Incorrect voltage level readings with all signals

Incorrect voltage level readings with all signals

Postby BartPcb » Fri May 31, 2019 9:16 pm

Hi there,

I'm having some troubles getting my DSO150 kit to work (official kit). I'm not sure if the kit is just broken or if my soldering is bad.
  • I checked all resistors for their values and those were correct.
  • I used both a 9V battery and a 9 volt DC supply.
  • I did multiple VPOS alignments.
  • I checked SENSEL0 - SENSEL3 readings according to the troubleshooting topic.
  • I also checked AV+ and AV- and the other voltage reference points.

All readings were correct and in their acceptable ranges.
I'm a bit out of ideas and disappointed this shell is so hard to get working.
The only times the signal seems to change is when I change the resolution from 0.2V/div to 0.5/div. I.E. all voltage divisions > 0.5V look the same as 0.5V and all < 0.2V look the same as 0.2V. My rotary encoder is also not working very well, I need to push it a bit in for it to work properly. I have attached some pictures of my test signal, I hope someone can point me into the right direction. If you need anymore information please let me know.

0.1V test signal on 0.2V/div
Image

0.1V test signal on 0.5V/div
Image

Back of my PCB including PID sticker
Image

Bootup screen
Image
BartPcb
 
Posts: 2
Joined: Mon May 27, 2019 8:19 pm

Re: Incorrect voltage level readings with all signals

Postby BartPcb » Sat Jun 01, 2019 2:35 pm

Turns out my soldering was bad on one of the male header pins that connects the analog board to the main board, fixed it now.
BartPcb
 
Posts: 2
Joined: Mon May 27, 2019 8:19 pm


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