YAMAHA AV RECEIVER NO SUBWOOFER OUTPUT RX-V457 RX-V557 HTR-5840 HTR-5850 DSP-AX457 DSP-AX557

This unit was brought in for no sub woofer operation, well just a hum/buzz when the sub woofer was hooked up. I determined that the sub woofer had no shielding ground. After a pretty extensive tear down I found some damaged circuit traces, possibly caused by either a ground loop or even an electrical storm discharge(lightning). After this repair and after I finished recording I did AC leak test this unit and found no more that 200ua leakage... well within the acceptable limits. If the sub woofer is eventually brought in for repair I will post a follow up video. If you would like to support my video efforts please consider making a donation at www.paypal.me/... Remember with your help we can keep these things out of the landfill and out of the recycle bin! Thanks for watching.

[@Wil_Bloodworth]

Wow. That was truly impressive. Thanks for sharing!

[@gatorgotme]

Thanks for showing us the trouble shooting as well as the fix. A donation on the way.

[@buildstoys]

Nice video, thanks for taking us through the schematic and testing.

[@BABYGODZILLA2009]

Dear Norcal, love your videos, I follow your videos all the time. I have a problem with my Yamaha RX-V685. I bought it brand new from Australia (since it was not available in my country at the time) back in December 2018. Worked like a charm till September 2019 where I had to travel overseas again for a month. I unplugged everything from the wall socket and came back after one month. Plugged everything back again, worked fine for a day, and the FL display on the Yamaha started acting up. It displayed some weird symbols and the screen went off. I switched off and switched on again, and the display does not come back on. But the rest of the AMP works just fine. However, if you leave it on for a while, you can see the weird symbols come on again, and once in a while (very rarely) you can see the correct display what should be displayed. I took this to the Yamaha dealer in my country, and they said the whole digital processing board (that is where the FL display ribbon cable connects) had to be replaced. I am convinced that this can be repaired and the dealer just too lazy to trouble shoot like you do. Do you have any pointers which I could trouble shoot this kind of problem? I tried to find the schematic diagram, but couldn't find any. Maybe my resources are not as good at yours. Your input on this is highly appreciated. Thank you so much and keep up the good work. Look forward to hearing from you.

[@norcal715]

I will try to look into that if I ever get a chance. Sorry you're having such a problem with such a nice receiver

[@giorgostexnikos6976]

nice video.exelend jump.more video like that please.

[@frankpitochelli6786]

Another good job buddy... So glad you are making videos on a regular basis.

[@jalal76]

Well done

[@antraciet]

That was a difficult repair ! We saw experience at work.

[@cdrepaircd5598]

must be one hell of a subwoofer to do that

[@malikuswari7450]

Help me alot 👍 Thanks alot🙏 Greetings from Indonesia

[@pinturoy6033]

Nice video

[@daskprashant]

Brilliant

[@FulvioGa]

I am looking forward to watch the customer's sub woofer checked out.

[@treadmillrepair754]

This is not normal, maybe subwoofer have some problem.

[@alslack1111]

Mine just do factory reset and works pre out sub both active again😊

[@chantellemckay231]

omg I've been googling all night and have only just got a hit on your vid fingers crossed 🤞 you have solved my problem . will test a different subwoofer on my Yamaha htr-5072 prior to attempting 😬 your diagnostic as mine has 2 sub outs which both won't work I pray that it's sim0le to solve

[@SabretoothBarnacle]

This was very informative. I have a V483 which I bought from new and I've just plugged a sub into the preout and I have the same annoying hum. I can't see how it could have possible blown the traces as the subs powersupply is double insulated. I guess I'll give it a teardown at some point to understand whats wrong.

[@ThePreyMantas]

Good catch! We were 5x5 on the repair. Good One! (Did the customer ever agree to bring in the sub-woofer for a check [would be a really smart idea on their parts].)

[@julessingh7353]

Can you help understand how to connect subwoofers (Klipsch-ksw10) to a Yamaha HTR-5840

[@Lex-pj7dt]

Thanks for the video. My subwoofer on RX-V481 popping loud everytime I operate the receiver, such as change DSP or source or pausing the movie. Any suggestion?

[@alonzorodriguez7198]

Good Job, Thank You!

[@robertcalkjr.8325]

Good job, thanks!

[@marksimpson4783]

That was very interesting, wish you would investigate what the problem is with Yamaha CX A5200 XLR outputs. Bought one and it doesn't like my active loudspeakers via XLR, sound goes all phasey in stereo.

[@voitano73]

Im Wondering what could cause this PCB failure. High current? But through which component, those small smd parts are OK....

