Re: 2A265 Vcc and Gnd shorted
The little red one marked D15? The 2A265 IC is the one marked U804....
squeeish
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Last Activity: 06-12-2021, 04:04 PM
Joined: 04-29-2011
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2A265 Vcc and Gnd shorted
Hi guys,
I have limited electronics knowledge, but I'd like to find out what's going on with this power supply I'm fixing for a DVD player as a hobby.
Here is the board in question:
The biggest capacitor there is 400V 22uF, receiving about 300V just fine. It's newly replaced too, as well as the small 47uF 50V capacitor next to it because of the black spot on the board there.
The 2A265 IC isn't receiving Vcc (pin 7), and it seems to be shorted to Gnd(pin 8). For the life of me I can't figure out why as the... -
Re: Apple Cinema HD Display LCD 23" (A1082) with 24V power supply (A1097)
Welp that didn't work. I also replaced the 3 220uF capacitors to no avail.
I was thinking of getting a 25V 4A generic power supply and hook up the connector board to it. That should work right?Leave a comment:
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Re: Apple Cinema HD Display LCD 23" (A1082) with 24V power supply (A1097)
I've the exact same rise and fall of voltage as OP described. Fingers crossed this works, and many thanks for this thread, otherwise I'd have never found the problem.Leave a comment:
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Re: Coolermaster RS-460-PCAR-A3 Repair
No burns or cracks on any component as far as I can tell, although I'm pretty sure I smelt a little burning when the PSU shorted out the first time.
The diodes are glued onto the board and I broke one while attempting to remove it.
Looks like it's not worth the effort to repair this PSU?...Leave a comment:
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Re: Coolermaster RS-460-PCAR-A3 Repair
Anyone?
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Re: Coolermaster RS-460-PCAR-A3 Repair
Hi mariushm, I realised that a few minutes ago and I edited them. Can you see them now?
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Re: Coolermaster RS-460-PCAR-A3 Repair
Hi mariushm!
I tested all the diodes I could see. There are two zener diodes (ZD1 and ZD2) that seem shorted both ways, not sure if that's the behaviour for zener diodes. The rest of the diodes are fine, except for D15 that gives me a short beep in both directions. D23 gives a long beep in both directions.
Here are some pictures. I have no idea which parts are the switcher transistors/active PFC circuits though. Let me know if you want more pictures at certain angles.
...Last edited by squeeish; 03-14-2013, 06:25 AM.Leave a comment:
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Coolermaster RS-460-PCAR-A3 Repair
Hi! I have this same exact PSU in a computer my dad brought home to test. It worked for years but the moment we turned it on in our house our circuit breaker tripped and there was a faint burnt smell from the PSU. The rest of the computer worked fine with a replacement PSU.
Now that I've got some free time I would like to repair it. The internal fuse was blown (250V 12A), so I replaced it but my circuit breaker tripped again when I powered it on. The new fuse remained unharmed.
Could anyone help me out on my next steps? How do I test +5VSB?
I have a multimeter... -
Re: E13009F and J13009-2
It isn't of use anymore, I just blew the fuse on the power supply and tripped the circuit breaker in my home when the power supply I was attempting to repair fell and landed on metal... and as luck would have it, the other transistor got shorted.
I suppose that transistor is unusable now.Leave a comment:
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Re: E13009F and J13009-2
Ah thanks! Looks like I wasted $3 then.
But they're essentially the same component?Leave a comment:
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