one
First, open the old remote control, check the \"chip model\" and crystal frequency; One of the most critical is frequency. Open the original remote control to see the shock resistance value. Buy a new remote control with the same resistance value, and adjust the short route of the new remote control according to the short route welding method on the back of the original remote control circuit board.
two
Press the two buttons of the remote control on and off (the top row) at the same time. If the indicator blinks quickly after about 2 seconds, it indicates that the remote control is cleared successfully. Note: The light should keep flashing. After the code is cleared, press any key and the light will flash and go out.
three
After clearing, press the four key lights of the remote control to flash and then extinguish.
four
Take the old remote control that can be used in the left hand, and take the new remote control that is ready to copy in the right hand, the two remote controls are close together, and press and hold the corresponding \"open the door key\" or \"rise key\" of the two remote controls, and see the new remote control light keeps flashing, which means that the key is copied successfully. Note: When copying, if the light does not flash, you can change the position, such as the head of the two remote controls to the copy to try, you can change several positions to try.
There is a wireless receiver module on the receiver, if it is a superheterodyne receiver module, it is generally 433M. If it is superregenerative, it is hard to say, it may be 315, it may be 433, 418, 430.
If you have the original remote control, turn it on, and the number on the crystal oscillator is the frequency.