Maintenance & Service Guide

Presario 1600 Series

Models: 1650 and 1655

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Connector Pin Assignments

This appendix provides connector pin assignment tables for Compaq Presario 1600 Series 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

1Carrier Detect

2Receive Data

3Transmit Data

4Data Terminal Ready

5Signal Ground

6Data Set Ready

7Ready to Send

8Clear to Send

9Ring Indicator

Keyboard/Mouse

Connector

Pin

Signal

1Data

2Not defined

3Ground

4+5 VDC

5Clock

6Not defined

External VGA Monitor

Connector

Pin

Signal

1Red Analog

2Green Analog

3Blue Analog

4Not connected

5Ground

6Ground Analog

7Ground Analog

8Ground Analog

9Not connected

10Ground

11Monitor Detect

12DDC2B Data

13Horizontal Sync

14Vertical Sync

15DDC2B Clock

Universal Serial Bus

Connector

Pin

Signal

1 Ground

2D+

3D-

4Power

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.

Modem

Connector

Pin

Signal

1Unused

2Unused

3Tip

4Ring

5Unused

6Unused

Page 9
Image 9
Compaq Presario 1600 Series, 1650, 1655 manual Connector Pin Assignments

1650, 1655, Presario 1600 Series specifications

The Compaq Presario 1600 Series was a range of laptop computers introduced in the late 1990s, catering to users seeking performance and portability at an affordable price. Among the most notable models in this series were the Compaq Presario 1650 and 1655, which offered a combination of usability and innovative features that appealed to both casual users and professionals.

These laptops were characterized by their sleek design and relatively lightweight build, making them practical for users on the go. Weighing approximately 6.5 to 7 pounds, they were still manageable for regular travel. The displays featured a 15-inch diagonal screen with a resolution of 800x600 pixels, a respectable offering for that era, providing clear visuals for productivity tasks and multimedia consumption.

Powering these laptops, users found a choice between Intel Pentium II and III processors, allowing for enhanced performance. With speeds ranging from 300 MHz to 450 MHz, these processors ensured that users could run various applications efficiently, whether for business or entertainment. The Presario 1655 provided options for more advanced graphics with an integrated S3 Savage graphics card, enhancing its capability for 3D applications and casual gaming.

In terms of memory, the 1600 series laptops typically came equipped with 32 MB of RAM, which could be upgraded to accommodate the increasing demands of software and multitasking. Additionally, the units included a hard drive capacity ranging from 4 GB to 12 GB, providing ample storage space for documents, multimedia files, and applications.

Connectivity options were also a significant focus for the Presario 1600 Series. Featuring both Ethernet and modem ports, users could easily connect to networks and the internet. The laptops included USB and parallel ports, catering to a variety of peripheral devices, including printers and external storage solutions.

Another notable aspect of the Compaq Presario 1600 series was its emphasis on multimedia features. The presence of a built-in CD-ROM drive allowed users to access software and media easily, while integrated speakers offered decent audio output for video playback. Some models even came equipped with a 56k modem for dial-up internet access, keeping users connected during an era when internet use was expanding rapidly.

Overall, the Compaq Presario 1600 Series, including the 1650 and 1655 models, represented a significant step in portable computing during the late 1990s. With their combination of performance, portability, and multimedia capabilities, these laptops were well-received and laid the groundwork for future advancements in the laptop industry.