Bose Companion 3 Service Manual page 24

3. Bass Module Tone Control Test
3.1 Apply a 90 mVrms, 100 Hz signal to the input of the bass module.
3.2 Set the volume knob on the control pod to maximum (fully clockwise), and set the bass control to
it's center detent (flat) position.
3.3 Rotate the tone control fully clockwise and counter clockwise.
3.4 Verify that the bass level cleanly increases and decreases in level (without any scratchy noise).
4. Satellite Sweep Test
4.1 Apply a 2 Vrms, 100 Hz signal to the input of the bass module.
4.2 Set the volume knob on the control pod to maximum (fully clockwise), and set the bass control to
it's center detent (flat) position.
4.3 Sweep the satellite speakers from 100 Hz to 3 kHz then from 3 kHz to 100 Hz.
4.4 Listen carefully for buzzes, rattles, or other extraneous noises from the Twiddler™ speakers,
plastic satellite enclosure, grille, or internal wires.
4.5 Replace any satellite that is found to be defective.
5. Satellite Air Leak Test
5.1 Apply a 2 Vrms, 200 Hz signal to the input of the bass module.
5.2 Set the volume knob on the control pod to maximum (fully clockwise), and set the bass control to
it's center detent (flat) position.
5.3 Listen carefully for air leaks along edges of the satellite and near the grille where the Twiddler
speaker is installed.
5.4 Replace any satellite that is defective.
Test Procedures
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