If you have a Yamaha CLP550 which has seemingly stopped working for no reason, we have the solution for you after many good people worked together to recover the ROM code that becomes corrupted or lost after many years of service.
This thread tells the story of the journey: https://www.badcaps.net/forum/showthread.php?t=36535
If you want the good ROM code for the three memory ROMs that generate the piano tones, then go to Post #114. Tested and good ROM code.
The technology of the original ROM chips was at the very edge of the silicon density for the time. After many years the internals of the ROMs fail. Replacing with reprogrammed (cheap) FLASH ROM gets the piano back in business.
Congratulations to all the people who worked on this project.
This thread tells the story of the journey: https://www.badcaps.net/forum/showthread.php?t=36535
If you want the good ROM code for the three memory ROMs that generate the piano tones, then go to Post #114. Tested and good ROM code.
The technology of the original ROM chips was at the very edge of the silicon density for the time. After many years the internals of the ROMs fail. Replacing with reprogrammed (cheap) FLASH ROM gets the piano back in business.
Congratulations to all the people who worked on this project.
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