Yamaha RX-V371 Repair and Test

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#electronics #repair
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I purchased a faulty Yamaha RX-V371 Home Theatre Receiver. Will I be able to fix it?

[@SalemTechsperts]

This is awesome. The first thing I ever fixed was a Sony receiver from 1997 that my father put on the sidewalk because it wouldn't turn on anymore. This was 2005. I thought to myself, "I wonder what makes this thing work" So I brought it up stairs to take apart. Turns out the plastic power button was just misaligned and wasn't pressing the switch to turn it on. That receiver worked until 2015. Now seeing receiver's repaired always brings a smile to my face.

[@tony359]

That was worth the effort! So many things end up in the rubbish because of such simple issues. I'm glad I brought back good memories, thanks for watching!

[@MM-vs2et]

Well, what is to be expected from the _Greatest Technician That's Ever Lived_

[@faisalalshamsan2466]

Great repair! I can tell you’re passionate about what you do!

[@hermannschroder6237]

Part of this video did help me : system stopped working abruptly ; too much heat this summer season ? Finally I followed this advice : pull the main plug - then plug in again = system works again ! Thank you.

[@FarnhamJ07]

I bought the same amp used, with the same faulty cap, and did the same repair, around when you released this video...but only now did KZbin recommend this video to me! :P

[@tony359]

Boo, KZbin Algorithm :) Good to hear another V371 is back to life, well done!

[@ricardoperez-ms8dp]

This was amazing and now I have no option but to sub. Thanks for taking us with you!

[@tony359]

Thank you!

[@apachecomm]

First of all, thank you very much. so it couldn't be explained so well. You are like a real teacher. I met you for the first time with this video, but I am very pleased. You explained very well. Thank you so much. i have the same problem and i will try all the steps in the morning

[@tony359]

I'm so glad you liked it and thanks for your kind words! I hope the repair goes well!

[@alanturing2094]

Only just stumbled across this video and throughly enjoyed it! Brought back memories of the past!

[@tony359]

Fantastic! Thanks for watching!

[@Carlsings]

Really liked this video. I spotted that bulged cap early on, but you went through every option which is a great learning experience to detect WHY this power was not working to spec. Some caps look bad but aren't some look good and are bad. I am NOT good at this but try anyway, haha and would like to learn. I think a couple thousand$ in meters and tools and learning to read schematics (which you actually gave a quick tutorial here) and getting service manuals (for free too ;-) would get me on that path, maybe. But your Video made the detection process so nicely transparent and logical. The camera work with very useful macro and the attention to show the real part associated with the schematic was lovely. Cherry on top was your backing music was ancillary and nicely quite low in the mix so didn't interfere at all with your narration.

[@tony359]

Hey, that is very very kind of you to say, thank you a lot! I'm thrilled to hear you enjoyed the video! I did spot the capacitor too but I like learning things and replacing a capacitor and call it a day wouldn't have been fun at all! :) I'm glad you enjoyed the journey! It took me some time to get to a point where I can (barely LOL) understand schematics so please don't give up! Also tools are not too expensive nowadays. A good tool will make your life easier (I absolutely LOVE my fluke meter, it destroys my EXTECH hands down) but there are buckets of cheap tools on the market, some of them are actually pretty good. I don't think you need thousands - say hundreds! A decent meter, soldering iron and I would say a scope. I hope to see you back soon! and thanks for watching! :)

[@Carlsings]

@@tony359 you're welcome. I've now taken my HTR-5960 apart to get to the bottom PCB of 5 boards and test the caps that looked slightly pudgy on the top. They all tested good though (sigh) so it's put it all back together and try to do in circuit tests now.

[@tony359]

@@Carlsings Well done! Did you check the service menu to see if the receiver can tell you why it's not starting up?

[@Carlsings]

@@tony359 well I don't have a service menu on this model I'm pretty sure, if that's what you mean. Setup menu, but not service, unless I'm missing something.

[@tony359]

@@Carlsings on the 5960 the DIAG menu can be accessed by pressing INPUT and MULTI-CH while powering up. You should get a message telling you why the receiver powered off last time (something like "I PROTECT A"). I just downloaded the service manual and took a look, it's on elektrotanya.com :)

[@MrBPDude]

Thank you for sharing this! Saved our RX-V371 going into diag modus..

[@tony359]

That's amazing! Thank you!

[@reymartroldan2798]

Thank you sir ,I done my work when I saw your vlog

[@solosailorsv8065]

Another in-depth and insightful set of techniques ! I usually start with a Sniff-Test for that classic fried electronics aroma, a slow visual (as I figure out the labels & circuits) , and a needle probe to check for loose/un-soldered pins.... THEN get TECHIE !! LOL

[@tony359]

ahah that works too! Thanks for watching!

[@retititu]

quiet easy fault, but your explanaitions are great. very entertaining and informative! hold it up

[@tony359]

Thank you! I'm glad you liked the extra explanations. I could have just replaced that capacitor and call it a day but where's the fun then? :) Thanks for watching!

