Re: the gutless, bloated, and fried power supply hall of shame
Got this awhile back from a load of random cables grabbed from the Goodwill bargain bins. Label that was stuck over the real rating had this rated to 500mA. Imprinted label on the case has it at 200mA.
Best part: Damn thing can't even do 100mA without the voltage tanking. Output sagged down to 3V at just 125mA....
Hemingray
KABOOM!
Last Activity: 09-26-2023, 04:51 PM
Joined: 07-20-2010
Location: Fort Myers, FL
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Re: the gutless, bloated, and fried power supply hall of shame
These crapbox PSUs still exist in 2020?...Leave a comment:
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Re: Bose AWR1-1W (1995) (No Photos)
Update on this: Finally got the tester I ordered awhile back (one of those TC-1 multitesters), and tossed the suspect 470uF cap on it. Measured 127uF with 50 ohms ESR.Leave a comment:
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Bose AWR1-1W (1995) (No Photos)
Sorry for lack of photos, this was done around 10PM last night, but thought I'd share this with everyone as a bit of help on older tech.
Got a message from someone on our local "Pay It Forward" group regarding a Bose radio that was, in their words, "only producing static". I went & picked this up from them, and got it home, powered it up, and was greeted with the granddaddy of all loud humming noises. At this point I also observed the VFD display was flickering rapidly. This told me to check the filter caps in the power supply.
Opening this... -
Re: the gutless, bloated, and fried power supply hall of shame
Almost looks like the same SWCON craps in there too....Leave a comment:
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Re: the gutless, bloated, and fried power supply hall of shame
Looked like a Linkworld, but good to know Hercules liked overrating their +12V rails by a crapload too. The fan in this thing isn't even worth squat....Leave a comment:
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Re: the gutless, bloated, and fried power supply hall of shame
Build quality and parts used were the same as the 300W LW tested on JonnyGuru at one point, all the way down to the FR302 12V regulator and the 40NO3P 3.3V reg....Leave a comment:
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Re: the gutless, bloated, and fried power supply hall of shame
All caps in this thing are branded "SWCON". Don't see any other brands in here...Leave a comment:
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Re: the gutless, bloated, and fried power supply hall of shame
Here's my submission to the gutless hall of shame. A Duro "400W" ATX PSU, pulled from a curb picked XP PC. I'm going to hazard a guess this is just a crappy Linkworld PSU (Like the "300W" one on JonnyGuru's site). The output on this was so crappy that it actually took out a cap on the motherboard.
No bridge rectifier here, Just the 4 crappy diodes. EMI/RFI filtering? Bah! We don't need no stinkin filters! SWCON caps on every end of this thing, a +12V section that's good for 6A at the...Leave a comment:
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KELNA caps?
Are these supposed to be a knockoff of ELNA? Pulled 6 from a Sylvania 8 channel CCTV monitor that I picked up off the curb. The brown cap in the pic is a SamYoung KMG. The two Kelna caps on the right are visibly bulged, the remaining ones tested way off their values. Symptoms on the monitor was a severely delayed turn-on, and when it did turn on the vertical was jittery and smushed up on both ends.... -
Re: Netgear Prosafe GS116 16 port switch - bad cap.
Have this same switch, Although with one popped cap it would only work somewhat correct on random ports. Changing said cap restored normal operation. Still using it to this day.Leave a comment:
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Re: Acer AL1711: Two dead caps and a VERY fried resistor!
R1 which (was at one point) a 10 ohm resistor....Leave a comment:
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Re: Acer AL1711: Two dead caps and a VERY fried resistor!
Will do that. So far just replaced the two busted caps and the toasted resistor, and it does work again.Leave a comment:
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Re: Acer AL1711: Two dead caps and a VERY fried resistor!
Green fuse tests out alright.
Haven't removed it from circuit yet, but in-circuit I am getting 8.2k. Page you linked lists that as a 10 ohm resistor, so safe to say it's open since I'm getting 8.2k across itLast edited by Hemingray; 04-19-2015, 05:08 PM.Leave a comment:
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Acer AL1711: Two dead caps and a VERY fried resistor!
Got this one from work, No backlight at all. Aside from two bloaded 220uf/25V OST caps, there's also this very well done (probably past overdone) R1. Anyone that worked on one of these monitors know the value of this resistor?... -
Re: AX3650 no display
Make sure you didn't solder it in backwards....Leave a comment:
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Re: Apple API1PC12 power supply shuts down randomly
Glad to see the problem was resolved!Leave a comment:
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Re: Apple API1PC12 power supply shuts down randomly
Make sure the fan on the PSU is spinning when power is on. If it's not, this will be the main issue. Power supplies don't exactly like large amounts of heat too muchLeave a comment:
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Re: Inside an old Netgear Wi-Fi router
I'd have to dig it out after I move, it's currently packed up....Leave a comment:
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Re: Inside an old Netgear Wi-Fi router
Someplace here I have an old Dell Truemobile router that's like that. Even has a serial port on it for hooking up an external modem?Leave a comment:
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