LED on
12
V-3
O
LED drive signal output of volume 3 indicator “H”: LED on
13
V-2
O
LED drive signal output of volume 2 indicator “H”: LED on
14
V-1
O
LED drive signal output of volume 1 indicator “H”: LED on
15
USB-LED
O
LED drive signal output of USB indicator “H”: LED on
16
RED-LED
O
LED drive signal output of standby indicator “H”: LED on
17 to 23
—
—
Not used
24
VDD
—
Power supply terminal (+5V)
25
AVSS
—
Ground terminal (for A/D converter)
26, 27
KEY1, KEY2
I
Top panel key input terminal (A/D input)
28 to 32
—
—
Not used
33
AUDIO-DET
I
Audio level detection signal input terminal for auto power control
34
AVREF
I
Reference voltage (+5V) input terminal (for A/D converter)
35
AVDD
—
Power supply terminal (+5V) (for A/D converter)
36
RESET
I
System reset signal input from the reset signal generator “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
37, 38
—
—
Not used
39
IC (VPP)
—
Not used
40
X2
O
System clock output terminal (8.38 MHz)
41
X1
I
System clock input terminal (8.38 MHz)
42
VSS1
—
Ground terminal
43
STOP
I
AC cut detection signal input terminal
44
INT
I
Top key input detection signal input terminal with power save mode
45
—
—
Not used
46
P-CON
O
Power on/off control signal output terminal “H”: power on
47
READY-H
O
Power on/off control signal output terminal with auto power control “H”: power on
48
AMP-MUTE
O
Muting on/off control signal output to the amplifier circuit “H”: muting on
49
VOL2-DATA
O
Serial data output to the electrical volume (for center and sub woofer)
50
VOL2-CLK
O
Serial data transfer clock signal output to the electrical volume (for center and sub woofer)
51
LINE-MUTE
O
Line muting on/off control signal output terminal (for front L-ch and R-ch, sub woofer)
“H”: muting on
“H”: muting on
52
VOL1-DATA
O
Serial data output to the electrical volume (for front L-ch and R-ch)
53
VOL1-CLK
O
Serial data transfer clock signal output to the electrical volume (for front L-ch and R-ch)
54
S-TRB
O
Muting on/off control signal output to the 3D sound processor “H”: muting on
55
USB-H
O
Input selection signal output terminal “L”: AUDIO IN, “H”: USB
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