|
Bob, here are some additional questions (sorry and hope I'm not being a PITA):
1 - If the clutch were bad, how would it make a turn either way? I probably don't understand the function of the clutch.
2 - If there are CW and CCW voltage leads, who two 24V leads?
3 - What do the "Effort" leads do? What should they read?
4 - Does the description of the leads mean there are two totally separate circuits in play for each direction (left and right) and that when measured, the appropriate leads should show voltages and the opposite ones won't?
5 - Assuming the -10V reference is there properly, then if I fire up on the ground, pull the center knob and turn to the left, will the CCW and matching 24V and "Effort" leads all read and the others not? And if I then turn to the right, will things be reversed?
6 - When measuring the voltages, will they always be referenced to A/C ground, or to their own side of the circuit?
I'm wondering once I've got the thing out why not just replace all the transistors? They seem cheap and why mess with them? If the control head is sending the correct signals and the potentiometer is good, seems I should just replace all the transistors, or at least the seven 2n1546 versions as you mentioned.
(I think I understand your point about the center knob and the turn coordinator: if it overrides that then and there is still the malfunction, then a potential loss of turn coordinator signal isn't the problem anyway.)
|