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Equipment Repairs => CRT TV forum => Topic started by: caso on September 04, 2010,06:27:52

Title: TV SHARP 51GT-25S
Post by: caso on September 04, 2010,06:27:52

Good day

I have a problem whith the horizontal output on this TV set.

Because I haven´t the transístor BU508DFI, I used a copy (S2055N) but after 30 minutes, it fail down.

A friend tould me that in this model it is necessary to use the original taransístor BU508DFI,but I can´t foun it in my normal suppliers.

Could anyone give to me a tip about this problem?

Thanks in advance

Title: Re: TV SHARP 51GT-25S
Post by: sparky on September 04, 2010,07:31:56

hi
try charles hyde or wiltsgrove
sparky

Title: Re: TV SHARP 51GT-25S
Post by: Keith on September 04, 2010,09:01:26

Hi,

I'm not sure which chassis this one is! But S2055 should be OK, check the line drive waveform, could be a coupling capacitor in the BU508 base circuit or a line drive transistor or dry joints on the line drive transformer if it has one! Could also be a problem with high HT.

I hate Sharps!!!

Good luck

Keith

Title: Re: TV SHARP 51GT-25S
Post by: Turnip on September 04, 2010,13:18:26

Hi folks,

Could be wrong but seem to remember a cap decoupling the driver supply went high ESR and caused this problem.

Would like to say that 'Latter Day' Sharp tube sets were cool - they were total crap, as some financial folks thought that a PCB would handle heat like a metal heat sink,

They were wrong, but seems our new LCD sets have the same cost saving ideas -well, now, at least we have decent print through, and no lead.

Fitting new exhaust valve thingies to the classic though, to help with unleaded heat  - Chris.

Title: Re: TV SHARP 51GT-25S
Post by: sparky on September 04, 2010,13:42:05

hi
try c602 and c604 before fitting new
transistor
dave

Title: Re: TV SHARP 51GT-25S
Post by: Turnip on September 05, 2010,13:04:38

Hi Sparky,

Feel somewhat chastised as I couldn't be bothered to check - will do better, perhaps, at some point   - Chris

Title: Re: TV SHARP 51GT-25S
Post by: caso on September 20, 2010,06:59:09

Good Day

Thanks for your tips.

I changed the electrolitics from the secundary of main transformer and the transistor nevr burned anymore.
I Used a S2055N instead of the BU508DFI.

Title: Re: TV SHARP 51GT-25S
Post by: chrissie jones on September 20, 2010,07:58:01

check caps C602 C604 BOTH 220UF/10V.THEY ARE NORAMLY THE CAUSE.

Title: Re: TV SHARP 51GT-25S
Post by: Turnip on September 24, 2010,12:17:48

Hi Chrissy

Sparky said that 4th September  - he should be sainted, regularly  - worth a pound, Dave  ?  - Chris

Title: Re: TV SHARP 51GT-25S
Post by: csagor79 on December 14, 2010,06:20:03

in meinen Bericht über den Sharp 51GT-25S, möchte ich meine Erfahrung und Meinung veröffentlichen. Den Sharp 51GT-25S haben ich und meine Geschwister zu Weinachten 2001 bekommen und waren total glücklich darüber. Nach 3-4 Wochen, wenn wir Fernsehen guckten, kam ein schreckliches piepen aus dem Fernsehngerät. Dieses Piepen kommt häufiger vor, was sehr nervend ist und sehr schmerzt in den Ohren. Die Qualität des Bildes ist wohl ganz „OK“, worüber man nicht meckern kann. Ich habe ein kleines Inhaltsverzeichnis aufgebaut, damit man übersicht hat über den Bericht.



Glass Urns (http://www.breakdancedvd.com/index.php/member/7491/)

Title: Re: TV SHARP 51GT-25S
Post by: Turnip on December 14, 2010,12:06:11

Or perhaps,

A glass urn - Chris.

Title: Re: TV SHARP 51GT-25S
Post by: zuev-tv on January 06, 2011,09:29:43

 :oops:Oreginal BU508DFI (PHILIPS) не имеет резистора и диода . :wink1:

Title: Re: TV SHARP 51GT-25S
Post by: Turnip on January 06, 2011,13:27:34

Hi Zuev-tv,

Are you thanking or complaining - do R best - Quuq folks.