NO.7 POOR SOUND QUALITY (POOR TREBLE SOUND)

id0903a1825400

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 the 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

• The tape used for a long time may have a poor sound quality.

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.