Power supply dso5102p

tershel

Hello, I measured the voltage at the output of the power supply when it is connected to the circuit Board of the oscilloscope and when it is disconnected from the circuit Board of the oscilloscope. in both cases, the output voltage changes abruptly from 0 to the required voltage, and again decrease to 0 and the process is repeated. Unfortunately now I can not capture video. When replacing the PWM chip, the power supply can make, but cannot work for a long time 30-40 minutes, and again the voltage starts to change from 0 to the required value and then disappears.

amy

Sir, please measure the voltages of the power supply as the picture to judge whether the power fault.

tershel

T1G/136012984

amy

Sir, please give me the serial number of your scope.