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View Full Version : Poping, cracking, power loss did my 5.1 blow up?

PCGUY112887
08-06-05, 08:33 PM
A bit of an odd story here. Last night I noticed that when I turned on my reciever hooked up to my computer (NF7-S) via Optical (KLH R5100) it never picked up any imput (kept flashing left and right speakers, never displaying all speakers). So I checked all of the connections, tried turning it off and on a few times and it just started working.

A bit later i'm rockin out and notice that the display went back to showing no imput, just the left and right channels flashing. I still hear 5.1 audio so I was thinking "wtf..." and tried turning it off and on again. When it came back on, no sound. I kept turning it off/on/off/on, edventually it all came back and I was rockin out again, and the same thing happened. I went ahead and checked all of the cables 2 more times, everything is fine.

So I leave it off and a bit later I come by to dust things. I go to lift the reciever and I hear an electrical crackel and pop, and my rig turns off, monitors go off, everything. I about **** myself and drop down and pull all of the power. I go looking for any kind of lose wires or something that I could have pulled, and there is NOTHING! The only thing connecting the PC and my computer is the optical cable, and it coulden't carry any power if it wanted.

So I get back down and have to reset the breaker on my UPS and turn everything back on. Audio is still doing the same thing, nothing appears fried or broken. I go and check my UPS status and it's down to 61% and charging. Apparentelly something got shorted or SOMETHING and it powered off everything and sucked 39% of the battery in a second.

I go checking all of my drivers/connections over and over, nothing. I got it to come on a few more times by turning it on/off/on/off but that isn't any way to use a device. I hop on Google and can't find much aside from someone saying a blown fuse inside. Since this is way out of warrenty I pop it open and find the fuse. I haven't pulled it yet but it doesn't appear to be blown.

I figured that before I do anymore I better test this thing with something else. I haul the reciever over to my DVD player and hook it all up via Optical, and it does the same thing that the computer did, it would turn on, play some, then show no imput, then woulden't come back on, etc etc.

I thought if the fuse would have blown for whatever reason, the reciever would do nothing insted of just sorta working?

HELP I need my tunes back!
schismspeak
08-07-05, 12:56 AM
I'd make sure nothing is shorting out inside, open it up and look for burnt wires and/or traces. Sounds like it might be shot, unless you are really good with electronics.

Replacement... (http://www.target.com/gp/detail.html/601-8222640-6610511?_encoding=UTF8&frombrowse=1&asin=B0009A0XW6) lol, i'd honestly go with a different brand if you don't figure out wth the problem is. Amps should last 10-20+ years, vintage ones do, the new ones should.
zabomb4163
08-08-05, 06:14 PM
schismspeak, i wouldnt count on the particular receiver you linked lasting 20 years....or even 5 years for that matter. KLH can not be compared to the quality of most receivers on this forum.
PCGUY112887
08-09-05, 03:06 AM
I don't think he meant THAT one should last that long, but a good one should.

I did find a *fix* for this. If I unplug it/plug it back in it works fine for either around 10min or hours on end untill it goes out or I turn it off, then just unplug/replug and it's fine again. Seems like it would almost have to be something to do with power then?
Dell_Axim
08-10-05, 08:27 PM
Could it be a bad PSU board? While it works, try to measure the voltages from the PSU board so you can find a replacement. (It will be the board that connects directly to the AC input. Then find the wires connected to the other boards and carefully probe there. If you give me a picture, I can tell you where to probe.)
If you want to troubleshoot/repair it, try http://repairfaq.ece.drexel.edu/sam/smpsfaq.htm .
schismspeak
08-13-05, 03:09 AM
schismspeak, i wouldnt count on the particular receiver you linked lasting 20 years....or even 5 years for that matter. KLH can not be compared to the quality of most receivers on this forum.I linked an exact replacement for PCGUY112887. I wasn't serious about him replacing it with the same one if he doesn't figure out the problem, which is why I said go with a different brand, and went on to say how long an amp should last, a good one that is.


PCGUY112887, that sounds interesting, i'd check it out, you might be able to have that fixed at some electronic place for cheap if you can't figure out and fix the problem, but it sounds like you might be onto something.
Cyrix_2k
08-13-05, 04:30 PM
Just buy one of these... http://shoponkyo.com/detail.cfm?productid=TX-SR502&modelid=34&group_id=1&detail=1&ext_war=1

I have that exact reciever and it's great. It will support 5.1 too (you don't need the sixth speaker). It has 3 optical ins and 1 coax in, so you should have no connectivity problems.
Vulcan
08-16-05, 05:31 PM
Just buy one of these... http://shoponkyo.com/detail.cfm?productid=TX-SR502&modelid=34&group_id=1&detail=1&ext_war=1

I have that exact reciever and it's great. It will support 5.1 too (you don't need the sixth speaker). It has 3 optical ins and 1 coax in, so you should have no connectivity problems.
Might want to check ebay for a refurb AVR from harman kardon as well.