Jvc rx-dv31 standby light comes on, but wont turn on, just clicks then turns off
So the other day i was jaming some tunes really really loud for over an hour i think while working. then all of a sudden my receiver/dvd combo just shut off. it seemed a bit hot where the power supply is. i opened it up and didnt notice any fuses blow that i found.
i disconnected all cables and plug it into the wall now and the standby light comes on. i press the power button and it just clicks, then turns off, nothing displayed to screen.
i really really love this system, and have looked at replacing it but nothing even comes close to how sweet this thing is. plz help
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It will be one of the transistors that regulate the lower volatges (5V, 12V...) I ffixed mine. the heatsinking on those transistors is pathetic, and its no wonder they dont last. Mine was the 5V circuit, which also supplies the DSP board. so if you are getting a DSP NG, that could be that as well. Check Q1434 and Q1404. if one is faulty, it drags the other one down with it. Good luck.
Turn off all power, really should wait several hours for the capacitors in side to discharge. Remove the four screws from the sides and three screws from the top cover. Lift from the back pivoting towards the front to remove the cover. Inside you will find three small fuses. One fuse by itself and two close together. The fuse you need to replace is the fuse closest to the rear of the set of two. It is located next to the power clip for the fan. I believe the fuse is a 120v 2 amp fuse but check the board to be sure. if the fan is not working (you should be able to hear it) it will need to be replaced or if the power is not getting to it, a new power source added. I used a 12v 50ma adapter from the junk box.
It sound like a bad connection. The first thing that I would do is tighten all the ground screws that hold the circiut boards and the heat sink to the chassis. If that doen't fix it, flex the circuit boards slighty to see if the relays chick on and off (disconnect the speakers first). It could be on the input board, on the relays themselves or just about anywhere.
Just worked on a Sony with a similiar problem. I replaced the Power Amp Drivers. They were labeled as IC's on the circuit board. They were relatively inexprensive, around $33 total. This fixed required knowledge in using a Soldering Iron and Desoldering Wick. Also I had a schematic of the circuit board which can be purchased on the internet. Hope this works for you. It might be best to just have a tech look at it, if you have no electronics knowledge.
Sounds pretty bad to me, I had a computer monitor that did a similar thing when plugged in after blowing, it's not a good thing. I didn't even bother to mess with it. You may have to replace the whole power board or at least have a whole handful of pieces to re-solder. It most likely isn't worth it unless your other tv's are under 30" and you don't have a lot of money ;)
If you dont hear a click theres a problem in the standby power supply. if you do hear a click theres a problem in the Main power supply or sweep supply. Get a good tech to look at this for you if your not a tech. Good Luck