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Preface Notebook Computer M540/M545N/M550/M555N 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.
Preface About this Manual 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 M540/ M545N/M550/M555N series notebook PC.
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...
Introduction Chapter 1: Introduction Overview This manual covers the information you need to service or upgrade the M540/M545N/M550/M555N 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. Operating systems (e.g.
LCD type, and the location of the card reader (the easiest way to differentiate be- tween the model types is the location of the card reader). Feature M540N/M545N M550N/M555N 15.0" XGA (1024 * 768) TFT LCD Type 14.0"...
7. TouchPad and Buttons 8. LED Power & Communication Indicators 9. Built-In Microphone 10. Speakers Note: Only M540N Design Style is Pictured Note: Only M550N Design Style is Pictured 1 - 6 External Locator - Top View with LCD Panel Open...
External Locator - Front & Right Side Views Figure 2 Front Views 1. LED Power & Communication Indicators 2. LCD Latch (M550N Only) M550N 3. 4-in-1 Card Reader (M540N Only) M540N Figure 3 Right Side Views 1. Headphone-Out Jack 2. Microphone-In Jack 3. USB 2.0 Port 4.
Bottom View M550N 1. Vent/Fan Intake 2. Battery Cover Module Bay 4. Hard Disk Cover 5. Speakers (M550N Only) M540N Overheating To prevent your com- puter from overheating make sure nothing blocks the vent/fan in- takes while the com- puter is in use.
Introduction M550N Mainboard Overview - Top (Connectors) Figure 9 Mainboard Top Connectors 1. USB Port 2. S/PDIF-Out Jack 3. Line-In Jack 4. Mini-IEEE 1394 Port 1 - 12 M550N Mainboard Overview - Top (Connectors)
Introduction M540N Mainboard Overview - Top (Connectors) Figure 13 Mainboard Top Connectors 1. USB Port 2. S/PDIF-Out Jack 3. Line-In Jack 4. Mini-IEEE 1394 Port 1 - 16 M540N Mainboard Overview - Top (Connectors)
Disassembly Chapter 2: Disassembly Overview This chapter provides step-by-step instructions for disassembling the M540/M545N/M550/M555N 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. Procedures such as upgrading/replacing the RAM, CD device and hard disk are included in the User’s Manual but are repeated here for your convenience.
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 Optical Device: 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 Battery Removal 3. Slide the latch in the direction of the arrow, and hold it in place. 4.
1. Turn off the computer, and remove the battery (page 2 - screws. 2. Locate the hard disk bay cover and remove screw M550N, OR screws M540N. M540N M550N HDD System Warning New HDD’s are blank. Before you begin make sure: 1. HDD Bay Cover You have backed up any data you want to keep from your old HDD.
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Disassembly For M550N computers: Figure 3 3. Slide the hard disk and cover assembly in the direction of arrow HDD & Case Assembly 4. Lift the hard disk and cover assembly up in the direction of arrow Removal 5. Remove the hard disk and cover assembly Figure c a.
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Disassembly For M540N computers: Figure 4 HDD & Case Assembly 7. Pull the tab to slide the hard disk and case assembly in the direction of arrow Removal 8. Lift the hard disk and case assembly out of the bay in the direction of arrow 9.
Even the clean- est hands have oils which can attract parti- cles, and degrade the module’s perfor- M540N mance. M550N 1. Module Bay Cover • 7 Screws (M550N) • 5 Screws (M540N) M540N M550N Removing the System Memory (RAM) 2 - 9...
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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 6 arrows (Figure Memory Removal 5. The RAM module(s) will pop-up Figure d , and you can then remove it Sequence c.
Disassembly Removing the Processor Figure 7 Processor Removal 1. Turn off the computer, and remove the battery (page 2 - 5) and the module bay cover (page 2 - 2. Remove screws (Figure a) from the heat sink in the order indicated a.
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Disassembly 4. Turn the release latch towards the unlock symbol , to release the CPU (Figure 8c). 5. Carefully (it may be hot) lift the CPU up out of the socket (Figure 8d). 6. Reverse the process to install a new CPU. 7.
