Hey...
Ya, R26.. except they were 10 ohms... (SMD resistor says 100, is 10 ohms)...
There was also another on a small PCB with the 4093 (not on schematic)...
With both of the resistors in series (20ohms total), the servo with a Renco encoder that had an LM339 already wouldn't work...
Once I removed the 20 ohms, it was ok...
I will post some info about the control board a bit later, I'm currently working on it...
Michael