TV Repair Questions? Ask a TV Technician for Answers ASAP
What I really need is the schemetic diagram of the TV. Having been in the TV repair business years ago but after I retired I auctioned off all my instruments and tech data but I still know how to diagnos problems. I isolated the problem using the TV ears that I use when viewing TV. They plug into the audio output port on the TV. The problem does not appear on the headset but does occur in the downstream portion of the circuitry that drive sthe speakers. Schematics (SAMS) are very difficult to obtain these days since SAMS photofacts are not any longer available. The problem could be a bad solder connnection of some part since the TV plays normally after about 15 minutes of the intermittent noises. Where can I get a schematic?
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You can order the service manual from here
Also replace Capacitor C926 with a 1000uF 50V as this is a common failure point on your model.