Re: Power supply build quality pictorial. part 2
Cool, thanks! I think it could do 500W..........at 15C ambient
Cool, thanks! I think it could do 500W..........at 15C ambient
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Re: Power supply build quality pictorial. part 2
Chieftec GPS-500AB AAttached FilesComment
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Re: Power supply build quality pictorial. part 2
^
Do I see a capxon on the 5vsb there?I love putting bad caps and flat batteries in fire and watching them explode!!
No wonder it doesn't work! You installed the jumper wires backwards
Main PC: Core i7 3770K 3.5GHz, Gigabyte GA-Z77M-D3H-MVP, 8GB Kingston HyperX DDR3 1600, 240GB Intel 335 Series SSD, 750GB WD HDD, Sony Optiarc DVD RW, Palit nVidia GTX660 Ti, CoolerMaster N200 Case, Delta DPS-600MB 600W PSU, Hauppauge TV Tuner, Windows 7 Home Premium
Office PC: HP ProLiant ML150 G3, 2x Xeon E5335 2GHz, 4GB DDR2 RAM, 120GB Intel 530 SSD, 2x 250GB HDD, 2x 450GB 15K SAS HDD in RAID 1, 1x 2TB HDD, nVidia 8400GS, Delta DPS-650BB 650W PSU, Windows 7 ProComment
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Re: Power supply build quality pictorial. part 2
I did similar, 400W model couple days before. Besides the Samxon on primary it was full of crap, Capxon on +5 V SB was bulged. It was basically Delta PSU, they used the same model number and just placed Chieftec there
Less jewellery, more gold into electrotech industry!
Half of the computer problems is caused by bad contacts 
Exclusive caps, meters and more!Hardware Insights - power supply reviews and more!Comment
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Re: Power supply build quality pictorial. part 2
That's a nice power supply. How many 12V rails does it actually have?Comment
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Re: Power supply build quality pictorial. part 2
Mine actually had two and due to all those potentiometers and overall big daughterboard on secondary here (possibly full of monitoring ICs) I'd say it has all three.Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts
Exclusive caps, meters and more!Hardware Insights - power supply reviews and more!Comment
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Re: Power supply build quality pictorial. part 2
Chieftec buys direct from Delta and just slaps their label on. A few years back they were the ONLY brand that would get you a decent power supply at a reasonable price, around here.A working TV? How boring!Originally posted by PeteS in CAComment
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Re: Power supply build quality pictorial. part 2
It's better than those older Chieftec's that used Jenpo caps, those are some of the least reliable caps I've seenComment
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Re: Power supply build quality pictorial. part 2
Yeah but those times are long gone. Where si Chieftec now? You barely hear about them, recently they started selling new mediocre line with like 6 different powers, but it offers nothing over similar chineese PSUs which are now everywhere around. Not mentioning branded low-end and mainstream PSUs…
Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts
Exclusive caps, meters and more!Hardware Insights - power supply reviews and more!Comment
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Re: Power supply build quality pictorial. part 2
So I recapped that Dynapower PSU, removed the dummy resistors on the main rails and replaced the 30A ultra fast on the 12V with a 40A schottky rectifier. A few of the little Fuhjyyu caps were over 20 ESR!
Attached FilesComment
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Re: Power supply build quality pictorial. part 2
That dynapower is a CWT unit, btw.
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Re: Power supply build quality pictorial. part 2
My original hunch was right, thanks for confirming it
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"pokemon go... to hell!"
EOL it...
Originally posted by shango066Originally posted by smashstuff30guilty,guilty,guilty,guilty!
guilty of being cheap-made!
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Re: Power supply build quality pictorial. part 2
Yup, a CWT unit from their ISO line. You can tell by the "ISO" markings on the PCB close to the fuse.
It's an overall good design minus the 2-transistors 5VSB circuit.