[@retititu]

@@tony359 yes, absolutely!

[@nicolaspanier1245]

Great video with clear explanations! Thank you

[@tony359]

Thank you for watching!

[@ted-b]

Excellent work. See, a proper technician doesn't just fire the parts cannon hoping for a lucky hit!

[@tony359]

Thank you, very kind of you to say! And thanks for watching!

[@Uriel-vf7hp]

It was not necessary all testing however results very useful to know how to test CPU and signals. Good job.

[@tony359]

Of course but the purpose of the video is learning and tinkering, not just fixing it. Glad you enjoyed it!

[@jamesr.schroensr8361]

I really appreciate you helping us.

[@tony359]

Thank you for watching!

[@saarike]

This video was really great!! My humble thanks.

[@tony359]

Thank you for watching!

[@miludion4802]

Great, great! Very useful 38 mins of my life !

[@tony359]

I hope this is not sarcastic LOL! :) Thanks for watching!

[@miludion4802]

@@tony359 No, it's not. i have a Yamaha HTR-2067 and this information is useful when problems occur. Thanks again.

[@harrisefraim751]

Greetings and great video!I have the same amp but recently suround and center speakers gets no signal and stopped working. I ve run the self diagnostic Test All and no sound come out,while front,right and sub works.Could it be that the dsp chip is faulty or perhaps the relays for Center and Suround?Although i am getting the front unit display DSP logo and the suround and center speakers normally. Any advise could be useful!Thanks!

[@tony359]

Hello Harris and thanks for watching! The are two "monolitic" amplifier chips in the 371. Looking at the schematics, Surround and Centre are not on the same chip. Anything is possible but I doubt those chips are both faulty. It could be anything I'm afraid: faulty relays as you suggest or also faulty muting transistors. If you have an oscilloscope, the sound is converted back to analogue in the IC263 and then it gets into a selector/volume chip IC21(that could also be bad). For reference the centre channel gets into IC21 on pin 92 and gets out on pin 22. If you could probe that pin and see if anything goes in (and then out), it would be a start. On the main amplifier chip, centre channel is entering on pin 15 and getting out (amplified) on pin 6 before it reaches the relay. Without an oscilloscope it may be a bit more complicated but I guess you can still see signs of noise using a good multimeter. I hope this helps a bit - the schematic is available online at elektrotanya.com. Good luck!

[@dktr2]

Good job yamaha with protections & information.

[@tony359]

Thank you!

[@mjrmstie]

Thank you, same receiver, same problem, same fix. I had no info on the reset mode.

[@tony359]

Amazing thanks!

[@ravikumarbn]

@tony359 Thanks for the detailed explanations, Refreshed my past quest of electronics. Picked my faulty Yamaha RX-V365, It was in the dead. No AC volts in the secondary of standby transformer, Replaced the fuse in the standby transformer, Started seeing the AC voltage. However, Don't see 9.4 rather getting higher voltage approx 20V AC. Looks like the load is light or no load at all. The schematic looks similar to V371. Any suggestion's, Do i need to look into primary/ secondary circuit or both for faulty resistor or capacitors.

[@tony359]

My schematics are always "incorrect" when it comes to voltages. A transformer is a transformer, either it works or it doesn't, I doubt it would suddenly output twice as high voltage. I wonder if some schematics are for 120V and others for 240V? Anyways, I would focus on te voltage regulators. Do you see the correct standby voltages coming out of them? That's required for the CPU to start.

[@ravikumarbn]

@@tony359 Sorry for the delay, I see constant +3.3 volts in the CPU board.

[@exaspere]

What kind of cap did you use I have the Rx v1600 one of the capacitors is blotted I see the Amp board is X7094-5 the same as The 5990 2 would you say it is the same board Thanks

[@tony359]

Hi Marc, the capacitance and voltage is indicated on the capacitor itself. The capacitance, in uF or micro Farad, has to be the same. The voltage must be the same or higher. Ideally you want 'low ESR' capacitors and rated for 105 degrees. If you can't read those values on the capacitor itself, you should be able to download the service manual of your AVR. Good luck!

[@jimc1268]

I have a Yamaha AV RX-V1065 that when using the tuner is intermittent. Any suggestions where to look?

[@tony359]

I'm afraid I am not a massive expert of Yamaha receivers, I wouldn't know what to suggest, sorry!

[@MegaFREEAIR]

THANK U THANK Y THANK U A LOT, Even giving these free and good explanation u apologyze us for showing us the diagrams , u r so gooog, THANKS 2 U AGAIN

[@tony359]

ahah I'm too British! It's just that my average audience doesn't like schematics :) You're very welcome!

[@orghoz]

Perfect, as usual

[@Majia-Liu]

Great video! I have the exact same model. One of the channel recently stopped working (Front Left channel) during music playing ( starts normal but suddenly on and off and then no sound at all), I switched the speaker connected to another channel - Front Right and it worked, which means the speaker and cable are working. Any suggestion as how I can fix that channel (Front Left) ? Really appreciate your advice. Thank you!

