[home intercom schematic needed]

It wont communicate with the stations, the radio is very weak and a wire came off the board when i looked at it.
do you know where i can find a service manual or a schematic. i can take pictures of the unit if needed

[home intercom schematic needed]

My old Miami Carey master intercom unit has gone on the fritz. Does anyone know wher i can find the schematics for this. It is an early model and i am sure the fix is easy if i had a roadmap. Thanks in advance.