Possible Causes
| Possible Causes |
|---|
| ANC MICROPHONE 4 |
| ANC MICROPHONE 4 (+) CIRCUIT SHORTED TO THE ANC MICROPHONE 4 (-) CIRCUIT |
| AMPLIFIER |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .