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Gear / Technical Help => Playback Forum => Topic started by: Mojowill on August 05, 2013, 06:42:44 PM
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So my old Sony receiver blew up a little while ago. I replaced it and thought I'd tear into it and fix it for another room. I took the cover off and saw the blown fuse. Removed it bought one that is identical in size amps and current and replaced it. Powered it up and instantly pop. Fuse nuked. Since it was a two pack I tried again. Poof. Soooo what's the short answer? Is amp shot? Should I bother digging deeper?? Should I just ventilate it with the assault rifle???
TIA
:)
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I thought you just blew amish?
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I just blew an amish!
Good for you Jimna. Go back to your bong you filthy hippy.
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Miss you too, man!
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I thought you just blew amish?
Now that was funny..... I needed that one....
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Glad to see this place hasn't grown up :)
Now someone help me out or I'll fly out to colobrahdo and shit all over Jimnas dreadlocks.
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Short answer, there's a short someplace downstream of that fuse.
Long answer... how good are you with electronics?
Could be a transistor blown, cap, resistor... everything down to a transformer. Take a look at all the boards and see if you see signs of obvious distress (or to word it in a way that may be more familiar to you, destruction) to any of the discreet components.
For instance, you may be able to see a blown up transistor, although it's more likely to be that several components went at the same time. If you can determine the part number (in the case of a transistor) or the rating (in the case of a resistor or cap) of the defective component, and you may likely have to scour for a schematic, you really don't have much to lose if you feel like firing up the iron and trying to replace whatever looks burned up.
Again, even if you replace what seems to be an obvious problem component there may be something else going on down the like that caused to to go, but what the hell, right?
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One other thought, fuses come in both fast blow and slow blow. It's possible you replaced a slow blow with a fast blow and the replacement couldn't take the initial load. Perhaps a slow blow won't blow immediately but I wouldn't put money on it from your description and I think anodyne nailed it that there is a short somewhere down current of that fuse. Check for bulging capacitors, obvious black/brown spots where leads attach or pass-thru the circuit board, open solder joints, etc and be sure to check both sides of the board for noticeable damage.