Fault 1: All the keys of Wholesale universal door remote control products do not work.
Analysis and repair: Most of the reasons why all the buttons on the remote control do not work are due to damage to the crystal oscillator. If it has been dropped or checked with the radio and there is no "beep" sound at all, you can directly replace the crystal oscillator with a new one.
Fault 2: Individual buttons of Wholesale universal door remote control products do not work.
Analysis and maintenance: This phenomenon shows that the remote control is normal as a whole, and the reason why some buttons do not work is that the contacts of the button circuit cannot be effectively conducted. Most of the contacts on the circuit board in the remote control have dirt, which increases the contact resistance or cannot be connected. You can use cotton dipped in absolute alcohol to wipe the carbon film contacts, but not too hard to prevent the carbon film layer from wearing or falling off. . Aged or worn conductive rubber can also cause individual keys to fail.
Fault 3: The remote control distance of Wholesale universal door remote control products is relatively short.
Analysis and maintenance: First of all, it should be judged whether the remote control receiving circuit is working normally, and it can be compared with the test machine of the remote control of the same brand and specification.
Fault 4: Wholesale universal door remote control products Press any button to execute a certain function.
Analysis and repair: Usually it is caused by leakage or short circuit between interdigital contacts or leads at the keys that perform a certain function on the circuit board.