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Post subject: DSP chip fail on Champion 30 DSP - possible to bypass?
Posted: Mon Nov 03, 2014 7:35 am
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hey all,
i have a 2002 Champion 30 DSP (solid state) - and the DSP chip is kaput, according to the amp repair guy. It works until the amp gets warm, then glitches and dies. I would like to know if it would be possible to short circuit or bypass the Effects part of the amp - i don't need the effects anyway and i really like the sound of this amp. Anybody know anything about this? Is it even possible?
any suggestions would be greatly apreciated :)
thanks a lot!!!


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Post subject: Re: DSP chip fail on Champion 30 DSP - possible to bypass?
Posted: Mon Nov 03, 2014 2:16 pm
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If your amp just shuts off it sounds like a heat sensor. Check to see if you have a fan, if it does not have a fan, it senses its over heating on the chip and it will turn off. that is my experiences.

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Post subject: Re: DSP chip fail on Champion 30 DSP - possible to bypass?
Posted: Mon Nov 03, 2014 2:26 pm
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What did the repair guy say ?

Tell me what is the DSP chip ? There are many chips on this amp


Schematic ;

http://support.fender.com/schematics/gu ... ematic.pdf


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Post subject: Re: DSP chip fail on Champion 30 DSP - possible to bypass?
Posted: Tue Nov 04, 2014 12:32 am
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Dxt931 wrote:
If your amp just shuts off it sounds like a heat sensor...


+1

If the chip was bad, it wouldn't work only when cool, it just wouldn't work at all.

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Post subject: Re: DSP chip fail on Champion 30 DSP - possible to bypass?
Posted: Tue Nov 04, 2014 2:47 am
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Dxt931 wrote:
If your amp just shuts off it sounds like a heat sensor. Check to see if you have a fan, if it does not have a fan, it senses its over heating on the chip and it will turn off. that is my experiences.



On schematic there is no fan or heat sensor


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Post subject: Re: DSP chip fail on Champion 30 DSP - possible to bypass?
Posted: Tue Nov 04, 2014 4:12 am
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No "Champion 30 DSP" schematic.

I will check to see if I have one. :?:

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Post subject: Re: DSP chip fail on Champion 30 DSP - possible to bypass?
Posted: Tue Nov 04, 2014 4:28 am
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shimmilou wrote:
No "Champion 30 DSP" schematic.

I will check to see if I have one. :?:



My schematic is not a DSP ! :oops:

Can't find DSP :(


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Post subject: Re: DSP chip fail on Champion 30 DSP - possible to bypass?
Posted: Tue Nov 04, 2014 5:56 am
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I can't find one either. I will contact Fender and ask for one.

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Por favor, disculpe mi español, no se llega a la práctica con mucha frecuencia.


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Post subject: Re: DSP chip fail on Champion 30 DSP - possible to bypass?
Posted: Tue Nov 04, 2014 7:33 am
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shimmilou wrote:
I can't find one either. I will contact Fender and ask for one.



+1000


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Post subject: Re: DSP chip fail on Champion 30 DSP - possible to bypass?
Posted: Thu Jun 07, 2018 7:30 am
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I have a similar issue. I can plug my amp in and everything is fine and as I play it is like the Vibrato effect is stuck on and it makes the amp volume go quiet. I know you shouldn't hit an amp but if you do smack the top of the Amp it goes away for awhile. I would love to bypass the effects all together. I thought I would try a foot switch but the Foot Switch does nothing. I have a fender on button on off foot switch but I am not sure if it is compatible or if the effects and switch area is just jacked up.


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Post subject: Re: DSP chip fail on Champion 30 DSP - possible to bypass?
Posted: Sun Jun 10, 2018 8:30 am
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The cpu talks to the other digital chips. If the dsp chip is not able to answer the cpu chip, the it will not continue and shut down.
You can troubleshoot this type of failure with a can of freeze spray and a heat gun. I use a small embossing tool. Its lower power and can cover a smaller area.
Keep the dsp chip cool after power up and see if it stays stable. Spray some on a qtip and press against components to isolate the cooling effect better than spraying the board. Use a just a little. It doesn't need to be real cold, just don't let it get warm. If it keeps running under these conditions, it is probably a bad dsp chip. Replacement components are not available. If it still acts up, it might be bad solder or an intermittent through hole connection.
Use the alternate heating and cooling to find sensitive areas on the board. Resolder as needed. Do not use paste flux. Its conductive and can't be cleaned under chips.
Most likely, you will be buying another amp.


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