Acer 721TX Service Guide
Acer 721TX - TravelMate - PII 333 MHz Manual
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UPC - 099802024840
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- Acer 721TX | Service Guide - Page 1
Travel Mate 720 Service Guide Service guide files and updates are available on the AIPG/CSD web; for more information, please refer to http://csd.acer.com.tw PART NO.: 49.42C01.001 DOC. NO.: SG295-9803A PRINTED IN TAIWAN - Acer 721TX | Service Guide - Page 2
by any means, electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without the prior written permission of Acer Incorporated. Disclaimer The information in this guide is subject to change without notice. Acer Incorporated makes no representations or warranties, either expressed - Acer 721TX | Service Guide - Page 3
Conventions The following conventions are used in this manual: Screen messages NOTE WARNING CAUTION IMPORTANT Denotes actual messages Gives precautionary measures to avoid possible hardware or software problems. Reminds you to do specific actions relevant to the accomplishment of procedures. III - Acer 721TX | Service Guide - Page 4
Preface Before using this information and the product it supports, please read the following general information! 1 This Service Guide provides you with all technical information relating to the BASIC CONFIGURATION decided for Acer's "global" product offering. To better fit local market requirements - Acer 721TX | Service Guide - Page 5
Table of Contents Chapter 1 System Specifications Major Features 1 System 1 Connectivity 1 Display 2 Video Performance 2 Simultaneous Display 2 Dual Display 2 Power Management 2 Opening and Closing the Display 3 Indicators 4 Keyboard 5 Special Keys 5 I/O Ports 10 Rear Ports 10 Right - Acer 721TX | Service Guide - Page 6
Memory 57 Disassembling the CD-ROM Drive 58 Removing the Hard Disk Drive 59 Disassembling the Hard Disk Drive 59 Removing and Replacing the Card 77 Disassembling the LCD 78 Chapter 4 Troubleshooting Diskette Drive Checkout 83 CD-ROM Driver Test 83 Keyboard or Auxiliary Input Device Checkout - Acer 721TX | Service Guide - Page 7
and Configuration Appendix B Test Compatible Components List PCMCIA 124 PCMCIA Cards Tested for Year2000 Compliance 125 Long Run 126 Year2000 Compliance Test 126 Appendix C Online Support Information Index VII - Acer 721TX | Service Guide - Page 8
Table of Contents VIII - Acer 721TX | Service Guide - Page 9
drive 6 High-capacity, Enhanced-IDE removable hard disk 6 Lithium-Ion battery pack 6 Power management system 6 16-bit high-fidelity PCI stereo audio with 3-D sound and wavetable synthesizer 6 Built-in dual speakers and echo-cancelling microphone 6 S-video ) with Zoomed Video (ZV) support 6 DockMate V - Acer 721TX | Service Guide - Page 10
quality and desktop performance graphics. The computer supports a Thin-Film Transistor (TFT) liquid crystal display (LCD) displaying 16-bit hi-color at 1024x768 Extended Graphics Array (XGA) resolution. Video Performance PCI local bus video with industry-leading 256-bit graphics acceleration and - Acer 721TX | Service Guide - Page 11
Opening and Closing the Display To open the display, slide the display cover latch to the left and lift up the cover. Then tilt it to a comfortable viewing position. The computer employs a microswitch that turns off the display (and enters standby mode) to conserve power when you close the display - Acer 721TX | Service Guide - Page 12
Description Lights when the computer is on. Standby Lights when the computer enters Standby mode. Media Activity Lights when the floppy drive, hard disk or CD-ROM drive (or other AcerMedia Bay module) is active. Battery Charge Caps Lock Lights when the battery is being charged. Lights when Caps - Acer 721TX | Service Guide - Page 13
Keyboard The keyboard has full-sized keys and an embedded keypad, separate cursor keys, two Windows keys and twelve function keys. Special Keys Lock Keys The keyboard has three lock keys which you can toggle on and off. Lock Key Caps Lock Num Lock (Fn-F11) Scroll Lock (Fn-F12) Description When - Acer 721TX | Service Guide - Page 14
Embedded Numeric Keypad 6 The embedded numeric keypad functions like a desktop numeric keypad. It is indicated by small characters located on the upper right corner of the keycaps. To simplify the keyboard legend, cursor-control key symbols are not printed on the keys. Desired Access Number keys - Acer 721TX | Service Guide - Page 15
Windows Keys The keyboard has two keys that perform Windows-specific functions. Key Windows logo key Application key Description Start button. Combinations with this key performs special functions. Below are a few examples: + Tab (Activates next Taskbar button) áá + E (Explores My Computer) á + F - Acer 721TX | Service Guide - Page 16
the computer's control like screen contrast and brightness, volume output and the BIOS setup utility. To activate hot keys, press and hold the Fn key to resume. Otherwise, the computer enters Standby mode. Note: If ACPI support is enabled, pressing this key puts the computer in sleep mode. Turns - Acer 721TX | Service Guide - Page 17
Hot Key Fn+F7 Fn+F8 Fn+→ Icon Function Touchpad on/ off Speaker on/off Description Turns the internal touchpad on and off. Turns the speakers on and off; mutes the sound. Brightness up Increases the screen brightness. Fn+← Brightness down Decreases the screen brightness. Chapter 1 9 - Acer 721TX | Service Guide - Page 18
