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I have recently purchased a Harmon Kardon AVR 125 used. It cost me a 139.00 through a wholesale outfit. Anyway, after setting it up, it worked for the first evening and I was very happy with the results. The next day, it began to shut down in the middle of use (CD and DVD). It appeared to be doing so for some sort of short circuit/power regulation purpose. During the course a DVD it shut down 4 times (about every ten minutes). When this happened, the light around the power on button would flicker in red. To work again, it required I shut it down using the main power button, wait a few seconds, and then start it up again.What is going on? I have a 10 day warrenty, but would rather not return it based on the price if I can avoid it.
My questions are:
1) Is this regulated to inconsistant power in my house (too many inputs into a power strip (TV, DVD, CD, Tuner), and would an alternate outlet provide a solution?
2) Could a wiring error do this (would mixing up speakers +, - do this (i'm sure i didn't but there is always a chance)
3) Could this be coming from an incompatability between the unit itself and the surround/house speakers?Thanks!
Follow Ups:
Sounds like you have maybe 4 or 6 ohm speakers and the receiver may only be good for 8. It's going into thermal protection mode is my guess.
Otherwise the HK should be able to handle 4 ohm speakers.I'd check out the speaker specs and double check my speaker wire.
They are HORSE-SHIT !!! Some receivers produce LESS power at 6 ohms than they do at 8 ohms!!! What do you think they are doing with a speaker that dips to 4 ohms or below??? From what i've seen, they shit their pants and shut down, especially if you have ANY type of volume on them. Compared to yester-year, old "vintage" receivers are built like tanks compared to what they are producing today. Now more than ever the saying about "going the route of separates for best performance" is oh-so true.Below are actual test results of various receivers. HT industry standard is now 6 ohms, so they test the output at 8 ohms to satisfy the old 2 channel crowd and then again at 6 ohms. Used to be a few years ago, all the receivers would increase output at 6 ohms but start to nosedive sharply with a 4 ohm load due to lack of power supply and under-designed output stage. Now they dont' even test them at 4 ohms as most designs can't even cope with 6 ohm loads. With results like this below, can you imagine what you would get if trying to run 4 ohm speakers or speakers with big impedance swings???
Yamaha RX-V450 84 wpc @ 8 / 64 wpc @ 6 ohms
Yamaha RX-V650 126 wpc @ 8 ohms / 73 wpc @ 6 ohms
Sony STR-DE897 125 wpc @ 8 / protection mode @ 6 ohms
Sony STR-DE697 130 wpc @ 8 / protection mode @ 6 ohms
Pioneer VSX-D914K 143 wpc @ 8 / 75 wpc @ 6 ohms
Pioneer VSX-D514K 135 wpc @ 8 / 74 wpc @ 6 ohms
Kenwood VR-8050 128 wpc @ 8 / protection mode @ 6 ohms
JVC RX-7042S 140 wpc @ 8 / protection mode @ 6 ohms
JVC RX-6040B 94 wpc @ 8 / protection mode @ 6 ohms
The only receivers that i see worth buying, and this is only if you HAVE to go that route, are Denon's, Onkyo's and Panasonic's. All of these actually increase at 6 ohms and can deal with a 4 ohm load reasonably well. All the others are gutless wonders. Obviously, the HK gear falls into the "gutless wonder" category too. Yamaha's used to be decent, but no more. Sean
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especially one I am not familiar with; however, those that I have dealt with over the past two or three years will definitely handle a 4-ohm load. HK's specs state this as well. I didn't notice any HK products being included in your sample population.Having said that, I know for a fact that the Yamaha and JVC's cannot deal with less than 8 ohms. I was a little surprised by your comments of the Sony units going into protection mode at 6 ohms. All of the STR-DE series units I have seen had switching on the back to set the main speakers for either 4 or 8 ohms. In any case, the caps on Sony units heat up very quickly even at moderate power, and the units will go into protect mode "for no apparent (valid) reason" sometimes.
Yes, there is a lot of crap out there. Prices keep going down, yet the features they offer to the unsuspecting public keep going up. No one receiving licensing royalties are giving up any of their money, so guess where the shortcuts end up?
...your speaker connections. My AVR 7200 did this a couple of times until I discovered that some speaker wires were touching each other in the back due to the tight real estate there. You might want to try rewiring everything very solidly. Also check connections at speaker ends.
sounds to me that either your speakers are too low ohms or you have a short in the speaker wires. Third choice is an fault in the system.
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