[@papercut1987]

I have a RX-V557 and I used a RCA to 2 bananas cable to connect my active sub, but still no sound. it has a humming noise when i switch those banana connectors. I did the multi-meter test, ground shows 0 ohm.

[@izzzzzz6]

Nice but i think i would have put a fuse in that 2nd board.

[@mohamadasriabdulazid4784]

That is a very rare fault. Anyway nice video.

[@luisfloresm1]

You a true technician, would you be willing to work on a Yamaha rx-a2010 that has no sound if I send to you.

[@mixinginthebox]

Nice ty..

[@vladimirkovalerchik9285]

Hey saw your video, thanks a lot for the into. Have a problem with subwoofer outs, both front and back are partially working. For a Yamaha amp RX-A2021 both sub outputs sending very quiet signal to the sub, there is something coming out but it’s really low maybe 10-20% of what it should be, any ideas what’s causing that? Speakers set to small and crossover tried 90 and 110hz. Do you think it could be receiver hardware related?

[@norcal715]

Look in the original owners manual and do a complete reset 1st. Let me know if it helps.

[@vladimirkovalerchik9285]

NorCal715 factory reset did not work. I tried maniacal setup to make sure speakers were set to small and crossover correctly set. Still nothing, when trying to use ypao it says error W1 out of phase. Could it be an issue with the sub? It’s brand new Polk psw108. Thanks again for your help.

[@norcal715]

Try and play music from a mp3 player or phone and connect it to the sub, is the audio still low? Just trying to isolate a receiver or subwoofer issue.

[@randyr.parker2698]

NICE! :)

[@saddle1940]

Nice fix, but are we done? As the guy says in the movie "The Core", what's on the other side of the equation? What would have burnt that track clean off the board, especially an earth/ground track? Has the power supply in the sub-woofer box become dangerous (switch mode with direct mains connection, failure of insulation or something.). Get payment quick before the customer is in the morgue.

[@rameshtharusha1476]

How to reset yamaha rx v 2095

[@Imsa__gar]

My Yamaha rx v1900 Right Surround Speaker is very low ( not working proper all wire setting is ok ) IC issue ? Or something else ?

[@Kitswain59]

I have a 20 year old Yamaha HTR-5550 receiver. My 15 year old JBL subwoofer stopped working a couple weeks ago. Tried a new subwoofer and not working either. I've been troubleshooting with no success. So is the problem my sub output? Any ideas?

[@norcal715]

Hook up a MP3 player or equivalent to the input of the subwoofer (a known good audio source). If it plays sound then the subwoofer is good.

[@luisenriquez198231]

What sub you are using is it powered sub?i want to ask if passive sub will work on this receiver? thanks

[@pavanenterprises7490]

Hi I have issue my sub will be running well for 2 to 3 songs but suddenly it’s starts humbling continues after keeping sound Down and raise the volume 1 or 2 point it’s ok if we keep more than that it’s humbling Can I get any solution

[@norcal715]

What brand and model sub is it? have you tried it with a different audio source to rule out a receiver issue?

[@cynaptyc]

Also a possible wrong ohm load at the speaker heating up primary traces?

[@travisgulley2652]

If you use crappy rca cables or use rca y splitters your gonna hear a humming sound from the subwoofer output

[@carelcoetzee5464]

Hello i have a yamaha rx-v767 and its just giving me n ham on the sub output put when i put the volume on max i can faintly hear some audio coming from the subwoofer

[@norcal715]

Woo ho! Free ham! (Homer Simpson}

[@ledhunters]

So, how much could one charge for repair like this?

[@abeleski]

So what caused those traces to go bad? Was it the sub?

[@ThePreyMantas]

I think NC is suspecting an issue with the sub-woofer itself. Hopefully the customer is smart enough to let him check it out and correct the issue or it could continue burning stuff up doing more damage. All the components on the boards checked out ok.

[@fortnitejonne9096]

Hey, my rx-v371 wont recognise my subwoofer even tho i have everything correctly. What should i do. There is no sound when i put or remove my cable in subwoofer output. It gives 0 sounds for subwoofer

[@norcal715]

If you touch the tip of the subwoofer plug (unplugged from the receiver and still connected to the subwoofer) do you hear a humm? You should and if you do not the sub is the problem, not the receiver.

[@fortnitejonne9096]

@@norcal715 yes my subwoofer is ok, i used it on my old speakers and it worked well. Now i don't know why that receiver thing doesn't recognise it

[@CarlosFernandez-ro5be]

@@fortnitejonne9096 Hi ! can you resolve it ? i am from argentina. My english is so bad. I need help for remute control. Thanks

[@larrysmith7175]

This is for an experienced pro who should already know how to do all this.....not for a novice.

[@Djamestm]

17 minutes of go to hell.