Yamaha Electric Piano CLP550 ROM Codes

[dkneyle]

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.

[aotearoa]

Re: Yamaha Electric Piano CLP550 ROM Codes

HI,
yep have one here with that fault. Would anybody acroos the ditch in fair Australia have a set of ROMs programmed ready to sell and ship to New Zealand please?

all the best

[stj]

Re: Yamaha Electric Piano CLP550 ROM Codes

if the CLP's are like the PSR's then you can probably put them in testmode and they will check the roms and give you the version numbers!
hold C2#, F2 and G2# while you turn the power on.
if it says "test" you can step the test with +/- and run it with star/stop