Falcon sound problems (DSP)

Problems with your machine in general.
User avatar
derkom
Moderator
Moderator
Posts: 1208
Joined: Sun Jul 29, 2018 6:45 pm

Re: Falcon sound problems (DSP)

Post by derkom »

The Faclon DAC does get quite warm under normal operation.
User avatar
kohli79
Posts: 63
Joined: Fri Feb 05, 2021 8:23 pm
Location: Saxony Anhalt, Germany

Re: Falcon sound problems (DSP)

Post by kohli79 »

derkom wrote: Fri Apr 02, 2021 3:23 pm The Faclon DAC does get quite warm under normal operation.
OK thanks! 👍
Life is too short not to have an Amiga/Atari. 8-)
Steve
Posts: 2570
Joined: Fri Sep 15, 2017 11:49 am

Re: Falcon sound problems (DSP)

Post by Steve »

Yes and that is just for video, the DAC you'd be concerned with would be the Crystal DAC in the top right corner above the SDMA.
User avatar
kohli79
Posts: 63
Joined: Fri Feb 05, 2021 8:23 pm
Location: Saxony Anhalt, Germany

Re: Falcon sound problems (DSP)

Post by kohli79 »

I played again with the SDMATest program. The sound interference / crackling are always at 33Hz, 25Hz, 20Hz. Mostly at 33Hz. When I switch from 25Mhz to 32Mhz (master clock) everything is ok and no problems.
Life is too short not to have an Amiga/Atari. 8-)
Steve
Posts: 2570
Joined: Fri Sep 15, 2017 11:49 am

Re: Falcon sound problems (DSP)

Post by Steve »

Since you are in Germany I think you may have a great choice of Falcon experts who may be able to look at it for you. Have you been speaking on atari-home.de? Perhaps @tuxie might know somebody
User avatar
kohli79
Posts: 63
Joined: Fri Feb 05, 2021 8:23 pm
Location: Saxony Anhalt, Germany

Re: Falcon sound problems (DSP)

Post by kohli79 »

Steve wrote: Sat Apr 03, 2021 7:51 pm Since you are in Germany I think you may have a great choice of Falcon experts who may be able to look at it for you. Have you been speaking on atari-home.de? Perhaps @tuxie might know somebody
No not yet, wanted to ask there again ... Thanks anyway.
Life is too short not to have an Amiga/Atari. 8-)
User avatar
kohli79
Posts: 63
Joined: Fri Feb 05, 2021 8:23 pm
Location: Saxony Anhalt, Germany

Re: Falcon sound problems (DSP)

Post by kohli79 »

I tested the cold spray on the Falcon today.
I couldn't find anything on any IC, except on the SDMA.
As soon as I'm on with the spray, the crackling in the ACE Tracker is gone. In the DMA-DSP test, these spikes also disappeared for a short time, until it warmed up again.
So the SDMA chip seems to have a problem !?

Video link attached.

https://youtu.be/6Mr0kqsFWJE
Life is too short not to have an Amiga/Atari. 8-)
Steve
Posts: 2570
Joined: Fri Sep 15, 2017 11:49 am

Re: Falcon sound problems (DSP)

Post by Steve »

Perhaps the chip needs resoldering, I doubt the chip itself would be faulty.
User avatar
kohli79
Posts: 63
Joined: Fri Feb 05, 2021 8:23 pm
Location: Saxony Anhalt, Germany

Re: Falcon sound problems (DSP)

Post by kohli79 »

Steve wrote: Fri Apr 09, 2021 2:22 pm Perhaps the chip needs resoldering, I doubt the chip itself would be faulty.
Yes, I will try again with re-soldering.
So not me but my specialist ... ;)
Life is too short not to have an Amiga/Atari. 8-)
User avatar
kohli79
Posts: 63
Joined: Fri Feb 05, 2021 8:23 pm
Location: Saxony Anhalt, Germany

Re: Falcon sound problems (DSP)

Post by kohli79 »

My specialist looked at the Falcon yesterday and re-soldered the SDMA. Without success! :(
Still the same problems.
Unfortunately it doesn't have a reflow station to change it. I will ask in the German Atari forum.
I could get a replacement from best-electronics in the USA. According to their catalog, they have some in stock.
Life is too short not to have an Amiga/Atari. 8-)
Post Reply

Return to “HARDWARE ISSUES”