Image without a primary colors, are the primary electron beam by tube. The electron beam as the reasons are: (1) at the end of the pipe, open collector voltage increases, the tube cathode voltage increases, thus electronic Cambodia as (2) at the end of the tube base and the decoding open circuit board color difference signal output end, depending on the tube base unbiased set at the end of the globe, so that the tube by electron beam. Red beam of the deadline, the image is lack of red component, should find the above circuits and components. cwyservice manual download site
(1) test put on board M801 red at the end of the tube collector voltage of 180 v, normal should be about 150 v, so the red beam tube cut-off. cwyservice manual download site
Redout. (2) test at the end of the pipe base voltage of 0 V, normal should be 7.2 V, that red out at the end of the pipe for the base and as unbiased. cwyservice manual download site
Decoding (3) test pieces IC501 24 feet of 0 v, 24 feet of peripheral and C521 no short circuit phenomenon. Internal short circuit and doubt IC501 24 feet. Fault elimination, following the new decoding block TA7193AP IC501 protection diode within 24 feet shot with short circuit or open circuit.cwyservice manual download site