Blackberry pearl 8100 audio pinout

PDA connectors and cables

4 pin 3.5mm (2.5mm) plug connector layout

4 pin 3.5mm (2.5mm) plug connector
at the headset cable

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!

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