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T28P Handset Noise Problems
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belcom Offline
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Posts: 2
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Post: #16
RE: T28P Handset Noise Problems
My analysis has been similar. It seems the silicon dab covering the electret microphone somehow breaks down, and takes on some capacitance. When you remove the silicon, it instantly resolves the buzzing sound completely. This could be why the buzzing sound disappears after the handset has been removed from the curl cord and left to sit for a few days. However, this does not always resolve the issue. The definitive method seems to be to remove the silicon entirely. The microphone seems to hold well in the casing even if the silicon is removed.
(This post was last modified: 01-03-2016 10:16 AM by belcom.)
01-03-2016 10:11 AM
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Messages In This Thread
T28P Handset Noise Problems - fdtcloud - 02-20-2014, 07:18 AM
RE: T28P Handset Noise Problems - fdtcloud - 02-21-2014, 12:08 AM
RE: T28P Handset Noise Problems - braymond - 02-27-2014, 10:58 AM
RE: T28P Handset Noise Problems - braymond - 03-04-2014, 09:49 PM
RE: T28P Handset Noise Problems - fdtcloud - 03-07-2014, 06:16 AM
RE: T28P Handset Noise Problems - temp0001 - 03-09-2014, 12:01 PM
RE: T28P Handset Noise Problems - Walter - 06-18-2014, 09:18 PM
RE: T28P Handset Noise Problems - braymond - 06-19-2014, 07:50 AM
RE: T28P Handset Noise Problems - Walter - 06-20-2014, 06:43 PM
RE: T28P Handset Noise Problems - belcom - 01-03-2016 10:11 AM
RE: T28P Handset Noise Problems - mbello - 08-23-2016, 10:59 PM
RE: T28P Handset Noise Problems - belcom - 08-24-2016, 06:30 AM

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