for andyfierman
first of all
thanks for your great availability and for the time that you gave me.
I tried the gate nor but this still does not work.
I followed your instructions for the replacement of components, but I'm lost. help me, let's take a practical example.
I would replace the 74hc73 with cd4027.
but the ones I found did not turn the simulation.
where did I go wrong?
I made a subsection with your OR2EE followed by an INVEE gate and another where I replaced the OR2EE + INVEE series connected gates with a NOR2EE and that section of your circuit seems to work fine:
https://easyeda.com/andyfierman/filmax-1741aa4bd65146ceb103ad89aae11a98
Both work fine.
One thing I did notice is that you have used a 5 mil grid.
All EasyEDA components have pins on a 10 mil grid so your schematic should still connect up OK with a 5 mil grid but please check to make sure that your components and probes are all connected up properly.
@andyfierman
I went to see the scheme where you have replaced the OR gates and inverter with a NOR gate but I see that the symbol is to the OR gate, I do not understand.
I checked the connections and probes, all seems ok from now on, however, I will work with the grid to 10 mils.
for now I have to stop because I exceeded the number of daily simulations
See you tomorrow
Sorry!
My bad.
I have replaced the OR2EE with the (correct) NOR2EE gate.
It all still works.
:)
Brand new interactions and interfaces. 
Easy to use and quick to get started. 
The only logic parts that run in simulation are the ones available in the EasyEDA Libs plus any that appear in the:
https://easyeda.com/component/user/subckt/1
https://easyeda.com/component/user/subckt/2
https://easyeda.com/component/user/subckt/3
https://easyeda.com/component/user/subckt/4
lists.
They are all specialised models built or adapted for EasyEDA.
No other logic models that you may find on the web will simulate in EasyEDA without a lot of adaptation.
No other logic parts from the EasyEDA library will simulate because they do not have EasyEDA models associated with them.
I will look at your project and try to see what you need to do to get it working.
First thing to do is to break it into subsections and get each one working on it's own then put the subsections together a stage at a time.
See:
https://easyeda.com/example/Tesseract_Guitar_Practice_Amp_simulation_files-H0ca8IFDB
as an example of breaking sims up into sections.
By all means include some overlap between sections so that the i/o parts are modelled in each sim.