Electro Pcb Repair

 ARC Welding Machine Control Board This is a Welding Machine Control Card. Type ZX7200-01-A1 In this, we will describe the Functioning of the components and the connection of Pins. It is a simple control board that can be easily installed in any kind of welding machine either it is MOSFET based or IGBT based. control board repairing video This board operates with two ICs. 1.    UC3525-- It is a 16 pin Regulating Pulse Width Modulator. Its Oscillating range         is from 100Hz to 500 kHz. Input voltage 8V to 35V. There are many ways to use         this IC (UC3525) in different kinds of circuits but we will describe the way which is used in this circuit according to Pins.           Pin no. 2 and 16 are Vref pins.          Pin no. 1, 10, and 12 are grounded in this circuit.       Pin no. 3 and 4 are NC (not connected).        Pin no. 5, 6, and 7 are Oscillator pins.          Pin no. 8 is Soft-Start Pin but it is used for Overcurrent safety purposes.       Pin no. 9 is used for

  A  Washing Machine  is a widely used common home appliance all over the world. Fully automatic  Washing machines can detect an error in any part and show on the error code on the display.  The error codes are different for every brand.now we will explain an error about door lock in the IFB  washing machine  so first, we have to know about the wiring of the PCB. you can see in the picture  (figure A) there are three connectors for connections  There is a door switch connector that has four-wire and each wire has a different color.  Red, Black, Gray, Pink.  We have to deal with these colored wires except red wire. Like these, there are three pins in the door  lock switch.  Black wire --- Pin number 1 (Left side according to figure B) Gray wire  --- Pin number 2 (Right side) Pink wire   --- Pin number 3 (Centre) Figure A There are three terminals on the switch Figure B                                                                                                                       

Working on the door switch The door switch is an electronic and mechanical part. Or we can say that a combination of electronic and mechanical parts works as a  door switch. There is a one PTC indoor switch that operates on AC 230volts.  If PTC will get short then the door switch will get short and  it  will  also affect the functioning of P.C.B.  When any technician  replaces  the door switch but it doesn't work due to the malfunctioning of P.C.B. These types of faults usually occur in washing machines nowadays. Due to these washing machine's Display panel also shows Door lock error and the whole machine stops working. The technician usually changes the whole P.C.B when the machine  shows this type of error or fault. But these are repairable faults. We will talk about the fault in detail in the next blog. To be continued....... And when this PTC gets AC supply then it works as a heater and acts as  a power supply. It means when PTC gets heated then it cuts off the supply as it

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

IPM is the most important part of inverter-based things such as inverter air-condition, Refrigerator, Moter drive, On-grid solar inverter, Three-phase inverter, etc. IPM (Intelligent Power Module ) is a high-performance module that mounts a dedicated drive circuit for drawing greater performance from an IGBT chip, and it provides a custom IC IPM is a combination of IGBT    and bridge drive chip which is a vital compact electronics part for every compact thing like BLDC motors that are mostly used in all kinds of Refrigerators and Air conditioners. there are a lot of pins put on the Ipm and these pins assigned the various type of work such as Dc input voltage, AC output voltage, Input signal voltage, sensors signals, etc.

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

With the passage of time, everyone should get change. Everyone should get up to date to the new technology. Due to the advancement of technology, Analog circuit boards have been replaced by Digital circuits. In the Analog circuit, each IC was programmed for one function only. due to which detection of fault was easy by the technician. In today's advancement era, big circuit boards have been replaced by tiny ones that perform various kinds of functions at a time. Circuits made on the basis of new technology and advancement are not easy to understand by the technicians who are working for years. But they need to get trained for these. Technicians should gain knowledge about these from good tuitors who are expert in technology. .