Antec SP500P "resurrection"

[Khron]

Re: Antec SP500P "resurrection"

Okaaaaay... Bad news: on friday, the Antec pretty much kicked the bucket

When i left from home, around 11am, it was all fine. Around 2pm, when i came back, the psu made this constant ticking noise, and gave out all sorts of "glitches" on the tv (HDMI output of the mobo video) and the audio (s/pdif out from an SB Live).

A restart didn't fix it. Upon shutting down, wouldn't come back on.

Investigation: 5Vsb totally dead (0V).

Something still seems to be working though, just not right. Nothing's shorted on the primary, and on the PFC Vcc line i'm getting some 50mV or so.

Ideas?

[Khron]

Re: Antec SP500P "resurrection"

Odd twist: i had taken out the load resistor on the 5Vsb line, to measure the rectifier without interference; it checked out.

Then i thought i'd plug in the PSU to see if the switcher manages to power itself up (i wanted to measure the voltage it gets from the aux winding on the 5Vsb transformer). Upon plug-in, the series 100w lightbulb stayed lit; i promptly pulled the plug - it hadn't done this before, just the normal cap-charging brief pulse.

Soldered the resistor back in, same behaviour. The ViPER chip *DOES* get a bit warm after a 1-2second power-up.

I should start looking for a replacement, shouldn't i?

[everell]

Re: Antec SP500P "resurrection"

Sounds like your Viper might be bad - wouldn't hurt to replace it. What is the Vdd voltage on pin 4? Also, what kind of load does your computer put on the 5vsb line. The USB ports might be using some of that 5vsb power.