Peter :Have you had a look in www.beotech.co.uk which is part of this site? All is free there!
Good call, Peter!
The 5173 is the US model (120v) CD4500 -I assume the application is the DIN lead back to the master?
Look here
It appears that w/ a CD that the pins you need to be concerned w/ are: 2-3-5-6-7