HP-29C ACT compatibility

[biogon]

Very interesting information about the compatibility of the ACT chip.
I have already repaired several HP calculators like; 10,21,22,25,37,55,65,67,97 and 41, and I have the tools and knowledge to do it.
But, my last purchase a HP 29c does not want to work. After cleaning the electrolyte leaks from the batteries and checking capacitors and voltages of the PS, I have concluded that the ACT, at least, is defective.
I refuse, for now, to look for a 21 or 22 to donate the ACT, and I have been looking the waves in the ACT pins. I notice that the initial RST does fine, but the output / O1 on pin 17 has only 1V amplitude, while the / O2 on pin 16 is ok with 18V.
The high threshold on both is the Vss + 6V, but in phase!
I am considering adding a small circuit with transistors to generate / O1 from / O2 and insert it into pin 17 line of the ACT.
If someone has already tried this solution, I would appreciate if can tell me if it could work, or go directly to replace the ACT.
Thanks in advance.