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有一台长虹 C2141遥控彩电,用户反映,必须将遥控板靠近电视机,距离小于33厘米,对准遥控窗,电视机方能受控。被多次送修,均未查出故障原因。先怀疑遥控板输出的控制信号弱,测电池电压,均为1.5V.用电流档2.5A 测电池的瞬间短路电流,均在1.2A 以上,说明电池能量充足;在5米以外对准调幅收音机,按动任一遥控按键,收音机均可收到“哒哒哒”的声音,这说明遥控板故障可能性不大。打开电视机,取出遥控接收器,用万用表测接收器输出端电压,让另一人在5米以外操作遥控板,当按键压下时,该电压在4.5V 左右,且有微微摆动,只是电视机不受控,这说明遥控
There Changhong C2141 remote color TV, the user reflects the remote control panel must be close to the TV, distance less than 33 cm, aimed at the remote control window, the TV can only be controlled. Was repeatedly repair, did not find the cause of the malfunction. First suspected remote control panel output control signal is weak, measuring the battery voltage, are 1.5V. With the current file 2.5A test battery instantaneous short-circuit current, are more than 1.2A, indicating sufficient battery power; at 5 meters away from the AM radio , Press any remote control button, the radio can receive “da da da ” sound, indicating that remote control board failure is unlikely. Turn on the TV, remove the remote control receiver, measure the output voltage of the receiver with a multimeter, let another person operate the remote control board 5 meters away, when the button is depressed, the voltage is about 4.5V, and there is a slight swing, but the TV Uncontrolled, this shows remote control