Yamaha Receiver Smoking After Replacing Fuse (1 Viewer)

I have electrical experience with guitars and car stereos, but am new to home stereo repair. Last night I was listening to some music over my Yamaha RX-700U, when it suddenly stopped. After unplugging and plugging in the power cable I attempted to turn it on with only a *click* sound being made, nothing else.

This morning I open it up and find the f101 fuse exploded (no surprise considering the stereo hadn't been used in a couple years when I received it). I go to Radioshack, pick up the EXACT same fuse, replace it, dust off some of the internals and attempt to turn it on. However this is where the real problems started.

When I plugged it in and hit the power button, there was a small hum and a small amount of grey smoke rising from the vent on the top.. I quickly turned the power strip off, unplug it and open it up. No burn marks anywhere, and the new fuse appears to be fine.

I now realize this won't be a quick fix, and I should probably scrap the old thing. But before I do I thought I'd check and see if someone could at least help me pinpoint the problem so I can get back to the music.

Welcome to the forum. Not sure what the problem is but the unit is old and not worth tons - http://www.shopgoodwill.com/auctions/Yamaha-Natural-Sound-Stereo-Receiver---RX-700U-16090765.html

So unless there is an easy fix, that someone comes up with which does not cost much, you can get an Onkyo or a couple Denon factory refurbs at accessories4less.com for $129.99 such as http://www.accessories4less.com/make-a-store/item/denavre200/denon-avr-e200-5.1-channel-3d-home-theater-receiver/1.htmlor used things on Craigslist or other places for probably less than the cost of a technician to look at it.

There are sites like this which may help - http://www.repairfaq.org/REPAIR/F_audiofaqa.html

Here's a couple of more sites:

http://www.fixya.com/tags/yamaha_fuse/receivers
http://www.eserviceinfo.com/forum_search_wrap.php?searchtext=yamaha%20rx-700u

Also hifiengine.com may have the service manual for your model or something similar. It is free.

Fuse is indicative of another problem. Could be lots of things, even a collapsed (shorted) relay.

^^^^ Exactly what Sam said. Fuses are there to protect the whole system when something else goes wrong - they are an easy (and cheap) point of failure. Replacing the fuse doesn't solve the real problem - it only allows it to happen again.