The model is a bus control circuit complexity, the inspection is part of a three-terminal regulator blocks supply of IC805 (AN7809-LB) the input current limiting resistor R842 resistance increases, the input voltage IC805 reduced to about 8V, Output voltage dropped to about 7V year. 8842 Icon resistance is 4.7Ω/5W (some icons is 2.7Ω/3W), when a failure occurs, R842 resistance becomes more than a dozen to a dozen European range, the greater the resistance the more serious faults. After replacing the resistor with the same specifications, troubleshooting. R842 is the analysis of changes in value of long-term heat resistance caused serious because R842 following printing plate has become yellow and black.3zUservice manual download site

     After IC805 regulated output voltage of 9V chroma signal decoding, horizontal and vertical scanning manifold IC601 (TAl215AN) power supply, but also for the baseband 1H delay line IC603 (TA8772AN) power supply voltage is too low because it can not work properly, resulting in the class failure.3zUservice manual download site