Honda Accord 2008 Manual page 2548

07/11/02 09:51:50 61TA0000_230_0104
Sound Quality Diagnosis
Special tools required
Diagnostics CD 07AAZ-SDBA100
Use the following tests to check sound quality.
NOTE: Before beginning the following tests, write down
the customer's bass, treble, fader and balance settings,
then set them to their center positions for the testing.
Left/Right Channel ID
Do this test to confirm proper channel routing.
1. Insert the audio diagnostic CD (T/N 07AAZ-
SDBA100) into the audio unit.
2. Play track No. 1 (left, both, right channel ID) at a
normal, or slightly higher than normal, volume
level.
3. The voice should be audible only from the channel
or channels when indicated.
• If the channel ID is correct for each side, go to
phase test.
• If the channel ID is not correct, check for
– Shorted speaker wire
– Faulty amplifier
– Faulty audio unit
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Special tools required
Diagnostics CD 07AAZ-SDBA100
Use the following tests to check sound quality.
NOTE: Before beginning the following tests, write down
the customer's bass, treble, fader and balance settings,
then set them to their center positions for the testing.
Phase Test
Do this test to confirm proper speaker phasing.
1. Insert the audio diagnostic CD (T/N 07AAZ-
SDBA100) into the audio unit.
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 (see page
23-104).
• If the voice always sounds out of phase, phasing
is not correct. Check for:
– Crossed speaker wire
– Faulty amplifier
– Faulty audio unit
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23-103 23-103