HP 305 Service Manual
Presario 305 Model
Before You Begin |
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Specifications |
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Parts Catalog |
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Removal Sequence |
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Troubleshooting |
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Battery Operations |
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Index |
Product Description |
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Pin Assignments |
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Before You Begin
Product
Description
Troubleshooting
Illustrated
Parts Catalog
Removal &
Replacement
Procedures
Specifications 
Connector
Pin
Assignments
Battery Pack
Operations
See
Notice for
copyright and trademark information, and see Preface for
symbol conventions, Technician Notes and Serial Number locations on the unit.
This MSG will be periodically maintained and updated as needed. To report a technical problem, contact your Regional Support Center or IM Help Center. For content comments or questions, contact Compaq.
Presario 305 Model
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Specifications |
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Parts Catalog |
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Removal Sequence |
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Troubleshooting |
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Battery Operations |
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Index |
Product Description |
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Pin Assignments |
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Notice
The information in this guide is subject to change without notice.
COMPAQ COMPUTER CORPORATION SHALL NOT BE LIABLE FOR TECHNICAL OR EDITORIAL ERRORS OR OMISSIONS CONTAINED HEREIN, NOR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM THE FURNISHING, PERFORMANCE, OR USE OF THIS MATERIAL.
This guide contains information protected by copyright. No part of this guide may be photocopied or reproduced in any form without prior written consent from Compaq Computer Corporation.
© 1999 Compaq Computer Corporation. All rights reserved. Printed in the U.S.A.
Compaq and Presario are registered in the U. S. Patent and Trademark Office.
Microsoft, MS-DOS, Windows and Windows NT are registered trademarks of Microsoft Corporation.
Windows 98 is a trademark of Microsoft Corporation.
The software described in this guide is furnished under a license agreement or nondisclosure agreement. The software may be used or copied only in accordance with the terms of the agreement.
Product names mentioned herein may be trademarks and/or registered trademarks of their respective companies.
Maintenance and Service Guide
Compaq Presario 305 Model Portable Computers
First Edition (July 1999)
Compaq Computer Corporation
Presario 305 Model
Before You Begin |
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Specifications |
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Parts Catalog |
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Removal Sequence |
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Troubleshooting |
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Battery Operations |
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Index |
Product Description |
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Pin Assignments |
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Preface
This Maintenance and Service Guide is a troubleshooting reference that can be used when servicing the Compaq Presario 305 Model Portable Computers. Compaq Computer Corporation reserves the right to make changes to the Compaq Presario 305 Model Portable Computers without notice.
Symbols
The following words and symbols mark special messages throughout this guide.
WARNING: Text set off in this manner indicates that failure to follow directions in the warning could result in bodily harm or loss of life.
CAUTION: Text set off in this manner indicates that failure to follow directions could result in damage to equipment or loss of data.
IMPORTANT: Text set off in this manner presents clarifying information or specific instructions.
NOTE: Text set off in this manner presents commentary, sidelights, or interesting points of information.
Technician Notes
WARNING: Only authorized technicians trained by Compaq should repair this equipment. All troubleshooting and repair procedures are detailed to allow only subassembly/module level repair. Because of the complexity of the individual boards and subassemblies, the user should not attempt to make repairs at the component level or to make modifications to any printed circuit board. Improper repairs can create a safety hazard. Any indications of component replacement or printed circuit board modifications may void any warranty.
WARNING: The computer is designed to be electrically grounded. To ensure proper operation, plug the AC power cord into a properly grounded electrical outlet only.
CAUTION: To properly ventilate the system, you must provide at least 3 inches (7.62 cm) of clearance on the left and right sides of the computer.
Serial Number
When requesting information or ordering spare parts, the computer serial number should be provided to Compaq. The serial number is located on the
bottom of the computer.
