Identifying Burned Components in ENlight ATX-723B 230W PSU: 15SP 016 & 08SP 015

Question

Burned components: 15SP 016 (reference plate TR1) 08SP 015 (reference on the TR2 board) What to do? Probably the power supply was very long running in keybord on mode, something like that, the power strip was not turned off. I am asking for exact specifications of these elements.

Adam1988 · Answer

These are ordinary varistors, make a bridge instead. Do it yourselves, they do not burn themselves. Maybe there is a short circuit.

idradek · Answer

Since they are varistors, after burning out they should not have a transition, and these have so are good. Besides the bridge is good, good transistors (those on the heatsink seems to be the ones that key Q1, Q2), capacitors (those 2 large C8, C7 200V 470uF) charge, I think I have a short circuit at the diodes (such a double attached to the heat sink) I desorbed one D15 and it is operational. The big one in the middle is also efficient D16. (there are three on the heatsink D14, D15, D16). I'm not sure if there should be such a situation that you can not check D14, D15 on the board (the transition is in each direction)

ENCHANCE ELECTRONICS CO.LTD is in the middle of the tile
probably some connections with ENLIGHT

Adam1988 · Answer

Hello.

Is there a voltage of + 5V on the green cable? What happens when you close the green with black?. If the power supply fell as it was turned off, the first 5V standby converter would have rather flew.

idradek · Answer

Gray and blue have negligible low voltage, and green has no voltage ...

I replaced the 560K (0.5W) resistor,
After shorting green with black starts me only for a moment why?
I charged him with an old CD-ROM, and at the output of the stand-by system I have 5V on purple, 20V on yellow, and at the ATX output I have 4.5V on green 5V on purple.
I suspect that something is still to be exchanged.
edit:
I thought that you need to put a green on the mass for a moment and will start to run for a moment, but if I permanently shut everything is ok, I need to check all the voltage at the exit.
Identifying Burned Components in ENlight ATX-723B 230W PSU: 15SP 016 & 08SP 015

norbi · Answer

Changing also electrolytes I have such a power supply in front of me because I did it recently. It is good quality and can be slightly sensitive to changes in the parameters of the elements. Have an electrolyte replacement helped, and this 560K resistor is best to give it some more than the original one if you have where to insert
I started my computer with Athlon 1700 on this power supply and walked - strong art

And as for this momentary operation, this is how sometimes the power supply from the damaged diode is behaving and not always as you can find the meter because it can only pierce under a greater voltage than those from the tester in the meter

idradek · Answer

The power supply is now fully functional and now it comes to a friend and everything is OK. It has a Pentium III, which also pulls a bit.
He had a 300eg Codegena power supply, but the integrated circuit in it went as I opened it, the integrated circuit did not have one leg until it evaporated. Although his Codegen was 300WWto, this Enlight 230W is a more robust construction and can withstand more than Codegen (this is just my observation).

Identifying Burned Components in ENlight ATX-723B 230W PSU: 15SP 016 & 08SP 015

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