Goldstar ffh-8900a Service Manual internal block diagram of ics
INTERNAL BLOCK DIAGRAM OF ICs
BU2090/BU2090F/BU2090FS/BU2092/BU2092F
KIA78XXPI
- 26 -
KIA6289N
TDA7439
- 27 -
KIA4558P, KIA4558F |
KA8301 |
DRIVER
PRE LOGIC
1 |
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2 |
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3 |
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4 |
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5 |
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6 |
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7 |
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8 |
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9 |
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10 |
GND |
Vout1 |
Vz1 |
Vr |
Fin |
Rin |
Vcc1 |
Vcc2 |
Vz2 |
Vout2 |
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BA3126N
- 28 -
KA3010
28 27 26 25 24 23 22
BUY |
10K |
LEVEL |
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SHIFT |
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T S D |
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REGULATOR |
MUTE |
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LEVEL |
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10K |
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SHIFT |
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BUY |
|
10K |
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100K |
50K |
50K |
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1 |
2 |
3 |
4 |
5 |
6 |
7 |
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21 20 19 18 17 16 15
10K |
BUY |
LEVEL
SHIFT
LEVEL
SHIFT
10K
8 9 10 11 12 13 14
PIN DESCRIPTION
Pin No. |
Symbol |
I/O |
Description |
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1 |
DO1.1 |
O |
DRIVE OUTPUT |
|
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|
|
2 |
DO1.2 |
O |
DRIVE OUTPUT |
|
|
|
|
3 |
DI1.1 |
I |
DRIVE INPUT |
|
|
|
|
4 |
DI1.2 |
I |
DRIVE INPUT |
|
|
|
|
5 |
REG |
|
REGULATOR |
|
|
|
|
6 |
REO |
O |
REGULATOR OUTPUT |
|
|
|
|
7 |
MUTE |
|
MUTE |
|
|
|
|
8 |
GND1 |
|
GROUND |
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|
|
|
9 |
DI2.1 |
I |
DRIVE INPUT |
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|
|
|
10 |
DI2.2 |
I |
DRIVE INPUT |
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|
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11 |
DO2.1 |
O |
DRIVE OUTPUT |
|
|
|
|
12 |
DO2.2 |
O |
DRIVE OUTPUT |
|
|
|
|
13 |
GND2 |
|
GROUND |
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|
|
|
14 |
OPOUT |
O |
OPAMP OUTPUT |
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|
|
15 |
OPIN (-) |
I |
OPAMP OUTPUT (-) |
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|
|
16 |
OPIN (+) |
I |
OPAMP INPUT (+) |
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|
|
|
17 |
DO3.1 |
O |
DRIVE OUTPUT |
|
|
|
|
18 |
DO3.2 |
O |
DRIVE OUTPUT |
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|
|
|
19 |
DI3.1 |
I |
DRIVE INPUT |
|
|
|
|
20 |
DI3.2 |
I |
DRIVE INPUT |
|
|
|
|
21 |
VCC1 |
|
SUPPLY VOLTAGE |
|
|
|
|
22 |
VCC2 |
|
SUPPLY VOLTAGE |
|
|
|
|
23 |
VREF |
|
2.5V BIAS VOLTAGE |
|
|
|
|
24 |
DI4.1 |
I |
DRIVE INPUT |
|
|
|
|
25 |
DI4.2 |
I |
DRIVE INPUT |
|
|
|
|
26 |
DO4.1 |
O |
DRIVE OUTPUT |
|
|
|
|
27 |
DO4.2 |
O |
DRIVE OUTPUT |
|
|
|
|
28 |
GND3 |
|
GROUND |
- 29 -
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