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JVC TH-A75 Service Manual page 27

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4.11 BA5983FM-X (IC201) : 4-channel driver
• Block diagram
27
26
28
Vcc
1
2
• Pin function
Pin No. Symbol
I/O
1
BIAS IN
I
Input for Bias-amplifier
2
OPIN1(+)
I
Non inverting input for CH1 OP-AMP
3
OPIN1(-)
I
Inverting input for CH1 OP-AMP
4
OPOUT1
O Output for CH1 OP-AMP
5
OPIN2(+)
I
Non inverting input for CH2 OP-AMP
6
OPIN2(-)
I
Inverting input for CH2 OP-AMP
7
OPOUT2
O Output for CH2 OP-AMP
8
GND
-
Substrate ground
9
STBY1
I
Input for CH1/2/3 stand by control
10
PowVcc1
-
Vcc for CH1/2 power block
11
VO2(-)
O Inverted output of CH2
12
VO2(+)
O Non inverted output of CH2
13
VO1(-)
O Inverted output of CH1
14
VO1(+)
O Non inverted output of CH1
15
VO4(+)
O Non inverted output of CH4
25
24
23
22
10k
10k
20k
10k
10k
10k
4
5
6
3
7
Description
30
21
20
19
Vcc
STAND BY
CH4
20k
10k
10k
STAND BY
CH1/2/3
Vcc
29
8
9
10
Pin No. Symbol
I/O
16
VO4(-)
O Inverted output of CH4
17
VO3(+)
O Non inverted output of CH3
18
VO3(-)
O Inverted output of CH3
19
PowVcc2
-
20
STBY2
I
21
GND
-
22
OPOUT3
O Output for CH3 OP-AMP
23
OPIN3(-)
I
24
OPIN3(+)
I
25
OPOUT4
O Output for CH4 OP-AMP
26
OPIN4(-)
I
27
OPIN4(+)
I
28
PreVcc
-
29
-
30
-
17
16
18
15
10k
10k
10k
10k
10k
10k
10k
10k
Level Shift
Level Shift
Level Shift
Level Shift
10k
10k
10k
10k
10k
10k
10k
11
12
13
14
Description
Vcc for CH3/4 power block
Input for Ch4 stand by control
Substrate ground
Inverting input for CH3 OP-AMP
Non inverting input for CH3 OP-AMP
Inverting input for CH4 OP-AMP
Non inverting input for CH4 OP-AMP
Vcc for pre block
Connect to ground
Connect to ground
(No.22009)1-27
TH-A75

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