[@tony359]

If it was intermittent maybe it's a bad solder joint? Try moving the unit while sound is being played and see if it comes back. If it's the "amplifier module", those are hard to find and pretty expensive I'm afraid. Good luck!

[@andrewlittleboy8532]

You mentioned about de-oxit in the UK not being available but I’m in the UK and have used it for years and indeed bought some the other day and is available quite readily online even Amazon. It's around £21 - £25 a can for D5 and around £30ish for Fader Lube version.

[@tony359]

You're right, I've seen it too but it must be on and off as it's not available right now - unless I'm looking in the wrong place.

[@andrejfx8505]

Great repair. All that probing and diagnosting , and you knew at the start that is faulty cap

[@tony359]

Thank you! Just swapping the capacitor would have been boring :)

[@joemartinez5405]

Tony I have a Yamaha rx-v367 and I can't control the volume. The control just spins without reaching a minimum or maximum. I suspect that the control in no good. Do you know where I might be able to find a volume control for this?

[@tony359]

According to the service manual the volume encoder (it's not a trimmer) is EC12E2460802 and you can find it from electronic distributors. That said, I would maybe inspect the boards and the traces. The little volume PCB (operation(6)) goes to the main OPERATION board. There must be 3.3V and GND going to that board and the volume will return VRA and VRB (volume control pulses). Those pulses only travel through the OPERATION board to then go to the DIGITAL board via CB101 connector. From there, the pulses reach the CPU directly (IC221). Before replacing the encoder I'd check for 3.3V and GND at the little volume daughterboard. If you have an oscilloscope you should be able to see the volume pulses on the VRA/VRB lines (which eventually become VOL_RB and VOL_RA). Good luck! :)

[@joem3968]

Just watched your video cause im having trouble with my rxv673 are they more or less the same unit. Thanks for sharing.

[@tony359]

Thanks for watching! I hope you can fix yours. That capacitor seems to be a known issue with many Yamaha apparently!

[@DhakaMusicOmar]

hello brother, I have an issue on a technics svi , 4.2 millivolts on one channel, all the parts are hopefully okay , what do I do now to get rid of the 4.2 millivolts, and the sound is also a bit distorted at high volume

[@tony359]

Sorry, I'm not familiar with that machine!

[@WestCoastDP]

Good job on the video. For years Onkyo had bad HDMI boards. Many are in the trash. Seems the Texas Instruments DPS chip often failed because of heat, etc. I think in the last 5 years, those problems have gone away. Hopefully.

[@tony359]

Don't mention them! I have two which are paperweights because of that HDMI boards. Nothing to do with heat, it was a manufacturing defect from Texas Instruments. No (reliable) replacements available so 25KG of good electronics go in the trash. I hate that! Thanks for watching!

[@dennyan0319]

Great! You video is very helpful to me. Now I also repair my RX-481, now. Have you ever suffer the relay clicking repeat after power switch turn on? I also open case and check the clicking sound source. The clicking sound comes from output stage relay.

[@tony359]

Hey thank you! I hope you will succeed! I had that clicking thing with an Onkyo but I was not able to fix that I'm afraid. I am not so familiar with the Yamaha series to be able to help you I'm afraid but I would start with the basics - check all the voltages. Also check that there isn't any DC out of the terminals, if an amplifier is outputtin DC, the protection circuit will switch the supply off. (Disclaimer, sorry: please be careful as there is mains voltage in that device. Open the device at your own risk! :) ) Thanks for watching!

[@Carlsings]

@@tony359 I have exactly the same problem, receiver turns on for 3 seconds and then goes to Standby. There's a click from the PS board area, maybe the relay? I don't see any bulged caps. I know I need better multimeters and a cap tester would be nice too, plus learning everything about how to use them wouldn't hurt. P.S. Yamaha HTR-5960

[@tony359]

@@Carlsings If you start the unit with the service mode (tone control + straight and then POWER ON) the display should tell you WHY it switched off last time there was an error (and then it will likely switch off again). That might help a bit! :) See 21:30 on my video. Good luck!

[@buntykainth3699]

Great repair

[@tony359]

Thank you!

[@teresitamontebon5342]

Thank you your presentation Tony

[@tony359]

You're very welcome!

[@malabarspyder]

please tell me what is that CAP tester you have. it looks very useful!

[@tony359]

It is indeed! It's one of the many testers available, you can find it on ebay. There are maaaaaaany versions but they are inexpensive! Thanks for watching!

[@1212look]

you did not mention and just wondering did you first try waking it up by pressing a sequence of buttons after it might have gone into damage protection mode, which is what happened with my rx v671, I thought it was dead and gone, eventualy found the right sequence and now working again. Did a overdue firmware update as it was connected to a new 2023 4k tv.

