Electro Pcb Repair

This is an IFB Top-load washing machine control panel it has an AC low error. This is a power error that the input line has low voltage but in reality, the voltage is correct into line.  So we will repair the PCB  fix error ac low  Now we have to check those resistances that take signals from the input line and delivered on the main microcontroller IC.  That kind of resistances is 100 kilo-ohms above to up and we can find easy into the circuit you are seeing in figure 2.  There is a resistance R1 560k. This resistance is a very important play role in the circuit  R1 is a calibration resistance for line in voltages if the resistance will be increased.  then show the error on display  AC HIGH  if the resistance value decreases then show an error on the display AC HIGH.   without a pressure sensor, we cannot check the PCB for all functions so we have to attach the pressure sensor with PCB. You are seeing  in figure 2 In most of the cases, R1(560K) is open. By replacing the resistance the

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

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