Radio Shack Intercom 43-3105
 

No power on indication when switched on. Power to input transformer, no
power out. Appears input transformer has open input winding. Input leads
are red, output leads are yellow. I have no idea what the output of this
transformer should be. Looking for shcematic, parts list or any other info
that may be helpful. Thanks in advance.

Radio Shack Intercom 43-3105
 

Try this:

http://support.radioshack.com/produc...ercoms&Reuse=N