I/O Ports Rear Ports Icon Port Speaker-out jack Connects to... Speakers or headphones Line-in/Microphone-in jack Audio line-in device with a 3.5mm minijack (e.g., condenser microphone, audio CD player, stereo walkman). Serial port Serial device (e.g., serial mouse) Modem jack Phone line - Acer 721TX | Service Guide - Page 19
Icon Port DC-in jack Connects to... AC adapter and power outlet Fax/Data Modem Some models have a built-in V.90 56Kbps PCI fax/data modem. Note: This modem port is not compatible with - Acer 721TX | Service Guide - Page 20
Right Ports Icon Port PC Card slots Connects to... 16-bit PC Cards and 32-bit CardBus PC Cards (ZV- support) PS/2 port PS/2-compatible device (e.g., PS/2 keyboard/mouse/keypad). 12 System Specifications - Acer 721TX | Service Guide - Page 21
Bottom Port Icon Port Mini docking connector Connects to... DockMate V mini docking station Chapter 1 13 - Acer 721TX | Service Guide - Page 22
video RAM Video BIOS 64 KB system BIOS Extended memory 256 KB system ROM Interrupt channel default assignment Function Base memory Reserved Video BIOS System BIOS device Level trigger Pointing device Math coprocessor Hard disk driver Edge trigger Edge trigger Remarks Dynamically programmable - Acer 721TX | Service Guide - Page 23
default assignment Channel IRQ15 Default setting CD-ROM driver DMA channel default assignment mode Remarks Channel select Real-time clock and NMI mask DMA page register Interrupt controller-2 DMA controller-2 Hard disk select Audio (option) Audio (option) Audio (option) Audio (option) Parallel - Acer 721TX | Service Guide - Page 24
Device Video DAC Enhanced graphics adapter instruction cache and 16 KB data cache with MMX Technology 3. Quick Start for low power, low exit latency clock throttling" IMM module, 512KB L2 cache 1.8V 2.5V Item BIOS vendor BIOS Version BIOS ROM type BIOS ROM size BIOS package Support protocol BIOS - Acer 721TX | Service Guide - Page 25
System Memory Item Supported memory size per DIMM Supported maximum memory size Supported DIMM type Supported DIMM Speed Supported DIMM voltage Supported DIMM package DIMM Memory Combinations Specification 16/32/64/128 MB 256MB (128MB x 2) Synchronous DRAM SDRAM: With SPD without parity 3.3V 144- - Acer 721TX | Service Guide - Page 26
always enabled always enabled Fixed in Write-back Item Fixed or upgradeable Memory size Video Specification Fixed, built-in NM2200 video controller 2.5 MB item Chip vendor Chip name Chip voltage ZV port support (Y/N) Graph interface (ISA/VESA/PCI) Max. resolution (LCD) Max. resolution (Ext. CRT - Acer 721TX | Service Guide - Page 27
Transfer distance Compatible standard Output Radiant Intensity Half Angle Number of Irda ports 16550 UART support Specification 1 Rear side 25-pin D-type Enable/Disable by BIOS Setup Yes (set by BIOS setup) DMA channel 1 DMA channel 3 3E8h, 2E8h, 378h, 278h, Disabled IRQ5, IRQ7 Specification NS - Acer 721TX | Service Guide - Page 28
Sampling rate Internal microphone Internal speaker / Quantity MPU-401 UART support PCMCIA Item PCMCIA controller PCMCIA voltage controller Supported card type Number of slots Access location ZV (Zoomed Video) port support 32 bit CardBus support Fax/Modem Item Chipset Fax modem data baud rate (bps - Acer 721TX | Service Guide - Page 29
Fax/Modem Item Support modem protocol Modem connector type Modem connector location Keyboard Specification V.34 MFM Power Requirement Input Voltage (V) +5 +-10% 2HD (1.44M) 18 80 500 300 Hard disk drives Item Vendor & Model Name Specification IBM DCXA210000 IBM DADA26480 Chapter 1 21 - Acer 721TX | Service Guide - Page 30
Hard disk drives Drive Format Capacity (MB) Item Bytes per sector Logical heads 128 Enhanced IDE compatible CD-DA, CD-ROM, CD-ROM XA (except ADPCM), CD-I, Photo CD (Multisession), Video CD, CD+ Soft eject (with emergency eject hole) 5 Item Vendor & model name Battery Type Specification Sony BTP - Acer 721TX | Service Guide - Page 31
battery call Package configuration Package voltage (V) Charger 3200 3.7 8 2P-4S 14.8V Specification Item Vendor & model name Input voltage (from adapter, V) Output current (to DC/DC converter, A) Battery Low Voltage Battery Low 1 level (V) Battery Lower 2 level (V) Battery Low 3 level (V) Charge - Acer 721TX | Service Guide - Page 32
DC-DC Converter Item Specification OCP (Over Current 4~6 4~6 0.3~0. - - Protection, A) 4 DC-AC inverter is used to generate very high AC voltage, to support the LCD CCFT backlight user, and it is also responsible for the control of LCD brightness. Avoid touching the DC-AC inverter area - Acer 721TX | Service Guide - Page 33
~63 Maximum input current (A, @90Vac, full load) 1.5A Inrush current The maximum inrush current will be less than 50A and 100A when the adapter is connected to 115Vac (60Hz) and 230Vac(50Hz) respectively. Efficiency It should provide an efficiency of 83% minimum, when measured at maximum load - Acer 721TX | Service Guide - Page 34
AC Adapter Item Specification Electrostatic discharge (ESD, kV) +-15 (at air discharge) Dielectric withstand voltage Primary to secondary 3000 Vac (or 4242 Vdc), 10mA for 1 second Leakage - Acer 721TX | Service Guide - Page 35
