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故障现象:电源指示灯亮,显示屏不亮,无图像、无伴音,所有功能失效。检修:开机,碟片不转。检测电源部分各路输出电压均正常,保险丝无熔断现象。仔细观察故障发现:有时开机后光头向里跑,到头不停,“吱吱”地打齿轮;有时开机后光头向外跑,到头也不停,“吱吱”地打齿轮。拔下CD机芯通向解压板的DATA、BCK、RLCK、地、16.9M的一组插座时,光头停止不动。怀疑滑行限位开关失效,重新清洗后,故障依旧。
Symptoms: power indicator light, the display is not bright, no images, no sound, all functions failed. Maintenance: boot, the disc does not turn. Detection of the power part of the output voltage is normal, fuse no fuse phenomenon. Careful observation of the fault found: Sometimes after the boot head run in the open, endless, “creak” hit the gear; sometimes run the bald run out after the start, at the end non-stop, “creak” hit the gear. Unplug the CD movement leads to decompression board DATA, BCK, RLCK, ground, 16.9M socket, the bald stop moving. Suspected taxi limit switch failure, re-cleaning, the fault still.