Looking for Auditronics 501 Talkback module schematics

[John Noll]

I'm trying to get an Auditronics 501 console up and running. I am looking for the schematics for the 501-TB (talkback) and 501-TBM (talkback/mute) modules.  This console is an early model - serial #35.  I have these schematics for the later model consoles (serial number 108 and later) but need the earlier version docs.  There are some differences because the later models had a different mute scheme.  Something is wrong in my wiring because when I activate the talkback button, all the meters pin and several relays trip.  Then nothing.  No talkback or meter movement after that.  The mute LED on the meter bridge is always on but the mute button does nothing.  Thanks.

jn145_AT_verizon_DOT_net

 

[QUEEF BAG]

sorry about the slow action


oops these are probably the newer ones

 

[QUEEF BAG]

and the low rez

 

[John Noll]

Thank you QB.  I have both of those docs already.

The one that would really help me out is the early serial number 501-TBM (Talkback Mute Module).  I have this schematic for the later consoles (Serial number 108 and later).  Mine is #35 and the mute scheme is different.