Yamaha DSP-AX620 volume control repair
HTML-код
- Опубликовано: 8 сен 2024
- Yamaha's DSP-series amplifiers tend to suffer with dodgy volume controls after a few years of use. A lot of the time, people either throw them out or list them on eBay for pocket change.
As the repair's so easy to do, I figured it was worth doing a quick vid of how to do it in case you come across one of these. They make really superb second-room hi-fi or home theatre amps, even if they lack newer features such as HDMI. I use a couple of them just as plain stereo amps as they're a hell of a lot better than your average amplified PC speakers ;-)
Remember, always unplug the appliance from the wall before working on it or removing the cover. If you've never done this before, I'd seek the help of a qualified electrical engineer to guide you through your first repair. If in doubt, get someone qualified to do it!
Also, if you screw up your amp, don't blame me! This repair is undertaken entirely at your own risk! (I do so wish I didn't have to say that, but some numbskull will think it's my fault they toasted either themselves or their amp :-/)
I just did this on an old RX-530 that has been collecting dust on the shelf for about 4 yrs. It was actually simpler on the model I have. Thanks for posting this. I never got rid of that receiver thinking it had to be something simple and then I came across this video. Worked like a charm!
Bought my receiver at Goodwill for $40 with no remote. When the volume knob didn't work I was very disappointed. Thanks to RUclips and your video, it's working perfectly and I got a steal of a deal. Thanks!!!
I really appreciate the extra effort of the clear magnified view you recorded. That is tricky and rarely done on youtube. Great job!
+Ken P you're most welcome - hope it helped :-)
I just had to rewrite my comment because a lot has happened since I posted my question. I found a killer amp at a great price and really wanted to give the component world of home audio a second chance. So, after getting my extremely high-end Yamaha find from a 2nd-hand shop, I get it home to find this problem we have here. I almost busted some very expensive speakers while testing.
After watching the video, I got super excited and I found some "CRC Electronic Cleaner" at my local hardware store for $9.99. My model was different and for second there I thought I was lucky and they added a way to access the control from the front. Nope. You have to do it just like in the video. For me, I had to pull only 1 ribbon cable and had some extra lock-nuts to remove from the front cover but the process is exactly the same. It took me about 1.5 hours to complete because I decided while in Rome, I would clean other parts inside the unit. After fully assembling, connecting front A/B and Center channel, powering up and adjusting the volume control up and down.
It was a beautiful moment that can never be replicated.
Thank you for adding meaningful youtube content, I really learned something today
I've had a Yamaha RX -V630RDS for about 10 years.The volume control problem has been bugging me for the last 7-8 years.Although the receiver is different the procedure is similar.Took me a couple of hours but well worth doing.
Excellent video !! Thanks Harry.
One of the best dissasembly vids I have seen on YT, thank you
NGL for 11 years ago the camera work is ahead of its time! looks like something that would come out like 2022 or 2023
Thank you for a very good video.
This is also a great opportunity to replace the memory backup capacitor. It's the silver and black component behind the VFD in the top left corner @2:43. It is a supercapacitor with a component value of 0.047F/5.5v
Thank you so much, I just followed your method to repair my Yamaha RX-V620RDS. Now works perfectly.
Brilliant Harry my old dsp-ax620 volume control has been bugging me for years. Didn't even have to strip it down. Just pulled the knob off and to the left of the spindle there's a gap(next to white block). Gave it a good squirt of Deoxit D5 and after a few rotations couldn't believe my ears and eyes. Obviously the D5 got in there and worked. Perfect. Many thanks Regards John.
On my pioneer this has been going on since I got it cheap secondhand. I didn't even have to disassemble, just took the top cover off. I got WD40 and sprayed behind where the volume knob is between the board. It took a few tries while spinning the knob and it works like new!
Just fixed a Yamaha HTR 5550 someone had left in their free pile with this, now it works great, so thanks! It didn't come with its remote, so I didn't have that option.
I have a Yamaha RX-V730 and the manual volume control hasn’t worked in years, remote control only. Having viewed several videos about using Deoxit, and then twisting the failed “knob” repeatedly, and viewing this video, I had a hunch. This video stated there is grease in the volume control assembly. Since the volume control hasn’t worked in years, I powered up the 730 with NO audio input, and started twisting the volume control rapidly left and right. Soon, i started to see flickers of “Volume” in the 730 display. The flickers of life were sporadic and jumpy. Continuing, I kept twisting the volume knob for several minutes. The control was becoming more consistent. Kept twisting the snot out of that control. Now, I have a consistent and reliable manual volume adjustment. Time will tell if this was a solution.