[@tony359]

I'm not sure I follow but I did find the sequence of buttons at some point in the video :)

[@1212look]

@@tony359 Sorry my apologies, I must have missed that part in your Video - Yes you did check it 😊

[@jonessoares6896]

Great work sir thanks for sharing regards Jones Soares goa india

[@rdrhouse]

very interesting to watch, subscribed.

[@tony359]

Thank you, I'm glad you enjoyed it!

[@jonessoares6896]

U got a great idea to work sir regards Jones Soares goa india

[@Chas75]

Hy Tony, where did you find the schematics? looking forward to try to fix my rxv 383

[@tony359]

Hey Francisco, I usually google it. I see it's available on elektrotanya.com - I checked and I see that they also have the service manual for the RX-V383. Good luck with your repair!

[@Chas75]

@@tony359 Got it, thank you very much, lets get to work!

[@alvarocollado9443]

Hi everyone, I followed this video as a guide and changed one of the capacitor, now it seems to switch on but the display doesnt show, do you have some idea what can it be?

[@tej262]

Bro teac 8800 av receiver only front lift right chanels not sound bro centre back sorrounding is good work but problem plz reply me????

[@tony359]

Sorry, I am not familiar with the Teac 8800!

[@philiphan6997]

Great video. I have a 481 outputing very bad static sound. Unit powers up but just the sound is very bad. What are you ideas on this if you may. Thank you.

[@tony359]

Hello - thanks for watching! It's difficult to diagnose from here. Does it happen on all channels? Does it mute when you change input? Does it follow the volume fader?

[@philiphan6997]

@@tony359 I also have a blown fuse. Do you know what driving the over current to blow the fuse? My power transformer fuse is good.

[@philiphan6997]

I put a new fuse in and it didn't power on. but got a protection mode. I did combo button push to clear the protection mode and just about when the displays showed the fuse blew with a big flash.

[@tony359]

@@philiphan6997 what’s the fuse label?

[@bobcityrocker]

I have the exact problem on my 371 and the same CAP is badly bulged. Mine after trying to figure out what was going on just stopped powering on altogether. Power button does nothing, no clicks, no nothing. The unit is totally lifeless. I am going to attempt to change the CAP but concerned as to mine went from being just like yours to completely dead. Any idea?!

[@tony359]

It should be normal. After several shutdown errors the unit will only start in service mode. Try that, it should come back at least temporarily.

[@somebodyx]

When the sinewave notches just a little bit that's about 1% THD. When clipped off enough like you saw, that should be around 3%. Helpful to quickly visually estimate output power. Solid state amps are usually characterized at 1% and tube amps at 3%. To be more precise we need the FFT analysis.

[@tony359]

Absolutely. Mine was a rough estimate. As you say to get proper values I’d need to calculate the THD. But a visual check gives me a ballpark which should be telling me if all is in order or not. Thanks for watching!

[@somebodyx]

​@@tony3591% is just -40dB so the FFT function in the math menu of an affordable eight bit oscilloscope can come handy.

[@lukeroberts914]

Hey Tony I have a rx-v5000 and I’m getting no audio and when I try to update I get an error 0010 any idea what it could be?

[@tony359]

I'm afraid I am not a Yamaha expert, sorry! If you download the service manual, you might discover the service menu on your 5000. Maybe the tests will point you to something.

[@Shadowban69]

From now on when I encourer a protect...ill try the filter cap. DC ripple is not as fun as butter ripple ice cream, but the fix was pretty sweet.

[@tony359]

Thank you! It's a long time ago but I remember seeing the bulged capacitor when I opened it. Still it was nice to play around a bit to find the fault rather than just replace parts. Thanks for watching!

[@adorableanish]

I get “version error” on startup of my unit. Any ideas?

[@tony359]

I’m not an expert on Yamaha but I had a look around. Did it happen out of the blue or after a power cut or firmware update? Try unplugging, disconnect everything and then powering it up again. Does it work? Thanks for watching!

[@halokillernoob]

I have the same problem but with a TSR 5810. I can't even get mine to boot up into diagnostic mode. No reaction. No clicking. I tried all the button combinations even holding power for more than 15 seconds. Won't power at all. Do you have any idea what this might be? I think the microprocessor is frozen up like yours was. Where do you find the service manual? I need one for mine.

[@tony359]

I found all the Yamaha service manuals are available here: elektrotanya.com/keres In your case I would go back to the start: do you have voltages out of the power supply/operations board? Please be careful and open the unit up at your own risk. :) Thanks for watching!

[@halokillernoob]

@@tony359 Okay, I was able to find mine on hifiengine. It’s got 120v coming in. When I am looking at the schematics page like operation(1), (2), (3), etc. is that the order in which the unit operates? So I should begin looking in operation (1) for problems and then go to the next one if I don’t find anything?

[@norctec6755]

Great job! What is the amplitude of the 1Khz signal from the function generator that you used to feed the input of the amplifier?

