Electrical Engineering - Re: Use of stepped sine wave UPS with SONY Bracia Flat Panel LCD

Author

Re: Use of stepped sine wave UPS with SONY Bracia Flat Panel LCD

James Sweet

2006-12-23, 8:25 pm

**THE-RFI-EMI-GUY** wrote:
> Hi;
> I have just bought a new Sony Bravia 46S2010 LCD TV. The operations
> manual warns against pulling the AC plug without first turning off the
> TV. - No problem, I would like to run the TV and my Pioneer 300 disc
> PD-F1007 Jukebox CD changer* from a UPS
>
> The UPS I am considering would be something like an APC Back-UPS 650,
> which are plentiful, easy to repair but have a stepped sinewave output.
>
> Can anyone tell me if there would be any reliability issues in running
> this setup? I know that there might be an AC hum issue with the sound
> system due to switching transients. I don't intend to back up my audio
> amplifier. I only want the TV and CD changer to ride out the numerous
> brownouts we get in Florida.
>
> (*The Pioneer must be on standby to retain memory and turns back on from
> standby on power interruptions).
>

When I lost power in the big windstorm last week it was in the middle of
my weekly movie night gathering. I hooked the RPTV, reciever and DVD
player to a cheap inverter connected to the car and we watched the rest
of the movie and another one after that. I noticed no difference in
performance at all, the only effect was the 60Hz power transformer in
the reciever emitted a buzzing sound, the sound from the speakers was
clean as always.

Computers run fine off cheap UPS's and inverters and most modern
equipment has very similar switchmode power supplies. Give it a try, but
chances are it'll work just fine.

**THE-RFI-EMI-GUY**

2006-12-24, 3:25 am

Thanks !

James Sweet wrote:

> **THE-RFI-EMI-GUY** wrote:
>
>
>
> When I lost power in the big windstorm last week it was in the middle
> of my weekly movie night gathering. I hooked the RPTV, reciever and
> DVD player to a cheap inverter connected to the car and we watched the
> rest of the movie and another one after that. I noticed no difference
> in performance at all, the only effect was the 60Hz power transformer
> in the reciever emitted a buzzing sound, the sound from the speakers
> was clean as always.
>
> Computers run fine off cheap UPS's and inverters and most modern
> equipment has very similar switchmode power supplies. Give it a try,
> but chances are it'll work just fine.

Thanks!

--
Joe Leikhim K4SAT
"The RFI-EMI-GUY"©

"Treason doth never prosper: what's the reason?
For if it prosper, none dare call it treason."

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