Calibration results:
CH1 offset at 2V/div : 77 FAIL
Rounds : 51
CH1 offset at 1V/div : -46 OK
Rounds : 51
CH1 Y-position low, CH1_DAC1 201 0
Rounds : 33
CH1 Y-position mid, CH1_DAC0 201 77
Rounds : 51
CH1 Y-position high, CH1_DAC2 201 255
Rounds : 32
Getting this calibration result, cant be much wrong as it worked initially but now refuses to calibrate
This result may indicate soldering problem. Please check carefully all solder joints.
Check also the ICs are well inserted to the sockets.
Please see these threads for about similar problems and solutions:
thread 1
thread 2
thread 3
thread 4
Please check the voltage on pin 4 of IC2. Should be about -5.2V.
If not, please see this thread for more info:
Calibration failure EDU09
followed those threads, and suddenly I’m getting the correct voltages. Ran the calibration and it’s worked. This sounds like my soldering. If it won’t calibrate again I’ll get back to you, in the meantime fingers crossed
I’m glad it’s working again.