NO.7 POOR SOUND QUALITY (POOR TREBLE SOUND)
id0903e1825400
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
INSPECTION
ACTION
1
• Inspect the Dolby noise reduction mode.
• Is the Dolby noise reduction mode set correctly?
Yes
Go to the Step 3.
No
Go to the next step.
2
• Set the Dolby reduction mode correctly.
• Is the sound improved?
Yes
Set the Dolby noise reduction correctly.
No
Go to the next step.
3
• Replace with a cassette tape known to be good.
• Is the sound improved?
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.
4
• Clean the tape head using the good quality head-cleaning tape.
• Is the sound improved?
Yes
Explain the repairs (head cleaning) to the customer.
No
Replace the cassette tape player.