[s-cars] PSO

[Aaron]

I spent a few hours diagnosing a failed PSO (power stage output) devive.
This list is superb.  Thanks to archive tips, I saved hrs and the cost
of buying a PSO device by utilizing the extra unused channel.
Many thanks to those who contributed this info to the list!
The one thing I did not discover is what the hell is the purpose of
these POS'S.
Can anybody explain what they do?
Thanks
Aaron - sans Bently in Idaho.