hi Ted
so i took your advice and went over the sockets and IC legs on the output board with de-oxit and re-seated them
I'm still getting distortion. its affecting all the outputs and all samples/voices so the problem must be the IC where they are summed
do you know which suspect ICs I should be focusing on in the output board?
I'm still trying to rule out corrupt sample data, but the problem is intermittent and there is no bad data messages on any of the banks i load
I've noticed that sometimes i can load the samples with no distortion then after a while it kicks in
> To: emax@yahoogroups.com
> From: emax@yahoogroups.com
> Date: Thu, 3 Dec 2015 16:43:49 -0800
> Subject: Re: [emax] Emax distortion
>
> When you reseated the IC\u2019s did you use DeOxit on the chips and the sockets?
>
> You can\u2019t get the connector on the ribbon that\u2019s soldered to the board on the one end, just so you know (I went looking for these just recently and can\u2019t find them1;\u2026.
> You could try and DeOxit on the male side of the connector, also- although I haven\u2019t heard of the ribbon being a common cause of noise.
> Usually it\u2019s the ICs (they can go bad), the sockets, or the reference voltage being supplied for the signal being the problem.
>
>
> -T
>
>
>
> On Dec 3, 2015, at 2:08 PM, Shawn Ward shawnjward@hotmail.com [emax] wrote:
>
>
> I'm still having problems with distortion coming through all outputs on my Emax 1000 Keyboard
>
>
> I have an HxC drive installed and I've confirmed the samples are loading properly and not corrupt
>
> I've also re-seated all the ICs on the output board.
>
>
> my PSU rails are also showing stable -12.6v +12.6v 5.2v
>
> I'm thinking it might be a bad ribbon cable that connects the CPU board to the Output Board
>
>
> any tips to troubleshoot would be great!
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
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> From: emax@yahoogroups.com
> Date: Thu, 3 Dec 2015 16:43:49 -0800
> Subject: Re: [emax] Emax distortion
>
> When you reseated the IC\u2019s did you use DeOxit on the chips and the sockets?
>
> You can\u2019t get the connector on the ribbon that\u2019s soldered to the board on the one end, just so you know (I went looking for these just recently and can\u2019t find them1;\u2026.
> You could try and DeOxit on the male side of the connector, also- although I haven\u2019t heard of the ribbon being a common cause of noise.
> Usually it\u2019s the ICs (they can go bad), the sockets, or the reference voltage being supplied for the signal being the problem.
>
>
> -T
>
>
>
> On Dec 3, 2015, at 2:08 PM, Shawn Ward shawnjward@hotmail.com [emax] wrote:
>
>
> I'm still having problems with distortion coming through all outputs on my Emax 1000 Keyboard
>
>
> I have an HxC drive installed and I've confirmed the samples are loading properly and not corrupt
>
> I've also re-seated all the ICs on the output board.
>
>
> my PSU rails are also showing stable -12.6v +12.6v 5.2v
>
> I'm thinking it might be a bad ribbon cable that connects the CPU board to the Output Board
>
>
> any tips to troubleshoot would be great!
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
> ------------------------------------
>
> ------------------------------------
>
> Emax and Emax II User8;#39;s Group
> ------------------------------------
>
> Yahoo Groups Links
>
> <*> To visit your group on the web, go to:
> http://groups.yahoo.com/group/emax/
>
> <*> Your email settings:
> Individual Email | Traditional
>
> <*> To change settings online go to:
> http://groups.yahoo.com/group/emax/join
> (Yahoo!; ID required)
>
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