6Thermal Cutoff Procedure

Bose 1800 Power Amplifier

6.1 Apply a signal to the unit with the outputs loaded 8 or 4 ohms . Short one channel at a time until the unit goes into thermal cutoff. The thermal indicator should turn on and the output of the unit should be off. 6.2 Disconnect the short from the output. Wait until the unit comes out of thermal cutoff. You can speed this process by cooling the PCB with a fan. 6.3 Once the unit is cooled apply a signal to the channel you had shorted to check to see if its operational. 6.4 Apply a signal to...