Rittenhouse Emerson 631 and 632 Doorbell Chime

Rittenhouse Emerson Master Model 631/632 is a vintage door‑chime and clock sequencer that integrates the bell solenoids with an internal timing circuit. Common failures include loss of 12 VDC input (often due to corroded power leads or blown fuses), failure of the Atmel ATtiny13A microcontroller in modernized replacement units, and worn solenoid contacts or broken linkages that prevent sound output. First‑check steps: verify a stable 12 VDC supply at the unit’s terminals; inspect all wiring for corrosion or disconnection, especially the solenoid leads; and test the sequencer with a known good power source to confirm microcontroller operation (or replace the ATtiny13A if using a modernized board).[oss-gpt-20b]

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