I would contact an authorized repair centre for JVC and ask if they have them for sale or will copy one for you. First ask if you can buy them, since schematics are rarely free these days and an offer to pay for it will make you look better and will make them more liable to help - nobody's time is free. Few companies provide such information, as they did in the 'old days' by gluing a circuit diagram on the inside back cover of the television cabinet. They were useful when televisions had more than one tube. However, companies no longer make a habit of making such information readily available, because most modern electronics are difficult to diagnose by consumers and contain many parts that are not considered serviceable - swapping boards is not the same as replacing components. There is also an issue of liability in the event a consumer gets a jolt off the tube's high-tension lead or from something else in the box [*1]. Failing a service centre, I would send an e-mail to JVC's customer service on their website and see if they can accomodate you. The worst that can happen is they ignore the e-mail. [*1] Those idiots who give fellow idiots millions of dollars because a cup of hot coffee did not have a warning that the cup contained something hot should be the first against the wall come the revolution, to borrow a phrase.