Locating Additional Information
The following documentation is available to support this product:
●Compaq Presario 305 Model Portable Computer documentation set
●Introducing Windows 98 Guide
●Compaq Service Training Guides
●Compaq Service Advisories and Bulletins
●Compaq QuickFind
●Compaq Service Quick Reference Guide
●Compaq Internet site at http://Compaq.com
Presario 305 Model
Before You Begin |
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Specifications |
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Removal Sequence |
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Troubleshooting |
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Product Description |
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Pin Assignments |
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Product Description
Models and
Features
Upper Unit
Components
Front
Components
Left Side
Components
Right Side
Components
Bottom of
Unit
Rear
Connectors
Multi-media
Expansion
Unit
Power
Management
for Windows
98
Parts Catalog
Battery Operations
Index
The Compaq Presario 305 Computer provides industryleading features in a uniquely designed ultraportable. The ultralight 3.1 to 3.3 pound (1.4 to 1.5 kg) notebook (depending on configuration) allows users high mobility and provides a full set of system ports. When paired with the Mobile Expansion Unit (MEU), the Presario 305 can transform into an All-In- One portable computer with CD-ROM or DVD and floppy functionality.
Presario 305 Model
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Specifications |
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Parts Catalog |
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Removal Sequence |
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Troubleshooting |
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Battery Operations |
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Index |
Product Description |
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Pin Assignments |
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Models and Features
Models and
Features
Upper Unit
Components
Front
Components
Left Side
Components
Right Side
Components
Bottom of
Unit
Rear
Connectors
Multi-media
Expansion
Unit
Power
Management
for Windows
98
Compaq Presario 305 Model Portable Computer
Display |
11.3-inch Color TFT Display |
Processor |
333 MHz Celeron II (with 128k |
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integrated cache) |
Hard |
4.3 GB |
Drive |
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Total |
64 MB SDRAM |
System |
128 MB SDRAM Maximum |
Memory |
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CD Drive |
24x |
Modem |
56 Kbps, V.90 PCI |
Battery |
High Capacity Li Ion |
Video |
3D, ATI LT Pro 4 MB SGRAM |
Controller |
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Presario 305 Model
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Specifications |
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Parts Catalog |
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Removal Sequence |
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Troubleshooting |
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Battery Operations |
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Index |
Product Description |
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Pin Assignments |
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Upper Unit Components
Models and
Features
Upper Unit
Components
Front
Components
Left Side
Components
Right Side
Components
Bottom of
Unit
Rear
Connectors
Multi-media
Expansion
Unit
Power
Management
for Windows
98
1 
Display Release Latch
2 Display
3 
Hard Drive Light
4 Diskette Drive Light
5 
Scroll Lock Light
6 Caps Lock Light
7 
Num Lock Light
8 Standby Button
9 
Instant Internet Access Button 
10 Instant Search Access Button
11 
E-Commerce Button
12 Instant E-Mail Button
Presario 305 Model
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Specifications |
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Parts Catalog |
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Removal Sequence |
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Troubleshooting |
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Battery Operations |
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Index |
Product Description |
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Pin Assignments |
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Front Components
Models and
Features
Upper Unit
Components
Front
Components
Left Side
Components
Right Side
Components
Bottom of
Unit
Rear
Connectors
Multi-media
Expansion
Unit
Power
Management
for Windows
98
1
Battery Light
2Power/Suspend Light
3
Microphone Jack
4Stereo Speaker/Headphone Jack
5
Touch Pad
Presario 305 Model
Before You Begin |
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Specifications |
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Parts Catalog |
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Removal Sequence |
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Troubleshooting |
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Battery Operations |
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Index |
Product Description |
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Pin Assignments |
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Left Side Components
Models and |
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Features |
1 |
Power Connector |
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Upper Unit |
2 |
Power Button |
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Components |
3 |
Security Cable Slot |
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Front |
4 |
Hard Drive Bay |
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Components |
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Left Side
Components
Right Side
Components
Bottom of
Unit
Rear
Connectors
Multi-media
Expansion
Unit
Power
Management
for Windows
98
Presario 305 Model
Before You Begin |
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Specifications |
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Removal Sequence |
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Troubleshooting |
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Product Description |
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Pin Assignments |
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Right Side Components
Models and
Features
Upper Unit
Components
Front
Components
Left Side
