Compaq 1245 specifications Connector Pin Assignments

Page 84

Maintenance & Service Guide

Presario 1200 Series

Model: 1245

Home Page Notice Preface Product Description Troubleshooting Illustrated Parts Catalog Removal & Replacement Procedures Specifications Pin Assignments Battery Pack Operations

Connector Pin Assignments

This appendix provides connector pin assignment tables for Compaq Presario 1200 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 (*).

Click on a link:

●Parallel Connector

●Serial Connector

●Keyboard/Mouse

●External VGA Monitor

●Universal Serial Bus

●Modem

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

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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

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Keyboard/Mouse

Connector

Pin

Signal

1Data 1

2Data 2

3Ground

4+5 V

5Clock 1

6Clock 2

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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

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Universal Serial Bus

Connector	Pin	Signal
	1	+5V
	2	Data -
	3	Data +
	3

4

Ground

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Modem

Connector

Pin

Signal

1Unused

2Unused

3Tip

4Ring

5Unused

6Unused

Image 84

Contents Maintenance & Service Guide Maintenance & Service Guide Symbols PrefaceCompaq Product DescriptionModels & Features Battery ES NiMH System Memory 32 MBDisplay 12 HPA Processor Hard Drive CD Drive 24× MAX ModemFront Panel Components Controls and LightsLeft Side Components Right Side Components Bottom of Unit Rear Connectors Power Management for Windows Power Management Settings Power Management PropertiesDisplay Properties Sleep Hibernation Mode Mode To Initiate To End IndicatorsRebooting After a Lockup Servicing Your Computer Full Off Mode Illustrated Parts Catalog Place cursor over each device to obtain its part number System UnitBoards Place cursor over each device to obtain its part numberDisplay Assembly Mass Storage Devices Place cursor over each device to obtain its part numberMiscellaneous Cables Kit Power Cord CablesMiscellaneous Hardware and Plastics Kit Miscellaneous Hardware and Plastics KitMiscellaneous Parts Documentation and Software DescriptionSpare Part Number Removal and Replacement Procedures Serial Number LocationElectrostatic Discharge Generating StaticService Considerations Cables and Connectors Select the desired illustrationPlastic Parts ZIF Connectors Ribbon cable position for the 3.2-GB hard drive Ribbon cable position for the CD drive Ribbon cable position for the diskette drive Back to Cables and Connectors Preparing the Computer for Disassembly Removing the Battery Pack To remove the battery pack, complete the following stepsReplacement Procedures Prepare the computer for disassembly Removing the Palmrest Cover with Touch PadWhen replacing the palmrest cover, ensure Return to Removal Removing the Heatspreader Removing the Keyboard Removing the Processor To replace the processor complete the following steps Maintenance & Service Guide Removing the Hard Drive Presario 1200 Series Models Replacement Procedures Removing the CD Drive Maintenance & Service Guide To replace the CD drive, reverse the previous procedures Removing the Battery Charger Board Removing the Modem To replace the modem, reverse the previous procedures Removing the Display Panel Assembly Maintenance & Service Guide Maintenance & Service Guide Maintenance & Service Guide When removing the display panel assembly Return to Removal Removing the Upper CPU Cover Removing the Speaker Assembly Fan Assembly System Board Dip Switch Settings Memory Module Removing the Diskette DriveReplacement Procedures Removing the Fan Assembly System Board Dip Switch Settings Memory ModuleTo replace the fan assembly, reverse the previous procedure Removing the System Board Remove three standoffs from the system board Maintenance & Service Guide Remove three screws from the system board To replace the system board, reverse the previous procedures Removing the Memory Module Memory ModuleReplacement Procedures Specifications Physical and EnvironmentalSystem Interrupts System InterruptsHardware System Function System DMA System DMAHardware DMA System Function Address Hex System Function Shipping Configuration System I/O AddressSystem I/O Address System Memory Catalog System Memory CatalogDisplay Memory Expansion Battery Pack EnergyEnvironmental Requirements Diskette Drive Logical Configuration Hard DrivesHard Drives Capacity Per Drive Formatted Seek Times24× CD Drive Dimensions CD DriveRotational Speed Typical Transfer RateConnector Pin Assignments Battery Pack Operating Time Increasing Battery Pack Operating TimeConditioning a Battery Pack Disposing of a Used Battery PackTroubleshooting Follow the Preliminary StepsPreliminary Steps Run Computer CheckupPower-On Self Test Post Running PostProbable Cause Recommended ActionCompaq Diagnostics Perform Computer Checkup TestView System Information Inspect Contacting Compaq Support Shipping PreparationClearing the Power-on Password Remove the Palmrest Cover with Touch PadDiagnostic Error Codes Select error codes by number or typeTroubleshooting Without Diagnostics Before Replacing PartsSolving Minor Problems Solving PC Card Problems Solving Power Problems