Dell Dimension 2350, 2400 internal USB & Speaker распиновка и описание @ pinouts.ru

20 Pin Front panel USB, Speaker (Optional MIC) Proprietary

2..................20
1..................19
Viewed from the top (connector) side of the motherboard.

Motherboard Pin Name	Motherboard Pin Number	Direction	Pin Number	Pin Name	Description
Data0-	1	-?-			Data - for USB port 0 (Bottom)
Data0+	3	-?-			Data + for USB port 0 (Bottom)
Data1-	5	-?-			Data - for USB port 1 (top)
Data1+	7	-?-			Data + for USB port 1 (top)
GND	9	-?-			Ground
GND	11	-?-			Ground
Left Audio In *	13	-?-			Input for rear Audio (L) *
Right Audio In *	15	-?-			Input for rear Audio (R) *
GND	17	-?-			Ground
MIC IN	19	-?-			Microphone Input (+)
Detect **	2	-?-			See below **
Vcc	4	-?-			+5V for USB ~Both~
?	6	-?-			Unknown
Vcc	8	-?-			+5V for USB ~Both~
Ring *	10	-?-			Speaker Ring & RS Terminal *
Tip *	12	-?-			Speaker Tip & TS Terminal *
Detect **	14	-?-			See below **
Keyed	16	-?-			No pin
GND	18	-?-			Ground
?	20	-?-			Unknown

To use this board in a non-dell case w/o front USB & sound:

* Jump (connect) pins 10-13 (L) and 12-15 (R) for rear sound.

** Jump (connect) pins 2-14 to avoid "Front panel USB cable not detected" error.

The Dell Dimension 2400 uses the "standard" 9 pin USB header for the front ports and use a separate connector for the front headphone jack (the same connector used on many dells of that era).

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Dell Dimension 2350, 2400 internal USB & Speaker - распиновка