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1.采用TA7680和TA7698的机芯彩电,如厦华XT—5102、熊猫BD47C4等,经常出现五彩色故障,在更换TA7698检查色通道外围元件无效的情况下,问题多出在TA7698(36)脚一扫描电路部分的同步电路的定时元件上,可用电烙铁给(36)脚的定时电容(厦华XT—5102为C237,熊猫BD47C4为C605)加热,若出现彩色,说明该电容已失效,应予以更换。 2.采用NP82C机芯的几种型号日立彩电,使用日久,常出现伴音小但无明显失真故障,多是伴音中频调谐回路L402失谐引起。可重新调整L402的磁芯,方法
1. The use of TA7680 and TA7698 movement color TV, such as Prima XT-5102, Panda BD47C4, often appear five-color fault, replace the TA7698 check color channel peripheral components invalid, the problem more in the TA7698 (36) feet A scan circuit part of the synchronization circuit timing components can be used to iron (36) feet of the timing capacitor (Xoceco XT-5102 to C237, Panda BD47C4 to C605) heating, if there is color, indicating that the capacitor has expired, Should be replaced. 2. NP82C movement using several models of Hitachi TV, the use of time, often accompanied by small but no obvious distortion failure, mostly sound intermediate frequency tuning loop L402 detuning caused. L402 core can be re-adjusted, methods