Microwave oven Repair with clicking On/off symptoms. Model LG

gme esr meter

A customer brought his microwave oven for repair. It was not a heating issue but it was something strange that I have not seen it happen in any microwave oven. It was a challenge so let get started.

lg microwave oven repair

The moment I powered up the device, it shows that is on but the moment I open the door, I could hear a relay clicking and the light in the microwave oven goes on and off. If I continue with the heating process, it would heat fine but the clicking noise and light going on and off bothered the customer. Read More

Shorted IGBT On A Welding Machine Replaced

shorted igbt welding machine

A guy called me urgently about his welding machine. He said that it stopped working because the welding technician by mistakes bumped into it causing to stop working. I always listen to the customer but I usually do my own checking later on.

shorted igbt

The moment I powered up the machine, I saw this right away which is a common fault in this kind of machines. The overheat LED light comes on due to many reasons. Read More

Bad DC Motor In Sony Hi-Fi

bad dc motor in hifi

sony hifi tray not open

This Sony Hi-Fi came in for repair with the complaint of tray can’t be opened even though the front button already been pressed. The display showed open mode but there was no movement from the tray. I opened the cover and head straight to the connector to check on the voltages. All the signals were printed on the circuit board which was easy for me to perform the voltage testing. Read More