following devices: keyboard, mouse, drive, hard disk, peripherals connected to the serial and parallel ports, and video memory. If no activity is detected . When the computer is using AC power and you disconnect the AC adapter from the computer, it automatically dims the LCD backlight to save power. - Acer 721TX | Service Guide - Page 36
Standby Mode The computer consumes very low power in Standby mode. Data remain intact in the system memory until the battery is drained. There are four ways to enter Standby mode: 6 Pressing the Standby hot key Fn-F3 6 Allowing the waiting time specified by the Standby Time-out value or the - Acer 721TX | Service Guide - Page 37
not consume any power). The computer saves all system information onto the hard disk before it enters Hibernation mode. Once you turn on the power, enabled. Warning: Do not change any devices (such as add memory or swap hard disks) when the computer is in Hibernation mode. Sleep Mode (ACPI) If ACPI - Acer 721TX | Service Guide - Page 38
jointly by Microsoft and Intel. An increasing number of software packages support APM to take advantage of its power-saving features and to allow APM under Windows 98, refer to your Windows 98 user's manual. Advanced Configuration and Power Interface Advanced Configuration and Power Interface - Acer 721TX | Service Guide - Page 39
computer comes preloaded with the following softwares: 6 Windows 98 or Windows NT operating system 6 Hardware BIOS setup utility 6 Support for LDCM (LANDesk Client Manager) 6 System utilities, drivers and application software Note: To access Windows 98 or Windows NT software applications, click on - Acer 721TX | Service Guide - Page 40
PhDISK The PhDISK utility allows your computer to enter Hibernation mode. Before entering Hibernation mode, your computer saves all necessary information into a file or partition created by PhDISK, then shuts off power to all system components. On the next start-up, the computer reloads the - Acer 721TX | Service Guide - Page 41
system setup program called Notebook Manager. The Windows-based Notebook Manager allows you to set passwords, the start-up sequence of the drives, and power management settings. It also shows current hardware configurations. Note: Certain hot key functions are disabled when you access the notebook - Acer 721TX | Service Guide - Page 42
table may differ slightly from the ones on-screen. Item CPU Total Memory Video RAM Hard Disk Serial Port 1 Parallel Port External Cache Touchpad Pointing Device Description Brand, external The current version of the computer's BIOS shows before the DeviceConfiguration table. 34 System Utilities - Acer 721TX | Service Guide - Page 43
devices in your computer and the order in which the booting sequence will occur. The devices include the following: 6 Floppy Drive 6 IDE Hard Drive 6 CD-ROM/DVD-ROM Drive (for bootable AcerMedia Bay modules) Simply drag and drop the devices to change the booting order. Then click on Apply to - Acer 721TX | Service Guide - Page 44
passwords used in the system: 6 Supervisor Password. The Supervisor Password prevents unauthorized access to sensitive parameters in the Notebook Manager and BIOS Utility. It also prevents unauthorized access to your computer at system start-up and at resume from Standby/Hibernation or Sleep mode - Acer 721TX | Service Guide - Page 45
your Supervisor Password. 4. Click in the Confirm Password textbox and retype the password. 5. Click on OK to set the new password. Note: To change a password, follow the same steps used to set a password. To remove a password, follow the same steps used to set a password but leave both textboxes - Acer 721TX | Service Guide - Page 46
Power Management Power Management is used to set various settings related to power management. This includes the following power-saving-related features: Item Enable modem ring resume on indicator Enable wake on LAN Enable battery low warning beep Enable sleep upon battery low Enable system resume - Acer 721TX | Service Guide - Page 47
Display Device Display Device is used to control various settings related to display device(s), such as the display brightness level. The items in this screen include: 6 Boot Display Device. Sets the default display device on boot-up. 6 Switching Display Device. Sets the current display device. - Acer 721TX | Service Guide - Page 48
Line-in/Microphone Line-in/Microphone is used to set the input source from the computer's linein/microphone-in jack. Click on the radio button of the desired item, then click on Apply to accept the setting. 40 System Utilities - Acer 721TX | Service Guide - Page 49
, you may need to run Setup. Please also refer to Chapter 6, Troubleshooting when a problem arises. To activate the Setup Utility, press F2 during POST (while the TravelMate logo is being displayed). Navigating the Setup Utility There are five menu options: Main, Advanced, Security, Power Saving - Acer 721TX | Service Guide - Page 50
Main The Main screen contains parameters involving basic computer settings and hardware information. 42 System Utilities - Acer 721TX | Service Guide - Page 51
) Shows the version number of the VGA BIOS. Format: Vx (version mumbers) Note: The BIOS versions are important information about your computer. If you experience computer problems and need to contact technical support, this data helps our service personnel know more about your computer. Chapter - Acer 721TX | Service Guide - Page 52