[@tony359]

Thank you! The signal was 1.72V peak to peak - 590mV RMS. To be honest I did not think too much about the appropriate level for the test, but the amp was clipping the output around reference level so I thought it was ok. Consumer input level should be -10dBV or 0.316V. If this is RMS - I am not sure - then I wasn't too far away from that! Thanks for watching!

[@banyumilinengsegoro7654]

Excuse me sir, may I ask? I have a Yamaha RX-465 receiver... the bass sound vibrates abnormally... I use a 6" 8 ohm speaker on the front and 2 4" 6 ohm speakers on the R and L... the display flashes when the bass sound? Can you help me?

[@tony359]

It's really impossible to help from here I'm afraid.

[@banyumilinengsegoro7654]

@@tony359 Maybe you can help analyze which parts I should check

[@bri4n993]

What is the max output watts i can draw from this receiver with a subwoofer ? 100watts?

[@tony359]

Specs say 100W at 6 ohm.

[@wiji-qf8xi]

nice video...how to measure crystal clock with digital multimeter, i don't have osciloscope...thank you

[@tony359]

Some meters have a frequency reading. If yours doesn’t, then I’m afraid you can’t do that. There are very cheap oscilloscopes available though. Thanks for watching!

[@felipejuarez5304]

Exelente trabajo !!!

[@tony359]

¡muchas gracias!

[@jklandsale6946]

My yamaha Rx-V371 receiver is not working, it is on "Protection" mode. Technician said DST chip should be change, but unfortunately i couldn't find it. any solution from you?

[@tony359]

it's hard to say. To be honest the 371 is a budget unit so I am not sure it's worth any money. Not sure what the DST chip is but if it's one of the amplifier modules, those are hard to find and kind of expensive so...

[@user-oy1kt6vl6r]

kindly tell me the solution i have yamaha Rx v861 Master audio with HDMI when i play dvd player with HDMI suddenly avr off avr not on till now

[@tony359]

I'm sorry, I have no idea! :)

[@ParameswaryParameswary-uj8sl]

Excellent sir

[@tony359]

Thank you!

[@heleinedavid6334]

super vidéo, bravo👍

[@tony359]

Merci!

[@user-hr8nr1hg6l]

Hi, I need a help. There's an issue with my YAMAHA HTR AVR. Its not turning ON even after following the steps like pressing simultaneously Info+Tune Control+Power ON/OFF button. But when i tried buttons Straight+Tune Control+Power ON/OFF button I can hear some tick tick sound inside the system. What could be the problem? Please share the details how to solve this issue. Thank a lot in advance. Please reply.

[@tony359]

I am not a Yamaha expert I'm afraid. Start with downloading the service manual for your exact model - which you haven't mentioned. See what's the correct procedure to get into service mode. Remember that if the unit shut down at some point is for a reason so you'll have to find out what's wrong with it even if you manage to get into the service menu. Good luck.

[@joeydelmarsjr.646]

loved your video. I need help my bluetooth on my unit is failing, keeps disconnecting from my tablet and im sure its not the tablet because the tablet works good on another unit. how do i replace or fix my bluetooth in my avr rx-v681?

[@tony359]

Thanks Joey - I'm really not familiar with BT. Was it working before? BT is a protocol, there are many versions around, I've had BT devices not working well with others but not for a HW fault. Before I'd think of a fault I'd try another device. Does your unit have a firmware update available by any chance?

[@joeydelmarsjr.646]

@@tony359 no updates available. It was working before no issues now it disconncets randomly every 3-5mins. Ill try to use my phone nexted.

[@tony359]

@@joeydelmarsjr.646 It could also be that your tablet got updated - updates sometimes break things! Yes, try different devices please. If still not working, I'm afraid I wouldn't know where to look at, sorry.

[@joeydelmarsjr.646]

@@tony359 whwre can i get schematic long lines for my unit

[@tony359]

@@joeydelmarsjr.646 elektrotanya.com/ Just search for rx-v681, it's there.

[@BabyFruitBat]

I have the same V371 receiver with a similar problem but I get DC 138H as the protection fault. The silly thing is when I run Test All then all the 5 channels work fine. If I look inside, unfortunately there are no obviously bulging capacitors to be seen.

[@tony359]

DC should mean that you have DC out of the terminals. If too much DC is output, you risk to damage your speakers so the amp shuts down. If you have a multimeter, probe the channel outputs and see if you actually have some DC - I think the receiver will only tolerate a few hundred mV before shutting down. I am not an expert but in that case it may be a faulty amplifier module - those are difficult to source and expensive I'm afraid. Still, I would check the 7V output with a multimeter set to AC: it should read more or less zero. If not, the capacitor has failed and it lets AC through. I am not suggesting that capaciors are always at fault here but that particular capacitor seems to be a common fault with the V371.

[@BabyFruitBat]

@@tony359 Thanks for the pointers. I checked the 7V output and it is 9.24V so that could be where the problem lies. It points to the bridge rectifier but I have never seen one fail and give you more volts.

