LM2904

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