in this screen. Settings in boldface are the default and suggested parameter settings. Parameter Type Cylinder Heads Sectors/Track Maximum Capacity Description Sets the hard disk type. Options: Auto, User, CD-ROM, ATAPI Removable, IDE Removable or None Shows the number of cylinders of the - Acer 721TX | Service Guide - Page 53
in boldface are the default and suggested parameter settings. Parameter Type Description Sets the hard disk type. Options: Auto, User, CD-ROM, ATAPI Removable, IDE Removable or None Note: We suggest you set Type to Auto for hassle-free and correct AcerMedia Bay drive detection. Chapter 2 45 - Acer 721TX | Service Guide - Page 54
in this submenu. To set the boot sequence, use the plus/minus (+-) keys. Boot Devices Removable Devices Hard Drive ATAPI CD-ROM Drive Description Computer boots from a bootable diskette in the floppy drive. Computer boots from the hard disk. Computer boots from a bootable CD-ROM in the CD-ROM - Acer 721TX | Service Guide - Page 55
Advanced Caution: The parameters in this screen are for advanced users only. You do not need to change the values in this screen because these values are already optimized. The Advanced screen contains parameters that are related to computer hardware. The table below describes the parameters in - Acer 721TX | Service Guide - Page 56
Parameter Boot Display Description Sets the display on boot-up. When set to Auto, the computer automatically determines the display device. If an external display device (e.g., monitor) is connected, it becomes the boot display; otherwise, the computer LCD is the boot display. When set to Both, the - Acer 721TX | Service Guide - Page 57
The table below describes the parameters in this screen. Settings in boldface are the default and suggested parameter settings. Parameter Supervisor Password is User Password is Set Supervisor Password Set User Password Password on boot Password Check During Resume Description When set, this - Acer 721TX | Service Guide - Page 58
Setting a Password Follow these steps: 1. Set Password parameter (Supervisor or User) and press the Enter key. The set password box appears: 2. Type a password. The password may consist of up to seven alphanumeric (A-Z, a-z, 0-9) characters. Important: Be very careful when typing your password - Acer 721TX | Service Guide - Page 59
parameter settings. Note: If your system has ACPI, all power management functions are taken care of by Windows 98. Parameter LCD backlight Time-out Hard Disk Timeout Standby Timeout S2D Time-out Resume on LAN access Description Sets the time-out value before the display enters power saving mode - Acer 721TX | Service Guide - Page 60
Parameter Resume On Time Hotkey Beep Battery Low Warning Battery Low Suspend Description When enabled and the system resume date and time are valid, the computer resumes (wakes up) at the set time and date. Options: Disabled or Enabled When enabled, the Resume Time and Resume Date parameters appear - Acer 721TX | Service Guide - Page 61
Exit When you select the Exit menu or press Esc from any screen, the Exit options screen displays. The table describes the parameters in this screen. Parameter Exit Discarding Changes Exit Saving Changes Load Setup Defaults Discard Changes Save Changes Description Discards any changes made, exits - Acer 721TX | Service Guide - Page 62
54 System Utilities - Acer 721TX | Service Guide - Page 63
on how to disassemble the notebook computer for maintenance and troubleshooting. To disassemble the computer, you need the following tools: list below. For a more detailed disassembly procedure, please refer to the Service CD kit. The screws for the different components vary in size. During the - Acer 721TX | Service Guide - Page 64
56 TravelM ate 720 D isassem bly Flow chart (13.3 LC D ) A x 1 A x 1 Modem Cover DIM M Cover Modem M odule DIM M M odule SCREW LIST A: M2 x 4L (B/ZN) (Nylok) E: M2 x 4L (NI) F: M 2.5 x - Acer 721TX | Service Guide - Page 65
External Module Replacement Reassembling the Modem Board 1. Connect the modem cable to the system board. 2. Insert the modem board back into its socket. 3. Put on the modem board cover. 4. Secure the modem board cover with its original screw. Installing Memory 1. Insert the DIMM module into its - Acer 721TX | Service Guide - Page 66
3. Secure the DIMM cover with its original screw. Disassembling the CD-ROM Drive 1. Push the CD-ROM drive locker forward and carefully pull out the CD-ROM module. 2. To disassemble the CD-ROM module, remove the 2 screws from both sides of the CD- - Acer 721TX | Service Guide - Page 67
to remove the screw of the hard disk drive. 2. Carefully, pull out the hard disk drive to remove it. Disassembling the Hard Disk Drive 1. To disassemble the hard disk drive, remove the 2 screws on both sides of the hard disk drive. 2. Separate the hard disk drive from its bezel. Chapter 3 59 - Acer 721TX | Service Guide - Page 68
from it's shield plate. 4. Disconnect the hard disk cable from the hard disk drive. 5. To reconnect the hard disk cable, be sure that the 1st pin is aligned up as indicated. Removing and Replacing the Battery Pack 1. To remove the battery pack, press - Acer 721TX | Service Guide - Page 69
2. Pull out the battery pack. 3. Reinsert the battery pack by sliding it back in. 4. Slide the battery compartment cover into its place. Chapter 3 61 - Acer 721TX | Service Guide - Page 70