[@tony359]

@@BabyFruitBat my oscilloscope read 8.27V, I found the values from the service manual not very accurate, not sure why. That voltage is going through voltage regulators if Memory serves so that shouldn't be a big problem. Did you also measure the AC component of that rail?

[@BabyFruitBat]

@@tony359 The output from the voltage regulators is 1.2V and 3.3V. The AC component of the ripple is minimal, about 20mv. I also measured the DC level on the loudspeaker outputs and they are all less than 3.5mV. I am stumped now. Any other ideas?

[@tony359]

​@@BabyFruitBat You've done a good job! Does the unit shut off immediately or every now and then? Some thoughts. 1. The issue may be intermittent so you need to measure exactly when the unit shuts down. If you watched my video you saw that the 3.3V was ok until it wasn't! :) Is the 20mV on the 7V line? If that's the case, I would say that that is not your problem. 2. I think the unit would shut down when even ONE channel has DC on it. So you should measure DC while the units shuts down on each channel. 3. From the service mode, check A/D Data check. This will give you real time DC reading on the outputs - I think they are all joined together, you won't get channel by channel. It may help to see if and when the level is increasing. Normal values are 27 to 88. Reference is 3.3V when reading 255 so 27 = 34mV and 88 = 1.13V. You get 138 so the unit is somehow reading 1.78V at the outputs. Really not sure whether this is a summation of all the channels or not - should be. Anyways, if you see the value increasing and then the unit shuts down, I would then follow that route: is that a false reading or is there DC on the outputs? Detection is on pin 87 of the main chip. The signal is probed on all channels (and mixed together) via a resistor if not wrong. Page 83 of the service manual. It feels a very basic circuit which is pulled down by a 100K resistor. I hope this helps, sorry it doesn't seem like a super simple fix!

[@IrfanAli-mm1dk]

Pioneer vsx50 power on and off blue light balking please help

[@thechronic6708]

Great work, i have a Yamaha rx v767 with no sound, i was told its the dts chip and its not financially worth repairing, would you repair or scrap it? It seems to only work in multi channel mode

[@tony359]

I’m not familiar with this issue unfortunately. That is usually how Onkyo fail. But then you don’t have any sound whatsoever. I can’t really say if it’s an easy fix or not I’m afraid. Thanks for watching!

[@tony359]

I was goggling about your issue, does it work in Pure Audio? The 767 seems to be a nice beast. Are you in the UK?

[@thechronic6708]

@@tony359 no it doesn, only multi channel mode shows the speaker symbols, also like on KZbin if you heat the dsp chip, it also doesn't work, im in Cape Town South Africa

[@tony359]

@@thechronic6708 Then it might be something else? I'm sorry, I am not familiar with that design - not that I am with other brands! :) I've downloaded the service manual out of curiosity and I have a couple of pointers. 1. Indeed the multichannel input - or analogue inputs - don't go through the "digital board". They go straight into IC153. So that seems to point to an issue in that area (digital board). Unless IC153 is faulty. 2. Those AVRs have TONS of diagnostics in the service menu. I did not go through them but there are literally pages and pages of very interesting things. Maybe that could help you pinpointing the issue? Sorry I wish I could be more helpful!

[@thechronic6708]

@@tony359 no problem, thank you very much for your time and advice

[@saix81]

This was really fun to watch. I'd like to learn electronics and how to repair stuff. I'm curious to know what gadget that was that you used to test the capacitors, powered by a 9v Energizer battery

[@tony359]

Thank you! It's a very inexpensive component tester. There are a thousand different versions, I think it's called the LCR T6 but there are so many variants and copies :) It's a must!

[@saix81]

@@tony359 thanks!

[@theeverythingelectronicsst3897]

Wondering if anyone can help.. I need to order a remote for a Yamaha RX V573 AV, I am trying to program a universal remote to work with this machine..Thx

[@tony359]

Ebay? I can't help you I'm afraid but hopefully someone else can.

[@rikahoshizaki3912]

ขับตู้ 15 นิ้วไหวไหมครับ

[@tony359]

Yes As long as you stay within the maximum power output of the unit and minimum impedance - but the 371 is a pretty low power unit.

[@user-xi7sg1hn1u]

У меня случилась та же беда. Именно этот конденсатор вспух. После замены Ресивер-усилитеь работает нормально.

[@tony359]

Велл доне!

[@jeremias8900]

great video. woww

[@tony359]

Thank you!

[@miguelschoenekaimen198]

Where do you find this electric schame?

[@tony359]

Electrotanya

[@LordofKings-Raj]

My Yamaha HTR 2064 having very low sound all 5 speakers except wofferr!!!! What's the exact problem? Kindly guide.... India.

