JVC RX-9010VBK Service Manual page 26

RX-9010VBK
TC9459F (IC381, IC382, IC383, IC393) : Electronic volume control
1.Terminal layout
VSS 1
2
L-OUT
NC 3
4
L-IN
L-ch
5
L-LD1
L-LD2 6
7
L-A-GND
NC 8
9
CS1
NC 10
11
GND
CK 12
3.Pin function
Pin No. Symbol
1 VSS
2 L-OUT
3 NC
4 NC
5 L-LD1
6 L-LD2
7 L-A-GND
8 NC
9 CS1
10 NC
11 NC
12 CK
1-26
2. Block diagram
24
VDD
23
R-OUT
22
NC
21
R-IN
20 R-ch
R-LD1
19
R-LD2
18
R-A-GND
17
NC
16
CS2
15
NC
14
STB
13
DATA
Function
Negative power supply pin
Volume output pin
No connection
No connection
Loudness tap output pin
Loudness tap output pin
Analog GND pin
No connection
Chip select input pin
No connection
No connection
Clock input pin
VSS
1
2
L-OUT
3
NC
50k /
915TEP
4
L-1N
VR
5
L-LD1
6
L-LD2
7
L-A-GND
8
NC
L-ch 7 to 91
decoder
L-ch data
latch circuit
Shift register (24BIT)
Level shift circuit
CS1 9
NC
10
GND
11
CK
12
Pin No. Symbol
13 DATA
14 STB
15 NC
16 CS2
17 NC
18 R-A-GND
19 R-LD2
20 R-LD1
21 R-IN
22 NC
23 R-OUT
24 VDD
VDD
24
R-OUT
23
NC
22
R-IN
21
Same as L-ch
R-LD1
20
Circuit
19 R-LD2
R-A-GND
18
NC
17
R-ch 7 to 91
decoder
R-ch data
latch circuit
CS2
16
15 NC
14 STB
13 DATA
Function
Data input pin
Strobe input pin
No connection
Chip select input pin
No connection
Analog GND pin
Loudness tap output pin
Loudness tap output pin
Volume input pin
No connection
Volume output pin
Positive power supply pin