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Compaq Presario Series Maintenance and Service Guide
United States December 9, 2002
Presario 305 Model
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments
Index
Connector Pin Assignments
This appendix provides connector pin assignment tables for Compaq Presario 305 Model Portable Computers. For more
information on connectors, refer to the section on Rear Connectors.
NOTE: The signals in all tables of this appendix are considered active high unless otherwise indicated by an asterisk (*).
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
Keyboard/Mouse
Connector Pin Signal
1
2
3
4
5
6
Data 1
Clock 2
Ground
+5 V
Clock 1
Data 2
External 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
Not
connected
Ground
Ground
Analog
Ground
Analog
Ground
Analog
Not
connected
Ground
Monitor
Detect
DDC2B
Data
Horizontal
Sync
Vertical
Sync
DDC2B
Clock
Modem
Connector Pin Signal
1
2
3
4
5
6
Unused
Unused
Tip
Ring
Unused
Unused
Universal Serial Bus
Connector Pin Signal
1
2
3
4
+5V
Data -
Data +
Ground
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