Just couldn't resist....here is a Dynex DX-PS300W.......with cover removed!
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Old proverb say.........If you shoot at nothing, you will hit nothing (George Henry 10-14-11) -
Re: Do no remove this cover under any circumstances
I've seen worse.A working TV? How boring!Originally posted by PeteS in CA -
Re: Do no remove this cover under any circumstances
I was referring to the writing on the label on the case. It says "Do not remove this cover under any circumstances". LOL! Once inside it is just a cheapo half bridge configuration with KA7500 pwm chip, 2 transistor 5vsb circuit, and primary caps are 330 uF. I doubt that it would stand up to 300 watts.Old proverb say.........If you shoot at nothing, you will hit nothing (George Henry 10-14-11)Comment
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Re: Do no remove this cover under any circumstances
"Fan controlled Power Supply"?
So, the fan controls the psu?
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Re: Do no remove this cover under any circumstances
It would be good for 150-200W. It seems quite decent psu.
KA7500 is TL494 under a different name.
It has good input filtering, lots of heatshrinking, good quality soldering, output filtering and perhaps what I see even 5Vsb made with a linear regulator. It even has a fan connector, very nice. Shielded caps from input transitors/Fets and an input switch. LM339 for Overvoltage protection. Recap and it should run fine.
I have seen PSU's made far worse. No output chokes, input RFI filters were just wires, underrated resistors.Last edited by Pyr0Beast; 12-04-2010, 10:31 AM.Comment
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Re: Do no remove this cover under any circumstances
I hope there is plastic insulation among the pcb back and the metal case...
It could do 300W if the input caps are replaced with 680uF and the primary transistors are something like 13009 or better.
I would also check the secondary silicon and recap the output caps with 2x2200uF for every output (3.3V, 5V, 12V) just to be safe
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Old proverb say.........If you shoot at nothing, you will hit nothing (George Henry 10-14-11)Comment
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Re: Do no remove this cover under any circumstances
Translations from Chinese to Engrish are always funny.
A working TV? How boring!Originally posted by PeteS in CAComment
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Re: Do no remove this cover under any circumstances
What brand are those primary caps? GSC?Comment
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Re: Do no remove this cover under any circumstances
I see HEC.A working TV? How boring!Originally posted by PeteS in CAComment
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Re: Do no remove this cover under any circumstances
KSC. Very low end huntkey. Knowing huntkey its a 200w, 300w peak.
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Re: Do no remove this cover under any circumstances
I wouldn't call anything with a transient filter "very low end". Though agreed, that won't do more than 200-250W.A working TV? How boring!Originally posted by PeteS in CAComment
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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
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Re: Do no remove this cover under any circumstances
Yes, the two power supplies do look very much alike. In fact, the part numbers on the three transformers between the heat sinks are identical!
The primary caps are HEC 330 uF/200 voltsOld proverb say.........If you shoot at nothing, you will hit nothing (George Henry 10-14-11)Comment
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Re: Do no remove this cover under any circumstances
I have a picture around here somewhere of a crappy PSU that actually had this STAMPED in the metal - "Do not screw off!", with an arrow pointing to a screw.Ludicrous gibs!
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Problem
This is an LG edge LED lit LCD Display. The LEDs are on the bottom edge of the display. There are 2 bars (left and right) Each bar has many LEDs and a 6 pin connector. Each pin drive several LEDs thus is the highest current flow / heat junction. The weak lead free solder gradually fails with thermal expansion/contraction cycling and increases resistance. PSU will compensate up to a point, then when the current is too high, PSU just shut down the backlight causing a dark display. I have even seen one which the connector just fell off as solder points became completely detached.... -
Like the title states. TV is 3 years old and Im getting 6 red blinks, which is backing lighting issue or driver. I just cant find any info on how to remove the panel to access. Any info would be greatly appreciated. -
Hi, i have a Panasonic Cf-W5 with the bios password, I tried remove cmos but problem didnot solve.
I uploaded the picture after remove cmos battery, It look like this is a Phoenix bios. The bios dump file in the link i attached
Please help me remove bios password.
Thank you so much -
every time I open the tool, I have the screen that appears
and I am always in a hurry to use it so I click and it automatically sends me a link to the manufacturer.
It annoys me lol.
2 solutions to remove it.
Either you remove pic.bmp and it no longer appears so no more links when clicking.
or else you can modify the exe to remove the .bmp
hope this helps users...01-15-2025, 03:24 PM -
TV was fixed just after removing Samsung's rear snap cover.
This curved TV's construction is rather interesting. When the snapped on back is removed, rest of the TV will relax the curvature. Top of LCD panel is loose as it wants to straighten out against the slightly curved bezel. Snapped back provide most of the curvature shape. So just simple disassembly of rear cover will allow the rest of the TV frame to relax its curvature. Thats probably what fixed it but no idea which connection. 4x LEDs are edge lit.
Maybe PSU->backlight connector didn't have a good contact?...07-23-2025, 12:34 AM
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