[sdiy] Yamaha datasheets

[Scott Nordlund]

> Hey all,
>
> A quick question. I know, they're never quick... Anywho, my RX21 has bit it. Doesn't power on anymore. The drum sounds weren't exactly the best in the world, It's certainly not a x0x. So I was wondering if anyone had a datasheet for the chip inside.. YM2154. Also there's a YM2211-22725 that I can't identify at all...

You should probably forget about it.  If you want info, the service manual will have pinouts but beyond that no real information.  They're not usually online but you can try ebay or whatever.  If the ASICs are bad (aside from maybe a DAC, the YM3012 and YM3014B aren't too uncommon), you'll never be able to find a replacement since they were probably only ever used in the RXwhatever and maybe some obscure PSR-something or Electone model that you wouldn't be able to find even if you'd heard of it.
 		 	   		  
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