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In Reply to: RE: It is defective posted by aarocks on August 25, 2016 at 14:15:47
But if you haven't the knowledge to identify the failing cap and then replace it, you'll have to find someone who does. The caps themselves are not expensive.
But it could be something(s) else and, if so, would take some more time to find. I have certainly heard of cases where Chinese mfrs. think they are duplicating an existing circuit, but implement it incorrectly. Sloppy QA is another problem. But Chinese mfrs are not alone in this!
Follow Ups:
How would you recommend I go about this? I have a little soldering experience but not much. I tried to find someone locally who could fix another electronics problem once but that didn't work out. I'm up for doing it myself if that's a plausible solution but I don't know how to go about it.
I'm not familiar with amp. I wouldn't try. Just remember, to test an electrolytic or high value film cap with a DMV you have to bleed off the stored charge first. If you're not comfortable with high voltages, find another tech.
How can I find someone to ship the amp to to fix it? Preferably in the California-ish region.
Where in California are you?
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Bottom third. :)
I'm in Ojai.
I'll look at it for you for free if you bring it to my house.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Sometimes I get so thoroughly fed up with the snarkiness and sniping at this place that, on two separate occasions, I've deleted my profile. Then I run across something like your post where a guy is just helping a fellow audio freak out, and it makes me realize what an asset it can be if we choose for it to be so. You've restored my faith in human nature for a while. Thank you.
You're welcome.
I may regret it though.
From what I read it could be a poorly designed power supply circuit (hums when new) and until I get it on the bench I don't know how much redesign it might need.
It should be interesting in any event.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
I've worked on several modern guitar amps, which came with defective PSU caps. Not sure if the issue is storage, once built (humid, salty air) ---prior to sale. Or perhaps, poor cap manufacturer's QA/QC? A few have been "boutique" $$$ ampsReplace with new, quality caps ---> hum issues gone.
Modern day solder and soldering techniques in products, are another can-of-worms.
Good luck with the fix!
8^)
Edits: 08/31/16 08/31/16
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