I've seen a lot of these now mislabeled on purpose with UL numbers pointing to other random PSU companies. The two I have - a Cyberlink and a Turbolink, point to Deer/L&C and Macron Power, respectively (IIRC).Comment
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Re: Power supply build quality pictorial. part 2
Samsung TAD037JBE cell phone charger
Output: 5VDC 0.7A
The caps are all Sam Young. The primary caps are SHD series 4.7uF 400V, and the output filter caps are KMF series 470uF (pi filter input) and LXV series 220uF 10V (pi filter output).
The switching IC is an SC1009PN, which I can't find any information about.
The output cable plugs into a connector on the board, and the fingers on the edge of the board contact the prongs of the plug.Attached FilesComment
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Re: Power supply build quality pictorial. part 2
Using PWM, that's quite nice…for occasional use, why not. But running daily, the caps will die.Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts
Exclusive caps, meters and more!Hardware Insights - power supply reviews and more!Comment
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Re: Power supply build quality pictorial. part 2
Cellphone chargers have been SMPS type for quite a while now.A working TV? How boring!Originally posted by PeteS in CAComment
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Re: Power supply build quality pictorial. part 2
Yeah but many are some awful single/two transistor forward designs.Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts
Exclusive caps, meters and more!Hardware Insights - power supply reviews and more!Comment
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Re: Power supply build quality pictorial. part 2
The logo on that chip looks to me very much like http://www.powerint.com/
Must be some older discontinued chip. I've seen the TNY276/277 used in several ATX 5Vsb's though
(particularly some Dell / Celetronix 305W units)
Khron's Cave - Electronics - Audio - Teardowns - Mods - Repairs - Projects - Music - Rants - ShenanigansComment
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I have wanting to do this project for quite sometime now and I finally found a switching power supply that will work on this desoldering gun station ZD-915 that the original switching power supply took a shit and just was not worth trying to fix it because this switching power is not quite big enough to handle the heater element and the vacuum pump
One note when I tested the switching power supply and the voltage control board I noticed that this desoldering gun heat up much faster than the original switching power supply which I was really surprised by to the point that I might buy... -
I have been working on this concept for quite some time now with limited success but recently I found a switching power supply that is setup for the voltage that this soldering station needs to operate at however it also needs part of the secondary circuit from the original switching power because you need several voltage rails
I once tried to get a ZD-915 desoldering station to work on a 18 volt battery power supply but unfortunately things did not go well but I did find a work around but I might try this idea again but going at a little differently more about this another time... -
The sub developed a constant popping every couple seconds from woofer and power LED flickering with nothing but wall AC connected. Connecting an audio cable didn't change anything. It doesn't play but a second or two of audio in between the pops.
Opened it up and discovered the power supply is making a faint clicking or ticking sound.
I measured the amp's output to the woofer and it pulses up to 50mv DC to be driver. The pulses coincide with the power supply ticking/clicking.
I measured the power supply output going to the amp board and it too has this pulsing. Voltage cycles... -
More Lo-Fi speakers and another DIY surround repair. The patient this time: a pair of Philips F9217L-50R speakers from a budget Philips rack/component system from the '80's. The system belongs to my brother in-law… or actually his parents. However, they didn't want it when they moved houses and he liked it anyways, so he ended up keeping it. It's a pretty cool-looking vintage system with a wood/veneer cabinet and shelves for records and cassettes. Unfortunately, I didn't get a chance to take a picture of it or get the model #'s (but maybe next time I visit, if anyone is curious?)
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Boston Acoustics fans, this thread might not be for you.
A few years back (~2018 time frame), I picked up a set of free JVC speakers from someone on Craigslist that no one seemed to be interested in. The guy also had a single Boston Acoustics HD8 speaker – yes, just one cabinet. He said he had no idea where he got this one from or why it's only by itself. But like the JVC speakers, it was going to get tossed at the end of that week… so I came to collect, as usual. And that's all I know about this HD8. After all, I figured why not take it and see what's inside… show it to the...
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