故障现象:图像正常,但无彩色、无伴音。检修:该机采用 I~2C 总线控制,采用三洋 GC3—A21机心,CPU 采用贴片式集成块,型号为6C3A/AVB967,小信号处理电路采用 LA76818A。查阅笔者电脑只有 CK21D50机总线数据,分析故障可能与 I~2C 总线有关,于是拆下机上的24C16存储器也将数据备份到电脑中(以便需时恢复),再将CK21D50机数据写入,装上后开机发现彩色和伴音都已恢复正常,但场幅、场线性不良,并且彩色偏色。翻 Symptoms: normal image, but no color, no sound. Maintenance: The machine uses I ~ 2C bus control, using Sanyo GC3-A21 movement, CPU patch integrated block, model 6C3A / AVB967, small signal processing circuit using LA76818A. Check the computer only CK21D50 machine bus data, analysis of the fault may be related to the I ~ 2C bus, then remove the machine 24C16 memory will also back up the data to the computer (in case of need to resume), then CK21D50 machine data is written, loaded After switching on the color and sound have been found to have returned to normal, but the field, field linearity, and color cast color. turn