Mazda CX-7 2007 Workshop Manual page 1463

SYMPTOM TROUBLESHOOTING [CASSETTE TAPE PLAYER]
NO.6 THERE IS A NOISE WHEN PLAYING THE CASSETTE TAPE PLAYER[CASSETTE TAPE PLAYER]
6 There is a noise when playing the cassette tape player/Possible DTC: —
Troubleshooting hints
• Cassette tape is malfunctioning
• Cassette tape player is malfunctioning
• Poor connection of cassette tape player connector
• Dolby noise reduction is used improperly
• The after-market electrical parts interfere with the audio system
Diagnostic procedure
STEP
• Set the Dolby noise reduction properly.
1
• Is there any noise?
• Replace with a cassette tape known to be
2
good.
• Is there any noise?
• Inspect and re-connect the cassette tape
3
player connector.
• Is there any noise?
• Are any of the following after-market
4
electrical parts on the vehicle?
— Cellular phone
— Radio-wave equipment
— Remote engine starter
— TV
• Remove the after-market electrical parts.
5
• Is there any noise?
End Of Sie
NO.7 POOR SOUND QUALITY (POOR TREBLE SOUND)[CASSETTE TAPE PLAYER]
7 Poor sound quality (Poor treble sound)/Possible DTC: —
Troubleshooting hints
• Tape head gathers oxide residue from cassette tape
• Cassette tape is malfunctioning
• Cassette tape player is malfunctioning
• Dolby noise reduction is used improperly
Diagnostic procedure
STEP
• Inspect the Dolby noise reduction mode.
1
• Is the Dolby noise reduction mode set
correctly?
• Set the Dolby reduction mode correctly.
2
• Is the sound improved?
• Replace with a cassette tape known to be
3
good.
• Is the sound improved?
• Clean the tape head using the good quality
4
head-cleaning tape.
• Is the sound improved?
End Of Sie
INSPECTION
INSPECTION
Yes Go to the next step.
No Set the Dolby noise reduction correctly.
Yes Go to the next step.
No The cassette tape player is normal. Explain to the customer
that the cassette tape is malfunctioning.
Yes Go to the next step.
No The cassette tape player is normal. Explain the repairs to
the customer.
Yes Go to the next step.
No Replace the cassette tape player.
Yes Replace the cassette tape player.
No The cassette tape player is normal. Explain to the customer
that the after-market electrical parts interfere with the audio
system.
Yes Go to the Step 3.
No Go to the next step.
Yes Set the Dolby noise reduction correctly.
No Go to the next step.
Yes The cassette tape player is normal. Explain to the customer
that the cassette tape is malfunctioning.
Note
• Sound quality deteriorates on cassettes that have
been played over a long period of time.
No Go to the next step.
Yes Explain the repairs (head cleaning) to the customer.
No Replace the cassette tape player.
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