Components
Right Side
Components
Bottom of
Unit
Rear
Connectors
Multi-media
Expansion
Unit
Power
Management
for Windows
98
Parts Catalog
Battery Operations
Index
1 
PC Card Slot
2PC Card Eject Lever
3Air Intake/Exhaust Vents
4Modem Connector (RJ-11 jack)
Presario 305 Model
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Specifications |
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Parts Catalog |
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Removal Sequence |
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Troubleshooting |
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Battery Operations |
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Index |
Product Description |
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Pin Assignments |
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Bottom of Unit
Models and
Features
Upper Unit
Components
Front
Components
Left Side
Components
Right Side
Components
Bottom of
Unit
Rear
Connectors
Multi-media
Expansion
Unit
Power
Management
for Windows
98
1 
Battery Latches
2 
Real-time Clock Battery
3Bottom of fan (Fan removable from inside only)
4 
Speaker
5 
Modem Compartment
6 
220-pin Docking Connector 
Presario 305 Model
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Specifications |
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Parts Catalog |
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Removal Sequence |
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Troubleshooting |
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Battery Operations |
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Index |
Product Description |
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Pin Assignments |
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Rear Connectors
Models and
Features
Upper Unit
Components
Front
Components
Left Side
Components
Right Side
Components
Bottom of
Unit
Rear
Connectors
Multi-media
Expansion
Unit
Power
Management
for Windows
98
1 
USB Connector
2 
Serial Connector
3 
Parallel Connector
4External Monitor Connector
5 
Infrared Port
6 
Battery Pack
Presario 305 Model
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Specifications |
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Parts Catalog |
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Removal Sequence |
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Troubleshooting |
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Battery Operations |
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Index |
Product Description |
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Pin Assignments |
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Multi-media Expansion Base
Models and
Features |
1 |
Docking Alignment Tabs |
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Upper Unit |
2 |
Docking Connector |
Components |
3 |
Audio output |
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Front |
4 |
Audio input |
Components |
5 |
Docking Release Button |
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Speaker |
Left Side |
6 |
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Components |
7 |
Multibay Eject Lever |
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8 |
CD or DVD |
Right Side |
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Components |
9 |
Diskette Drive |
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Bottom of
Unit
Rear
Connectors
Multimedia Expansion Unit
Power
Management
for Windows
98
Presario 305 Model
Before You Begin |
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Specifications |
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Parts Catalog |
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Removal Sequence |
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Troubleshooting |
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Battery Operations |
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Index |
Product Description |
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Pin Assignments |
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Power Management for Windows 98
The following power management features are available for conserving AC power and extending battery operating time:
●Power Management Settings
●Sleep
●Hibernation
●Battery operating time
●Rebooting After a Lockup
●Servicing Your Computer - Full Off Mode
Power Management Settings
Depending on your patterns of computer use, you can set different levels of power management. These different power management levels can be activated based on the amount of time passed since the last system activity. System activity examples include keyboard or mouse movement, CD or DVD playback (while under program control that monitors Sleep), and modem use.
Each of the following system components can be made to go to sleep after periods of inactivity:
●system (goes into Sleep (Standby) mode)
●screen (times out and goes blank)
●hard drive (spins down)
You can select different conditions or power schemes through Power Management.The optional settings are Home/Office Desk, Portable/ Laptop, and Always On. From the default settings, you can change the delay time settings. Note: the setting for hard drive must be less than or equal to the setting for System.
IMPORTANT: If you're on a network, it's recommended that you set
System Standby to Never.
There are five categories of power management settings under the Control Panel. The default setting for each feature is listed below in the tables.
Power Management Properties
Power Schemes: |
Plugged in |
Running on Batteries |
Always on System Standby: |
Never |
15 minutes |
Turn OFF Monitor |
After 15 minutes |
After 10 minutes |
Always on System Standby: |
After 15 minutes |
After 10 minutes |
ALARMS: |
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Low Battery Alarm: |
10% |
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Critical Battery Alarm: |
0% |
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Alarm Actions: |
X Display Message Notification |
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Text Action |
No Action |
POWER METER: |
Default |
ADVANCED: |
Default |
Display Properties
Monitor: Laptop Display (Maximum resolution according to unit display size)
Sleep
You can select Sleep mode instead of turning off the computer when you have finished using it. This allows the computer to wake up faster than turning it completely off and saves power over the active (On) mode. Compaq Presario Notebook computers have two levels of sleep, Hibernation and Sleep.
Hibernation - by pushing the power button once your computer will perform a save to disk followed by a shut down of the computer into Off mode.
Sleep - is a low power mode, also referred to as Standby mode. While in Sleep mode, your computer will maintain system information and open files. Unsaved information will be lost if you turn off your system prior to system wake-up, or if you lose power while using the AC adapter.
CAUTION: While in Sleep mode, your computer will maintain system information and open files. Unsaved information will be lost if you turn off your system prior to system wake-up, or if you lose power while using the AC adapter.
Hibernation Mode
Hibernation helps conserve battery life and protects your data. Hibernation can be a routine power saving event, or can be the result of a low battery condition. As it enters Hibernation your computer will display a progress screen, as it automatically saves the machine state before it shuts down and turns itself off. Your computer will automatically go into Hibernation, when the battery has little power left, or when the system (operating on battery power) has been in Sleep mode for more than an hour. You can also manually initiate Hibernation by pressing the power button once while the system is active. To restore the computer's previous state, simply press the power button once again. While waking up, the computer will display a progress screen.
The following table shows the conditions and indicators for getting in and out of the various power management modes, Sleep, Hibernation, and Off.
Mode |
To Initiate |
To End |
Indicators |
Sleep |
Manual keys Standby button |
Standby |
Flashing green |
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button |
Power LED |
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Time Out Default 15 minutes. If on Battery |
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power (system will not go to Sleep if on AC |
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power) |
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Hibernate |
Manual - Slide Power Switch once |
Slide Power |
No Power LED, |
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Time Out Default If low battery or after 1 hour |
Switch once |
blank screen |
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of sleep (system will not Hibernate if on AC |
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power) |
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Off |
Perform normal Windows shutdown via the |
Slide Power |
No Power LED, |
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start button, or press and hold down the |
Switch once |
blank screen |
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power button for 4 seconds |
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Servicing Your Computer - Full Off Mode
If you need to install or replace components in your system, you must turn the computer off completely. Follow the instructions above for properly putting the computer into Off mode, unplug from the outlet, and remove the battery (see battery section for instructions on removing battery).
Rebooting After a Lockup
Occasionally you may encounter a frozen keyboard or a locked screen. To reboot your computer (as if from a cold start) slide and hold down the Power Switch for at least four seconds, which will cause a manual shutdown. Then, restart it with a single slide of the Power Switch. If it still doesn't recover, slide the Power Switch and hold it for four seconds to shut it down, then, remove the battery or unplug the AC power for at least 30 seconds. Reinsert the battery or reconnect AC power and slide the Power Switch once to reboot.
Battery Operating Time
Battery operating time is affected by variables, such as the following:
●Power conservation settings
●Hardware configuration
●Software applications
●Installed options
●Display brightness
●Hard drive usage
●Power button
●Changes in operating temperature
●Type and number of installed PC Cards
For more information on increasing battery pack operating time, conditioning the battery pack, and disposing of a used battery pack, refer to the Battery Pack Operations.
Compaq Presario Series Maintenance and Service Guide
Presario 305 Model
Before You Begin |
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Specifications |
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Removal Sequence |
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Troubleshooting |
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Product Description |
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Pin Assignments |
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Removing the Battery Pack
Removal
Sequence
Serial Number
Location
Preparing for
Disassembly
Electrostatic
Discharge
Service
Considerations
Cables and
Connectors
Multi-media
Expansion
Unit
Battery Pack 
Hard Drive
Modem Card
RTC Battery
Keyboard
Memory Board
Switch Cover
Display Panel
Deck
Voltage
Converter
Board
Modem
Connector
Board
PC Card
PC Card
Assembly
System Board 
privacy and legal statement
United States December 9, 2002
Parts Catalog
Battery Operations
Index
To remove the battery pack, complete the following steps:
WARNING:To reduce the risk of injury or damage to the battery pack, do not crush, puncture, or incinerate the battery pack or short the metal contacts. Do not attempt to open or service the battery pack.
1. Remove the Multi-
media Expansion Unit.
2.Turn the computer bottom side up and tilt the battery pack so it lies flat (covering all the ports on the back of the computer).
3.Slide the two
battery latches toward the center of the computer.
Next Step
http://h18000.www1.hp.com/athome/support/msgs/305/battre1.html [12/9/2002 2:16:25 PM]
Compaq Presario Series Maintenance and Service Guide
United States December 9, 2002
Presario 305 Model
Before You Begin |
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Specifications |
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Parts Catalog |
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Removal Sequence |
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Troubleshooting |
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Battery Operations |
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Index |
Product Description |
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Pin Assignments |
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Removing the Battery Pack (continued)
4. Rotate the battery pack into a vertical position 1, and lift up the battery pack from the computer 2.
To replace the battery pack, reverse the removal procedures.
WARNING: To prevent damage to the computer, do not insert a battery pack until the computer is fully reassembled.
Back to step 1
privacy and legal statement
http://h18000.www1.hp.com/athome/support/msgs/305/battre3.html [12/9/2002 2:16:32 PM]
Compaq Presario Series Maintenance and Service Guide
United States December 9, 2002
Presario 305 Model
Before You Begin |
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Specifications |
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Parts Catalog |
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Removal Sequence |
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Troubleshooting |
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Battery Operations |
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Index |
Product Description |
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Pin Assignments |
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Removing the Multi-media Expansion unit
Removal
Sequence
Serial Number
Location
Preparing for
Disassembly
Electrostatic
Discharge
Service
Considerations
Cables and
Connectors
Multi-media
Expansion
Unit
Battery Pack
Hard Drive
Modem Card
RTC Battery
Keyboard
Memory Board
Switch Cover
Display Panel
Deck
Voltage
Converter
Board
Modem
Connector
Board
PC Card
PC Card
Assembly
System Board 
To remove the Multimedia Expansion
Unit, complete the following steps:
1.Prepare the computer for disassembly.
2.Turn off and disconnect all external devices connected to the computer.
3.On the Multi-media Expansion Unit, press the docking release button
1 to release
the expansion unit from the computer.
4. Lift the back end of the computer to disconnect it from the
expansion unit
2.
5. Pull the computer away from the
expansion unit 3.
To replace
the Multimedia Expansion
Unit,
reverse the removal procedures.
privacy and legal statement
http://h18000.www1.hp.com/athome/support/msgs/305/wedgrem.html [12/9/2002 2:16:36 PM]
Compaq Presario Series Maintenance and Service Guide
United States December 9, 2002
Presario 305 Model
Before You Begin |
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Specifications |
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Parts Catalog |
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Removal Sequence |
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Troubleshooting |
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Battery Operations |
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Index |
Product Description |
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Pin Assignments |
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Serial Number Location
Removal
Sequence
Serial
Number
Location
Preparing for
Disassembly
Electrostatic
Discharge
Service
Considerations
Cables and
Connectors
Multi-media
Expansion
Unit
Battery Pack
Hard Drive
Modem Card
RTC Battery
Keyboard
Memory Board
Switch Cover
Display Panel
Deck
Voltage
Converter
Board
Modem
Connector
Board
PC Card
PC Card
Assembly
System Board 
privacy and legal statement
Report the serial number to Compaq when requesting information on ordering spare parts, located on the underside of the unit.
http://h18000.www1.hp.com/athome/support/msgs/305/serloc.html [12/9/2002 2:16:42 PM]
Compaq Presario Series Maintenance and Service Guide
United States December 9, 2002
Presario 305 Model
Before You Begin |
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Specifications |
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Parts Catalog |
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Removal Sequence |
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Troubleshooting |
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Battery Operations |
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Index |
Product Description |
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Pin Assignments |
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Preparing for Disassembly
Removal
Sequence
Serial Number
Location
Preparing for Disassembly
Before removing or replacing any components, the following procedures must be completed:
1.Disconnect AC power and any external devices.
2.Remove the battery pack.
3.Remove any PC Cards.