Thanks for this quick and dirty hack - tried to spin my volume control on powered off rx-v671 for a minute or so to both sides - powered it back on and presto - works like new :D it probably simply helps to heat that oil a little bit and distributes it evenly due to centrifugal force - thats all there is to it :)
Just did that right before finding this comment.. YEEE!
Just saved me trying to figure out when I was gonna have the free time to take the whole damn thing apart. Mega-spinning it for about 90 seconds with the power off and the knob works again. Good enough for me!
@@djportal Awesome. That worked and saved me hassle! 🙏🏻
Thanks! Just fixed a Yamaha RX-V620 I picked up off the street with a broken power button, dodgy volume control and torn power cable with the help of your video.
A sincere thanks to you for posting this process. I have a different model, but it was 90% similar to yours. With some minor modifications in the steps, I now have a functioning volume control; no more needing to seek out the remote. Thanks again!
Your video saved my Yamaha RX-V630 from trash. It was easier to get to the knob in my YM. Thank you for that!
Harry thank you very much. I had this problem for many years and i was thinking of buying another one. But after following your perfect video the volume control works again as if it was new.
Found this upload whilst investigating solutions to this model. I can say follow the video carefully and it will solve this problem. Thanks Harry, you saved me 2 hours or extra fiddling about.
Now I am off to fix the centre channel amp which I suspect transistor death or dry joint therein.
P.S I got my amp from freecycle.
Thank you so much for this video!
I used it as an inspiration and a tutorial for repairing my JVC RX-7000R with the exact problem. It now works again - and I'm even a total newbie in electronics.
Thank you so much for this write up! It took about an hour and the failure which annoyed me since years is now finally fixed!
Great, after 3 years HTR4066 volume works again. thank you!!!
Thank you! My mother had one of these years ago, and it has the same problem. I have just set it up today and it's working like a charm. When I get the time I'll have a go at doing this myself.
Thank you Harry,
Just what I needed, I have the same unit and same difficulty, seems a common problem.
I'll get on this right away, I have been just using the remote since 3 months after I bought it. but I have been on an electronics fixing spree this last month so now this one can be done. Thanks again.
Maxtcc
We haev this problem on my Mum's Sony MHC-w55 Mini System. It's old and not very hifi but does the job for her.
I've yet to try this fix as I don't have any tools here but I had to say a big thanks for such a well put together video. You've got talent and it's much appreciated :)
Thanks for the good tutorial. Had the same issue on my Yamaha V361. On mine the array was soldered onto the board but other than that the disassembly was very similar.
Works perfectly again now! :)
just did that, it solved the volume problem on my Yamaha DSP-AX620 -- thanks for that! ;) -- but now the "set menu" only displays point 9 and 10, all the others are gone. this amp is a mess! :D
Excellent. Much prefer seeing how to repair something rather than reading a repair manual. I've had this exact same amplifier for over 10 years. I may get around to repairing mine at some point, but being so bulky and heavy, I use it as the bottom of my entertainment stack with 4 devices on top and a jungle of cables behind it all. Admitedly I very rarely used the volume control directly, as its a bit out of reach.
Thanks for this! Had the same problem with my Yamaha Htr-5500. Worked like a charm.
Thank you so much for this video! It help me saved my Yamaha RX-V620! Now i have a perfectly working receiver!
Hey Harry!
Thank you very much! This helped me reparing my Yamaha. Now it works like a charm again ;-)
Thanks a lot!
Thank you, I just fixed my CRX-320 based on this video
Harry - thank you. The process worked perfectly.
Did the same for a pioneer vsx-515. Volume knob itself is a bit different and had to desolder it to open it up but it's the same principal :)
Ah very good, I have to do this repair on one of my Yamaha amps.
Hey, this video helped me a lot and my amp is back in working condition thanks to you!
Thank you! You saved my Panasonic surround system!
Just want to say, thanks for the video. I had the same problem and it helped me out a lot. It was right on point and detailed. Thanks
Muchas Gracias, tengo un SA DX 750 de Technics, tenia el mismo problema, lo abrí y limpie el potenciometro como en el video, lo rearme y todo OK, muchas gracias por vuestra guía. desde Chile.
This is friggin awesome! Need to try that in my Yamaha RX-V...
Great video. What type of solvent did you use to clean it off? Would you recommend a DeoxIt product to re-lubricate the contacts? Thanks!
Thanks Harry; this worked perfectly!
worked for me on an RX-V730 RDS! Thank you so much!