Removing the Keyboard 1. Slide out the hinge covers on both sides of the notebook. 2. To remove the middle cover, use a flatbladed screwdriver to release the latches as shown. 3. Lift the middle cover away . 62 Removal and Replacement - Acer 721TX | Service Guide - Page 71
4. Lift the keyboard up and outward to expose the keyboard connector at CN20. . 5. Remove the keyboard by carefully releasing the connector. 6. In reassembling the keyboard, be sure that the latches are lined up as indicated blew. Chapter 3 63 - Acer 721TX | Service Guide - Page 72
7. To replace the middle cover, be sure that the latches are lined up with the upper case as indicated below. 8. Press the middle cover to lock it in place. 64 Removal and Replacement - Acer 721TX | Service Guide - Page 73
Removing the LCD 1. Disconnect the internal microphone cable at CN4 from the system board. 2. Remove the LED cable at CN8 from the system board. 3. Remove the two screws of the LCD FPC cable at CN2 from the LVDS board. Chapter 3 65 - Acer 721TX | Service Guide - Page 74
4. Remove the LCD FPC cable cover from the system board. 5. Disconnect the LCD FPC cable from the LVDS board. 6. Use two flatbladed screwdrivers to remove the LVDS board at CN13 from the system board. 66 Removal and Replacement - Acer 721TX | Service Guide - Page 75
7. Remove the two screws at the base and at the back of the lower case. . 8. Carefully, detach the LCD module from the main unit. Chapter 3 67 - Acer 721TX | Service Guide - Page 76
Removing the CPU 1. To remove the CPU board, first remove the five screws of the CPU heat sink. 2. Lift the heat sink away. 3. Use this special tool placing it under the CPU board and aligning it with the white line, then lift up the CPU board to bring it out from the system board. 4. To reinsert - Acer 721TX | Service Guide - Page 77
5. Reinsert the CPU board at CN17 of the system board by aligning the CPU board with the two pillars of the MMO shield as shown below. 6. Use this special tool to press down and completely connect the CPU board to its socket. Chapter 3 69 - Acer 721TX | Service Guide - Page 78
Disassembling the Upper Case 1. To detach the upper case, first remove the two screws from the upper heat sink then lift the upper heat sink up and out. 2. Remove the floppy cable at CN18 from the system board. 3. Remove the mouse cable at CN19 from the system board. 70 Removal and Replacement - Acer 721TX | Service Guide - Page 79
4. Remove the 11 screws from the upper case and the base of the unit. 5. Disconnect the suspend cable at CN9, the left channel speaker at CN10 and the right channel speaker at CN11. 6. Remove the upper case from the lower case. 7. To reinsert the upper case into the lower case, be sure that the - Acer 721TX | Service Guide - Page 80
Removing the Speakers 1. Remove the two screws of the right channel speaker, then lift it away. 2. To remove the right channel speaker from the upper case, release its cable from the latches. 3. Remove the two screws from the left channel speaker, then lift it away. 72 Removal and Replacement - Acer 721TX | Service Guide - Page 81
Removing the Touchpad Bracket 1. Remove the four screws of the touchpad bracket. 2. Detach the bracket from the side latches. 3. Detach the touchpad cable from the touchpad board. 4. Remove the touchpad board from the upper case. Chapter 3 73 - Acer 721TX | Service Guide - Page 82
the Lower Case Removing the Floppy Disk Drive 1. Remove the three screws of the floppy disk drive. 2. Lift the floppy disk drive from the lower case. . 3. Remove the two screws from the floppy frame. 4. Separate the floppy disk drive from its frame. . 5. Carefully, disconnect the floppy - Acer 721TX | Service Guide - Page 83
Disassembling the Fan 1. Disconnect the fan cable from the system board. 2. Remove the four screws of the MMO shield. 3. Lift the MMO shield away from the lower case. 4. Remove the two screws of the fan. 5. Separate the fan from the MMO shield. Chapter 3 75 - Acer 721TX | Service Guide - Page 84
Removing the System Board 1. Remove the FIR lens from the lower case. 2. Disconnect the DC-DC charger between the two pins at CN22 and CN23 from the system board. 3. Remove the system board away from the lower case. 76 Removal and Replacement - Acer 721TX | Service Guide - Page 85
Removing the IDE Board 1. Remove the IDE board at CN30 from the system board. Removing the PCMCIA Card 1. Remove the four screws of the PCMCIA card. 2. Remove the PCMCIA card at CN16 from the system board. 3. This completes the disassembly procedure of the lower case. Chapter 3 77 - Acer 721TX | Service Guide - Page 86
Disassembling the LCD 1. Remove the two cushions and three mylar stickers from the LCD bezel. 2. Remove the five screws on the LCD bezel. 3. Carefully, pull out the display bezel. . 78 Removal and Replacement - Acer 721TX | Service Guide - Page 87
4. Remove the two screws of the LED board. 5. Pull out the LED board from the LCD. 6. Disconnect the LED board cable from the LED board. 7. Remove the internal microphone from the LCD. 8. Remove the six screws from the inverter board. 9. Lift the LCD and inverter board from the LCD panel. Chapter 3 - Acer 721TX | Service Guide - Page 88
