Good find! I’ve seen resistors do that. Really annoying it gets when the resistor is cold and has its original value, but then after 10 seconds it goes high in resistance and everything dies. Been there done that. Soooo does this thing work now?
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works like a charm! No more excessive noise from
the rca jacks/ speaker output and the sound quality is superb. I have 3 now these things and they are absolute monsters… web based gui with eq. if you see a kda500 or kda1000 on ebay that’s not working, do your self a favor and snag one as they can be had for $100 or less in most cases.
I have not seen a bad amplifier section yet as they have all had issues with the power supply but most repairs only require the replacement of one 16v 1000u filter cap. This was the most difficult one i had to fix to dateComment
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Awesome! Sometimes it’s a tough go at the fault finding part but the repair itself is usually “easy”.Comment
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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.
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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... -
My samsung plasma pn59d530a3f recently had a loud pop and stopped working. after opening it up, I found a blown resistor and capacitor on the power supply board. The circuit board was damaged where the resistor connects so I opted to buy a replacement board.
after installing the replacement power supply, the tv powers up but has no picture. The electronics store I bought the power supply from said the next likely culprit could be the Y Main board.
Is there a way to test the Y Main board before just buying a replacement? Or if there are other areas I should check?
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I found a project in the electronics trash yesterday. A nice Argon SA1 audio amp with some electrical issue. Took it apart and saw that the 4A250V fuse was blown so started lifting components to find the short. Eventually got to two MOSFETs (model FTA14N50C) that are shorted and when i took them out the short was gone.
Now i didn't have any replacements of the same model of course but i found a couple with pretty similar spec i thought (K10A60D & K12A50D) and put them in. Also replaced the blown fuse with a 3.5A250V one. Checked another time for short circuit and plugged it in.... -
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...
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