Question about Marshall MG100HDFX 100-Watt Amplifier Head

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Hi I have a JCM100 the fuses are blown can you tell me what the problem could be thank you

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  • Marshall Master
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It probably is shorted filter capacitor(s) or shorted rectifier(s).

A shorted output tube could do this, but those are unlikely unless unit has been dropped.

Worst case is shorted power transformer.

In any case do NOT replace the fuses and keep trying as further damage could result. Take unit in for repair if you are not skilled in electronics... there are high voltages in this unit that are lethal.

Posted on Aug 07, 2010

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Hi,it is hard to tell which one is correct without examining the blown fuse..
May I recommend to you to contact official YAMAHA support site as seen on the link below..
please fill all the blank info ont form and they will return to you in 24 hours..
Additionally I included another link for the user manual just in case..
Take care and if it succeeds please Remember to rate/vote and give me 4 Thumbs Up
for Helping out the Community :)

Hope this helps!

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https://inquiry.yamaha.com/global/?act=1&lcl=en_WW&auth=none

About YAMAHA ProductsFor product support:
Please enter product category / model.Send your inquiry to us via the form provided.
Please fill out the following information. Entry fields marked with * are mandatory.

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http://www.helpowl.com/p/Yamaha/HS80M-hs-80m-speaker/19026
Yamaha HS80M Manual Pages

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