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例1 万利达N980型DVD,重放时有伴音、无图像。经查BT864(10)脚无视频输出,判定BT864内部不良,换新后,故障排除。例2 万利达N996型DVD,进出盒速度慢,也不读盘。用万用表测电源板机芯供电接插件CN4的各种输出电压,发现5V电压输出仅2.6V左右,再测整流管D6的负端电压,仅有4V左右,怀疑整流二极管D6
Example 1 Malata N980 DVD, playback with sound, no images. The investigation BT864 (10) feet without video output, to determine BT864 internal defects, after the new, troubleshooting. Example 2 Malata N996 DVD, out of the box slow, do not read the disc. Using a multimeter to measure the power supply circuit board core power supply connector CN4 various output voltage and found 5V voltage output of only about 2.6V, and then test the negative terminal voltage rectifier D6, only 4V or so, suspected rectifier diode D6