[@tony359]

Thanks for your comment but I am not familiar with your receiver I'm afraid

[@user-hm5vi6wo6r]

That was still 600 quid new and nearly 100 w per channel and the amps have been replaced allready and I know itsthe bottom end of thr line but they still sound nice and rattle the neighbours windows nicely😊🔉

[@tony359]

indeed it's a nice little unit for being a basic one! Thanks for watching!

[@brijeshjaiswalgoa]

Please make video on your home made light bulb for safety checking dead device

[@tony359]

Hello - you mean my current limiter? Yes, I should probably make a video, thanks for the idea! but the base idea is that you have a lightbulb in PARALLEL with the device so if the device shorts, the most power the mains line will provide is the value of the lightbulb, no more.

[@kennethcoutinho4439]

Great Job

[@tony359]

Thank you, I'm glad you liked it!

[@V_______K]

Help me find the firmware for the EEPROM chip r1ex24128asas0a. I can not enter the engineering menu. Standby voltage is present. yamaha rx a810. I will be very grateful.

[@tony359]

I'm sorry, I don't have this receiver anymore.

[@sergeebeza1679]

bonne video , j ai beaucoup appris sur cet ampli. j 'ai le meme problème

[@tony359]

Merci! J'espère que vous pourrez le réparer !

[@shoarectube]

Can you share the source of the schematics? I have a rx-v481 not powering on

[@tony359]

I think I found it on elektrotanya! Good luck!

[@shoarectube]

@@tony359 thank you. In my case I have the 3.3V rail, but no obvious bulging capacitor, and absolutely no visible reaction when pressing any of the buttons. Could hear a buzz some time ago after a few hours of running, but this morning I woke up to sounds of relay, unplugged it, and it never did anything else ever since. Probably will cost a few hundred bucks/euros to repair, which is borderline uneconomical. Could be a good learning opportunity though:)

[@tony359]

follow the service menu, it will tell you what's happened - hopefully.

[@PS4PROGAMER5456]

Ive got a yamaha rxv540 it turns on with a click and 3 seconds later it clicks and powers off

[@Ben24-7]

I have the same Av receiver, it went in to protection mode before I bought it second hand , I took it out of protection mode and its been working fine ever since , im guessing in my case I think who ever had it before me just over loaded the amp , with speakers that were drainage to much wattage , however im not really sure , as its not gone back in to protection mode since , I got lucky as I only paid 30 dollars for the amp

[@tony359]

If I remember the service manual right, that is a possibility yes. Mine would also work once reset but it would fail after a while. You can check WHY it went into protection mode from the service menu, which is quite comprehensive! Thanks for watching!

[@Ben24-7]

@@tony359 Thanks for the video you do a great job at explaining things so the average guy like my self can absorb the information in a useful way .

[@tony359]

Thank you for your kind words! :)

[@bellezawendell9266]

Hi sir can i ask you about yamaha sound receiver?

[@tony359]

hello - you can but I am not really an expert on Yamaha! :)

[@bellezawendell9266]

@@tony359 sir On the board of the yamaha sound receiver where is the audio input? because that's the only way I'll use his amp for the diy amp

[@tony359]

@@bellezawendell9266 which model? Do you have the schematics?

[@tonymcgeachin9906]

The front power button on my V371 doesn't work either. I use the remote to turn it on and off, so really a non working power button isn't a problem.

[@biggsmusicman]

Great video but from experience from you see a bulged cap you check it immediately could save you some time.

[@tony359]

Of course but this is for fun and to learn things. Had I just replaced the cap immediately it would have been a short and boring video 🙂 Thanks for watching!

[@joshallround]

Hey what if the factory reset doesnt work neither does it have a bulge cap you here the clicks but nothing still happen but only seeing 2.0 at the processor pins how to fix?

[@tony359]

2.0 at the processor pins? There are many pins :) And what is 2.0, is it 2.0 Volts?

[@joshallround]

@@tony359 yes the rail pins only showing 2.0 volts

[@joshallround]

Mine is the rx-v377

[@tony359]

All the voltages are coming from the operation board. Disconnect the rest of the AVR and test on that board. You must see proper voltages there. If not, then it’s a supply issue somewhere, likely on the operation board. If you download the service manual it’s easy to follow all the rails and trace them to the source. I hope this helps!

[@tarotuling1679]

Tank you♥️♥️♥️

[@tony359]

Thank you!

[@a.f.1587]

Nice repair, i didn't know some of the Yamahas used to build in these goddamn STK amp modules. Technics used to do it and Panasonic too, since they are under the same company, but not too many other companies used them. They are very hard to find, and expensive too. If 1 channel fails, you need to swap the whole module, which is nonsense. I like more the transistor-based amps, easier and cheaper to repair. I do similar repairs as a hobby, in the future i will avoid these cheaper yamahas for sure. I know, some of the higher-end models from Yamaha using transistors in the amp sections, they are more repair-friendly.

[@tony359]

I agree with you, those monolithic models are bad. I've worked on a small Onkyo as well featuring one of those. As you say they're expensive and not great. Thanks for watching!

