Headsets, Headphones, Handsfree - pinouts of mobile phones and other equipment  > Blackberry pinouts
original headset marked HDW-12420-001
Pin Pin
Name
Description
1 control +2.4v
2 Audio channel left or right
3 Audio channel left or right
4 Ground Ground

Ring 1 has a 1.4K ohm loading to Ground. When talk/play/pause function button is pushed it applies a short across ring 1 and 4. With ring 1 disconnected the Pearl plays via its internal speaker. However with 1 and 4 shorted it continues to play from its internal speaker!
 


 

4 pin 3.5mm (2.5mm) plug connector layout
4 pin 3.5mm (2.5mm) plug connector
at the headset cable
According to 6 reports in our database (5 positive and 0 negative) this pinout should be correct.

Is this pinout
Blackberry 7105t, 7100i, 7100g, 7130g, 7130c, 7130e, 7250, 7290, 7520, Blackberry Pearl 8100, Blackberry 8800, 8820, 8830, 8350i, 8700c, 8700g, 8703e, 8705g audio visual pinout:
Blackberry 7105t, 7100i, 7100g, 7130g, 7130c, 7130e, 7250, 7290, 7520, Blackberry Pearl 8100, Blackberry 8800, 8820, 8830, 8350i, 8700c, 8700g, 8703e, 8705g audio diagram
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