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| IC401 TDA7419TR (MAIN Board (1/3)) |
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| MIX | MIX |
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| HPF |
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| HPF |
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ACOUTR | 1 | SOFTSEP MONO FADER | SOFTSEP MONO FADER | SOFTSEP MONO FADER | SOFTSEP MONO FADER | SOFTSEP MONO FADER | SOFTSEP MONO FADER |
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ACINR | 2 |
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ACINL | 3 |
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| SUBWOOFER |
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ACOUTL | 4 |
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| L.P.F |
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| BUSS |
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| 28 | OUTRR2 |
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| MIDDLE |
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| 27 | VREF |
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| SPECTRUM | 26 | SAOUT |
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| ANALYZER | 25 | SAIN |
AC2INL | 5 |
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AC2INR | 6 |
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| 24 | VDD |
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| TREBLE |
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| BUS | 23 | SDA |
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| SOFTSTEP |
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| I2C | 22 | SCL |
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| CONTROL |
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| VOLUME |
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| SOFT |
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| DIGITAL |
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| MUTE |
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| LOUDNESS |
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| 21 | MUTE |
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| 20 | OUTLF |
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| 19 | OUTLR1 |
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| 18 | OUTRR1 |
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| IN GAIN |
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| 17 | OUTRF |
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| 16 | OUTLR2 | |
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| AUTO ZERO |
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| 15 |
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| GND | |
SE2L | 7 |
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| SUPPLY |
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SE2R | 8 |
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SE1L | 9 | INPUT |
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SE1R | 10 |
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MULTIPLEXER |
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DIFFL | 11 |
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DIFFG | 12 |
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DIFFR | 13 |
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CREF | 14 |
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| 35 |
