Sound Quality Diagnosis - Phase Test

Sound Quality Diagnosis - Phase Test

Special Tools Required

- Diagnostics CD 07AAZ-SDBA100

Phase Test

Do this test to confirm proper speaker phasing.

1. Insert audio diagnostic CD (T/N 07AAZ-SDBA100) into the CD player.

2. Play track No. 2 (phase) at a normal, or slightly higher than normal, volume level.

3. The voice should sound centered, and focused when it is in-phase.

4. The voice should sound diffused, and have less bass when it is out of phase.
- If the voice changes from in-phase to out of phase as indicated by the prompt, the phasing is correct. Go to electrical noise test. Sound Quality Diagnosis - Electrical Noise Test

- If the voice always sounds out of phase, phasing is not correct. Check for:
- Crossed speaker wires

- Faulty audio unit