Emax

i have exactly the same problem, replace the scan chip with a new one with no success, you finally fixed?.

--- In emax@yahoogroups.com, "jammie" <jammie.emma@...> wrote:
>
> actually i can be the scanner chip iv had it when you can play notes on kewyboard but when pressing buttons its arratic and jumps allover the place
>   ----- Original Message ----- 
>   From: emax_dx5 
>   To: emax@yahoogroups.com 
>   Sent: Monday, July 09, 2012 2:59 PM
>   Subject: [emax] Re: Five top keys fault
> 
> 
>     
>   I won't go for the MPU Scanner (IM386). When it fails, no button or key usually work.
> 
>   You said you sent midi to the Emax and it made sound. Did you check the MIDI OUT commands the emax is sending? you can do it both with a Midi analyzer on your computer or using the function MIDI Scope. Check if it sends Key ON and OFF commands or not. If any of those cases:
> 
>   Go to the keyboard Printed Circuit Board. ONce you already checked diodes, Check continuity on the traces involved with those keys (a multimeter will do the job). If a common ground trace is open, this fault uses to happen.
> 
>   hope it helps.
> 
>   Best.
>   Jose
> 
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>   
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