Internal microphone troubleshooting
Check for mechanical contamination in the microphone holes, misplaced gaskets, misplaced gauze, liquid
damage.
Perform DigiMic Self Test.
Electrical tests using audio clip record application, measure:
•
1.8V on VDigiMic on C2115
•
DigiMicClk on J2856
(There is no test access to DigimicData)
Figure 15 VDigiMic audioclk
Component check and consider replacement of:
•
C2115 microphone VDigiMic supply decoupling maybe short
•
C2850 microphone clock filter maybe short circuit
•
B2100 main microphone maybe broken (no audio or intermittant audio)
•
B2104 noise cancelling microphone maybe broken (poor audio or strange fault report)
•
N2200 audio asic
•
D2800 main BB asic
Vibra troubleshooting
Check for mechanical jamming by foreign object, sticky vibra shaft or obvious damage.
Electrical tests using normal touchscreen haptics screenpress operation, ensure the option is activated and
measure:
RM-609
BB Troubleshooting and Manual Tuning Guide
Issue 1
COMPANY CONFIDENTIAL
Page 3 – 41
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