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Equipment Repairs => LCD TV forum => Topic started by: Turnip on January 06, 2015,11:19:19

Title: Samsung LE32A457C1D - P/S problem, maybe.
Post by: Turnip on January 06, 2015,11:19:19

Hi Folks,

Have one in. It's an old set - circa 2007, where the PS BN44-00209A has the better glue that doesn't cremate, but looks as it's been a toaster for rather too long.

Suspect a cap problem at the very least, but thought before checking/replacing some dozens of 'em, would ask folks who have met one before, as I haven't.

Any thoughts ?  - Thanks - Chris.

PS - Wonder if search function on Quuq might be improved, as if problem isn't in the title, it can't easily be found.

Think 'Word' rather great, as can find most everything in any file - Forgot a Customer's Name ? find it in Address, or Fave name given to them for their peculiarities that always stick in the mind.

Title: Re: Samsung LE32A457C1D - P/S problem, maybe.
Post by: downunder on January 07, 2015,06:09:10

Hi Chris,

Won't presume to advise you as I never had the acquaintance of this model.

But just for the halibut, I've uploaded the PSU schematic to Samsung LCD service manuals.

Ever at your service, Bruce

Title: Re: Samsung LE32A457C1D - P/S problem, maybe.
Post by: watteau on January 07, 2015,06:56:39

Hi,
If the standby supply is lowish (4.9v) and pulsing, check the 22ufd 400v capacitor
(smoothing for the standby supply)
Regards,
John

Title: Re: Samsung LE32A457C1D - P/S problem, maybe.
Post by: Turnip on January 07, 2015,07:01:21

Hi Bruce,

Looked worse than it was - S/by Res cap CB852(1000/25) duff, and all 5 x 24v leads to inverter cremated due to dries on the socket pins. Natch' used a Wiltsgrove low ESR 1000/35 as have not yet had a failure with them, and cheapy caps don't last the guarantee.

Thanks - Chris.

PS - Thanks John, will add to my list but can't find it on the shematic for this model but suspect I've met it on another one - So Many BN44's to try sort.