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Marshall JCM2000 TSL601 Powers on but no sound

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  • thom3331 Mar 24, 2009

    Same problem, took it to my tech. He said the JCM2000 series all have this problem, he said he fixes them all the time. It's something with the heater filiments or grid resistor or something. He said he doesn't understand why marshall didn't fix this problem a long time ago! Easy fix,... take it to your tech!! ;)

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Hi scot4321

Most common cause of no sound is a blown fuse. Check both the fuses with a resistance checker if you have one, sometimes they may look good, but be faulty. If this is the case, you probably need to look for a reason why the fuse blew in the first place. Running a tube rig without a speaker connected is often the problem. the HT fuse will pop almost straight away. Another is using a signal lead instead of a speaker lead to connect your Speaker cab. Always use at least an 18 gauge speaker lead with decent connectors like Switchcraft or Neutrix. NOT a cheapo patch lead. A Failing tube will also commonly cause it to blow. If it happens again, then change the output tubes. If it is not the fuses, and you have experience with repairing valve amps, I suggest you take the head into a repair guy for a look.

I am more than happy to answer any other questions you may have about it, just give me a hoy :) If you still have problems, then before you give a rating for this advice, please get back to me and we can try some more things.
Thanks for using FixYa, If you consider the advice I have given you as sound, a FixYa rating is a great reward for my efforts to help you. Cheers.

regards
robotek




Posted on May 31, 2008

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