JVC MX-DVA5 Service Manual page 27

BA5983FM (DIC1) : CD-ROM 4ch BTL Driver
1.Pin layout
BIAS
OPIN1(-)
OPIN18(+)
OPOUT8(-)
OPIN2(+)
OPIN2(-)
OPOUT2(-)
GND
STBY1
PowVcc1 10
VO2(-)
11
VO2(+)
12
VO1(-) 13
VO1(+) 14
2.Block diagram
28 27 26
25
–
+
Vcc
+
–
2 3 4
1
3.Pin function
Pin No. Symbol
I/O
1 BIAS IN I
I
2 OPIN
3 OPIN I
O
4 OPOUT
I
5 OPIN2
I
6 OPIN2
O
7 OPOUT2
8 GND -
I
9 STBY1
-
10 PowVcc1
O
11 VO2
O
12 VO2
13 VO1 O
O
14 VO1
1 28 PreVcc
OPIN4(+)
2 27
3 26 OPIN4(-)
4 25 OPOUT4
5 24 OPIN3(+)
6 23 OPIN3(-)
OPOUT3
7 22
8 21 GND
9 20 STBY2
19 PowVcc
VO3(-)
18
VO3(+)
17
16 VO4(-)
15 VO4(+)
23
24 22
–
+
+
–
5 6
7
Function
Input for Bias-amplifier
Non inverting input for ch1
Inverting input for ch1
Output for ch1 op-amp
Non inverting input for ch2
Inverting input for ch2
Output for fh2 op-amp
Substrate ground
Input for ch1/2/3
Vcc for ch1/2 power block
Inverted output of ch2
Non inverted output of ch2
Inverted output of ch1
Non inverted output of ch1
21
19
20
Vcc
STAND BY
CH 4
STAND BY
CH 1/2/3
Vcc
8
9
10
Symbol
Pin No. I/O
15 Non Inverted output of ch4
VO4 O
16 Inverted output of ch4
O
VO4
17 O Non inverted output ch3
VO3
18 Inverted output of ch3
O
VO3
19 Vcc for ch3/4 power block
-
PowVcc2
20 Input for ch4 stand by control
STBY2 I
21 Substrate ground
-
GND
22 O Output for ch3 op-amp
OPOUT3
23 Inverting input for ch3 op-amp
I
OPIN3
24 Non inverting input for ch3
I
OPIN3
25 Output for ch4 op-amp
OPOUT4 O
26 Inverting input for ch4 op-amp
I
OPIN4
27 I Non inverting input for ch4
OPIN4
28 Vcc for pre block
-
PreVcc
MX-DVA5
18 17 16 15
– + + – +
–
+
–
Level
shift
Level
shift
Level
shift
Level
shift
–
– + +
+ –
14
12 13
11
Function
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