Question about Yamaha RX-V2400 Receiver

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Receiver goes standby everytime I change settings

The receiver works fine as long as no setting such as Speaker level,stereo to 7 channel/dolby (or vice versa) is not changed. It has happened after a recent lightning strike on satellite tv receiver antenna entered the satellite receiver via the coaxial cable,passed through the RXV2400's body cover and then through the subwoofer output cable in to the subwoofer electronics and thereon to the earthing of the AC supply.At the time of strike,all units were switched off ( Not Standby) still the damage occurred because of lack of earthing,learnt after incurring a great cost! Please suggest remedies.

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  • Tinkal Aug 27, 2007

    I have further noticed that during the few seconds between power on and speakers relays being on all settings can be changed without affecting the unit,but any change after that will make it go in to "off mode" with the displays off, speakers off with a thump etc. Again,the unit goes off mode when the Audio CD player (Connected thru coax)is switched off while it was playing,which was not the case before the lightning strike.When the unit is up and running for say 10-15 minutes, it accepts change of soundstages say from stereo to Church/Rock etc with a largish thump of speakers without going in to off mode.It does not accept changes in soundstages from Dolby/DTS to 2 Channel Stereo nor speaker level setting etc and goes off in any case.

    Thanks for going thru this longish description of symptoms.Looking forward to your suggestions.

  • Tinkal Aug 28, 2007

    The remote/buttons on the unit both yield the same result.I have tried it without the sub woofer connected, as the subwoofer electronics was badly damaged.As I have explained earlier, the lightning surge came in via the satellite coax to the satellite unit, which incidentally touched the casing of the Yamaha unit.From the casing of the yamaha unit it found an outlet in the output cable going to subwoofer(SWF)through the RCA plug .While at subwoofer it finally found the AC earth as the AC supply cable to SWF was 3 pin and in all else (Satellite indoor unit and Yamaha unit) only 2 pin(Phase and neutral).As you might imagine,the subwoofer outlet (RCA plug)at the yamaha unit and nearby earthing(DC) area of the PCB on which it was mounted was completely fried.I also suspect it is probably a case of some earth wire that has burnt,but unable to locate where.I have repaired the burnt PCB with copper wire soldered wherever required.I will upload the photo next time.Meanwhile, let me look at the main PS board and the control unit DC earths and report back to you.

    Thanks & regards..




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What if anything have you had replaced/fixed so far? a fairly likely problem is going to be IC (chip) damage in the control electronics, also quite a number of soldered joints could need attention, all components could potentially have been damaged in some way. I mostly suspect it would be a problem in the power supply/conditioning part of the unit, in particular the ground/earth connection from the main control circuit board to the power supply. Also make sure the main power cable of the unit has a good earth still. If you want a bit of help checking this yourself, you will need a multimeter, possibly an ESR meter, a soldering iron and a digital camera. post us a shot or two of the inside and we can hopefully talk you through what to check. An independent ground for this sort of unit is useful and cheap and easy enough to do - please ask again if you want help with this. Hope this helps :)

Posted on Aug 28, 2007

  • Anonymous Aug 28, 2007

    ps - have you tried it without the subwoofer connected yet?

    pps - the main control board ground probably goes directly to the case, as does the external ground connection.

    ppps - are you using the remote or buttons on the receiver? there could be a problem with the remote recieving part.




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