I need the schematic for a Nutone 'Scovill' IMA-203. We had some lightning nearby, and our intercom had some damage. I am only getting a modest hum at max volume. Thanks for your help, --grouts@earthlink.net

I am looking for operating instructions along with a schematic for the IMA-203 central intercom system. Are either available? Advanced thanks, Peter

I also need a schmatic for a nutone IMA-203, Thanks Marc