Some Blackberry Models Pin Out Collection
4 pin 3.5mm (2.5mm) plug connector
at the headset cable
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!
Pinout compatibility:
- Blackberry 5810
- Blackberry 5820
- Blackberry 6230
- Blackberry 6280
- Blackberry 6510
- Blackberry 6710
- Blackberry 6750
- Blackberry 7100
- Blackberry 7105
- Blackberry 7130c
- Blackberry 7130e
- Blackberry 7130g
- Blackberry 7210
- Blackberry 7230
- Blackberry 7250
- Blackberry 7270
- Blackberry 7280
- Blackberry 7290
- Blackberry 7520
- Blackberry 7730
- Blackberry 7750
- Blackberry 7780
- BlackBerry 8100 Pearl
- Blackberry 8700c
- Blackberry 8700f
- Blackberry 8700g
- Blackberry 8700r
- Blackberry 8700v
- Blackberry 8703e
- Blackberry 8705g
- Blackberry 8800
- BlackBerry 8820
- Blackberry 8830
- Blackberry Blackberry 6210
- Blackberry Pearl
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