remains of Yamaha PSR 620 / 520

Bregg · 25th January 2011, 10:24 AM

Hi !

I have damaged Yamaha PSR 620 keyboard with damaged mainboard . A 5V low drop stabiliser shortcut sent about 14 V from an input , to all 5V powered mainboard section

I suppose many damaged parts , including processor etc. I was able to obtain another similar mainboard , but it is dead as first one . On the 5V stabiliser output is about 4 V and CPU is warming up quickly . I hope there is a dynamic
keyboard controller ( yamaha XJ450ao ) still intact . It has 6 pin connection with motherboard , two of them is power , of course . Is there a chance to use this controller to build up a midi keyboard ? Or maybe I should use another IC to control this dynamic keys for simple midi controller ?
Any help warmly welcome with these old mainboards , or in building a midi controller with use what's left from yamaha psr .
I'm looking for any schematics for this keyboard too .

Regards & thanx !

Maciej

DrSound · 30th January 2011, 11:56 AM

Quote:

Originally Posted by Bregg

Hi !

I have damaged Yamaha PSR 620 keyboard with damaged mainboard . A 5V low drop stabiliser shortcut sent about 14 V from an input , to all 5V powered mainboard section

I suppose many damaged parts , including processor etc. I was able to obtain another similar mainboard , but it is dead as first one . On the 5V stabiliser output is about 4 V and CPU is warming up quickly . I hope there is a dynamic
keyboard controller ( yamaha XJ450ao ) still intact . It has 6 pin connection with motherboard , two of them is power , of course . Is there a chance to use this controller to build up a midi keyboard ? Or maybe I should use another IC to control this dynamic keys for simple midi controller ?
Any help warmly welcome with these old mainboards , or in building a midi controller with use what's left from yamaha psr .
I'm looking for any schematics for this keyboard too .

Regards & thanx !

Maciej

I have these shematics and service manual, but files are too large.
Unfortunately only small files can be uploaded at this forum.

Send me your e-mail.

YuriW · 14th December 2011, 07:46 PM

Hi,

I know the thread is pretty old, but...

The very same situation here, with an old PSR-520. How did your story end, Bregg? Anyone else was able to turn that into a working midi controller? Is it even worth doing?

Thanks!

25th January 2011, 10:24 AM	#1
Bregg diyAudio Member Join Date: May 2009	remains of Yamaha PSR 620 / 520 Hi ! I have damaged Yamaha PSR 620 keyboard with damaged mainboard . A 5V low drop stabiliser shortcut sent about 14 V from an input , to all 5V powered mainboard section I suppose many damaged parts , including processor etc. I was able to obtain another similar mainboard , but it is dead as first one . On the 5V stabiliser output is about 4 V and CPU is warming up quickly . I hope there is a dynamic keyboard controller ( yamaha XJ450ao ) still intact . It has 6 pin connection with motherboard , two of them is power , of course . Is there a chance to use this controller to build up a midi keyboard ? Or maybe I should use another IC to control this dynamic keys for simple midi controller ? Any help warmly welcome with these old mainboards , or in building a midi controller with use what's left from yamaha psr . I'm looking for any schematics for this keyboard too . Regards & thanx ! Maciej

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14th December 2011, 07:46 PM	#3
YuriW diyAudio Member Join Date: Dec 2011	Hi, I know the thread is pretty old, but... The very same situation here, with an old PSR-520. How did your story end, Bregg? Anyone else was able to turn that into a working midi controller? Is it even worth doing? Thanks!

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