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Darryl
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 Posted: Tue Oct 02, 2007 10:55 am Post subject: GE 31GT740 - High pitch squeel |
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This set just came in and I dont have the manual. It makes the high pitch squeel as soon as you plug it in. That leads me to think something in the secondary of the power supply tranformer is loading it down. Any service info online or any tips?
Appreciate any info on this one. |
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John
Guest
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| Posted: Tue Oct 02, 2007 10:55 am Post subject: |
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Dave, sounds like the Horz. output transistor is shorted account of a bad
Flyback. |
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Eric
Guest
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| Posted: Tue Oct 02, 2007 10:55 am Post subject: |
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| Daryl check the hot it maybe shorted then post again..Eric |
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Darryl
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| Posted: Tue Oct 02, 2007 10:56 am Post subject: |
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Eric and John Thanks!!
Yes the HOT was shorted...Replaced and now no squeel. But when turned on, Hi
voltage comes up momentarily then goes in protection shutdown and
re-attemps to turn on. Repeating the same cycle three more times on its own.
Is the flyback a gonner? Or is some other part the problem? CTC203CA12 is
the chassis. Eric, I see you were going to post the service manual. It would
be helpful to have. Well thanks... any other info
would be a major help. |
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John
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| Posted: Tue Oct 02, 2007 10:56 am Post subject: |
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Darryl,Yes the flybacks gone, and if not careful will take out the New HOT
that you just put in. |
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Terry
Guest
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| Posted: Tue Oct 02, 2007 10:56 am Post subject: |
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Dave resolder the pins of the SMPS xfmr. also check and resolder the leads
to the small coil to the horiz. drive xfmr. |
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