Ticket #2335 (new defect)

Opened 8 years ago

GSM buzz on FreeRunner A7 (seven)

Reported by: blindcoder Owned by: hardware
Priority: normal Milestone:
Component: hardware Version:
Severity: major Keywords: A7 gsm buzz capacitor
Cc: Blocked By:
Blocking: Estimated Completion (week):
HasPatchForReview: no PatchReviewResult:
Reproducible:

Description

There is a lot of GSM buzz on the FR A7 (recording attached).
I was trying the capacitor next to the microphone with a multimeter:
black cable to ground, red cable to right (close-to-mic) side with audible resistance checker gives signal (short circuit), but when applying a bit of force on red cable (connected to capacitor), audio signal stops, indicating loss of connection on the capacitor.

Resoldering the capacitor gives way better audio quality on remote side (person I'm calling).

Attachments

gsmbuzz.wav.aa (2.0 MB) - added by blindcoder 8 years ago.
recording of gsm buzz, part 1
gsmbuzz.wav.ab (2.0 MB) - added by blindcoder 8 years ago.
recording of gsm buzz, part 2
gsmbuzz.wav.ac (254.8 KB) - added by blindcoder 8 years ago.
recording of gsm buzz, part 3

Change History

Changed 8 years ago by blindcoder

recording of gsm buzz, part 1

Changed 8 years ago by blindcoder

recording of gsm buzz, part 2

Changed 8 years ago by blindcoder

recording of gsm buzz, part 3

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