Hi,
After soldering all the parts of my DSO138 oscilloscope kit, everything seems to be working, after powering the board with 9,23V and touch the red clip with finger as mentioned in the user manual nothing is showing (No trace), I noticed that the switches doesn't working, after some troubleshooting i found the voltage is not correct at L3 (RF-choke) as showing in the next photo
the voltage at that point is -1.36v instead of 5v.
My problem is i can't found this part in the market, so can i short it or use something instead ?
Thanks in advance.
After soldering all the parts of my DSO138 oscilloscope kit, everything seems to be working, after powering the board with 9,23V and touch the red clip with finger as mentioned in the user manual nothing is showing (No trace), I noticed that the switches doesn't working, after some troubleshooting i found the voltage is not correct at L3 (RF-choke) as showing in the next photo
the voltage at that point is -1.36v instead of 5v.
My problem is i can't found this part in the market, so can i short it or use something instead ?
Thanks in advance.