Jadis JA200 - Main 8amp slow blow fuse blowing.

jeilers

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Feb 21, 2019
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I have a JA200 - (4 pieces, 2 for each channel) and one side is blowing the Main 8amp slow blow fuse. Is anybody aware as to how to even begin to trace/diagnose this back to find the potential culprit or suggest as to what might be the component creating this to occur? I can post pictures if necessary.. These are Huge Very Heavy units so a major issue to send somewhere..
 

bazelio

Well-Known Member
Sep 26, 2016
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Best to have a qualified tech look at it. If you don't know what you're doing, poking around inside a tube amp is very dangerous.

When does the fuse blow - shortly after power up, later after power up, while playing music, etc ?

When was the last time you changed tubes? (I don't know this amp, but rectifer tubes in particular assuming it has them, but I'd check all tubes.). Can anyone locally test your tubes for you?
 
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microstrip

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May 30, 2010
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I have a JA200 - (4 pieces, 2 for each channel) and one side is blowing the Main 8amp slow blow fuse. Is anybody aware as to how to even begin to trace/diagnose this back to find the potential culprit or suggest as to what might be the component creating this to occur? I can post pictures if necessary.. These are Huge Very Heavy units so a major issue to send somewhere..

I would try swapping all tubes from one channel to the other. If the side blowing tubes changes it is surely a bad tube.
 
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