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故障现象:枕形失真,屏幕两边向中间收缩成“喇叭”状。分析与检修:该机枕形校正电路用的是TDA8145,其各脚功能及正常电压如下:rq脚同相输入(16V),!“脚反相输入端(1.6V),#”脚参考电压端(8.2V),“$脚接地(0V),”%脚场频抛物线波输出端(9.4V),“脚电源(26V),”’脚负反馈输入端(14.6V
Symptoms: pincushion distortion, both sides of the screen shrink to the middle of the “horn” shape. Analysis and Maintenance: The aircraft pincushion correction circuit is used TDA8145, the function of each pin and the normal voltage as follows: rq pin in-phase input (16V),! "Pin inverting input Voltage feet (8.2V), ground pin (0V), ground pin parabolic wave output (9.4V), feet power supply (26V), feet negative feedback input