[@SujithCupid-wc4sv]

Bro I have Yamaha reciver ..the problem is internal error .

[@mohanawale]

How to connect TV Sound to htr 6230 yamaha receiver TV Sound is not coming from receiver

[@tony359]

I'm not familiar with the 6230 and I don't know what TV you have, I'm afraid I cannot do much from here! Make sure you use the "ARC" HDMI ports - ONLY those ports will send sound back to the receiver - assuming BOTH your TV and your receiver support that. If not, you'll have to use an optical cable, again assuming your TV has an optical port. Good luck!

[@izzzzzz6]

I can't believe the amount of things that go wrong with these Yamaha and Onkyo amps.

[@tony359]

yes - some could be prevented by better design I think :)

[@izzzzzz6]

@@tony359 I hacked an older Yamaha receiver RX-V630RDS that was doing this but now i'm thinking it might be the super cap for the processor memory, but to get around it i took i think a 4.8V line from the processor vcc and ran it back to PRY. This bypassed the lack of PRY i just advised owner not to leave it plugged in. It was working after fixing a 5v reg. until i dismantled the front in order to clean the volume encoder. After replacing the front panel it no longer had it's PRY. I am now fitting a phono stage for him. About to tackle it now. With the ones with the power amplifier modules they can have different numbers because one can have more channel outputs than the other for central and surround etc. I have also encountered issues with DAC chips in the range that you have there or the ones that use the PCM1681

[@rafaelcasanas6677]

Great

[@LearnTricks1312]

I got 10000uF 63v in market can i install it

[@tony359]

I do not know what the one you are replacing is rated for. The capacitance must be the same, the voltage can be higher but NOT lower.

[@LearnTricks1312]

Ok thank you And I'm changing 10000uf 16v capacitor to 10000uf 63v But its size of diameter is large

[@tony359]

@@LearnTricks1312 16V with 63V is fine. Ideally you want a 105 degrees one and low ESR. A larger capacitor sometimes fits anyways - or may fit with some tinkering. Otherwise you'll have to find a different one.

[@LearnTricks1312]

Ok thank you for your information 😃

[@maovi7652]

You're a master. I wish to have that knowledge for diagnostic my receiver. Maybe you have any ideas why on Audio channel source it has loud noise like pink noise, but on HDMI source working fine? Please see my video about Yamaha RX-V475. Thank you

[@tony359]

Thank you! I am no expert but I took a look at the schematics, the block diagram. If HDMI works it means that that route is ok. The difference with the analogue sources is IC 61 which is the ADC (Analogue to Digital Converter). HDMI also goes through there but HDMI is digital already so that section is not used. It looks like the ADC section of IC61 might be malfunctioning. I see this receiver has a very extensive self test and diagnostic menu, take a look at the service manual (available online) and experiment! Good luck!

[@maovi7652]

@@tony359 Thank you for your answer. I really appreciate :)

[@maovi7652]

@@tony359 I took apart receiver and multimeter continuity test showed 1560 between audio signal input and ground connection. Is it normal or it shouldn't show anything? If I good understand signal touching ground? Thank you in advance for any help :)

[@tony359]

1560 doesn't seem bad - whether that's intentional or not, I do not know. An input issue wouldn't sound as pink noise. Pink noise is likely digital data. If your input was in a ground loop you'd hear buzzing noise I think.

[@maovi7652]

@@tony359 kzbin.infoX8TXN3KxoGE?si=hzDIEh0fXQBTrrfz This is what I hear though this channel. I surrender. HDMI working fine so I'm not sure what to do and better will be don't perform any other damages ;)

[@user-jr9rl7eb8j]

❤❤❤🎉

[@souroumohamed3448]

❤❤❤❤❤👍👍👍👍👍

[@markfrost2707]

there was nothing wrong with it in the first place. These things are notorious for being throw away as the owner thinks theyre fried. I just got one for 20 bucks at Goodwill in perfect, brand new condition. Took me two days to get it to play......like I said--there was nothing wrong with it in the first place

[@tedvicarri6153]

Nothing happened, I definitely heard audio…

[@user-wp4lz9hs3y]

Даже вытереть руки от пасты не хватает ума! Ужас!

[@menotyou8369]

If you have any electronics that you care about, that has Jamicon capacitors, replace them all, they are garbage.

[@andrewlittleboy8532]

Musical Fidelity use Jamicon and they always need replacing after a short time, they’re rubbish.

[@williamwong5627]

In the very first instance, that pretty capacitor should be replaced before wasting all your time doing the diagnosis.

[@tony359]

Of course but the purpose of this task is to learn. Has I replaced that capacitor straight away, the video would have been 5 minutes and boring 🙂 If you repair things for a living of course you immediately replace that cap 🙂 thanks for watching

[@sammyrothrock6981]

Microprocessors work better with zero ripple definitely bad cap

[@tony359]

it does, doesn't it? :) Thanks for watching!