Electrostatic
Discharge
Service
Considerations
Cables and
Connectors
Multi-media
Expansion
Unit
Battery Pack
Hard Drive
Modem Card
RTC Battery
Keyboard
Memory Board
Switch Cover
Display Panel
Deck
Voltage
Converter
Board
Modem
Connector
Board
PC Card
PC Card
Assembly
System Board 
WARNING: Metal objects can damage the battery pack as well as the battery contacts in the battery compartment. To prevent damage, do not allow metal objects to touch the battery contacts. Place only the battery pack for the Compaq Presario 305 Model Portable Computers into the battery compartment. Do not force the battery pack into the bay if insertion does not occur easily.
CAUTION: Do not crush, puncture, or incinerate the battery pack. Do not open a battery pack, as this damages the pack, makes it unusable, and exposes potentially harmful battery components. There are no fieldserviceable parts located inside the battery pack.
CAUTION: Failure to disconnect the AC Adapter from the computer and remove the battery pack before removing and installing internal components can damage the equipment.
The Compaq Presario 305 Model Portable Computer has several screws of various sizes which are not interchangeable. Care must be taken
NOTE: during reassembly to ensure that the correct screws are used in their appropriate locations. During removal please keep screws with their associated sub-assembly.
privacy and legal statement
http://h18000.www1.hp.com/athome/support/msgs/305/prepdis.html [12/9/2002 2:16:44 PM]
Compaq Presario Series Maintenance and Service Guide
United States December 9, 2002
Presario 305 Model
Before You Begin |
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Specifications |
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Parts Catalog |
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Removal Sequence |
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Troubleshooting |
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Battery Operations |
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Index |
Product Description |
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Pin Assignments |
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Removal and Replacement Procedures
Electrostatic Discharge
A sudden discharge of static electricity from a finger or other conductor can destroy static-sensitive devices or microcircuitry. Often the spark is neither felt nor heard, but damage occurs. An electronic device exposed to electrostatic discharge (ESD) may not be affected at all and will work perfectly throughout a normal cycle. Although, it may function normally for a while, then degrade in the internal layers, reducing its life expectancy.
Networks built into many integrated circuits provide some protection, but in many cases, the discharge contains enough power to alter device parameters or melt silicon junctions.
Generating Static
The table shows how different activities generate static electricity and at different electrostatic voltage levels.
Typical Electrostatic Voltages |
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Relative Humidity |
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Event |
10% |
40% |
55% |
Walking across carpet |
35,000 V |
15,000 V |
7,500 V |
Walking across vinyl floor |
12,000 V |
5,000 V |
3,000 V |
Motions of bench worker |
6,000 V |
800 V |
400 V |
Removing DIPS from plastic tubes |
2,000 V |
700 V |
400 V |
Removing DIPS from vinyl trays |
11,500 V |
4,000 V |
2,000 V |
Removing DIPS from Styrofoam |
14,500 V |
5,000 V |
3,500 V |
Removing bubble pack from PCBs |
26,500 V |
20,000 V |
7,000 V |
Packing PCBs in foam-lined box |
21,000 V |
11,000 V |
5,000 V |
NOTE: 700 volts can degrade a |
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product. |
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Static-Shielding Materials |
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Material |
Use |
Voltage Protection Level |
Antistatic Plastic |
Bags |
1,500 V |
Carbon-loaded plastic |
Floor mats |
7,500 V |
Metallized laminate |
Floor mats |
15,000 V |
Return to Removal & Replacement Procedures
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http://h18000.www1.hp.com/athome/support/msgs/305/electro.html [12/9/2002 2:16:48 PM]
Presario 305 Model
Before You Begin |
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Specifications |
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Parts Catalog |
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Removal Sequence |
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Troubleshooting |
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Battery Operations |
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Index |
Product Description |
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Pin Assignments |
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Removal and Replacement Procedures
This section explains the removal and replacement procedures for the computer.
Removal
Sequence
Serial Number
Location
Preparing for
Disassembly
Electrostatic
Discharge
Service
Considerations
Cables and
Connectors
Multi-media
Expansion
Unit
Battery Pack
Hard Drive
Modem Card
RTC Battery
Keyboard
Memory Board
Switch Cover
Display Panel
Deck
Voltage
Converter
Board
Modem
Connector
Board
PC Card
PC Card
Assembly
System Board 
Report the computer serial number, located on the bottom of the unit, when requesting information or ordering spare parts from Compaq.
