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-424; RM-564
BB Troubleshooting and Manual Tuning Guide
Issue 1
COMPANY CONFIDENTIAL
Page 3 –57
Copyright © 2009 Nokia. All rights reserved.
Содержание 6720 classic
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