parts

Hi there! Can anyone point me to a replacement pot for VR1? I've seen some posts saying that it shouldn't be messed with. Sadly my board came with a busted pot. The game works, but I don't know if it will cause damage in the long term.

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I have 2 x NEC D42832C-15L adjacent to some main CPU eproms. Are these RAM IC's or a programable ROM? Thanks...