I got this Antec smartpower 450W (SP-450p), non working power supply, for free from a friend sometime ago. What I found in it, was a bad cap (EC10), which I replaced (picture No.1), a fried resistor (R11) and a shorted 1n4728a zener diode (ZD5). I did some research and I found that the resistor had a value of 5.6 Ohms. I'll post links to the forum threads that I found this information from tomorrow. After replacing the diode and the resistor, I plugged the power supply in and not very surprisingly, the resistor started smoking. I traced the traces and found that the resistor and diode are connected to one another as well as a MOSFET, which is between other components and I can't see its model, but it doesn't appear to be shorted. The resistor also goes to a CCM-PFC (ICE1PCS01) datasheet: https://cdn.badcaps-static.com/pdfs/...a448f3ad78.pdf
Now to my question. Because I couldn't find any faulty components I desoldered the diode and lifted one of the resistor's legs and the power supply worked! I tested it in a PC running prime95 and furmark and it ran stable for about 30 minutes. Why is this happening? Isn't the CCM-PFC mandatory for the operation of the PSU? Or is it that these components are used for something different entirely? Also, do you have any ideas why the resistor keeps frying if connected? And one last thing, is it OK to use the PSU like this, if it's stable?
Now to my question. Because I couldn't find any faulty components I desoldered the diode and lifted one of the resistor's legs and the power supply worked! I tested it in a PC running prime95 and furmark and it ran stable for about 30 minutes. Why is this happening? Isn't the CCM-PFC mandatory for the operation of the PSU? Or is it that these components are used for something different entirely? Also, do you have any ideas why the resistor keeps frying if connected? And one last thing, is it OK to use the PSU like this, if it's stable?
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