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Preface Notebook Computer M540J/M545J/M550J/M555J Service Manual...
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Preface Notice The company reserves the right to revise this publication or to change its contents without notice. Information contained herein is for reference only and does not constitute a commitment on the part of the manufacturer or any subsequent ven- dor.
This manual is intended for service personnel who have completed sufficient training to undertake the maintenance and inspection of personal computers. It is organized to allow you to look up basic information for servicing and/or upgrading components of the M540J/ M545J/M550J/M555J series notebook PC.
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Preface IMPORTANT SAFETY INSTRUCTIONS Follow basic safety precautions, including those listed below, to reduce the risk of fire, electric shock and injury to per- sons when using any electrical equipment: 1. Do not use this product near water, for example near a bath tub, wash bowl, kitchen sink or laundry tub, in a wet basement or near a swimming pool.
Preface Instructions for Care and Operation The notebook computer is quite rugged, but it can be damaged. To prevent this, follow these suggestions: Don’t drop it, or expose it to shock. If the computer falls, the case and the components could be damaged. Do not expose the computer Do not place it on an unstable Do not place anything heavy...
Preface Avoid interference. Keep the computer away from high capacity transformers, electric motors, and other strong mag- netic fields. These can hinder proper performance and damage your data. Take care when using peripheral devices. Use only approved brands of Unplug the power cord before peripherals.
Preface Battery Precautions • Only use batteries designed for this computer. The wrong battery type may explode, leak or damage the computer. • Do not continue to use a battery that has been dropped, or that appears damaged (e.g. bent or twisted) in any way. Even if the computer continues to work with a damaged battery in place, it may cause circuit damage, which may possibly result in fire.
Preface Related Documents You may also need to consult the following manual for additional information: User’s Manual on CD This describes the notebook PC’s features and the procedures for operating the computer and its ROM-based setup pro- gram. It also describes the installation and operation of the utility programs provided with the notebook PC. VIII...
Chapter 1: Introduction Overview This manual covers the information you need to service or upgrade the M540J/M545J/M550J/M555J series notebook computer. Information about operating the computer (e.g. getting started, and the Setup utility) is in the User’s Manual. Information about drivers (e.g. VGA & audio) is also found in User’s Manual. That manual is shipped with the computer.
3. LED Status Indicators 4. Speakers 5. LED Power & Communication Indicators 6. Power Button 7. Keyboard 8. Built-In Microphone 9. TouchPad and Buttons 10. AP-Key Buttons M550J M540J External Locator - Top View with LCD Panel Open 1 - 5...
External Locator - Front & Right side Views Figure 2 Front Views 1. LED Power & Communication Indicators 2. LCD Latch (M550J Only) M550J 3. 4-in-1 Card Reader (M540J Only) M540J Figure 3 Right Side Views 1. Headphone-Out Jack 2. Microphone-In Jack 3. USB 2.0 Port 4.
1. Vent/Fan Intake 2. Battery 3. Memory (RAM)/ WLAN Module/ CPU Cover 4. Hard Disk Cover 5. Speakers (M550J Only) M540J Overheating To prevent your com- puter from overheating make sure nothing blocks the vent/fan in- takes while the com- puter is in use.
Chapter 2: Disassembly Overview This chapter provides step-by-step instructions for disassembling the M540J/M545J/M550J/M555J series notebook’s parts and subsystems. When it comes to reassembly, reverse the procedures (unless otherwise indicated). We suggest you completely review any procedure before you take the computer apart.
Disassembly NOTE: All disassembly procedures assume that the system is turned OFF, and disconnected from any power supply (the battery is removed too). Maintenance Tools The following tools are recommended when working on the notebook PC: • M3 Philips-head screwdriver •...
Disassembly Maintenance Precautions The following precautions are a reminder. To avoid personal injury or damage to the computer while performing a re- moval and/or replacement job, take the following precautions: Power Safety Warning 1. Don't drop it. Perform your repairs and/or upgrades on a stable surface. If the computer falls, the case and other Before you undertake components could be damaged.
Disassembly Disassembly Steps The following table lists the disassembly steps, and on which page to find the related information. PLEASE PERFORM THE DISASSEMBLY STEPS IN THE ORDER INDICATED. To remove the Battery: To remove the Wireless LAN Module: 1. Remove the battery page 2 - 5 1.
Disassembly Removing the Battery 1. Turn the computer off, and turn it over. Figure 1 2. Locate the battery bay at point (Figure 1a). Battery Removal 3. Slide the latch in the direction of the arrow, and hold it in place. 4.
