8. Close the error pop-up window, if it appears.
9. The test returns dB values for reference mic (the backside mic) and the error mic (the earpice mic).
Acceptable dB values are:
•
Reference mic: -21 dB … -41 dB
•
Error mic: -28 dB … -48 dB
A much lower value may indicate a fault in the microphone or a block in the sound inlet.
It is recommended to run this test more than once and observe the results. There may be an electrical
fault if a microphone gives exactly the same result each time.
The test returns also PASS/FAIL information for both microphones.
RM-529; RM-530; RM-584
BB Troubleshooting and Manual Tuning Guide
Page 3 –40
COMPANY CONFIDENTIAL
Issue 1
Copyright © 2009 Nokia. All rights reserved.