Introduction

This appendix contains connector pinout data for the Extensa 450 Series Notebook Computers. Table B-1 PS 2 Mouse Keyboard Port (J2) Pin Assignments Table B-2 Parallel Port (J3) Pin Assignments Table B-3 LCD VR Board Connector Pin Assignments Table B-4 SIR Connector (J8) Pin Assignments Table B-5 LCD Signal Connector (J12) Pin Assignments Table B- 6 FDD Connector (J11) Pin Assignments Table B- 7 PCMCIA Connector (J21) Pin Assignments

Required Tools and Equipment

All notebook computer corrective maintenance procedures can be performed using the following tools Tweezers Small flat-blade screwdriver Small Phillips screwdriver Hexagonal Screwdriver Plastic Stick Caution All boards, options and peripherals contain components that are sensitive to static electricity. When handling any of these items, protect against static electricity by using wrist or ankle grounding straps and grounded working mats. When moving or storing items, use the antistatic bags...

Notebook Field Replaceable Parts and Assemblies

All members of the Extensa 450 Series Notebook Computers contain two major assemblies including the Cover Display Assembly (upper half of notebook computer) and the System Base Assembly (lower half of the notebook). Each of these two assemblies contain FRUs as described in the following subparagraphs. As shown in Figure 6-1, the Cover-Display Assembly contains the LCD screen, Power Inverter Board, and Converter Board.,The DSSTN models also include a Slide Pot Board (not used with the TFT...

Installing the AC Power Adapter

Use the following procedures to connect the AC Adapter to the system c Caution Use only the AC Adapter supplied with the computer other adapters can damage the unit. 1. Remove the AC adapter from the packaging. Connect the round coaxial connector supplied with the notebook to the power receptacle on the rear of the notebook as shown in Figure 2-10. 2. Connect the female side of the AC Power cord to the AC Adapter and connect the male end to a grounded AC outlet.

Installing Notebook Options

If you have no options to install at this time, skip to Paragraph 2.3. Otherwise, continue with Paragraph 2.2.1. 2.3.1 Installing Dual Inline Memory Module(s) Note If not installing RAM Expansion option at this time, skip to the next paragraph. Caution The Dual Inline Memory Module contains components that are sensitive to static electricity. When handling the module and the internal parts of the computer, protect against static electricity by using wrist or ankle grounding straps and grounded...

Overview of Fault Isolation Process

The fault isolation process (summarized in Figure 5-1) consists of the following Quick Check of the following Notebook power system (including battery packs and AC Adapter connections)- See Paragraph 5.4. Switch settings (ensure Power switch is On, and press Standby switch to ensure that Notebook is not in Standby mode press Shift to ensure the notebook is not in Auto-Suspend mode. All external cabling (if any) Check LCD Contrast adjustment (Dual Scan version only) Record and attempt to resolve...

Unpacking Instructions

The packaging diagram for the notebook computer is shown in Figure 2-1. Unpack the computer using the following instructions 1. Carefully cut the tape that seals the top flap of the shipping carton. 2. Remove the computer and the accessories from the main shipping carton. 3. Remove all protective coverings from the computer. 4. Remove the holding tape and open up the accessory box remove the contents. Note Save the shipping containers and packaging for later reuse.

Installing the Battery Packs

The standard configuration of the Extensa Notebook is equipped with a single battery pack that is inserted from the front right side of the computer. However, if you can do without the Floppy Drive, you can use the floppy drive bay to house a second Lithium Ion battery pack. To remove or replace the battery pack, follow the steps below. 1. Power off the notebook, being sure to save your data first. 2. Locate the battery door (right side of notebook near the front). Press the battery door...

Preventive Maintenance

Preventive maintenance is limited to cleaning the plastic case, the keyboard, and the display screen. When it is necessary to clean the plastic case and keyboard, use a soft, lint-free cloth, slightly dampened with a mild detergent solution or use the contents of any commercially available computer cleaning kit. Caution Never use alcohol, petroleum-based solvents, or harsh detergents to clean your computer. Also never spray any liquids directly on the computer case, keyboard, or screen. If the...

