Maintenance & Service Guide
Presario 3500 Series Personal Computers

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Universal Serial Bus (USB)

Speaker/Headphone Out

Phone Line to Wall

Phone Line to Phone

Connector Pin Assignments

This section contains the connector pin assignments for the Presario 3500 series of personal computers.

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Parallel Connector

Pin	Signal	Pin	Signal
1	Strobe*	10	Acknowledge*
2	Data Bit 0	11	Busy
3	Data Bit 1	12	Paper Out
4	Data Bit 2	13	Select
5	Data Bit 3	14	Auto Linefeed*
6	Data Bit 4	15	Error*
7	Data Bit 5	16	Initialize Printer*
8	Data Bit 6	17	Select In*
9	Data Bit 7	18-25	Signal Ground
* = Active low

Serial Connector
Connector	Pin	Signal
	1 2 3 4 5 6 7 8 9	Carrier Detect Receive Data Transmit Data Data Terminal Ready Signal Ground Data Set Ready Ready to Send Clear to Send Ring Indicator
Universal Serial Bus
Connector	Pin	Signal
	1 2 3 4	- Data +Data Ground +5 VDC
Keyboard
Connector	Pin	Signal
	1 2 3 4 5 6	Data Unused Ground +5 VDC Clock Unused
Mouse
Connector	Pin	Signal
	1 2 3 4 5 6	Data Unused Ground +5 VDC Clock Unused

VGA Monitor
Connector	Pin	Signal
	1 2 3 4 5 6 7 8 9 10 11 12 13 14 15	Red Analog Green Analog Blue Analog Volume Up Ground Ground Analog Ground Analog Ground Analog +5 VDC Ground Volume Down DDC Data Horizontal Sync Vertical Sync DDC Clock

Line In
Connector		Connector
		Stereo 1/8" Miniphone
Speaker/Headphone Out
Connector		Connector
		Stereo 1/8" Miniphone
Microphone
Connector		Connector
		Stereo 1/8" Miniphone
Phone Line to Wall Jack
Connector	Pin		Signal
	1 2 3 4		Unused Tip Ring Unused
Phone Line to Phone
Connector	Pin		Signal
	1 2 3 4		Unused Tip Ring Unused


Revised: 19 Nov. 1999