Seasonic SS-500GB "ticking"

[Uniballer]

Re: Seasonic SS-500GB "ticking"

Does the supply function as it is supposed? All voltages, ripple (if you have hardware to measure it).

I reflowed a few solder joints that looked iffy, and the ticking has stopped.

Rather than risk the motherboard again I just put 2 old DVD-RW drives on the supply for a light load. The voltages look OK on my DMM (best one I have here today is a Fluke 117). And checking for ripple with the meter set to AC volts gives about 25 mV. But the scope shows horrible noise bursts about every 13 uS (76.9 kHz) of almost 10V peak to peak but very short duration. A pretty good supply set up with the same load shows less than 90 mV peak to peak. Note to self: you can't check SMPS ripple with a Fluke 117 [edit: I just checked the Fluke site and AC V & mV accuracy is only specified to 1 kHz].

So is that most likely just output filtering on the SS-500GB? I will try to check all the caps, as usual...

[domas]

Re: Seasonic SS-500GB "ticking"

Does the supply function as it is supposed? All voltages, ripple (if you have hardware to measure it).

I had a similar issue while i was working on my q-tec adjustable PS (it was outside the case of course). I was ticking at low voltages and buzzing from voltages 10++ at voltages over 12V it was squeaking like crazy and would shut down. I even managed to burn some components like that.

Problem solved by putting it back to the case (grounding). Please check your y-caps.
You can touch GND with your finger while its making sound, if it silences itself then it probably is grounding issue.

[Uniballer]

Re: Seasonic SS-500GB "ticking"

D301 (axial) and D304 (TO220 on the heatsink) both appear good with a DMM diode check.

Oops. That's D303 and D304. (how come I can't edit that post anymore?)

BD001 (bridge rectifier) checks out OK.

[Uniballer]

Re: Seasonic SS-500GB "ticking"

i just think that is the "noise" that was filtering, some case other person have a sensitivity to hear that..

Except that I never noticed it on that machine before, and last night after everybody went home I could hear it from 6 to 8 feet away from the front of the system.

D301 (axial) and D304 (TO220 on the heatsink) both appear good with a DMM diode check.

[senz_90]

Re: Seasonic SS-500GB "ticking"

Last night I noticed this SS-500GB started making a ticking sound. I made sure it wasn't the fan, then opened it up. I put a tube to my ear (aka redneck stethescope) and the sound appears to be coming from near the toroid by the primary cap. The caps all look OK to the eye. The primary is a Rubycon CE 330uF 450V. Most everything else is United Chemicon KZE series.

The more load is on the power supply the faster the ticking. When I start the power supply with no load it ticks maybe two or three times per second, but it ticks much faster when the entire system is running.

Any clues? Schematics? Advice? Thanks.

i just think that is the "noise" that was filtering, some case other person have a sensitivity to hear that..

[Uniballer]

Last night I noticed this SS-500GB started making a ticking sound. I made sure it wasn't the fan, then opened it up. I put a tube to my ear (aka redneck stethescope) and the sound appears to be coming from near the toroid by the primary cap. The caps all look OK to the eye. The primary is a Rubycon CE 330uF 450V. Most everything else is United Chemicon KZE series.

The more load is on the power supply the faster the ticking. When I start the power supply with no load it ticks maybe two or three times per second, but it ticks much faster when the entire system is running.

Any clues? Schematics? Advice? Thanks.