Everything was going fine with soldering the DSO SHELL when I did one fatal mistake. I did not test the output voltage of the brand new 9V power supply I had bought the previous day. I measured the voltage control points and they were not far from the expected values. So I continued to next step for the adjustment of C3 and C5, where I did not get the correct signal. But after two minutes not being able to adjust the capacitor, I check again the previous step and then I discovered bad voltage values. This time, I measured the power supply to find I was feeding 16.5 V to the DSO and made it die...
Now, I've replaced the faulty power supply by a regulated one that outputs a steady 9.2 V. But I think that some parts of the kit have died. The digital card seems to work correctly: the DSO boots and buttons seems still active. But it seems that the analog card has some components dead. Can I resuscitate the DSO if I buy a replacement analog card? What would be step to heal that kit?
- Input: 9.16 V
V+: 8.21 V
AV+: 5.69 V
V-: 0.18 V
AV-: 0.65 V
V1: 2.08 V
V2: 5.13 V
V3: 2.93 V
V4: 3.94 V
V5: 3.80 V
Lesson learnt: don't trust stickers and data sheets; always test!