GTA04b7/Neo900

Issue 508: Pin assignment of headset connector

Reported by Nikolaus Schaller, Nov 12, 2013

it has 6 pins and apparently a n insertion switch but it is not 
clear how the pins are connected/numbered.

Comment 1 by Nikolaus Schaller, Nov 12, 2013

Labels: Affects:Modem board

Comment 2 by Joerg Reisenweber, Nov 21, 2013

_plug_ specification according to 
http://www.gsma.com/newsroom/omtp-documents-1-0-omtp-local-connectivi
ty-wired-analogue-audio-v1-0
Tip: left-out
2: right-out
3: mic-in/video-out
4|sleeve: GND

socket as used in N900 yet to get checked for pin assignment to 
above plug-pins

Comment 3 by Nikolaus Schaller, Nov 26, 2013

Results from measuring between an open 4-wire 3.5mm plug and the 
test points

* pin order on test points (pcb inner to PCB edge): 2 (right) - 4 
(gnd1) - 1 (tip = left) - 4 (gnd2) - 3 (mic) - 4 (gnd3)
* two of the three "GND" are not really grounded but 
activated by the insertion switch
* if one looks into the hole we can see a bigger and a smaller 
contact right at the beginning of the hole. The smaller one is 
connected to the last (gnd3) and the bigger one to the first (gnd1)

Comment 4 by Nikolaus Schaller, Dec 14, 2020

Status: WontFix

Created: 10 years 11 months ago by Nikolaus Schaller

Updated: 3 years 10 months ago

Status: WontFix

Followed by: 1 person

Labels:
Affects:Modem board
Type:Defect
Priority:Critical