Monitor Audio RSW12 Repair. Finding Bad Capacitors With A Volt Meter

[@daveholmes8991]

Thanks for posting this video. Got one of these subs for free via neighborhood curbside trash pickup and was able to fix it, hardest part was lifting it and putting it in the truck. also, the trick for removing the nut holding in the toroidal transformer is nail polish remover. turns that black stuff into butter.

[@jacks1030]

This was the EXACT same problem..with this RSW-12..I had for repair. All 3 220/25V were quite bad. replaced sounds GREAT now THANKS !!

[@YodaYeo]

Can't thank you enough. I just needed to replace the 3x 330uf 25V caps (220uf in your amp), works a treat now. Many thanks

[@charliejeffriesdrums]

Great video! I had exactly the same problem with my RSW12. After replacing the 220μf 25v and the 100μf 16v capacitors, the sub works perfectly!

[@norcal715]

Awesome

[@brancarr1]

Love your videos Norcal! Keep em coming.

[@saarike]

Nice work. It was a pleasure to watch.

[@AsifAli-pq2eq]

Sir always your videos very usefull thanks for sharing information

[@mortenrolsing7137]

Nice to se you back :-) love your videos, thanks

[@constanciopatindol4947]

Thank you. I got a problem of my Jbl Eon 518s. It powers on and recieves a signal and tru to parallell speakers connected. It just produce a sound on woofer.

[@beltern]

Hey There.. we have the same problem for subwoofer an d really i just dont know why my sub humming more than what you have.. till then i found out the issue with your help.. about this video.. and it really great.. i may be follow the same trouble shooting what you have done.. so to fix my subwoofer.. and make my sub good enough to hear..

[@drabara]

Something wrong with the audio in this video ... Never the less i'm watching !

[@dirkgeens62]

Thank you, I have the same model with the same problem. when I have the time I'll fix it and enjoy the sound again !

[@bluesalamander8351]

Thank you. excellent presentation!

[@baotran6789]

Hi there, Thank you for your video . I have one of the Monitor Audio RSW 12 exactly the same model as you have and the problem was in the first time was very low humming and after for awhile it was no sound at all even the green light ( back side ) was not turned on when it get a signal , I was taking it out and checked all the Capacitor then I see two of the main capacitor ( 4700uf ) was bad sign ( swollen ) I did change both of them but the problem was the same . So I dont know what is the next step to check on it ,please help me out . Thank you , BT

[@norcal715]

Check the latest repair on another RSW12, all(most) SMD caps were bad kzbin.info/www/bejne/emfHq2p5jNOXj6s kzbin.info/www/bejne/kGXFp56Mn9WArNk

[@Yue117]

Isn't there precautions to have while manipulating material with those big capacitors ?

[@norcal715]

just make sure they are discharged first.

[@drulli1]

Excellent you are videos again!

[@baotran6789]

Please , show me how to open the back panel and woofer . I unscrew all of the screws in the back but it was so tight to pull it out . Thanks

[@norcal715]

it may have some type of glue to provide an air tight seal, you may have to pry it open.

[@maktsor2715]

Love your videos.Thanks

[@nipper0012]

IF you still have the sub please look at the glue when it turns dark it becomes conductive. you may want to flake it off. Also would make a great video showing that it acts as a resister.

[@TheHarpanOnly]

I really enjoying this video!!! GREAT video, and thank you for giving clear explanation...

[@QuantumBubble]

Awesome troubleshooting, thanks!

[@strelok8686]

Hello. In the same subwoofer in construction. There is a difficulty in construction. Burn out the part of the fee in the relay dynamic. You can take pictures of payment from both sides in the field of choking. See you in the video is just part of the payment.

[@albertszabo5289]

Hello! I have this sub as well, my problem is that sometimes it makes a cracking noise even without audio source and when it goes in standby it makes a violent boom noise. Any idea what could be the issue?

[@redcatimaging]

Nice video with good troubleshooting :). Expected a bad cap from the beginning on, but near the regulator was a surprise :). The MK-168 is a chinese knock off from the famous AVR Transistortester. It's a very nice device :D, had one build myself many years ago from the original schematics.

[@robertkrysik100]

Hello I had problem with my PLW-15 do you have maybe access to Monitor Audio Repair of this model ? I called the service in Poland and said that only option is replacing the whole amplifier is just sick for me. Let me know please. Thak you

[@norcal715]

I do not have access to any of their service manuals. They are a very closed company when it comes to service information. Sorry

[@Михаил-с4с4е]

Подскажите пожалуйста какой стабилитрон установлен ZD10?

[@sergelavallee913]

Good day sir, i have a sub here Monitor audio Silver RXW-12. The problem with it is: The red light goes from green to red without stopping and sometimes stays on red , sometimes not. Where should i check in it and how do you take off the black hard glue without braking the circuit. Waiting for answer. I'm counting on you because i'm stuck. By the way. im a certified tech but i'm still learning. Thank you! waiting for answer. Best regards. Serge.

[@Speakertweaker-tp4em]

Do you now what makes a subwoofer amp only push DC current instead of AC current cause my amp is doing that

[@norcal715]

sounds like a shorted output ic/transistor

[@bwebcorp]

I really enjoyed the video and I too have a Monitor Audio RSW12 with the exact same issue as you fixed. Wondering where you sourced the capacitors from and what type did you buy? Thanks for any help you can provide.

[@Bigoak66]

How much would a repair like this cost?

