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Amp hummed when turned on then operated fine after 1-2 minutes, now just blows fuses model SU-8055

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6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

Thumbsmagee
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SOURCE: peavey classic 50/50 keeps blowing fuses.

Rob,

I have a classic 50/50 as well and re-tubed it with JJ el84s, vintage teslas and mullard 12at7s. As long as you replaced it with EL84s, I can't imagine that the output would be increased enough to damage the OT. When I got my 6505 Combo, one of the 6L6s was bad, and it kept blowing fuses and howling like a banshee. I would think that an OT problem would result in a significant loss of output...or none at all. I've gotten DOA tubes from a few places. I would suggest swapping each tube out 1 by 1, until you find it...if that is indeed the problem...before you pay the cash to have it worked on.

Posted on Oct 29, 2007

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Honda metropolitan 05 Met II blowing 15 amp fuse


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Technics su v2 amp will not turn on, other components work fine (turntable, radio, cassette player, speakers). I think it maybe the power supply. Tip? Opinions?


Check inside power supply fuse, it may be just that but if you put a new fuse and blows you may have a power output devices failure, let me know your results.

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My technics integrated amplifier su-v85a blows the fuse everytime i turn it on.what can be the problem?


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I purchased a pair of Hs80m. I am having a problem with one of them. The monitor works fine for about 10 mins. After about 10-15 minutes the monitor will make a humming sound then eventually blow out. The...


The powere amp portion is LIKELY going into thermal runaway where one side of the pushpull driver shorts out drawing heavy current to the point you can hear the ripple (hum) probably followed by fuse blowing. You need to have that unit repaired. Replacing fuses MAY be causing further damage.

Chances are IC601 or IC602 (LM3886TF-2) are defective or something in the DC feedback circuit.

Here is the service manual: http://elektrotanya.com/yamaha_hs80m_hs50m.pdf/download.html

Of the two, IC601 is the most probable as it drives the woofer. Available...$7.30 from

http://search.digikey.com/scripts/DkSearch/dksus.dll?lang=en&site=US&WT.z_homepage_link=hp_go_button&KeyWords=lm3886

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Power washer works perfect for 10- 15 minutes then blows fuse. Put in new fuse straight away and works fine again for another 10-15 minutes.


These machines can have issues such as you have explained if they are run off from an extension cord or if they are really far from the breaker box. They have this issue because the amount of amps that are going to the machine aren't enough for the motor to operate efficentially so the motor in turn gets hot and blows the fuse or the breaker.

Another issue could be is that the nozzle is being restricted to much and is causing the motor to work harder than what it should and is causing the machine to over heat. This in turn would cause the motor to blow a fuse or a breaker.

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