10. Remove the inverter board by disconnecting the LCD FPC cable. 11. Remove the LCD power cable. . 12. Peel the tape off. 13. Disconnect the LCD FPC cable from the LCD. 80 Removal and Replacement - Acer 721TX | Service Guide - Page 89
Chapter 4 Troubleshooting TravelMate 720 has system checkouts, a list of error codes and messages with corresponding actions, and procedures for undetermined problems to help with troubleshooting. Note: The diagnostic tests are intended to test only Acer products. NonAcer products, prototype cards, - Acer 721TX | Service Guide - Page 90
detected an error and displayed an FRU code. Other symptoms (such as LCD display problems). Symptoms cannot be re-created (intermittent problems). Go To "Power System Checkout". "Symptom-to-FRU Index", and then use the customer-reported symptoms and go to "Symptom-to-FRU Index". 82 Troubleshooting - Acer 721TX | Service Guide - Page 91
in the test items. 4. Follow the instructions in the message window. If an error occurs with the internal diskette drive, reseat the connector on the System board. If the error still remains: 1. Reseat the diskette drive. 2. Replace the diskette driver cable. 3. Replace the diskette. 4. Replace the - Acer 721TX | Service Guide - Page 92
6 External keyboard (with keyboard/mouse cable) If any of these devices do not work, reseat the cable connector and repeat the failing operation. If the problem does not recur, recheck the connector. If the problem is not corrected, replace the device and then the System board. 84 Troubleshooting - Acer 721TX | Service Guide - Page 93
refer to "Running PQA Diagnostics Program"). 2. Go to the diagnostic Memory in the test items. 3. Press F2 in the test items. 4. Follow the instructions in the message window. Note: Make sure that the DIMM is fully installed into the connector. A loose connection can cause an error. Chapter 4 85 - Acer 721TX | Service Guide - Page 94
System Checkout To verify the symptom of the problem, power on the computer using each of the following power sources: 1. Remove the battery pack and diskette drive. 2. Connect the AC Adapter and check that power is supplied. 3. Disconnect the AC Adapter and install the charged battery pack; then - Acer 721TX | Service Guide - Page 95
Checking Operational Charging: To check operational charging, use a discharged battery pack or a battery pack that has less than 50% of the total power remaining when installed in the computer. Perform operational charging. If the battery status indicator does not turn on, remove the battery pack - Acer 721TX | Service Guide - Page 96
TouchPad pointer. This symptom is not a hardware problem. No service actions are necessary if the pointer movement stops in a short period instructions in the message window. If either the pointing stick or the click button do not work, do the following actions one at a time to correct the problem - Acer 721TX | Service Guide - Page 97
columns. If a FRU replacement did not solve the problem, put the original part back in the computer. Do determine the next possible FRU to be replaced when servicing a computer. Numeric error codes show the errors Hard disk driver. 2. "Load Setup Defaults" in BIOS Setup Utility. 3. Hard disk driver - Acer 721TX | Service Guide - Page 98
Defaults" in BIOS Setup Utility. 2. DIMM 3. System board 1. Check that the drive is defined with the proper diskette type in Setup. 2. Go to "Diskette Drive Checkout". 1. Check that the drive is defined with the proper diskette type in Setup. 2. Go to "Diskette Drive Checkout". 90 Troubleshooting - Acer 721TX | Service Guide - Page 99
3. System board 1. DIMM 2. BIOS ROM 3. System board None 1. BIOS ROM 2. System board 1. Run "Load Setup Defaults" in BIOS Setup Utility. 2. Backup battery (RTC) 3. System board 1. Enter Setup and see if fixed disk and drive A: are properly identified. 2. Diskette Driver 3. Hard Disk 4. System board - Acer 721TX | Service Guide - Page 100
inverter ID 2. LCD inverter 3. LCD FPC Cable 4. LCD 5. System board 1. Reseat the keyboard cable. 2. Keyboard 3. System board 1. Reseat TouchPad cable. 2. TouchPad board 3. System board 92 Troubleshooting - Acer 721TX | Service Guide - Page 101
Keyboard 3. System board 1. Battery 2. AC Adapter 3. DC/DC & Charge board 4. System board 1. Battery 2. AC adapter 3. DC/DC & Charge boar 4. System 1. Enter BIOS Utility to execute load setup default settings, then reboot system. 2. Reseat CD-ROM/DVD module. 1. Hard Disk/CD-ROM/DVD drive connector - Acer 721TX | Service Guide - Page 102
. Print problems Serial or parallel port device problems FRU / Action in Sequence 1. Speaker 2. System board System board System board 1. Run printer self-test. 2. Printer driver 3. Printer cable 4. System board 1. Device driver 2. Device cable 3. Device 4. System board 94 Troubleshooting - Acer 721TX | Service Guide - Page 103
defect, such as: cosmic radiation, electrostatic discharge, or software errors. FRU replacement should be considered only when a recurring problem exists. When analyzing an intermittent problem, do the following: 1. Run the advanced diagnostic test for the System board in loop mode at least 10 times - Acer 721TX | Service Guide - Page 104
devices: a. Non-Acer devices b. Devices attached to the port replicator c. Printer, mouse, and other external devices d. Battery pack e. Hard disk drive f. DIMM g. CD-ROM h. Diskette drive i. PC Cards 4. Power on the computer. 5. Determine if the problem has changed. 6. If the problem does not recur - Acer 721TX | Service Guide - Page 105