[@norcal715]

US dollars $60 to $100 depending on how much needs to be done

[@CarsandCats]

When it comes to capacitors: When they are small, change them all. Cheap enough and easy to do.

[@edithboozy1000]

Toroids in subwoofers are pretty rare these days no? Class a/b?

[@norcal715]

Yes, this one has a class D digital amplifier, so there is a lot of noise.

[@edithboozy1000]

@@norcal715 Wait so it has a toroid and a class d? Even more rare right?

[@constanciopatindol4947]

Is this the output part of the amp?

[@norcal715]

no, it is the low voltage + and - power supply

[@baotran5863]

Hi dear friend, Please , show me how to open the back panel of the sub . I unscrews all of them but I could not pull it out .It's so tight and no way to open it ! Any suggestion highly appreciated . Thanks in advance . Best Regards, BT

[@norcal715]

it may have some type of glue to provide an air tight seal, you may have to pry it open.

[@anstadt1]

Which capacitors do I need if I swap all three?

[@gagegr]

www.badcaps.net/forum/showthread.php?t=50194

[@Sloxx701]

Nice to see you making some new videos. That board looks like it has that nasty conductive brown glue all over it, no?

[@UFOHunting]

Love your videos, but what's up with the video sound quality, there is a continuous hiss.

[@Conservator.]

A Class D amplifier is not digital but transforms the input to a PWM signal with is then amplified (by fast switching mosfets). After that the high frequencies are filtered out by inductors and capacitors. Just my two cents. Great explanation of the analysis and repair. Tx!

[@19mati67]

Nice video. It would be nice, if you could show one that blows fuses.

[@baotran6789]

Thank you so much ! I got it .

[@kuba8604]

I have constant hiss from my JBL 305mkII speakers. Hiss stays there even if they are plugged only into wall, there is also not problem with electricity. There must be problem inside the speaker, do you think there is way how to repair it ? If anybody can help i will be be verry happy.

[@norcal715]

Check the capacitors if you have the ability. Thanks for watching!

[@kuba8604]

@@norcal715 Thanks a lot for answer,this hiss is normal in all JBL monitors. but hiss is lo longer problem, i changed my room setup and its ok. But after my 2 year warranty i will go to local hifi repairer and i will tel him that maybe its capacitors.

[@sotiristsagariolos4427]

Another excellent video!!! But unfortunately you have not uploaded new video for us!

[@dilshad1756]

waiting for more videos..

[@ahmeddahmani2662]

tu nous a manquer prof 7 mois d abssence cest trop notre prof prions dieu que tu est en bonne santee et que tu es encore sur terre reponse obligatoire pour que je reste a votre attente bien sur avec tes ewatras vedeo qui nous me pousse en avant ton ami de morroco

[@saarike]

Just wonderfull!

[@yanostropicalparadise755]

on almost all electronic its usually a capacitor failed at fault

[@tonict2302]

More videos like this please...

[@cjdelphi]

one time i was hung over really hung over and my amp died the same day (reason for getting so drunk) anyway while extremely hung over i dragged myself to the amp i somehow disassembled when drunk... reading voltages hurt, so i grabbed a 100uf 20v capacitor, attached one side to ground, then i attached the red probe to the positive... then i simply touched the positive to the positive side of each capacitor and listened for the hum as i touched each cap... viola, 30 seconds later i discovered 3 dodgy caps (as you touch the bad cap, it reduces/stops the hum)

[@gagegr]

Any chance you could give more detail or tutorial here?

[@galliontrillion]

wicked vid x

[@yanostropicalparadise755]

capacitors have such a short life, the average is 1000 hours I look for high end ones that rate 5000 or more hours. if you leave the sub on all the time as I do they don't last.

[@Conservator.]

Yanuario Arias Hi Yes, I too only buy reputable brands and look specifically for low ESR and longer lifetimes. I expect those caps to last a lot (really a lot) linger than the cheap Chinese caps that are surprisingly enough put in even high end systems. That said, sometimes (often) the design of the circuit is just not suitable for a standby mode. Especially because this amp is a class D anyway, a very efficient SMPS would have been much more suitable for the low voltage pre-amp than the regulators and resistors that dissipate any access energy and warm up everything around them. Even better would have been if the transformer would have had two extra leads with lower voltage for this part of the circuit so there wouldn’t be that much to dissipate in the first place. Maybe this sub does have those extra leads. I’ve repaired several KEF en Harman Kardon sub amps that just have output 3 leads from the transformer. They have 50-80V outputs that have to be brought down to 15V and it’s done by dissipation. Just opened a ‘newer’ (8 years old) KEF. Still the same board but they move the dissipating resistors to the heat sink. So the recognised the issue and patched but didn’t really solve it. They also still used a lot of ‘Licon’ and ‘Samcon’ capacitors. Such a pity.

[@MowiWowi]

we get it u kno what ur doing and im obviously a bit jealous

[@ЮляНикитова-е9в]

He has a transformer for 200 watts, where is there 500 watts???

[@jpluera]

Wierd hiss in your mic maybe...but good upload anyways.

[@khalilafridi267]

weldone

[@electronicartis]

hi Norcal you stop upload you video.

[@norcal715]

More to come soon

[@norcal715]

I have many more videos up now. Thanks for watching!

[@BendyLemmy]

Lolz a lot more than just a volt meter in this video. Shame, I only have a voltmeter and a limited budget - just fixing at home and so I guess best just blindly replacing electrolytics is the way to go.