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例1 故障现象:进碟后不选节目。NORMAL/KARAOKE开关位于KARAOKE位置时,显示屏出现“O”而无别的显示,这里仅OPEN键工作,其他功能失效。分析检修:当“O”显示时,通常是机器自保护,可能是操作不当,碟未放好。这时可将电源插头从插座中拔出又再插入,若工作恢复正常,证明机器良好。如果还显示“O”,除OPEN键其他键失效,也无其他显示,
Example 1 Symptom: Into the dish after the election program. When the NORMAL / KARAOKE switch is in the KARAOKE position, the display shows “O” without any other display. Only the OPEN button will work here. Other functions will be disabled. Analysis and maintenance: When the “O” is displayed, usually the machine is self-protection, may be improper operation, the disc is not put. At this moment, you can unplug the power plug from the socket and insert it again. If the work is normal, prove that the machine is good. If “O” is also displayed, the other keys except the OPEN key will expire and nothing else will be displayed.