the inverter which stores its supported LCD type ID code. If you replace an LCD with one of a different brand or use a new inverter, the ID information in the inverter EEPROM should be updated. Follow the steps below to see the LCD Panel ID: 1. Follow the instructions on-screen to read current - Acer 721TX | Service Guide - Page 106
menu: PQA Vx_x xx-xx-xx Diag Result SysInfo Option Exit Diag MANUAL TEST AUTO TEST This screen allows you to specify the number of tests to perform. The options are as follows: Manual Test performs a single test and manually checks the selected test items in sequence. 98 Troubleshooting - Acer 721TX | Service Guide - Page 107
Auto Test performs multiple tests of the selected items and automatically checks the selected test items in sequence. Note: PCMCIA Diagnostic Supports the Manual test only. Do not select PCMCIA Diagnostic in Auto Test. Chapter 4 99 - Acer 721TX | Service Guide - Page 108
PQA Vx_x xx-xx-xx Diag Result SysInfo Option Exit Diag MANUAL TEST AUTO TEST TEST COUNT VALUE (1...9999) 1 Specify the SytTeEmSBToard [ ] Memory [ ] Keyboard [ ] Video [ ] Parallel Port [ ] Serial Port [ ] Diskette Drive [ ] Hard Disk [ ] CD-ROM [ ] Coprocessor [ 100 Troubleshooting - Acer 721TX | Service Guide - Page 109
port or System board error System board 7XXX Diskette drive error 1. Diskette drive 2. System board 8XXX 9XXX 10XXX 11XXX Hard disk error CD-ROM error CPU or System board error Pointing device error 1. Reload BIOS default setting. 2. Hard disk 3. System board 1. Reseat CD-ROM cable. 2. CD-ROM - Acer 721TX | Service Guide - Page 110
102 Troubleshooting - Acer 721TX | Service Guide - Page 111
CN18 CN19 CN20 CN24 LED Connector Left Speaker Connector Right Speaker Connector FDD Coneector Touchpad Connector Keyboard Connector Fan Connector SW1 BIOS Acer OEM Keyboard English US English Japanese European ON 1 2 3 4 ON 1 2 3 4 ON 1 2 3 4 ON 1 2 3 4 ON 1 2 3 4 ON 1 2 3 4 Chapter 5 103 - Acer 721TX | Service Guide - Page 112
Bottom View &1 &1 CN27 & CN29 DIMM Module Connector &1 &1 CN28 CN30 Modem Module Connector IDE Board Connector 104 Jumper and Connector Information - Acer 721TX | Service Guide - Page 113
the FRU (Field Replaceable Unit) listing in global configurations of TravelMate 720. Refer to this chapter whenever ordering for parts to repair , it will not be noted on the printed Service Guide. For ACER AUTHORIZED SERVICE PROVIDERS, your Acer office may have DIFFERENT part number codes to those - Acer 721TX | Service Guide - Page 114
Picture No. 18 Part name CD-ROM BRACKET Description ASSY CD ROM CHASSIS 700 Part No. 60.47A02.001 Processor DIMM FDD 44 CPU P II- IC CPU MOBI 01.I0MP2.U0B 300 MHZ PII-300 W/AGP IMM CPU P II333MHZ IC CPU MPII333 DIXON MMC2 256 01.I0MP2.X3A CPU P II333MHZ IC CPU MPII333 DIXON MMC1 256 - Acer 721TX | Service Guide - Page 115
Picture No. 14 Part name FDD FPC CABLE Description C.A FPC FDD 720 Part No. C.A FPC FDD 720 HDD NS HDD HDD MODULE 6M.42C01.001 MODULE 6GB IBM 6GB HDD MODULE 4GB HDD MODULE 4GB IBM 6M.47A03.021 20 HDD 6GB HDD 2.5 56.02A04.002 6480MB IBM/ DADA26480 HDD 4GB HDD 4090MB IBM/DTCA - Acer 721TX | Service Guide - Page 116
Picture Keyboard No. Part name Description Part No. 37 KEY NSK-84A41 BOARD US 91.78S07.041 13.3" LCD NS LCD ASSY LCD 6M.47A05.021 MOUDLE MODULE 13.3" 13.3" TFT 10 LCD INVERTER 19.21030.191 INVERTER T62.087.C 700 13.3" TFT NS LED C.A 15P 2C CABLE 100MM LED 13.3" TFT - Acer 721TX | Service Guide - Page 117
(HIT13.3"T 13.3" TFT FT) 700 1 LCD ASSY LCD 60.47A09.003 BAZEL BEZEL(13.3") 13.3" TFT 700 14.1" LCD NS LCD ASSY LCD HINGE HINGE SUPPORT SUPPORT PACK PACK 700 6M.47A04.021 NS LCD ASSY HINGE 6M.47A04.011 HINGE 13.3"TFT(710T PACK 13.3" E) NS LCD ASSY LCD 6M.42C02 - Acer 721TX | Service Guide - Page 118
PANEL 14.1" 720 14.1" TFT L LCD ASSY LCD PNL 60.42C10.002 PANEL 14.1" 720 14.1" TFT B LCD ASSY LCD 60.42C12.011 BAZEL BAZEL (ACER) 14.1" TFT 14.1" 720 B LCD ASSY LCD 60.42C12.012 BAZEL BAZEL - Acer 721TX | Service Guide - Page 119
Picture No. NS Part name LCD HINGE PACK 14.1" Description ASSY HINGE PACK 14.1 EXT 720 Part No. 6M.42C03.001 SYSTEM BOARD 23 MAIN BOARD 720 MAIN BOARD 55.42C01.001 NS NS MECHANICAL PARTS 15 PCMCIA SOCKET SKT CARDBUS IC10S-136PLPEJL 22.10172.051 FDD BRACKET BRACKET FDD SECC T-0.8 33. - Acer 721TX | Service Guide - Page 120
Picture No. 34 Part name HINGE COVER (R) Description CAP HINGE (R) PC Part No. 42.47A14.001 35 HINGE CAP HINGE 42.47A15.001 COVER (L) CAP (L) PC 36 MIDDLE ASSY MIDDLE 60.47A22.001 COVER CVR 700 WITHOUT NAME PLATE 29 BATTERY COVER 42.47A17.002 DOOR BATTERY PC 27 SIR COVER - Acer 721TX | Service Guide - Page 121
Picture NS No. 39 39 Part name UPPER CASE UPPER CASE Description ASSY U CASE 720 ASSY U CASE 720 Part No. 60.42C06.001 60.42C06.002 NS COVER SWITCH W.A CVR SW/ 2P 45MM AN700 50.47A10.001 NS SPEAKER SPK 1W 3520- 6M.47A09.001 MODULE 7CC W/CABLE 700DX NS NS POWER W.A CVR SW/ 50.47A10 - Acer 721TX | Service Guide - Page 122
MODEM BOARD MODEM 56K AMBIT/ J07.017.C.00 MODEM PCI CIS/BM5614BMDG BT2 54.09011.211 54.09232.011 NS ADAPTER ADT 90-264V 25.10064.021 60W ADP- 60HB V.A2 NS ADAPTER ADT 90-270V 25.10064.031 ADP-60JB V.A 720 28 BATTERY ASSY BTY PACK PACK LIP848NLA 60.47A01.001 - Acer 721TX | Service Guide - Page 123
