Looking for technical help on roland hp-103 and kr-105

[nosaj]

I'm Looking for technical help on roland hp-103 in piano mode keys make a distorted sound in other modes it sounds clear.
Kr-105 when you hit the keyboard it makes some electrical racket.

Any ideas on a good repair forum to checkout?

Thanks,
Jason

 

[happyrat1]

You might want to ask over at http://eevblog.com

At any rate, I'd try reinstalling the firmware before I took a screwdriver to them.

Gary

 

[nosaj]

You might want to ask over at eevblog

At any rate, I'd try reinstalling the firmware before I took a screwdriver to them.

Gary

Where might one find the firmware to reflash with?

Thanks,
Jason

 

[happyrat1]

http://www.rolandus.com/

 

[nosaj]

i see no firmware in the support section for either hp-103 or KR-105. Am I blind or have you actually seen it there? For the KR-105 I see the windows driver but nothing in the readme relevant to firmware.
Thanks,
Jason

 

[happyrat1]

http://www.rolandus.com/support/support_faq/

Looks like Roland doesn't offer any firmwares for those boards.

They also don't provide any support or assistance for self repairs.

You might find some assistance over at http://forums.rolandclan.com/

Otherwise you may be SOL and have to take it to authorized tech for service.

Gary

 

[nosaj]

Thanks for your help.

jason

 

[happyrat1]

Sorry I couldn't do more.

Rolandclan may be your last hope else you'll have to shell out for service.

Gary

 

[nosaj]

For the KR-105 replacing the output Power IC fixed the noise which was actually DC on the right Channel. Works great now. The other Roland nothing worked All Transistors were ok.

Thanks,
Jason