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Buzzing sound from power conditioner
Buzzing sound from power conditioner
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Old 14th September 2021, 03:28 PM   #21
mwilson is offline mwilson  United States
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Jean-Paul, I spent a fraction on it. No way I'd shell out that kind of money :-)

I ordered some of those caps from Mouser, and will attempt the replacement first. Will check the diodes also.

Thank you!
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Old 14th September 2021, 03:32 PM   #22
jean-paul is offline jean-paul  Netherlands
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You haven't answered which brand they are. If they are famous Wong Shu brand then maybe it is a good idea to replace all of them. Small number, small cost, 1 x shipping fee, better reliability.
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Old 14th September 2021, 03:34 PM   #23
mwilson is offline mwilson  United States
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Quote:
Originally Posted by jean-paul View Post
You haven't answered which brand they are. If they are famous Wong Shu brand then maybe it is a good idea to replace all of them. Small number, small cost, 1 x shipping fee, better reliability.
The Panasonic brand. I ordered the exact part number you mentioned. Unless I'm misunderstanding your question?
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Old 14th September 2021, 03:35 PM   #24
jean-paul is offline jean-paul  Netherlands
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The one that is now in it probably causing the trouble!

Now there are only a handful of electrolytic caps in that device so replacing that handful when of suspected quality is looking forward. BTW did you the the error in post #15 in my device? Give and take, mr. Wilson.
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Last edited by jean-paul; 14th September 2021 at 03:40 PM.
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Old 14th September 2021, 03:41 PM   #25
mwilson is offline mwilson  United States
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Ah, that one. I don't recall, and it won't be until later in the week that I'll be able to take another look at it. I'll let you know. There's only one such cap on that PCB.
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Old 14th September 2021, 03:42 PM   #26
jean-paul is offline jean-paul  Netherlands
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See your own picture and discover caps at the front....AND at the left side....reread my post and think what is best practice IF they are Wong Shu.
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Old 14th September 2021, 03:45 PM   #27
mwilson is offline mwilson  United States
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I meant there's only one of the type I'm about to replace. Did you mean to see what the other caps are, and replace them as well?
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Old 14th September 2021, 03:47 PM   #28
jean-paul is offline jean-paul  Netherlands
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Mmmm difficult for anglosaxon people. Just suppose that 47 F is kaputt. First thing to check is value and what brand it is but no reply (important parameter). Now if that cap is crappy ultra low cost quality and the others are too then maybe it is a good idea to replace them all for known good caps. Not "least effort/cheap" but quality/longevity.

Slogan:"open once, enjoy longer" or the like. OOEL yeah!
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Last edited by jean-paul; 14th September 2021 at 03:54 PM.
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Old 14th September 2021, 03:52 PM   #29
mwilson is offline mwilson  United States
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I'll happily replace all, and let you know the brand. It's just that I'm no longer physically by the unit, and won't be until later this week... so all goes by memory/photos that I posted yesterday. I can't see the brand from those photos.
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Old 14th September 2021, 06:13 PM   #30
NareshBrd is offline NareshBrd  India
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What he means is change all the diodes in the bridge with good quality parts.
And all the electrolytic caps in the entire unit, with good Japanese or European capacitors. 105 degree long life unit types intended for this kind of use.

Panasonic, Elna, Nichicon, Nippon Con-Chemie, Rubycon, Taicon (Taiwan), Wilma. Sprague, Vishay...all are reputed.

Also, this is a tap changer type unit, with triacs doing the switching?
It tries to control the input or output to give a steady output voltage?

Then please post photos of those, and the nameplate of the unit.
That part may also need modification.

Last edited by NareshBrd; 14th September 2021 at 06:21 PM.
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