Hello everyone 
This is my first post here. I have problem with my 48v 1000W controller. It's stop working. I open it and I made some measurements. I found one shorted diode which I replace but this don't fix the problem. I also noticed that the three big resistors are very hot I can't touch them after minute work, they provide voltage for the voltage regulator 78L05. At the input side of the voltage regulator there is 5.6v , at the output side there is exact 4 volts. So input voltage is too low. I desolder the voltage regulator and the input voltage increases significant to 18v. I also replace the regulator with new one 1A version but without success. After that I replace the op amp chip LM324, but the voltage at the output of the 7805 was still was 4V . I also check all mosfet's transistors all diodes and replaced most of the capacitors. At the end I desolder the BLDC controller I guess marked as 0C062 B2FL and then the voltage at output of the 7805 became normal 5V. So I believe that this chip is damaged 0C062 B2FL. Is there way to fix this controller. Can I use external MCU like PIC ATMEL Arduino to control mosfet's . There is marks on the PCB around the 0C062 B2FL chip - AH AL BH BL CH CL which are control signals for the motor. Or I just have to buy new controller. Do I have to made some more measurements ? The controller model is TDK-2W Changzhou City Tongde Electric Appliance Equipment co., Ltd
Thank you !
This is my first post here. I have problem with my 48v 1000W controller. It's stop working. I open it and I made some measurements. I found one shorted diode which I replace but this don't fix the problem. I also noticed that the three big resistors are very hot I can't touch them after minute work, they provide voltage for the voltage regulator 78L05. At the input side of the voltage regulator there is 5.6v , at the output side there is exact 4 volts. So input voltage is too low. I desolder the voltage regulator and the input voltage increases significant to 18v. I also replace the regulator with new one 1A version but without success. After that I replace the op amp chip LM324, but the voltage at the output of the 7805 was still was 4V . I also check all mosfet's transistors all diodes and replaced most of the capacitors. At the end I desolder the BLDC controller I guess marked as 0C062 B2FL and then the voltage at output of the 7805 became normal 5V. So I believe that this chip is damaged 0C062 B2FL. Is there way to fix this controller. Can I use external MCU like PIC ATMEL Arduino to control mosfet's . There is marks on the PCB around the 0C062 B2FL chip - AH AL BH BL CH CL which are control signals for the motor. Or I just have to buy new controller. Do I have to made some more measurements ? The controller model is TDK-2W Changzhou City Tongde Electric Appliance Equipment co., LtdThank you !
