Question about JVC AV-27720 27" TV
First, a little background. This TV worked fine until cats used the TV top case as a launching point. The screen would compress, then it finally went to just a horizontal white line in the center. Note that before it went completely bad, I could press on the top case and cause the picture to go back to full size.
Upon disassembly, I noticed that the only thing the top case was pressing on was a grey cable that is routed around the picture tube and is terminated into a 2 pin connector on the main PCB. The cable does have creases where the case was pressing. If I disconnect the cable, nothing changes.
I'm an old electronics tech (i.e. rusty), and I don't have schematics. I can perform basic AC/DC voltage tests, but don't have a signal tester/Oscope.
I'd hate to throw this TV out! Can you provide any insights or instructions on how to troubleshoot?
In most cases the following parts need to be replaced I think the part location numbers are accurate
IC421 LA7832 ( vertical output IC )
Capacitor C424 100UF @35v
Zener Diode D422 MTZJ75-T2
Resistor R541 1.8ohm 2watts
Posted on Mar 12, 2009
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Posted on Jan 02, 2017
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