The remote controller adjusts the splicing screen and presses the setting key of the universal remote controller until the indicator light is always on and flashing, indicating that the remote controller has been coded with the TV. When you see the volume icon on the TV, let go immediately, and the configuration is successful. Press the function key of the remote control to use.
Determination of fault location of remote control receiver;
Once the remote control receiver determines that the remote control receiver circuit is not working normally, it can distinguish which part of the circuit the fault comes from, that is, from the high amplifier stage, the super-upgrade circuit or the amplification and shaping circuit.
When the far-end receiver checks the amplification and shaping circuit, the input/output point of the signal is the key point to find the fault. The specific method is to use the remote controller to transmit signals, and use an oscilloscope to observe whether there is any signal input in the amplification and shaping circuit (such as pin ⑤ of LM385F). If there is a signal waveform, it shows that the high amplifier circuit and the super booster circuit are basically normal, and the fault lies in the amplification and shaping circuit.
If the remote receiver can't detect the signal, the fault is before the super booster circuit: the pin voltage of LM358 can be measured by checking the amplification and shaping circuit and compared with the normal value. If it is abnormal, it is mostly the damage of the integrated circuit itself.