Presario 305 Model
Before You Begin |
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Specifications |
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Parts Catalog |
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Removal Sequence |
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Troubleshooting |
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Battery Operations |
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Index |
Product Description |
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Pin Assignments |
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Service Considerations
Listed below are some of the considerations that you should keep in mind during the disassembly and reassembly of the computer.
Tool and Software Requirements
To service the computer, you need the following:
●Compaq screwdriver kit
●Torx T-8 screwdriver
●3/16-inch and 5mm nut drivers (for screwlocks and standoffs)
●Small, standard screwdriver
●Small, Phillips screwdriver
●Diagnostics software
Screws
The screws used in the computer are not interchangeable. If an incorrect screw is used during the reassembly process, it can damage the unit. Compaq strongly recommends that all screws removed during disassembly be kept with the part that was removed, then returned to their proper locations.
Fan and RJ11
The Fan and RJ11 are spared with the base assembly. They are not available separately, and may only be obtained by ordering the entire base assembly. This Maintenance and Service Guide contains no removal and replacement procedures for these components.
As each subassembly is removed from the computer, IMPORTANT: it should be placed away from the work area to
prevent damage.
Return to Removal & Replacement Procedures
Presario 305 Model
Before You Begin |
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Specifications |
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Parts Catalog |
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Removal Sequence |
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Troubleshooting |
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Battery Operations |
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Index |
Product Description |
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Pin Assignments |
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Cables and Connectors
Most cables used throughout the unit are ribbon cables. Cables must be handled with extreme care to avoid damage. Apply only the tension required to seat or unseat the cables during insertion or removal from the connector. Handle cables by the connector whenever possible. In all cases, avoid bending, twisting, or tearing the cables, and ensure that the cables are routed in such a way that they cannot be caught or snagged by parts being removed or replaced.
Use the following precautions when handling cables to avoid damage to the cable or computer:
●Always handle cables by their connectors.
●Avoid bending, twisting, or pulling on the cables.
●Apply minimum required force when seating or unseating the cables from their connectors.
●Place the cables in such a manner that they cannot be caught or snagged by parts being removed or replaced.
●Handle flex cables with extreme care; they can tear easily.
CAUTION: When servicing these computers, ensure that cables are placed in their proper location during the reassembly process. Improper cable placement can cause severe damage to the unit.
Removing a cable from a ZIF Connector
Display panel cable location
Inverter cable location
Audio cable location
Touchpad cable location
Fan cable location
Light board cable location
Speaker cable location
Battery cable location
Plastic Parts
Plastic parts can be damaged by the use of excessive force during disassembly and reassembly. When handling the plastic parts, use care. Apply pressure only at the points designated in the maintenance instructions.
Return to Removal & Replacement Procedures
Maintenance & Service Guide
Presario 305 Model
MSG Index | Home Page | Notice | Preface | Product Description | Troubleshooting Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications Pin Assignments | Battery Pack Operations
ZIF Connectors
The computer uses a zero insertion force (ZIF) connector for several cable connections on the system board. To remove a ZIF cable from its connector, pull both ends of the ZIF cable guide clasp out of the sleeve about 0.05 - 0.1" (1 - 2 mm), then gently slide the cable out.
CAUTION: A ZIF connector and its attached cable can be easily damaged. Never pull or twist on the cable while it is connected.
CAUTION: Ensure that cables are replaced in their proper location. Improper cable placement can damage the computer.
Back to Cables and Connectors.
Presario 305 Model
Before You Begin |
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Specifications |
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Parts Catalog |
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Removal Sequence |
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Troubleshooting |
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Battery Operations |
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Index |
Product Description |
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Pin Assignments |
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Display Panel
Cable
Location
Note the location of the display panel cable.
Back to Cables and Connectors.
Presario 305 Model
Before You Begin |
|
Specifications |
|
Parts Catalog |
|
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|
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|
Removal Sequence |
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Troubleshooting |
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Battery Operations |
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Index |
Product Description |
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Pin Assignments |
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Inverter
Cable
Location
Note the location of the inverter cable.
Back to Cables and Connectors.
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