You have all the CD-ROMs and FDDs required to install your operating system and programs. • 1 Screw (M550J) • 2 Screws (M540J) If you have access to the internet, download the latest application and hardware driver updates for the operating system you plan to install.
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,and reverse the process to install any new hard disk. 7. HDD Case (M550J) 16. HDD Case (M540J) 17. HDD • 4 Screws (M550J) • 2 Screws (M540J) Removing the Hard Disk Drive 2 - 7...
Even the clean- est hands have oils which can attract parti- cles, and degrade the module’s perfor- M540J mance. M550J 1. Bay Cover • 7 Screws (M550J) • 5 Screws (M540J) 2 - 8 Removing the System Memory (RAM)
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Disassembly 4. Gently pull the two release latches ( & on the sides of the memory socket in the direction indicated by the Figure 5 arrows (Figure 5a). Memory Removal Sequence a. Pull release latch(es). b. Remove the module(s). 5. The RAM module(s) will pop-up Figure 5b , and you can then remove it...
9. 6. Restart the computer to allow it to automatically detect the new device. M540J M550J 1. Bay Cover 10. Optical Device • 7 Screws (M550J) • 5 Screws (M540J) 2 - 10 Removing the Optical (CD/DVD) Device...
7c) off the computer. the computer. c. Remove the screws in the order indicated. d. Remove the heat sink. M550J 1. Bay Cover M540J 14. Heat Sink • 12 Screws (M550J) • 10 Screws (M540J) Removing the Processor 2 - 11...
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Disassembly 6. Turn the release latch towards the unlock symbol , to release the CPU (Figure 8a). 7. Carefully (it may be hot) lift the CPU up out of the socket (Figure 8b). 8. Reverse the process to install a new CPU. 9.
Remove the keyboard. Re-Inserting the Key- board When re-inserting the keyboard firstly align the five keyboard tabs at the bottom of the keyboard with the slots in the case. 4. Keyboard M540J M550J Removing the Keyboard 2 - 13...
Disassembly Removing the Wireless LAN Module Figure 10 Wireless LAN 1. Turn off the computer, remove the battery (page 2 - 5) and the bay cover Module Removal 2. Carefully disconnect cable , then gently pull the two release latches ( ) on the sides of the module socket.
Disassembly Removing the Modem and Bluetooth Modules Figure 11 For M550J computers: Modem and 1. Turn off the computer, remove the battery (page 2 - 5), the optical device (page 2 - 10), the hard disk drive (page Bluetooth Removal 6), bay cover (page 2 - 8) the CPU heat sink...
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Remove the screw and disconnect the cable. d. Disconnect the antenna cable from the Bluetooth module. e. Lift the Bluetooth module out. 4. Modem Module 8. Bluetooth Module • 3 Screws (M540J) 2 - 16 Removing the Modem and Bluetooth Modules...
Part Lists Appendix A:Part Lists This appendix breaks down the M540J/M545J/M550J/M555J series notebook’s construction into a series of illustra- tions. The component part numbers are indicated in the tables opposite the drawings. Note: This section indicates the manufacturer’s part numbers. Your organization may use a different system, so be sure to cross-check any relevant documentation.
A - 10 Top - (M545J) page A - 11 Bottom - (M540J/M545J) page A - 12 LCD - (M540J) page A - 13 LCD - (M545J) page A - 14 Combo Drive - (M540J) A - 2 Part List Illustration Location...
Part Lists Combo Drive (M540J) Figure A - 11 Combo Drive (M540J) 無鉛 無鉛 無鉛 A - 14 Combo Drive (M540J)
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Schematic Diagrams Appendix B:Schematic Diagrams This appendix has circuit diagrams of the M540J/M545J/M550J/M555J notebook’s PCB’s. The following table indi- cates where to find the appropriate schematic diagram. Table B - 1 Diagram - Page Diagram - Page Diagram - Page...
H EAD PH ONE -L CP 5 R406 1 2K_0 4_1 % 8P4CX1 80p FOR M550J C 719 R4 20 M540J R406 = 10K_1% 6 80p 1K _04_ 1% JI NTM IC_1 5 AMPG AMP G PC BEEP JI NTMIC_1...
Schematic Diagrams SYSYEM POWER, BRIDGE BATT +3VH8 AO3409 150mA Layout Note: +VIN +VINA If U21 is adjustable(G916T1UF). +3VS R116 So 165K_1% will be installed. R353 330K 10K_04 And C496 will be changed to 100K_1%. AM9433P INSTANT_SW [25] [25] PWR_SW# C889 R289 DDON L TO H +VDD5...