Thanks for really helpful tutorial, just saved £10 for new volume control
Wow so cool thanks i have the same amp. shipped it over with me to Borneo. Now the pots got delay when need to turn down and can't find the remote in time., So when push come to shove, i will have a go at this, Thank again.
man this is a mint vid....I've got the same problem with my Sony hifi...I won't buy a new hifi cuz mine sounds better than today's trash
problem is I don't know where to start to take it apart as I'm not familiar with the inside of the model
What do you use to regrease the inside, that spray? What about di-electric grease?
OK so I scrounged up some bits and pieces and managed to perform this fix on the above mentioned Sony mini system. So anyone out there with this problem, it's very easy to do.
Bags for screws is a good idea, wish I'd done it... Oh well, it works!
The volume knob on my Sony HCD-CP1 stereo wasn't working. Turning the knob didn't work. It raised/lowered by equal amounts and overall sat in place. Sometimes when I tried to raise the volume it instead went and lowered the volume! I didn't have any cleaning solution or anything. So I tried simply cleaning the contact area with a household paper towel from the kitchen. Surprisingly it worked. The volume knob now behaves as it should. I hope this won't cause any problems long term?
The CD reader was also having trouble reading discs, so I wiped the lens with one of those wet wipes intended for cleaning glasses.
For the first time in years the stereo works.
Now I only have to figure out how to fix the remote control. I tried disassembling and cleaning it, but button function is still erratic. Sometimes it works, sometimes it doesn't. I don't know why.
Using an eraser (the kind used to remove writing from paper) to clean the remote works.
Alrighty...hard luck....will give it a shot anyway.....thanks buddy...good effort for the video...thanks once again.
volume problem on yamaha rx-v 471 ... volume level is fixed but there is no sound when i stop turning the knob. what do i do
Hi Harry I followed the instruction. Clean the knob inside and put it back. The unit is now switching on for few seconds then switch off. Please let know if I am doing anything wrong. Thx
Wow, really excellent repair video. Thank you.😂
Another RX-v630 Saved! Thanks
Thank you very much!
RX -V630 saved here also...only thingbis that I did not have new lubricant to put...
What type of grease should we use? If it used to have grease it needs to be replaced right?
Thanks, this video really helped.
My jog wheel doesn't work if I turn it too quickly -- any advice? I can't find any detail on how it should look; I think I may have bent the wire connectors when cleaning it.
Great video! what kind of solvent did you use?
I have a question. I have the same problem and thanks to your wonderfully instructive video i'll be able to repair the knob on my reciever. However, I was wondering if i can use the " 3 in 1 Multi Purpose Oil " to lubricate those pieces to where the knob connects. William
Not sure on that one to be honest... 3-in-1 isn't generally used for electrical connectors and I'm not sure how stable it is over time. I guess the worst that could happen is that it gunges up again and you have to re-clean the shaft encoder, or that it's too good an insulator and it doesn't work properly and you have to take it apart and clean it again. I can only recommend the switch cleaning lubricant as that worked for me, but your mileage may vary. On your own head be it :-)
4:36 WTF? :D Great video at all. THX!
Hopefully this helps me fix my Sony STR-DG600. Knob is missing and I think the shaft is snapped but it still works
thank you very much Harry , topjob !
Hi.
Just took your good advice and prised apart the volume control on my Sony TA-AV561 receiver. It took about 10 minutes to do the job, BUT I have spent the last 3 HOURS trying to get the receiver going again....Unsuccessfully ;-(.
The Standby light and the LCD screen will not power up.
All the lights on the control panel do work however ??
I connected the speakers to check, but no sound.
I am no electronics guy, but I suspect the 20 pin ribbon cable controls the LCD screen.
I have disconnected and reversed the ribbon, but to no avail.
BUT, I did notice when the ribbon was disconnected that 3 additional lights (CENTER, REAR, WOOFER) on the control panel started glowing!
When I turned the volume control up, the 3 lights glowed brighter, then dimmed as I turned the volume back down.
When I reconnected the ribbon the 3 lights went out and turning the volume control had no effect.
I took apart the volume control again, left it apart and tried powering up the unit.
No difference whatsoever. I reassembled the volume control. but the receiver will still not power up.
Has the volume control got a short in it now, perhaps?
Can anyone HELP me, please :-)
norincobro Problem solved. It was a fuse!
Volume works perfectly.
