Hi just a posting were are fixing a 50 inch LCD TV. We found that the back-light LED was open, the left side of the LED strip behind the LCD had a bad LED. we tested the diver board and it was okay at 380 volts. The student learned how to troubleshoot high voltage power supplies safely, yes I did get a shock. Even with years of experience I get it once in a while, the important thing is keep one hand in your pocket while probing around high voltage, it can save your life.
Wednesday, November 7, 2018
Today we can across a Catastrophic failure of one of the FlashForge 3D Printers. The seniors (12th grade) students took it apart to find what the issues was. Unfortunately the head to the printer is beyond repair, another has been ordered and should be here in about one to two month. It was a great teaching point, we when over how plastic injectors worked and PID temperature controllers. We are going to make mechanical drawing in Solidworks and machine our own nozzles so we can have spares on hand.