diode array

The SNES has 4 diode arrays (in groups of 4 and 6) near the Front Panel Daughterboard in regions A1 and A2 of the jwdonald schematic. These may be to provide transient voltage suppression on the controller ports.

A diode array in region A1 of the jwdonal schematic

References

• TVS: https://hackaday.io/project/18301-nes-motherboard/log/49842-diode-arrays-da1-da2-added
• datasheet: https://fscdn.rohm.com/en/products/databook/datasheet/discrete/diode/switching/dan202kt146-e.pdf