Installing External Devices

Most external devices connect to the Notebook via the connectors on the rear of the notebook and on the rear of the Port Adapter supplied with the notebook see Figure 2-5 for port assignments . External PS 2 Port Mouse Keyboard Port 2.5.1 Installing an External Keyboard Mouse As shown in Figure 2-6, the notebook has provisions for two external PS 2 compatible devices keyboard, mouse, etc. that may be attached to the notebook. The pinouts for the 6-pin Mini-DIN connectors are also provided in...

Notebook Assemblies and Subassemblies

Extensa 450 Hdd

The Extensa Series Notebooks are modular in design and can be disassembled for maintenance purposes using a standard set of flat-bladed, Phillips-head and hexagonal screwdrivers. The major assemblies that comprise a typical notebook in the Extensa family are shown in Figure 1-7 and briefly described in the following paragraphs. SIR Board Floppy Drive Secondary Battery SIR Board Floppy Drive Secondary Battery Memory Module Assembly Assembly Memory Module Assembly Assembly The Cover-Display...

Operating Procedures

Some of the operating features useful for notebook maintenance are provided in the following paragraphs. For additional operating instructions, refer to the Extensa 450 Series Notebook Computer User's Manual, Texas Instruments Part No. 9803942-0001. 3.3.1 Floppy Drive Operating Procedures To avoid damaging the floppy drive drive, and to protect data, take the following precautions Never turn off or reset the notebook while the floppy activity indicator is lit. Keep the AC adapter at least 6...

Notebook Subassembly Removal and Replacement Procedures

The following paragraphs contain field service-level removal replacement procedures for the Notebook. Caution Prior to removing any of the internal FRUs in the notebook, remove the AC Adapter, battery, floppy and hard drives and all external options installed on the notebook. 6.5.1 Removing Replacing the Notebook Battery Pack The procedure for removing and replacing the battery pack s is as follows 2. Locate the battery door right side of notebook near the front see Figure 6-3 . Press the...

Notebook Controls and Indicators

Acer Travelmate 4740 Right Side Corner

The Extensa Series Notebooks are equipped with the following controls and indicators Group of five LEDs just above the keyboard Sleep Mode, Hard Drive Activity, Num Lock, Caps Lock and Scroll Lock Power, Setup, and Standby Suspend buttons adjacent to the status LEDs Single Power LED on the leftrear corner of the notebook Touch Pad and two select buttons at base of keyboard Contrast Switch on Display Assembly Dual Scan models only These controls and indicators are shown in Figure 3-1 and...

Notebook Functional Description

Functionally, the notebook computer consists of the following major subsystems Processor and Memory Subsystem A functional block diagram of the Extensa Notebook is shown in Figure 4-1. The Processor function, housed on the Main Board, is implemented with a 75mhz IntelDX4 Processor. The processor operates in conjunction with RAM and ROM Memory on the Memory Board and other control logic on the Main Board to process software instructions BIOS, Windows 95, and Applications . Primary control for...

Product Overview

All members of the Extensa 450 Series are high performance notebooks powered by the 75MHz IntelDX4 processor and Windows 95 tm Operating System software. As a standard feature, all members of the Extensa 450 family also contain the 4MB of RAM memory user-expandable to 32MB 128 bytes of battery-backed up CMOS RAM 340 Million Byte Hard Drive user replaceable Support for one PCMCIA Type I or II option Type III if floppy drive is removed with option Ergonomic keyboard with palm rest 2.7 mm travel...

Troubleshooting Procedures

The built-in self test program and the disk resident diagnostics program PC-Doctor are useful tools in computer troubleshooting. However, if the computer has a power, keyboard or display problem, you first solve this problem before running diagnostics. If the computer powers up and displays messages on the LCD or emits a series of beeps, skip to Paragraph 5.4.3 for further instructions. 5.3.1 Troubleshooting a Power Supply Problem If the computer does not power up when the Power Switch is set...