Help: No Sound Out Of Marshall JCM2000 DSL100 Head

  • Thread starter Thread starter Charvel1975
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Charvel1975

Charvel1975

Active member
Hey guys we had practice tonight and my other guitar player his Marshall JCM2000 DSL100 head stopped working about 20 minutes into practice. He let it warm up enough before we started playing, and like I said, it stopped putting out any sound?

We checked all the tubes and all of them were glowing fine but one of the Marshall labeled preamp tubes wasn't glowing as bright so we swapped that one out and still no sound. So he told me that the tubes have been in there for about 8 years, in the power section he's got the winged c el34's and in the preamp it looks like he's got a combination of mesa and the factory preamp tubes. Now all the lights are lighting up fine, fuses are fine, just no sound? Any JCM2000 DSL100 owners here know what tubes he should re-tube it with, we play modern metal. Also it's obviously gonna probably need to be re-tubed and biased and he doesn't know how to do that so what amp tech close to the akron/canton ohio area and what the problem might be? Thank you!
 
EL34 Rubys sound great in mine. I have no idea about the problem tho.
 
Maybe check some of the obvious things. Did his guitar cable go bad? Is everything plugged in ALL the way?

In situations like this, sometimes it is an easy solution that is being passed over for larger potential problems.
 
Are you positive the HT fuse didn't blow? Re-check and look closely at that for sure. If it did, replace it and the power tubes, properly biased of course.
 
Everything was plugged in right now bad cables and the fuses were fine
 
Sounds like Sunday was a bad day to own a Marshall.
My SL-X fired up, jammed on it for about 5 minutes, pulled the cable to switch guitars, plugged back in.... no sound.

Preamp tubes are cold but work fine in other amps. Fuses are all good.
Power section is still good because plugging in to the return loop makes noise.

I did some research and it looks like our amps (DSL's in particular) suffer from solder joint failure in the pre-amp section.
I'm going to open mine up this weekend and freshen up all the solder joints.
Perhaps yours failed that way too?

Russ
 
What output were you plugged into, 8ohm? If so try plugging into the 16ohm output and see if you get a signal. If it works you may need to hardwire a connection between the 4,8, and 16 ohm jacks. My DSL50 did the exact same thing as your 100 and turns out the 16ohm jack went haywire and cut off the other two outputs.

The following thread over at the marshall forum will explain it better than I can at 5am in the morning ;)

http://www.marshallforum.com/workbench/ ... oblem.html
 
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