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Thomson tv chasses tx91 ps dead

 
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gruber
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PostPosted: Tue Aug 07, 2007 11:05 am    Post subject: Thomson tv chasses tx91 ps dead Reply with quote

Hi all!

I have a tv to tepair, but I can't solve the problem.
The ps doesn't work at all. I have already changed the Ic (TEA2261) and caps. Diódes and resistors are good. On secunder side there isn't any short. 300 volts is ok. Everything seems to be good, but the ps doesn't work at all. If you know this problem please help. Thanks. Márton
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grubma
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PostPosted: Tue Aug 07, 2007 6:26 pm    Post subject: Re: Thomson tv chasses tx91 ps dead Reply with quote

(51MT11X) I've solved the problem. C14 470uF/25V
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ibut
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PostPosted: Fri Jun 19, 2009 6:48 pm    Post subject: thomson tv tx91 can't wake up from standby mode Reply with quote

Hi all,

I've problem about thomson tv tx91, can't wake up from standby mode.
do need to change IC ST9293? please anyone give advise!!!

Thanks, ibut
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torbjorn



Joined: 07 Jun 2007
Posts: 370
Location: Sweden

PostPosted: Mon Jun 22, 2009 12:29 pm    Post subject: Reply with quote

If the tv has a membrane-style keyboard on the front panel, try disconnecting it and then switch it on by the remote. It is very common on those membrane keyboards of Thomson sets, that they get leaky across one or more switches, and this can cause the microcontroller to lock up.

A common power supply problem in many Thomson chassis is that there are some wire jumpers below the supply transformer, those jumpers can get displaced and cause shorts to the transformer pins, sometimes causing very strange symptoms.
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