Hello,
I read on log file :
Calibration results:
CH1 offset at 2V/div : 179 FAIL
Rounds : 51
CH1 offset at 1V/div : 22 OK
Rounds : 18
CH1 Y-position low, CH1_DAC1 0 83
Rounds : 51
CH1 Y-position mid, CH1_DAC0 103 179
Rounds : 51
CH1 Y-position high, CH1_DAC2 189 255
Rounds : 32
Can you help me ? Thanks
Hello @Jean-Marie
After searching on the forum EDU09
could be some bad soldering or a bad inserted IC …
like in this topics :
https://forumtest.whadda.com/t/calibration-failure-edu09/28283
https://forumtest.whadda.com/t/calibration-failed-179-56/29455
So do you have already check your soldering and IC orientation ?
You could also post some sharp photos of the PCB, the issue is maybe visible for some expert eyes on this forum.
Hopping this help !
Have a good day.
Hello again !
I just have a quick look at the photo, nothing clearly wrong … hard to tell without a view of the other side … and the curent view angle lets some components hidden …
And also, have you done some voltages measured to compare with the topic i link in my previous post :
https://forumtest.whadda.com/t/calibration-failure-edu09/28283/20
Edit 1 : After a more carfull look, it’s look like some resistors confusion … like R8 dont match the documentation ! or im i tired ?
Sorry you have to check all your resistor to find out … if you are color blind your multimeter can help you.
Edit 2 : As R8 is for the LED not a big deal … so maybe just removing and resetting the ICs ?
Tell, if you need more help or if you found the solution.
Have a good day !
I found the solution : resistors confusion (R21 and R23)
Calibration is now OK.
Thanks for your fast answer.
Have a good day .
Jean-Marie
Happy for you !
and glade to have help !
So this topic is solved !
