Vizio VO320E Bad Power Supply Board?

[alja]

Re: Vizio VO320E Bad Power Supply Board?

Thank very much Tom, I really appreciate your time and patience, I will post results once I get the new one in.

Again,

Thanks

[alja]

Re: Vizio VO320E Bad Power Supply Board?

I just pulled out the diode and the reference is MUR460 / 937 but I cannot find the 937 is there any way to replace it how can I choose the correct one?

And off course you were right, after pulling out the diode I test the other one and gave me 425

[Caleb]

Re: Vizio VO320E Bad Power Supply Board?

I think you just need the first portion MUR460. Datasheet attached below

[alja]

Re: Vizio VO320E Bad Power Supply Board?

Thanks Caleb, you are right I found that the second number has to do with the manufactured date. Ordering ......;-)

[alja]

Re: Vizio VO320E Bad Power Supply Board?

Just for reference...., I got the diode, replaced it and is working good!

thanks

[tom66]

Re: Vizio VO320E Bad Power Supply Board?

Fantastic to hear! Thanks for the feedback.

[Ashroyer05]

Re: Vizio VO320E Bad Power Supply Board?

It's cool to see this posting. I have the same problem with my vizio vl320m. I went over the power supply the other night and found a bad diode, the same one under the heat sink. I will order and hopefully I will get the expected voltages. I found that before seeing this posting, but this posting serves as a confirmation. This site is a great tool!

[inflitedan]

Re: Vizio VO320E Bad Power Supply Board?

I also have this same Vizio VO320E power supply (DPS-172EP) that has me a bit stumped. No output on any rails. Not even on the +5vSB. Main fuse is good. All caps are good. Initially, I found 2 bad MOSFET’s (Q700 & Q708) I replaced them and still no power anywhere. I followed this post up to #28. As suggested I checked the DC voltage across C802, it’s 180vdc. Reading on to post #30, the voltage across C903 is alternating between 9 and 13vdc. Post #36… Diodes D802 & D803 seem to be OK. Thoughts?