Question about Hitachi 51F500 51" Rear Projection HDTV-Ready Television

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Hitachi 51F500 power supply?

Hi premtech,

I'm a radio engineer looking to fix my Hitachi 51F500. I think it may have some issues with the power supply after a possible lightning hit. When you plug it in - there are two relays that momentarily click on...and it keeps attempting to close these relays about every 2 seconds.
There are a few LEDs (rail voltage indicators?) that start to illuminate as well, but never turn on fully since the relays won't stay closed

I really want to fix this myself, and I'm willing to spend some quality time doing it.

Do you have any advice on where to get started with this set? I suppose being a lightning strike - it could be anywhere (and everywhere), but there is no obvious damage like I'm used to seeing.

Also, if you have any info on where to get parts and the service manual for this TV, that would be a TREMENDOUS help to me.

Thanks for your time and your contributions to this site.

- sixty_cycle

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  • Joe Kirklin Nov 11, 2008


    You are THE MAN! I owe you, buddy.



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  • 934 Answers

The fact that you're getting any action from the primary or secondary relays points to an open short in one or more circuits or a short to ground in one of the Hv load circuits and the S/D circuit is simply shutting the set off in protect mode... We see that a lot with PTV's when the convergence is fouled or the HOT or FBT is shorted or something along those lines.
I will Pando the service manual if you drop me a post to my addy specifying exactly what you need. If I remember correctly the manual for this one is actually a UWX20B with a supplemental.

William Rayburn, CET
Premium Technologies
PO Box 442
Long Beach, WA. 98631

Posted on Nov 10, 2008


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Posted on Jan 02, 2017


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