Rei Hashimoto

I just found out the cause of failure. Please see the picture. Yello : C217, Blue : D7, Anode. The anode waveform seems to be ok. It comes switching. However, AVCCC-5V is wrong. And I checked L5. L5 is completely opened. L5 might be damaged. It should be replacement. I would like to say "Thank you for your help."

Hi, Attila, Thank you for your advice. Here is good news. I removed FB6, 7 and 16. SC and AWG are well with External -5V regulator. It means that the issue is only negative supply. By the way, The positive supply,5V5 is no problem. On the other hands, AVCC-5V5 is still 0V. The negative supply is generated by ADP1612. Inverted pulse provide from ADP1612 SW pin. And it is only chopping for getting -5V5. D7 and C217 are good. I don't know what's happen on simple circuit. Do you have any advice?

Hello, My name is Rei. I am using Analog Discovery (Black one). Recently, I noticed Scope feature couldn’t work. The calibration was failure also. It showed following error message; “Check the connection!!” However, the connection is correct. AWG is failure too. Negative is saturated on the waveform. I think the hardware is broken. Please see the picture. Here is supply voltage; AVCC5V0 : 4.401V AVCC-5V5 :1.289V AVCC5V5 : 5.502V AVCC3V3 : 3.308V AVCC-3V3 :-3.278V AVCC-5V5 and AVCC5V5 are strange. For checking failure device, the power rail should be separated from analog block. After that, external tracking +/-5V will provide to analog. Could you please let me know where is jumper. And if you have any advice, please send it also.