Re: the gutless, bloated, and fried power supply hall of shame
Both of those units are made by Channel Well Technology (CWT for short). The green transformers are a giveaway. I have a Thermaltake Smart M750W 750W unit from 2013 that's made by Channel Well. CWT is an OEM for I believe a handful of brands. CWT has made PSUs for Thermaltake, Antec, Corsair (I believe), and also have been sold under cheap labels like OKIA, ISO, among other generic brands. The quality of the unit all depends on how the requesting company wants their unit built. Kind of like how the quality...
cubecompmtdx
Member
Last Activity: 01-29-2023, 06:18 PM
Joined: 10-04-2010
Location: Huntersville, NC
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Re: FSP300-60THA - FSP 3528 datasheet equivalent
that component works with primary side voltages, so that why it's rated for 700v. The voltages get stepped down by the transformers. The way a SMPS works is it takes in 50/60Hz AC, rectifies it to DC, and stores it in the primary capacitors. Active PFC units work slightly different at this stage. The switching transistors take the DC power and turn it into a high frequency AC supply. I've heard that in some units the frequency is around 60kHz. With a high frequency, smaller transformers can be used to output more amps. This HF AC...Leave a comment:
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Re: FSP300-60THA - FSP 3528 datasheet equivalent
If the primary side isn't charging up, then I would guess that it could be the bridge rectifier Or if the unit has a main on/off switch on the back (not the voltage switch), then there's a possibility the even the switch could be bad in terms of staying open circuit. Also, just in case you haven't done so already, check the fuse. When primary switchers fail, the can pull a lot of mains current through them. I'm guessing since your unit lacks the DM311 chip, then it might use a two-transistor circuit. Older units, including FSP, tend...Leave a comment:
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Re: the gutless, bloated, and fried power supply hall of shame
It was definitely powering a system it wasn't designed to handle... My uncle was short supplied on PSUs, so he was running his computer with an Athlon 64 X2 4200+, 2GB or 4GB RAM, multiple HDDs, onboard GeForce 8100 graphics, and Windows 7. Pushing that 15A 12v rail a bit too hard. I gave him a Dynex 400w unit to replace it with. Now that computer's much happier!
the green caps on the secondary side are Koshin. The black caps nearby have the saturn logo on 'em. I'm guessing that's Chicony? lol.Leave a comment:
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Re: the gutless, bloated, and fried power supply hall of shame
I figured this unit would be a nice addition to the hall of shame. This is an Allied (Deer) AL-A300ATX unit (many different revisions carry that model number, I have an old pink labeled one kicking around). Decided to pop the cover off this power supply to inspect it. While these Allied/Deer power supplies are oftentimes known to have bad capacitors, this one was either
a. overloaded
b. improperly cooled, or
c. both
This unit does have a thermal fan controller, and the thermistor...Leave a comment:
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Re: Bestec ATX100-5 no +5VSB
LOL so Bestec put in a 10A capable part but slapped a 2A max on the sticker! This part can supply more power than the 100 watts this old thing is rated for! I have another one of these in another computer in storage. It needs some capacitors replaced. I'll make a video of the inside of it whenever I get around to it. One thing that shocks me is the size of those little heatsinks... maybe that's why they put such small ratings on it. But, just hook up a leaf blower Delta fan and you might be able to play Crysis with it
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Re: FSP FSP300-60THA(1) will not start...
Yes, I run CubeComputerChannel, and I'm glad to hear that you've learned some things from my videos! For those curious about the DM311 chip, I have a picture of it posted in my attachments on this thread.Leave a comment:
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Re: Bestec ATX100-5 no +5VSB
LOL the ATX100-5, also known as "The Little Fighter."
Glad to see you guys experimenting with this power supply. I'm curious to know what the 12v secondary silicon is rated for on this thing. The sticker states 2A for +12v yet my buddy pulled at least 20 outta it... (he did let some magic smoke out and had two extra fans stacked on top of it) and the unit in my video has been running my 60w (5A minimum) peltier fridge for 9 months non-stop without a problem. The capacitors (I believe JPCE-TUR) in it all appeared...
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FSP FSP300-60THA(1) will not start...
I got this power supply out of a parts system that didn't work. The PSU was the reason the computer wouldn't start. With the unit out of the system, I get 5vsb power but shorting the green and black leads on the 24-pin connector does nothing. The unit uses a mix of Teapo, Jamicon, and OST capacitors, none of which are bulging. The unit uses a DM311 chip for 5vsb, no two-transistor design in this one! This would be a decent power supply if it worked. It originally came in a Acer Veriton system. The original motherboard from the computer worked just fine. Really clean inside too!... -
Re: Biostar Geforce 6100-M9
If it has nothing to do with the capacitors, then the 6100 chip may need to be reflowed.Leave a comment:
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Re: Biostar Geforce 6100-M9
I know this thread is 2 years old, but I had a similar issue with my parent's system in terms of getting it to turn on. When it was running, it was stable, but if it was turned off for any reason, it was difficult to turn on. Pressing the power button usually did nothing (sometimes it would power on, but not POST). I would usually have to switch off the PSU for about 10 seconds, then switch it back on for things to work right. The motherboard is a WinFast NF4UK8AA socket 939 board. Turns out, all of the big caps on the 3.3v and 5v rail...Leave a comment:
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Re: Can a Bestec be made good?
If you do some research, you may find out that the 5vsb flaw is in the Bestec units marked "250-12E". From what I have heard, the 300w 12E units have much better standby circuits. As long as your emachine systems don't have the 250w 12E Bestec units in them, then you should be okay.Leave a comment:
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