Somethings blown in PSU for a powered sub, not sure what it is. 3 of them in a row.
Both internal fuses blown too
Both internal fuses blown too
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Re: What is this that has blown?
They are ceramic capacitors the ballast across the bridge rectifier. Checked bridge rectifier for S/C ? More than likely its shorted.Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !
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Re: What is this that has blown?
Says 104 with a line underneathComment
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Re: What is this that has blown?
whats s/c?Comment
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Re: What is this that has blown?
104 = 100000pF = 0.1uFComment
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Re: What is this that has blown?
Bridge rectifier is KBJ610 which I will test tomorrow
http://www.ebay.com/itm/KBJ610-6A100...0AAOxypthRv~-m
The text is placed in a different location to mine, but will that work? (if it indeed is shorted)Comment
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Re: What is this that has blown?
s/c = short-circuit
o/c = open-circuit
104 = 0.1 uF
Can you post more pictures of the board (both top and bottom side). Perhaps it would be good to know what these caps are used for, which might explain why they blew.
As long as the part number matches, then yes. Different manufacturers put the text as they see fit, so nothing to worry about.Originally posted by mikay786
Also, once everything is fixed, I would suggest you plug the device through an incandescent light bulb to limit the current, just in case something else is shorted. This will keep you from blowing more parts.Last edited by momaka; 10-29-2015, 04:40 PM.Comment
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Re: What is this that has blown?
oh boy, those caps look too small to handle high voltages...especially if they are hooked across the diodes in the bridge. I wonder if they blew just because the voltages were too high for them?Comment
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Re: What is this that has blown?
Could I replace bridge rectifier with a different model, something I can source locally or do I need to get the exact same model number?Attached FilesComment
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Re: What is this that has blown?
You can as long as you get the voltage rating the same and amps roughly the same.Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !
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Re: What is this that has blown?
Could you link me to one please, no idea
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Re: What is this that has blown?
Have you even checked if its shorted ?Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !
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Re: What is this that has blown?
Looks like you are 100% right, based on the pictures that mikay786 just posted.
I would just remove those caps, test the bridge rectifier, and if good, test the amp like that.
Yes. You can even use 4 diodes if needed (for testing), but it definitely won't look good.Originally posted by mikay786
Anyways, as the others said, first test the rectifier before even worrying about getting replacements.
The worst thing to do would be to keep changing parts without testing anything and then hoping the thing works at some point.Last edited by momaka; 10-29-2015, 05:31 PM.Comment
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Re: What is this that has blown?
Yes it will need to be as if there is another short on the primary side it could give you an inaccurate result.
Watch this it shows you how to test one:
https://m.youtube.com/watch?v=dqkT6hF0O3EPlease Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !
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Re: What is this that has blown?
Cheers, was just watching that too!
I'll report in morning.Comment
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Re: What is this that has blown?
No worries let us know how it goes
Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !
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Re: What is this that has blown?
@mikay786, could you tell us the part number of the main IC on your board? I'd just like to satisfy my curiosity.Comment
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Re: What is this that has blown?
Bridge rectifier seems to be ok like the one in the video
measures in at 0.466 & 0.456
Theres not much else on the board apart from caps, resisters and the TDA7294
What else should I check?Comment
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Re: What is this that has blown?
Next could be the main transistors. Tbh you could probably run it with out them caps present.Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !
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Hi all, a newby question about a bridge rectifier I'm trying to identify.
I'm in the midst of reparing a battery charger in work which went pop, The bridge rectifier has shorted and took out a couple of other components. The rectifier in question has a part number KPB305G, and it looks like it's obsolete. Does any one know what I could replace it with?... -
Hello
My Fujitsu Esprimo Q556 motherboards blew up. At least fuse, bridge rectifier and capacitor got damaged. I have changed fuse and bridge rectifier (DF1508S), but I don't know what capacitor it is (picture). I know that capacitors size is 47nF, but I don't know other specs for it. Can you help me to choose right capacitor for my motherboard?
There is 240V AC on input side of bridge rectifier and 340V DC as output on capasitors side.
Thanks.... -
Hi, a friend of mine gave me this broken power supply, aparently it's the rectifier bridge that was damaged months ago. He took it to a technician and they didn't have the repair tools necesary but they remove the original bridge rectifier since it was damaged(burned). I have some of this rectifiers laying around, but they are not the same. The original its a pair of GBJ1506
And I have KBL06 , KBL406 , RVB406, D5SBA20, D3SBA60, GBU608. Most of them have similar values to the original, but I'm not planning to use the PSU at full load (ie: SLI, an I7 processor, etc).
TomsHardware... -
I have a 40 volt AC transformer that I put a bridge rectifier on, and I wanted to see the input signal and the output signal on the same screen on my scope, so I set one channel up with the test lead on one side of the input and the ground lead on the other side of the input, then I used another channel on the scope and clipped the test lead on the positive side of the output then the ground on the negative side of the output.
When I connected the transformer to power, the wire that was connected between the ground lead on the second channel and the negative side of the bridge rectifier... -
I had my Quadra 840AV (which I recapped and had working) plugged in for some time without using it and randomly decided to turn it on today. Unfortunately it did not turn on. After checking the PSU, I found out I was not getting anything from 12V, only from the 5V rail. After a few minutes, I removed the PSU and plugged it back in the electrical outlet and it suddenly started making a weird sound and soon after smoke started coming out. I quickly unplugged it. I opened it up but on first instance I didn't see anything out of the ordinary really. I later turned it back on and one of the MOVs blew...12-22-2024, 05:07 AM
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