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Showing posts from August 9, 2020

LG Split AC PCB Repair

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PCB-Printed Circuit Board. PCB mainly consists of Microcontroller which we can say that it is the brain of the circuit without this the circuit is incomplete. Microcontroller and other components of PCB combine forms a Circuit in which Microcontroller operates all functions. The Microcontroller (mn101ef31gxw) is a programmable IC(Integrated Circuit) which can be programmed to operate any kind of machine. One more IC called EEPROM(24c04) also works with it.  Other than these PCB need power like 5volt to operate microcontroller and 12volt for other components like Relay, etc.  Mostly the problem that comes in LG Air Conditioner PCB is power supply related. The SMPS power supply becomes faulty due to fluctuation of light and other some reasons.  Other than this power supply problem, the EEPROM IC problem also comes in the PCB. Due to this IC problem, sometimes it does not ERROR on display and the PCB also not works. When the IC becomes faulty, then the technician also faces some problem r