Disassembly Removing the Wireless LAN Module Figure 9 Wireless LAN 1. Turn off the computer, remove the battery (page 2 - 5) and the module bay cover (page 2 - Module Removal 2. Carefully disconnect cable , then remove the screws from the module socket.
Disassembly Removing the Bluetooth Module Figure 10 Bluetooth Removal 1. Turn off the computer, remove the battery (page 2 - 5), remove the module bay cover (page 2 - 9) and remove the WLAN module (page 2 - 13). a. Remove WLAN Module 2.
Push the optical device 4. Restart the computer to allow it to automatically detect the new device. out off the computer at point 1. M540N M550N 2 Optical Device Removing the Optical (CD/DVD) Device 2 - 15...
Re-Inserting the Key- board Keyboard Tabs When re-inserting the keyboard firstly align the five keyboard tabs at the bottom of the keyboard with the slots in the case. M540N M550N 6. Keyboard 2 - 16 Removing the Keyboard...
Disassembly Removing the Modem For M550N computers: Figure 13 1. Turn off the computer, remove the battery (page 2 - 5), remove the hard disk (page 2 - 6), remove the heat sink Modem Removal for (page 2 - 11), remove the optical device (page 2 - 15) and remove the keyboard (page 2 -...
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Disassembly For M540N computers: Figure 14 1. Turn off the computer, remove the battery (page 2 - 5), remove the hard disk (page 2 - 6) and remove the optical Modem Removal for device (page 2 - 15). M540N 2. Remove screws from the bottom case and carefully disconnect the fan cable from the main board.
Part Lists Appendix A:Part Lists This appendix breaks down the M540/M545N/M550/M555N/M540N series notebook’s construction into a series of il- lustrations. 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.
Schematic Diagrams Appendix B:Schematic Diagrams This appendix has circuit diagrams of the M540/M545N/M550/M555N notebook’s PCB’s. The following table indicates where to find the appropriate schematic diagram. Table B - 1 Diagram - Page Diagram - Page Diagram - Page Schematic System Block Diagram - Page B - 2 ICH7-M 4/4 - Page B - 16 +VCORE - Page B - 30...
Schematic Diagrams Calistoga 5/5 +2.5VS +2.5 VS _TXL VD S +2.5VS +1.5V S_PCI E +1.0 5V S L3 5 HC B1608 KF -1 21T25 H C B160 8KF -121T25 12/14 R2.0A +1. 5V S C 2 71 C 272 C 28 0 C5 72 C 5 67 C 568...
Schematic Diagrams ICH7-M 1/4, SATA 12/13 R2.0A C 713 *32.768KH z CM130327681220 12/16 R2.0A R 443 Layout Note: +VD D5 Co-layout U33A LP C_AD [3:0] [ 14,21,40] R553 750_1% R 554 560 D 20 S CS 751V R TC_X1 A B1 A A6 LPC _AD 0 R TXC 1...
Schematic Diagrams ICH7-M 2/4, PCI, USB U 33 D F2 6 [22 ] PCIE_R XN 1_W LAN D MI _RXN0 [5 ] PERn 1 DMI0R XN ICH7 Boot BIOS select F2 5 [22 ] PCIE_R XP1_W LAN D MI _RXP0 [5] PERp 1 DMI0R XP PC IE_ TXN1_C...
Schematic Diagrams ICH7-M 3/4, FWH U33 C R 174 2.2 K_0 4 ICH _SMBCL K ICH _SMBCLK C 22 AF19 Z 1404 R1 90 10K _04 [9,10,17, 18,22] I CH_SMB CLK SMBCL K ( +3VS ) GP IO21 /SATA0G P R 180 2.2 K_0 4 ICH _SMBDA T...
Schematic Diagrams ICH7-M 4/4 +5VS +5 VS +5VS +5VS +5VS +5VS +5 VS +5VS +5VS +5VS +5VS +5VS +3 V U3 3E VSS[1] VSS[ 98] VSS[2] VSS[ 99] C 417 C 661 C37 3 C2 10 C 61 C2 70 C 414 C 408 C407...
