Wayne, I made the measurements of U3. Here's what I got.. Pin 1 4.93 volts Pin 2 0.00 volts Pin 3 5.55 volts Pin 4 5.55 volts Pin 5 0.00 volts Pin 6 0.00 volts Pin 7 0.30 volts Pin 8 2.60 volts C9 is a "102" .001 R6 is a 220 ohm (red red brown) All leads were trimmed flush of all components.. 73, James