Thanks Harry :-)
A pleasure - and don't confuse talent with enthusiasm ;-)
3 thinks, never remove the lubricant between shaft and case, it need to be dumper grease (if you remove apply new dumper grace). second, never spray on pcb or any parts (spray on cleaning tools), third, after cleaning apply new special grease (not bumper grease) on contacts. your method is leading to totally damage encoder and contacts.
its like removing old oil from engine, cleaning and running without new oil.
I don't doubt that if it was under the same stresses as an engine removing the grease would be catastrophic. Thankfully, it's only under the stresses of a volume control and has so far lasted about ten years without any further maintenance😂 Having wilfully dumped various solvents directly on to PCBs and other assemblies over the years with no ill effects, I'm going to continue to do so. I think you're mistaking a £10 piece of ebay salvage for something that deserves care and attention paying to it!
@@disgruntledgoat this is unprofessional repair, and it should never teach people to do very bad job. learn about it before arguing. yes, you can do wherever you want but don’t learn bad practice people. therefore, so many failures we have around the world as uneducated people are trying to be smart. second, if that would not be necessary so the companies and factories would do the same lie you but 100% of production and educated engineers don’t do what you did.
@@Johny666EU I think you need to relax a little there, chap! You seem to be extremely angry about how I successfully fixed a ten-quid amp's volume control using random stuff I had lying around 😂
I completely agree with your assertion that there are better ways of doing this particular repair, however I consider them overkill and excessive in this instance.
My uni tutor told me more than once: "'Perfection' is the enemy of 'good enough'". Does that mean you should do a sloppy or insufficient job? Absolutely not, but it does mean you shouldn't spend time and effort on something that doesn't warrant time and effort being spent on it, namely cleaning the crap from a volume control on a £10 amp 😁
The repair was effective, proportionate and has lasted longer than the original volume control did before malfunctioning, and therefore I suggest that both the method is reasonable and result is satisfactory in this instance.
A* great help but i had problems with 2 wires black/blackgreen connected to main power supply these were too short to allow front panel access.
I ended up breaking them as they looked like they could be unplugged but it wasnt a plug they broke off board .
I had to resolder them.OOOOPS
Great vid. Thanks for taking the time to post this. I had a similar issue with a Harman/Kardon AVR 80 II, plagued me for years. I gently opened the case and sprayed the volume control module with WD-40 and dried it up with a cloth. It actually worked like a charm but it's only been a few days of perfect operation so far. Time will be the true test. Would you not recommend such work as I did for longevity? Thanks.
WD-40 has a lot of solvent.. Like 60%. Not good for electronics.
@@sammyjenkis4791 , the solvents in standard WD40 aren't the main problem; the residues left behind are the problem. It is a water displacement formula and not designed for cleaning electronic switches or controls. The same company now makes a range of products that they claim are for electronics use, but I have not tried them.
Can anyone confirm this fix will work even if the remote control does not adjust the volume?
Thank you Harry.
Thanks Harry..
Mine is harma kardon and display the same issues.
I removed everything as per your instruction until the control knob and realised it has a different attachment method to yamaha.
It kinda like solder into the PCB and no way to remove it without breaking part of the soldering apart...
So i am stuck....any advice Harry?
Thanks - I did all this, but in testing before full reassembly, I have to push on the volume knob to create better contact and make it work right. I have the volume assembly back together as tight as it will go. All the cleaning also removed all the factory grease and the knob moves a lot more freely with some friction. Ideas on either of these?
Wiping the "fingers" of the control with a paper towel as shown here probably bent them downwards slightly, even if by only a few thousands of an inch (this was kind of a brute force technique and I don't recommend it). You can probably hook those contacts with a dental pic or jewelers screwdriver and bend them upwards slightly. *Very very slightly*. If you have a set of cheap digital calipers with a depth measurement option you can measure the height of the "fingers" first as a reference and then bend them up just a couple thousands.
The best way to clean the pie-plate disc and contact fingers is to gently polish them with a pencil eraser after degreasing them. Use a light touch and don't leave bits of rubber behind.
As for the control not feeling the same afterwards after you cleaned it, the original silicone lubricant has a viscous consistency imilar to honey. It really wasn't necessary to remove the grease from the shaft and bushing, but if you don't have a similar honey-like silicone lubricant easily available, clear transistor-heatsink grease, or Teflon "Super-Lube", will work. Grease the shaft and bushing, and put a thin, very light coat of the lube on the pieplate disc. It won't feel quite the same as the original lubricant but it will feel a lot better than your currently unlubricated control.
Excelllent video, thank you.
I own the same amp and had the exact same issue.
One other thing, maybe you can help me with that, too.
