Re: Yamaha Electric Piano CLP550 no keyboard output

Hi PMD

Thank you for your suggestion I unchecked the Pin check and Verifiy ID and it worked.

Regarding the your question my CLP resurrected from the very dead :-) it is working now without distortion as a brand new.

I compared the Roms.

The Rom A you provided start with several line of FFFF. I was suspicious of it taking in consideration that when I used it, my CLP behaved like when you have no chip A

Comparing the Rom A with the one dumped showed significant...

Re: Yamaha Electric Piano CLP550 no keyboard output

Hi Everyone

Thank you for the forum, I was able to resuscitate my CLP550. It is working without a glitch.

I used the the ROM from Band C with my original A chip. I believe the ROM from the A chip provided is incomplete or corrupt. I initially used it on a 27C040 however the function Piano 1 worked partially with similar symptom as without A chip.

When I used the original Yamaha chip A - everything worked without sound distortion

So far I have been unable to dump the Rom...

Re: Yamaha Electric Piano CLP550 no keyboard output



Dear PMP

Could you please describe in detail how you read the chip. How did you manage to unsolder them or somehow did you connect to them on the board? what application did you use. In short the whole setting.

I am not bad a diy and electronics but reading damage chip on a board would be a first for me.

I have a "dead" clp 550. I would like to extract whatever rom possible so we could compare them and make an educated choice for flashing them onto the 27040...

Re: Yamaha Electric Piano CLP550 no keyboard output

Hi everyone

I though I was the cleverest among the clever and purchase a defective clp 550 that should be so easy to repair ... yo know the rest

The piano is visually in wonderful condition the previous owner used it for about 3 years and stored it for about 20 years. Then it never worked since.

Reading this thread stopped my madness in looking after every single capacitor with the hope that just needing reforming.

At present if I press enough times a key I seldom get...