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故障现象16:左、右声道音量不平衡。故障原因:音量控制电路N801损坏。更换N801。故障现象17:接收3.58NTSC制式信号时,不显示制式字符。故障原因:该机制式识别电路VD605不良。更换VD605。故障现象18:无字符显示。
Symptom 16: left and right channel volume is not balanced. Fault reason: The volume control circuit N801 is damaged. Replace N801. Symptom 17: When receiving 3.58NTSC signal, the system does not display the standard characters. Fault reason: The mechanism identification circuit VD605 bad. Replace VD605. Symptom 18: no character display.