Precautions for using voice remote control:
Voice remote control cannot increase the performance of the equipment. For example, there is no wind direction display on the air conditioner, and the wind direction key of the remote control is invalid. Please note that the whole machine with built-in dongle mode should not be connected with an external dongle.
The remote controller is a low-consumption product. Under normal circumstances, the battery life is 6- 12 months. If the battery life is shortened due to improper use, two batteries should be replaced together. Do not mix old and new batteries or batteries of different models.
To ensure the electrical connector to work normally, the remote controller is useful. If the battery leaks, the battery box must be cleaned and replaced with a new battery. In order to prevent leakage, the battery should be taken out when it is not used for a long time.
Determination of fault location of remote control receiver;
Once it is determined that the remote control receiving circuit is not working properly, the fault can be distinguished from which part of the circuit, that is, from the high amplifier stage, the super-upgrade circuit or the amplification and shaping circuit, in the following ways.
When checking 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 no signal is detected, the fault is before the super boost circuit: when checking the amplification and shaping circuit, the pin voltage of LM358 can be measured and compared with the normal value. If it is abnormal, it is mostly the damage of the integrated circuit itself.