Just popped this trying to test a Dell PSU I am trying repair and something obviously wasnt connected right. I bought this off ebay a few years ago. It was from a radio amateur who said he built it himself using a PC power supply. Ive just opened it up and its not exactly like what he said.
From what i can see its just a PC power supply enclosure he used and has fitted a Transformer with a Regulator and rectifier mounted on a bit of vero board It also has a Power transistor mounted at the front but (I dont know what that is for) and a Variable resistor and LCD display, When I took the lid off I
The vero board was just laying loose on top of a small sheet of plastic and was not held in place with anything and free to move around. It could have shorted out on something at any time. Not very well made!!
When I moved the vero board I found a loose (red) wire that looks like it came off a earth tag I think, but I am not 100% certain. It connects to the right hand leg of the LM317T.
So even the soldering is crap. Maybe this was a omen before it burst into flames at sometime. Well I am obviously going to get this fixed up properly when I get it repaired, He was also very naughty as I cannot see any inline fuse anywhere either. Its was miraculously all working fine until I hooked it up to the power supply I am trying to repair and it ddin't like it. There was no burning or smoke it just went dead.
Anyone suggest what to test first and maybe suggest any improvements apart from a inline fuse and securing that vero board. Anyway don't laugh, here are some pictures of it.
https://drive.google.com/drive/folde...4C?usp=sharing
From what i can see its just a PC power supply enclosure he used and has fitted a Transformer with a Regulator and rectifier mounted on a bit of vero board It also has a Power transistor mounted at the front but (I dont know what that is for) and a Variable resistor and LCD display, When I took the lid off I
The vero board was just laying loose on top of a small sheet of plastic and was not held in place with anything and free to move around. It could have shorted out on something at any time. Not very well made!!
When I moved the vero board I found a loose (red) wire that looks like it came off a earth tag I think, but I am not 100% certain. It connects to the right hand leg of the LM317T.
So even the soldering is crap. Maybe this was a omen before it burst into flames at sometime. Well I am obviously going to get this fixed up properly when I get it repaired, He was also very naughty as I cannot see any inline fuse anywhere either. Its was miraculously all working fine until I hooked it up to the power supply I am trying to repair and it ddin't like it. There was no burning or smoke it just went dead.
Anyone suggest what to test first and maybe suggest any improvements apart from a inline fuse and securing that vero board. Anyway don't laugh, here are some pictures of it.
https://drive.google.com/drive/folde...4C?usp=sharing
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