0. Changed resistor configuration to set to DSOX1202G model
1. Added the missing components on the digital input (external trigger) section as required by DSOX models vs EDUX.
2. Added the missing components on the waveform generator section. Used the existing solder on the empty pads, added no-clean flux, added the components and soldered with hot air soldering iron. It was not working well, so added more flux, resoldered, checked with magnifier, swapped components... in the process of debugging the waveform generator, ended adding to much flux, and other parts of the board started to get compromised... traces not being at Ground level, CH2 showing the same signal as CH1 (even when the front-end sections were not touched at all).
3. Cleaned with alcohol, waveform section worked better, but not 100% perfect.
4. CH1 and CH2 traces were off, sometimes when started, they were out of bounds, one on the positive side, the other on the negative side.
5. Decided to run self-calibration... failed and not able to return to previous calibration state. Changed back to EDUX1052A but calibration failed.
6. Replaced ICs in the self-calibration section. This section also generates son ADJ signals for the front end opamps. Removed the ICs and turned on the scope, to see what type of error I was getting if this section was faulty... got the P-Clock and I-Clock failure message for the first time. Added the components (OPAMPs and HCT04 inverters), continues to get P-Clock and I-Clock failure messages all the time. The inverters receive several PWM/clock signals generated by the ASIC and converts them to analog levels. It is a combination of inverter + TLC274 opamp.
There is a trigger section that receives some of the signals conditioned by the inverter+TLC274 combo and it can be the origin of the TrigComp & Mux error.
Next suspect: passive components on the OPAMP/HCT04 section damaged by overheating with hot air.
Next step: get a serial output log of the full boot process and see if can find any clue