Because this unit is over 30 years old, capacitors dry out, solder joints crack, and relays stick. This is where the becomes your best friend.

Owning one today is a testament to the "they don't make them like they used to" philosophy. The capacitors are substantial, the heat sinks are real, and the volume knobs offer a satisfying resistance that plastic modern counterparts lack.

Assuming you locate a PDF copy of the original Teac documentation, here is how to use it to restore your receiver.