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LM2904

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The LM2904 is a dual op-amp chip, which the 1st revision SNES has two of. These are the circuits they serve and their locations:

the Pre-Amplifier, on the SHVC-SOUND Daughterboard
the Post-Amplifier, on the SNES motherboard

References

See note straddling regions D5 and D6 of the jwdonal schematic

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