The bell won't ring! Repairing a faulty door phone (intercom) by replacing the capacitor. The doo...
I repaired my Aiphone door phone, which only malfunctioned in the mornings during the winter, for 300 yen. While breakdowns due to the deterioration of electrolytic capacitors are common, I realized that there are also breakdowns due to the deterioration of capacitors that are not cheap. I think that shows how harsh the environment in which door phone handsets are placed.