Re: SS-600ET PSU Chirping

After months of operating with this annoying chirp, today it just mysteriously vanished.

I was able to find at least one report of a fix for a similar model. The owner replaced a couple suspect SMD resistors:
[url]https://www.techpowerup.com/forums/threads/psu-clicking-noise-its-not-the-fan-or-coil-whine.250088/[/url]

Perhaps it's a bad solder joint, that is now making a connection after my recent fiddling.

Because this unit is in service, I have yet to inspect the bottom side of the PCB. I have another Seasonic...

I have a PC Power & Cooling Silencer Mk III 600W that chirps constantly and increases in frequency along with load. At first I was convinced it was the fan, but the noise is there even with the fan disconnected.

I could upload an audio snippet somewhere, but it is the exact same sound found here (be careful with headphones): [url]https://www.youtube.com/watch?v=p0A-dxoFItQ[/url]

Based on a little Internet research, this model is supposedly based on the Seasonic SS-600ET platform (aka. Seasonic S12II Bronze): [url]https://www.jonnyguru.com/blog/2011/11/14/pc-power-cooling-silencer-mk-iii-600w-power-supply/4/[/url]...

Re: LG 60pz550 sound but no picture

Repaired the cracked solder joints on the Zsus board and reinstalled.

[CODE] Measured Panel Rating
Va 55.13 55
Vs 201.6 201
Vsc 149.0 150
Vy -177.6 -178
Vzb 105.7 110
M5V 5.166[/CODE]

I disconnected the LVDS cable and jumpered R51/R52 and confirmed I can display test patterns. It's not a perfect panel as there is a single black line showing on solid red and blue screens, but I digress.

With the jumper pulled, there is nothing on screen and I'm not hearing any audio...

Re: LG 60pz550 sound but no picture

Reviving an old thread since I just picked up the same model with similar symptoms. Sound but no picture. The seller informs me that the panel was working fine up until it went black screen, while retaining sound.

First thing I did when I got home was pull the Zsus. I've verified there are no shorts on any of the FGFP4633 IGBTs (all measuring 10kOhms), or blown fuses, or burnt resistors, just two cracked solder joints on two separate inductor coils.

My plan of attack is to simply reflow the coils, reinstall, and verify...

Re: Samsung HL67A750 DLP with bad caps!

Thanks for the reply LLLlllou!

I actually went ahead and purchased 2700uF FM series from Future Electronics since they were a good price. I didn't bother to replace any other caps.
Still need to source a reasonably priced 1910-6143W DMD since the one I replaced it with was no better than the original....bought used

Re: Samsung HL67A750 DLP with bad caps!

LLLlllou,

Thanks for your post. I have the same model RPTV and am now looking around for those FM 2700uF and FR 3300uF components. I recently replaced the DMD due to a few stuck mirrors and noticed three bulging WB series 2200uF caps on the sub power board while I had the back off the set.

I'm curious if you replaced any caps on the main power supply or just the SMPS?

Thanks!