[TA-A] RCA F35750ST (CTC169BG5) SHUT DOWN WHEN P1905 CONNECTED to AUDIO PCB

 Dear Forum members:
Shut down when connector P1905 connected to upright Audio PCB.
4 pin plug, B+ and B- OK, no drop in voltage when connected.  
Audio outputs replaced (TDA's). what are the signals, or voltages
associated with P1905, in order to troubleshoot or any other helpful
hints?

Thanks,
Jack

 

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