Maintenance & Service Guide
Presario 1660 Model
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Connector Pin Assignments
This appendix provides connector pin assignment tables for Compaq Presario 1660 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 | Signal Ground | |
* = Active low |
|
| |
Serial Connector
Connector 
Pin
Signal
1Carrier Detect
2Receive Data
3Transmit Data
4Data Terminal
5Ready
6Signal Ground
7Data Set Ready
8Ready to Send
9Clear to Send Ring Indicator
Keyboard/Mouse
Connector | Pin Signal | |
| 1 | Data 1 |
| 2 | Clock 2 |
| 3 | Ground |
| 4 | +5 V |
| 5 | Clock 1 |
| 6 | Data 2 |
External VGA Monitor
Connector | Pin | Signal |
| 1 | Red Analog |
| 2 | Green Analog |
| 3 | Blue Analog |
| 4 | Not |
| 5 | connected |
| 6 | Ground |
| 7 | Ground |
| 8 | Analog |
| 9 | Ground |
| 10 | Analog |
| 11 | Ground |
| 12 | Analog |
| 13 | Not |
| 14 | connected |
| 15 | Ground |
|
| Monitor |
|
| Detect |
|
| DDC2B Data |
|
| Horizontal |
|
| Sync |
|
| Vertical Sync |
|
| DDC2B Clock |
Universal Serial Bus
Connector
Pin
Signal
1+5V
2Data -
3Data +
4Ground
Modem
Connector | Pin Signal |
1Unused
2Unused
3Tip
4Ring
5Unused
6Unused
Port Replicator
Pin | Signal | Pin | Signal | Pin | Signal | Pin | Signal |
1 | N.C. | 21 | Printer Data 0 | 41 | N.C. | 61 | CTS |
2 | N.C. | 22 | Printer Data 1 | 42 | N.C. | 62 | DCD |
3 | Kb Clk 1 | 23 | Printer Data 2 | 43 | Switch A | 63 | DSR |
4 | Joystick Data A | 24 | Printer Data 3 | 44 | Switch B | 64 | TXD |
5 | Kb Data 1 | 25 | Printer Data 4 | 45 | Switch C | 65 | RTS |
6 | Joystick Data B | 26 | Printer Data 5 | 46 | Switch D | 66 | N.C. |
7 | Kb Clk 2 | 27 | Printer Data 6 | 47 | N.C. | 67 | Detect |
8 | Joystick Data C | 28 | Printer Data 7 | 48 | MIDI In | 68 | N.C. |
9 | Kb Data 2 | 29 | USB 0 - | 49 | MIDI Out | 69 | V. Sync |
10 | Joystick Data D | 30 | USB 0 + | 50 | +5V | 70 | Ground |
11 | Lp Select In | 31 | USB 1 - | 51 | +5V | 71 | H. Sync |
12 | Lp Paper End | 32 | USB 1+ | 52 | N.C. | 72 | Ground |
13 | Lp Initialize | 33 | Adapter In | 53 | N.C. | 73 | Blue |
14 | Lp Busy | 34 | Adapter In | 54 | N.C. | 74 | Ground |
15 | Lp Error | 35 | Adapter In | 55 | N.C. | 75 | Green |
16 | Lp Ack | 36 | Adapter In | 56 | Dock ID - | 76 | Ground |
17 | Lp Auto Feed | 37 | Adapter In | 57 | RXD | 77 | Red |
18 | Lp Strobe | 38 | Adapter In | 58 | Lp Select | 78 | Ground |
19 | DDC2BC | 39 | N.C. | 59 | RI | 79 | N.C. |
20 | DDC2BD | 40 | N.C. | 60 | DTR | 80 | N.C |