Schematic Diagrams CD-ROM, PC-BEEP, USB2.0*2 ID E_PDD [15:0] [12] I DE_PD D[15:0] CD-ROM USB 2.0 JC D [24] C D_L CD _R [24] [24] CD _G C D_RESET# IDE_PDD8 I DE_PD D7 IDE_PDD9 I DE_PD D6 IDE_PDD10 I DE_PD D5 IDE_PDD11 +5VS I DE_PD D4...
Schematic Diagrams LAN RTL8110SBL LAN _V DD 25 LAN _VD D 33 LAN _V D D33 H CB3216K F-800T30 C 643 C 651 C 654 C 626 C669 C653 2S B1188 0. 1u_04 0.1u_04 0.1u_04 0.1u_04 10u_08 0. 1u_04 C587 C639 C 625 VCTRL25...
A_C CBE3# [ 20] S D_CLK [20] C CBE3 #/ RE G# PC LK _PCM [17 ] PCLK_PC M PC IC LK * 47_04 M540N CP AR /A13 A_C PAR [20] RN 39 * 8P4RX0_04 [1 3,18] PCI_PAR Z 1958...
R 529 * 100K_04 0.1u_04 100K_04 W EB0 ALIEN _O N R 530 * 10K_04 W EB1# HIGH M540N W EB2# +5VH 8 J HKB [27] PWR SW R N52 8P4R X10K_04 Z 2114 +VI N +3VS [2, 5,8,9,10,11,12,13,14,15,16,17,18, 19, 20, 22,24,26,27,29,30]...
Schematic Diagrams ISA BIOS, MINI CARD, NEW CARD ISA BIOS FOR MINI CARD IT8510TE/GX-L SA [19:0] [21 ] SA [19: 0] SD [7:0 ] [21] S D[7: 0] ONLY TSOP 48pin 3V S A0 +3VH8 DQ 15/A -1 V CC S A1 EON EN29LV800BT-70TCP S A2...
Schematic Diagrams AZALIA CODEC AL880 +3VS +5VS_AU D +5 VS L 43 HC B1608KF -121T2 5 HC B2 012KF- 500 T40 C 15 5 Z 240 1 6 80p SU RR B-R Z 243 4 C 749 C747 C 734 C 714 C 750 C 711...
Schematic Diagrams SYSTEM POWER SCS 355V +VI N1 Layout Note: +3 VH 8 A O3409 SCS 355V +VIN A If U21 is adjustable(G916T1UF). So 165K_1% will be +V IN 150mA installed. And C496 will be changed to 100K_1%. R 16 1 0.01u R 168 330 K...
Schematic Diagrams +VCORE Q4 9 +VIN C 22 RQA13 0N 03 R QA130 N03 <VALUE > SC S55 1V R 41 <VAL UE> C 47 C2 0 C 44 C 446 C4 31 +VD D5 +VI N JO PEN1 <V AL UE> <VALU E>...
852 04-0 2R MGND L2 : Trace Length Max=0.2" MGN D M+V IN M+3 VS M+V IN MC 84 MTV _DAC A_OUT M540N SPEAKER FOR M540N *0.1 u M+3V S MTV _DAC B_OUT CONNECTOR MTV _DAC C_ OUT MGND MR 59...
Schematic Diagrams HOT KEY BD(HOTKEY, LED) FOR M540G P S +5VS P S+5 VS PS +5VS PS +5VS POWER NUM LOCK CAPS LOCK SCROLL SWITCH LOCK PSR 4 P SR 1 P SR 3 P SR 2 LED8 4 70 LED4 LED5 4 70...
Schematic Diagrams EXT.COM PORT EGN D EGND EJC OM1 E+5V S E LP1 Value = ( CL-12 ) * 2 EC 2 *F CA 3216KF4-121T03 EDTRO# Z 4108 Z 410 7 CL = 20 pF EC 1 *16p *1 6p ETXD O Z 4110 Z 410 8...