The display has over the years become very dark, with daylight you can't almost tell if it is turned on, i tried all settings but it's just very dim and dark.... any clue what might do the trick there, too?
Just this morning my Yamaha receiver greeted me with blasting sound levels and I had to monkey with the volume control to calm it down. Never happened before. But I think it likely is a dusty, dirty volume control as the receiver does collect a lot of dust since it is not in an enclosed cabinet.
Mine is a RX-V730 which has a motorized volume control.
Do you imagine it is a similar design to the one in your video (I couldn't tell if yours is motorized but guess it is)? Help? Thanks.
Where did you get the awesome music from? BTW, I have this amp and have just started watching this video. I have the same problem, but I use the remote so it's not a biggie for me.
thanks, great video. I'll try this as soon as I can on my sony stereo which has exactly that kind of volume control problem.
Do you think that removing the grease and applying a lubricant spray is a lasting solution, or will the encoder have to be recleaned again sometime in the future? Also do you think WD40 is an appropriate lubricant?
The best thing in the video is how you unwrite the plastic bag at the end ;-)
Standard WD-40 (WD stands for water displacement!) is *never* appropriate for cleaning electronics switches, controls or potentiometers. NEVER. The company does now make a range of cleaning products that they claim to be specifically designed for electronics use, but I haven't tried them and can't offer an opinion.
What solvent did you use?
If I push on one of the sides on the knob mine would work like new.
how about using silicon grease on contact disk and on shaft too.? (Kinda silicone which is used in scuba diving geara)
On the shaft, no problem (and it would probably damp the rotation nicely) but on the disk? It's a bit goopy and the finger/prong things may just ride on the goop rather than making an electrical contact... I'd stick with switch cleaner-lubricant, TBH...
Strangely enough, I had to take a look at an HK amp a couple of months ago and it was a right royal pain in the so-and-so to sort... I eventually resorted to removing the whole assembly from the PCB (desolder with a solder sucker and plenty of good solder wick) and then take the thing apart from there. I seem to remember it had a stacked arrangement (a couple of sensors with a motor behind that) and so the whole thing had to come off and be taken apart for cleaning. Not an easy fix, I'm afraid!
thank you very much.very helpfull
very helpful, thanks a lot.
And no new grease?
I think he forgot that part. Also you could probably get the same results by simply spraying some contact cleaner in through the front panel/knob & potentially save yourself from having to disassemble the whole unit
The stuff I sprayed on was contact-cleaning lubricant. The grease seemed to be part of the problem in that it was getting wedged under the fingers of the encoder and causing a bad contact, so none went back in. Ten years on and it's still working fine, and that's longer than from the time it was bought until the control started to go dodgy, so I consider it the correct decision :-)
No need to regrease, after you cleaned it?
Depends on how "damped" you want it to feel. I just wanted it to work, but as the grease seems to thicken up over time I didn't bother.
hi, i have a rx v620 with the same problem, if i make this, my problem is solved?
I have RX-V630, and problem solved.
Tried that failed. anyone know where to get replacement parts?
+Mike Tickal YAMAHA's website
One of our customers has used one of our damping grease products to correct the tactile feel and operation of their Yamaha DSP volume control knob and kindly sent some pictures and an explanation - support.newgatesimms.com/yamaha-amplifier-case-study-potentiometer-damping-grease/
so does that part need grease at all?
Not sure. I think it was originally added by the manufacturer to give it that nice damped feeling when you spin it. I did one without the grease and the control spun way more freely than the original. Add grease to taste, I guess, or limit it to around where the encoder shaft passes through the upper casing to regain at least a bit of the "premium" damped feeling of the original.
Great video! What is the music??
found it! "Photoreal" by Sam Gorski
Great job,,but I just use the remote control volume,, works great.
Good video!!
Thank you!
Excellent - happy this helped :-)
or just use the remote. 'fixed' my RX-V1 by turning it off and rotating the knob a dozen times or so. I figure it was dust. I always use the remote anyways.
Yamaha parts were cheap back then when I replaced my volume pot. Now, as of 12/19, they can't be had!
Hi, I've got this problem on a RX-V800. I looked up the component too - almost certainly this:
uk.rs-online.com/web/p/mechanical-rotary-encoders/2651723/
Brand Alps Mfr. Part No.EC16B2410408
Will get it to bits one evening this week and clean it up. Great run though on the video. Regards
The beautiful background music suggest you are a pro video maker and know fuck all about the topic at hand.
Didn't show the result, after repaired.
nice
Can we use kerosene or petrol