All Speaker Test

The combination tone is used for numerous audio problems, such as the following conditions:
^ Distorted sound from the speakers
^ No sound from the speakers

When using the combination tone, comparative AC voltage measurements can be made on the speaker terminals provided that the following controls are in the detent position:
^ FADE
^ BALANCE

With these voltage measurements, a determination can be made in the diagnosis of the following components:
^ A speaker
^ An amplifier