Question about Zenith C32A26 32" TV

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C32A26 crt TV; No audio or video

I removed the back housing, disconnected the speakers, and slid the circuitboard out in an attempt to pinpoint a faint clicking noise the tv made when plugged in. The 120vAC hot side connects to the board, to what I think is called a transformer (tx?), then to a 12vDC black box gizmo. the clicking noise is eminating from the tx. Does this indicate that it is bad, or is there some way to test it with a VOM? Its been well over twenty years since ive had any electronics training, and technology has changed alot, but 120vAC still bites just like it used to, lol. any advise or info about how to proceed is much appreciated. Thanks.

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Mmm this is tricky - there is no normal transformer power supply in a tv. They usually just rectify the supply and regulate it for the circuits, and use voltage doublers and a transformer to get the EHT. Be carful the voltages can be 20,000volts! Check all the capacitors. The EHT flyback transformer can arc and present a clicking sound. Make sure everything is clean.

Posted on May 12, 2009


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