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better to keep quiet and be thought a fool, than to open your mouth and remove all doubt -
Re: ANTEC Power Supply EA-430D - Suddenly dead!
Does it even get power? Fuse OK? Do you get voltage on the big input cap when you plug it in? Be EXTREMELY carefull not to short anything and electrocute yourself.Less jewellery, more gold into electrotech industry!
Half of the computer problems is caused by bad contacts 
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Re: ANTEC Power Supply EA-430D - Suddenly dead!
Sorry - that voltage is down to earth.
There is 325 V DC across the cap itself.Comment
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Re: ANTEC Power Supply EA-430D - Suddenly dead!
Yes that would be about OK. So the problem is in the stand-by circuit alone.Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
Hello!
i got a damaged Manson NTP-5561 (60V, 1,6A DC output) and and the main issue is that the controler IC for the LCD display has a short. The controler IC PIC18F87K90 is mounted on the back of the back of the LCD. Vss-Vdd = 3 Ohm. The 5V and 3,3V power line was killed as well, but that is not a problem. A new LDO 3,3V and 5V 7805 is already ordered.
Replacing the PIC18F87K90 is necessary but that makes no sense without having the HEX dump of the new controler.
Does anybody have such a power supply and could do a HEX dump of the Flash and EEPROM memory?
...04-12-2025, 10:38 AM -
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... -
Hi, have this Samsung QE 75 Q 7 FGMTZG TV with no function. First analysis shows the power supply board is dead and fuse blown. Power Supply has the number BN94-11439A. I did short circuit test transistor and diodes and those do not appear to have shorts. I must admit I did not look at every single data sheet.
In the TV was some black dust residue, so probably one of the electrolytic caps blew, but they do not show short either.
Does anyone have schematics for that board ?
Any good tip, what could be the issue ?
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The power supply was completely dead. Voltage reached the main capacitors, but nothing after that.
After checking, I replaced the UTC7606D IC to restore the 5VSB.
I using SDC606U as a replacement, but it didn’t work — possibly the IC itself was faulty.
Replaced it again with another UTC7606D.
Result: 5VSB came back, but still nothing — no 12V, 5V, or 3.3V.
After checking again, I think the issue was with the UTC7520D IC.
Replaced it with a WT7520.
Result: PSU fully working again...
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