FAN FAN FAN 30*30*10 U12QFB3E65 FAN 30*30*10 UDPFFMH01H BT2 23.10033.001 23.10033.031 7 MICROPH MICROPHONE 6M.47A08.001 ONE ACER 700DX MODULE NS SPEAKER SPK 1WV3520- 6M.47A09.001 MODULE 7CC W/CABLE 700DX NS RTC BTY LI 3V BATTERY CR1220 36MAH 23.20004.091 NS - Acer 721TX | Service Guide - Page 124
Picture NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS 116 No. 55 56 49 57 NS 58 NS J 50 61 47 52, K 48 54 NS 53 Part name SCREW SCREW SCREW SCREW SCREW SCREW SCREW SCREW SCREW SCREW SCREW SCREW SCREW SCREW SCREW SCREW Description SCREW M2.5*L15 BLW ZN SCREW M2.5*18L (B/ ZN) 700 SCREW MACH PAN - Acer 721TX | Service Guide - Page 125
EJKNOB SWP 300 LATCH LCD 700 MYLAR FOR HINGE PC 390 CSN SCRW SILICON 050 6*3H 800 PLT NAME (721TX)PC 31.7*5.6 720 PLATE NAME(LOGO) PC AN390 PLT NAME (720TE ACER) PC 720 FOOT PU BLACK 350P SPRING PCMCIA DOOR SWP 700 KNOB POWER PC DOOR PCMCIA ABS 050 370 SPRING - Acer 721TX | Service Guide - Page 126
Picture NS No. NS RECOVERY CD NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS Part name PCMCIA DOOR LOWER Description DOOR(L) PCMCIA ABS 050 AN370 Part No. 42.46919.001 W98 English-ST W98 German W98 Italian W98 Sp/ Por W98 French W98 - Acer 721TX | Service Guide - Page 127
Picture NS NS NS NS NS NS NS NS NS NS NS NS No. NS NS NS NS NS NS NS NS NS NS NS NS Part name W98 Traditional ChineseH.K W98 Russian W98 Turkish W98 Thai NT4 EnglishSTD NT4 German NT4 Italian NT4 French NT4 Spanish NT4 Traditional Chinese W95 German W95 Italian Description Recovery CD W98 (TC-HK) - Acer 721TX | Service Guide - Page 128
120 FRU (Field Replaceable Unit) List - Acer 721TX | Service Guide - Page 129
Appendix A Model Definition and Configuration TravelMate 720 Model Number Define Model Number LCD Type 720TX 721TX 721TXV 722TX 722TXV 14.1" TFT 14.1" TFT 14.1" TFT 14.1" TFT 14.1" TFT CPU Memory HDD PII-300/ AGP PII-333/ AGP PII-333/ AGP - Acer 721TX | Service Guide - Page 130
122 Model Definition and Configuration - Acer 721TX | Service Guide - Page 131
Appendix B Test Compatible Components List TravelMate720 compatibility is tested and verified by Acer's internal testing department. The PCMCIA functions are tested under Windows®95 (4.00.950C), Windows®98 and Windows®NT 4.0 environments. In addition to these tests, Long - Acer 721TX | Service Guide - Page 132
PCMCIA PCMCIA, PM Test Cards Memory cards LAN cards Win95 Pass Pass Modem cards Combo cards ZV cards Pass Pass Pass Capture cards SCSI cards Pass Pass Cardbus cards Pass PCMCIA, Integration/Application Test Item Two R2 cards Two CardBus cards R2 & ZV cards CardBus & ZV cards R2 & CardBus - Acer 721TX | Service Guide - Page 133
4MB Epson 5MB Flash Epson 1MB Flash 3COM/Megaherts 10/100 LAN CardBus Xircom CardBus Ethernet 10/100 Panasonic 8x CD-ROM Xircom CreditCard Ethernet Adapter IIps 3COM Etherlink III LAN1 IBM Ethernet II 3COM Fast Etherlink 16-bit PC Card Xircom CreditCard Ethernet +Modem 33.6 3COM Etherlink III LAN+33 - Acer 721TX | Service Guide - Page 134
Long Run Item Long Run 4 hr Win95 Pass Win98 Pass WinNT4.0 Pass Year2000 Compliance Test RTC test Item Description Pass Result Pass 126 Test Compatible Components List - Acer 721TX | Service Guide - Page 135
's website offers you convenient and valuable support resources whenever you need them. You can find information on all of Acer's Notebook, Desktop and Server models including; 6 Service guides for all models 6 User's manuals 6 Training materials 6 BIOS updates 6 Software utilities Also contained on - Acer 721TX | Service Guide - Page 136
128 Online Support Information - Acer 721TX | Service Guide - Page 137
Index 16550 UART 19 A AC Adapter 25 ACPI 30 ACPI. See Advanced Configuration and Power lock 5 on indicator 4 CardBus PC Card 1 CCFT 24 CD-ROM Drive Disassembly 58 Charger 23 Checkout Auxiliary Input Device 84 Diskette Drive 83 Keyboard 84 Memory 85 Power System 86 TouchPad 88 computer features 1 - Acer 721TX | Service Guide - Page 138
39 simultaneous 2 switching device in Note- book Manager 39 Display Device 39 Driver Test CD-ROM 83 DSVD 21 Dual Display 2 E EEPROM 97 Extended 18 External Module Replacement 57 Disassembling the CD-ROM Drive 58 Disassembling the Hard Disk Drive 59 Installing Memory 57 Reassembling the Modem Board - Acer 721TX | Service Guide - Page 139
59 Hard disk drives 21 Hibernation mode 29 conditions 29 entering 29 hot key 8 resuming from 29 utility 32 Hot Keys 8 I I/O Ports 10 I/O ports bottom ports 13 rear ports 10 right ports 12 indicator lights 4 Indicators 4 Information Viewer 34 infrared turning on and off 47 Intermittent Problems 95 - Acer 721TX | Service Guide - Page 140
89 numeric keypad embedded 6 O On-die L2 cache 1 Online Support Information 127 Operational Chargin 87 P Parallel Port 18 Parallel port 10 parallel 38 power management 27 ACPI 30 advanced 30 Power Management Modes 27 Hard Disk Standby Mode 27 Hibernation mode 29 Peripheral Standby Modes 28 Sleep - Acer 721TX | Service Guide - Page 141
Exit menu 53 Hard Disk 0 submenu indicator 4 status indicators 4 Stereo 20 Supervisor Password 36 S-video output 1 Symptom-to-FRU Index 89 System Specification 1 System Troubleshooting 81 U Undetermined Problems 96 Universal Serial Bus (USB) 1 Upper Case Disassembly 70 User Password 37 utility BIOS - Acer 721TX | Service Guide - Page 142
134 Index