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红外遥控器出现遥控失灵的故障,一般是由以下3种原因造成的:(1)遥控器中的石英晶振损坏;(2)红外线发光二极管或驱动电路有故障;(3)红外遥控接收电路有故障。下面介绍判断故障原因的实用方法。 (1)把一只性能良好的红外接收二极管通过两根5～6m长的细导线与一袖珍AM收音机磁性天线的初级线圈并连起来,使收音机具有检测红外遥控信号的功能。检测时,在离收音机约3m远处,将待测遥控器的红外发射管靠近红外接收管的受光面,按动遥控器的功能键,若收音机发出“嘟嘟”声(此声响是红外遥控信号被接收管接收后经过光电转换变成电信号,再被收音机放大后产生的),说明遥控器红外发射正常,故障在于红外接收电路部分;若无“嘟嘟”声,说明遥控器有故障,红外发射电路元件或振荡电路有关元件损坏。
Infrared remote control appears remote failure, usually caused by the following three reasons: (1) the remote control quartz crystal damage; (2) infrared light-emitting diode or drive circuit failure; (3) infrared remote control receiver circuit has malfunction. The following describes the practical ways to determine the cause of the malfunction. (1) A good infrared receiver diode is connected to the primary coil of a miniature AM radio magnetic antenna through two 5 ~ 6m long thin wires to make the radio have the function of detecting infrared remote control signals. During the test, about 3m away from the radio, the infrared transmitter tube of the remote controller to be tested should be close to the light receiving surface of the infrared receiver tube. Pressing the function key of the remote controller, if the radio emits a “beep” sound (this sound is infrared remote control The signal is received by the receiving tube through the photoelectric conversion into electrical signals, and then amplified by the radio generated), indicating that the remote control infrared emission is normal, the fault lies in the infrared receiving circuit part; if there is no “beep” sound, indicating that the remote control is faulty , Infrared transmitting circuit components or components related to oscillation circuit damage.