Hello, I have a system (approx. early 80's)which the chime quit working. The insruction sheet that I found says it is a: NUTONE 3-Station Door - Answering Intercom Model : IK-25 What is confusing is, when I pulled the outside housing, it says Nutone Scovill (it is brown with Goldtone area where lighted door bell pushbutton is and on the inside close to the bell button it has a raised "Model" IS 67 showing. I need the replacement speaker and possibly the 2 blue capacitors that appear to be tied in series. I pulled the button for chime & the bulb and when I jump the two wires, I still get nothing as far as the chime working. Any ideas? The speaker for outside says B-36076 and 16 ohm 1 W Korea. This is on the speaker magnet. Guess the first question would be.. the burnt out or lack of bulb should not affect the chime? I have power at the transformer, but none at the 2 wires connecting to the bell push button.Any input would be appreciated before I change out the existing system. Thank you.. Dennis

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