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Maintenance &
Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product
Description | Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications
Pin Assignments | Battery
Pack Operations
This section provides connector pin assignment tables for Compaq Presario 1800 Series Portable Computers. For more information on connectors, refer to the sections on Back Connectors and Port Replicator Connectors.
NOTE: The signals in all tables of this appendix are considered active high unless otherwise indicated by an asterisk (*).
Parallel Connector |
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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 |
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Connector | Pin | Signal |
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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 |
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Connector | Pin | Signal |
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1 2 3 4 5 6 |
Data
1 Data 2 Ground +5 V Clock 1 Clock 2 |
External VGA Monitor |
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Connector | Pin | Signal |
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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 +5V Ground Monitor Detect DDC2B Data Horizontal Sync Vertical Sync DDC2B Clock |
Universal Serial Bus |
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Connector | Pin | Signal |
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1 2 3 4 |
+5V Data - Data + Ground |
Modem |
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Connector | Pin | Signal |
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1 2 3 4 5 6 |
Unused Tip Ring Unused Unused Unused |
TV Out |
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Connector | Pin | Signal |
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1 2 3 |
Ground Composite Ground |
Game Port |
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Connector | Pin | Signal |
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 |
+5V SWA RBTA GND GND RBTB SWB +5V +5V SWC RBTC RMSO RBTD SWD RMSI |
S Video |
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Connector | Pin | Signal |
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1 2 3 4 |
Ground Ground SYR SCG |
Port Replicator Connector | |||||||
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Pin | Signal | Pin | Signal | Pin | Signal | Pin | Signal |
1 | Adapter Power | 21 | Serial Port CTS | 41 | Not Connected | 61 | Switch C |
2 | Adapter Power | 22 | Serial Port DCD | 42 | Power Cycle | 62 | Switch D |
3 | Adapter Power | 23 | Serial Port DSR | 43 | Keyboard Clock | 63 | MIDI Input |
4 | Adapter Power | 24 | Serial Port TXD | 44 | Keyboard Data | 64 | MIDI Output |
5 | Adapter Power | 25 | Serial Port RTS | 45 | Mouse Clock | 65 | Not Connected |
6 | Adapter Power | 26 | Monitor DDC | 46 | Mouse Data | 66 | USB Power |
7 | Not Connected | 27 | Monitor DDC | 47 | Lp Select | 67 | USB Power |
8 | Printer Data 0 | 28 | Monitor Indicator | 48 | Lp Paper End | 68 | USB Power |
9 | Printer Data 1 | 29 | V. SYNC | 49 | Lp Initialize | 69 | USB Power |
10 | Printer Data 2 | 30 | Ground | 50 | Lp Busy | 70 | USB A- |
11 | Printer Data 3 | 31 | H.SYNC | 51 | Lp Error | 71 | USB A+ |
12 | Printer Data 4 | 32 | Ground | 52 | Lp Acknowledge | 72 | USB B- |
13 | Printer Data 5 | 33 | Blue | 53 | Lp AutoFeed | 73 | USB B+ |
14 | Printer Data 6 | 34 | Ground | 54 | Lp Strobe | 74 | 5V |
15 | Printer Data 7 | 35 | Green | 55 | Joystick Data A | 75 | 5V |
16 | Lp Indicator | 36 | Ground | 56 | Joystick Data B | 76 | Not Connected |
17 | Port Replicator Dock Indicator | 37 | Red | 57 | Joystick Data C | 77 | S-Video SYR |
18 | Serial Port RXD | 38 | Ground | 58 | Joystick Data D | 78 | Ground |
19 | Serial Port RI | 39 | Composite TV Out | 59 | Switch A | 79 | S-Video SCG |
20 | Serial Port DTR | 40 | Not Connected | 60 | Switch B | 80 | Ground |