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Sony CTV KV-2966AS

 
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jasonczapor
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PostPosted: Mon Jan 21, 2008 12:07 pm    Post subject: Sony CTV KV-2966AS Reply with quote

Sony CTV was squealing, replaced flyback tx, now the sets no go at all.
I have no schmatic and the circuit is filled with dust which is making it
difficult to service. Any suggestions to get it running?
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TV Family Guy
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PostPosted: Thu Jan 24, 2008 4:30 am    Post subject: Never just a flyback Reply with quote

If indeed your flyback transformer was fried, it usually takes the horizontal output transistor with it. Did you check this as you were checking the set out?
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jasonczapor
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PostPosted: Tue Jan 29, 2008 7:17 am    Post subject: Sony CTV KV-2966AS - Horz output Reply with quote

Is the horz out Ic601? (STR-S5741), or would it be Q801 (H-drive)?
It's been a few yrs since I worked on a tv. I now have a schematic of the set. I've replaced IC601, but now at turn on it make a whining noise, not a high pitch like before. Is there some caps or resistor values I should check around the IC before turning on again?
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Gravityboots



Joined: 09 Jan 2008
Posts: 38

PostPosted: Tue Jan 29, 2008 3:51 pm    Post subject: Verify Reply with quote

Yes, you must test the horizontal output transistor any time changing a flyback becomes necessary. If shorted, replace.
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jasonczapor
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PostPosted: Mon Feb 04, 2008 6:25 am    Post subject: Sony CTV KV-2966AS - Horz output Reply with quote

Yep the Horz o/p was shorted. Was a prick to get to. Anyway so far I have replaced with new the flyback tx, horz output and IC601 in the power supply. The set still won't startup and is still making a whining sort of noise. I don't know if it's just a few caps need changing, but I'm stuck at the moment. Anything you recommend checking next?
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Gravityboots



Joined: 09 Jan 2008
Posts: 38

PostPosted: Mon Feb 04, 2008 2:50 pm    Post subject: Now look for Reply with quote

Good, now we have to check our diodes and caps in the power supply and we should be golden. Nobody said TV repair was easy all the time.
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