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Post by peterp on Sept 28, 2019 15:26:14 GMT -5
I sent mine into Emotiva back in Aug of 2014 for this issue, and it's been working great since ... then just today, the problem returned (5 years, 6 weeks later). I'm hoping they'll replace the power supply PCB under the 5 year warranty, but we'll see. I opened it up and took a look at the PCB. Capacitors C12 and C18 are bulging on the tops. C19 and C7 both look normal ... I suppose if Emotiva can't replace the part under warranty, I should just replace C7, C12, C18 and C19? Anyone know the value for C12? Normally it's just C18 and C19 according to most posts and my own experience. Neither C18 or C19 on mine were bulging, but replacing both fixed it. My meter doesn't read capacitors that large, so I couldn't tell whether one or both was/were bad. That said, any bulging electrolytic capacitor should be replaced. Can't help with the capacitor spec for C12, but maybe Emotiva support will tell you if you call them. To Emotiva's credit, they seem to be willing to share information on how to fix it yourself. |
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Post by stoopalini on Sept 28, 2019 17:30:07 GMT -5
The “value” of a working c12 is extraordinary!😁 The cost of it and to replace it is another story! 😋 Ha! Maybe I should have said "Anyone know the specifications of the capacitor labeled C12?" C7 47μF 25v 105°c C18 330μF 16v 105°c C19 1000μF 16v 105°c C12 ??μF ??v Normally it's just C18 and C19 according to most posts and my own experience. Neither C18 or C19 on mine were bulging, but replacing both fixed it. My meter doesn't read capacitors that large, so I couldn't tell whether one or both was/were bad. That said, any bulging electrolytic capacitor should be replaced. Can't help with the capacitor spec for C12, but maybe Emotiva support will tell you if you call them. To Emotiva's credit, they seem to be willing to share information on how to fix it yourself. Right, definitely worth replacing both bulging caps, and might as well replace 7 and 19 as well. I did send an email to support, and tried calling ... although they're not open on the weekends. I'll give them a shout on Monday. |
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Post by jimprofit on Jan 7, 2020 16:57:24 GMT -5
Ha! Maybe I should have said "Anyone know the specifications of the capacitor labeled C12?" C7 47μF 25v 105°c C18 330μF 16v 105°c C19 1000μF 16v 105°c C12 ??μF ??v On my unit C12 was 100μF 50v 105°c Replaced it (the nearest I found in my local shop was 64v) and C18 and C19 with the above specs and it works fine since.. |
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Post by simonldt on Feb 23, 2023 16:29:41 GMT -5
Hey all, I've been having the same problem with my UMC-200 (same symptoms) and after emailing support theye recommend replacing the 3 caps C7, C18 and C19.
I'm not clued up on electronics (circuit designs, etc) but can do basic soldering as I've made up interconnects before.
What I don't understand is all the various different caps that are available for each μF value and voltage. I've been looking at Panasonic on mouser and just selecting the 330μF brings up about 18 different caps with different physicsl sizes, ripple and ESR.
Could anyone here that has done this repair please advise me on what to look for in those finer details or does it not matter as long as the μF, voltage and max temp are correct?
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KeithL
Administrator 
Posts: 10,261
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Post by KeithL on Feb 23, 2023 17:18:49 GMT -5
In this case, as long as the value, voltage, and temp rating are right they'll work fine. With capacitors.... - it's always OK to go UP on voltage - it's always OK to go UP on temperature range (although the only common options are 85c and 105c) - the size and where the legs come out is important (you need radial) In some switching supply applications the ESR is critical... But, with these, as long as you use 105c temp rated caps you should be OK... Any "reputable brand" is going to have an ESR that is low enough to work well - and it isn't all that critical. (But it's a good idea to avoid "totally no-name knockoffs with unspecified ESR ratings".) These are the ones we generally recommend... and they're really premium ones... www.amazon.com/pcs-Panasonic-FM-Capacitors-1000uf/dp/B073YQSVZYwww.amazon.com/pcs-Panasonic-FM-Capacitors-330uf/dp/B073YQJWPLwww.amazon.com/pcs-Panasonic-FR-Capacitors-Ultra/dp/B072ST8MK4NOTE: 1. Let the power supply drain for about a half hour after unplugging before messing with it 2. Make VERY sure you put the new ones in facing the right way (keep track of the + and - leads) 3. (Don't assume that using larger values will "make things better"... ) Hey all, I've been having the same problem with my UMC-200 (same symptoms) and after emailing support theye recommend replacing the 3 caps C7, C18 and C19. I'm not clued up on electronics (circuit designs, etc) but can do basic soldering as I've made up interconnects before. What I don't understand is all the various different caps that are available for each μF value and voltage. I've been looking at Panasonic on mouser and just selecting the 330μF brings up about 18 different caps with different physicsl sizes, ripple and ESR. Could anyone here that has done this repair please advise me on what to look for in those finer details or does it not matter as long as the μF, voltage and max temp are correct? |
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Post by simonldt on Feb 23, 2023 20:27:19 GMT -5
Thanks so much KeithL for your reply. I have managed to order the same Panasonic caps you linked to and will report back once they arrive and have been fitted. Fingers crossed my unit comes back to life as I really have no idea how I would replace it right now. There just doesn't seem to be many processors only out there that are reasonably priced.
It seems in hindsight I maybe made a mistake of thinking it would be easy to just replace a pre-pro as new codecs/upgrades came about and feed my existing 7.1 channel power amp but it seems like the AVR is the most desired product. Luckily I don't require Atmos yet and the UMC-200 still fills my needs currently if I can it back to working.
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Post by simonldt on Mar 3, 2023 14:12:03 GMT -5
It lives!!
I ordered the Panasonic caps as KeithL posted above, they arrived a few days later (sadly paid more for the shipping and tax than the components themselves). Still it only cost me £20 and a beer for my brother who did the soldering (he is way more skilled).
My UMC-200 then booted up perfectly fine as if nothing had been wrong with it. I've had it on the last 2 evenings and it is working as before. I'm so chuffed it is back to life. Hopefully more years of enjoyment from this processor.
If any fellow UK owners ever need to do the same fix and stumble into this thread, I have 2 spare sets of C7, C18 and C19 caps which I can sell at cost plus postage (which would be much cheaper than ordering from Mouser or Digi-Key).
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