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Preface Notebook Computer W251ESQ/W255ES 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 W251ESQ/ W255ES 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/DVD 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. System Startup 1.
Chapter 1: Introduction Overview This manual covers the information you need to service or upgrade the W251ESQ/W255ES series notebook computer. Information about operating the computer (e.g. getting started, and the Setup utility) is in the User’s Manual. Information about dri-vers (e.g. VGA & audio) is also found in the User’s Manual. The manual is shipped with the computer.
Introduction External Locator - Top View with LCD Panel Open Figure 1 Top View 1. PC Camera (Optional) 2. LCD 3. Power Button 4. LED Status Indicators 5. Keyboard 6. Built-In Microphone *Note that the microphone location is dependent upon your model design 7.
Introduction External Locator - Front & Right Side Views Figure 2 Front View 1. LED Power Indicator FRONT VIEW Figure 3 Right Side View 1. Microphone-In RIGHT SIDE VIEW Jack 2. Headphone-Out Jack 3. USB 2.0 Port 4. Optical Device Drive Bay 5.
Introduction External Locator - Left Side & Rear View Figure 4 Left Side View 1. DC-In Jack 2. External Monitor Port LEFT SIDE VIEW 3. RJ-45 LAN Jack 4. HDMI-Out Port 5. USB 3.0 Ports 6. Vent 7. Multi-in-1 Card Reader 8.
Introduction External Locator - Bottom View Figure 6 Bottom View 1. Battery 2. Component Bay Cover 3. Vent 4. Hard Disk Bay Cover 5. Speakers Overheating To prevent your com- puter from overhea- ting, make sure no- thing blocks any vent while the computer is in use.
Chapter 2: Disassembly Overview This chapter provides step-by-step instructions for disassembling the W251ESQ/W255ES 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 Keyboard: 1. Remove the battery page 2 - 5 1.
Disassembly Removing the Battery Figure 1 Battery Removal 1. Turn the computer off, and turn it over. 2. Slide the latch in the direction of the arrow (Figure 1a a. Slide the latch and hold it 3. Slide the latch in the direction of the arrow, and hold it in place (Figure 1a in place.
Disassembly Removing the Hard Disk Drive The hard disk drive can be taken out to accommodate other 2.5" serial (SATA) hard disk drives with a height of 9.5mm Figure 2 (h). Follow your operating system’s installation instructions, and install all necessary drivers and utilities (as outlined in HDD Assembly Chapter 4 of the User’s Manual) when setting up a new hard disk.
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Disassembly 3. Remove the hard disk bay cover (Figure 3b Figure 3 4. Grip the tab and slide the hard disk in the direction of arrow (Figure 3c HDD Assembly 5. Lift the hard disk assembly out of the bay (Figure 3d Removal (cont’d.) 6.
Disassembly Removing the Optical (CD/DVD) Device Figure 4 Optical Device 1. Turn off the computer, remove the battery (page 2 - Removal 2. Locate the component bay cover and remove screws (Figure 4a 3. Carefully (a fan and cable are attached to the under side of the cover) lift up the bay cover. a.
Disassembly Removing the System Memory (RAM) Figure 5 RAM Module The computer has two memory sockets for 204 pin Small Outline Dual In-line Memory Modules (SO-DIMM) supporting Removal DDRIII (DDR3) Up to 1066/1333 MHz. The main memory can be expanded up to 8GB. The SO-DIMM modules sup- ported are 1024MB and 2048MB DDRIII Modules.
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Disassembly 6. Gently pull the two release latches ( & ) on the sides of the memory socket in the direction indicated by the Figure 6 arrows (Figure 6c). The RAM module will pop-up Figure 6d , and you can then remove it RAM Module 7.
Disassembly Removing and Installing a Processor Figure 7 Processor Removal Processor Removal Procedure 1. Turn off the computer, turn it over, and remove the battery (page 2 - 5) and the component bay cover (page 2 - a. The CPU heat sink will 2.
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Disassembly 5. Turn the release latch towards the unlock symbol to release the CPU (Figure 8d). Figure 8 6. Carefully (it may be hot) lift the CPU up and out of the socket (Figure 8e). Processor Removal 7. Reverse the process to install a new CPU. (cont’d) 8.
Disassembly Processor Installation Procedure Figure 9 1. Insert the CPU (Figure 9a), pay careful attention to the pin alignment, it will fit only one way (DO NOT FORCE Processor Installation IT!), and turn the release latch towards the lock symbol (Figure 9b).
Disassembly Removing the 3.75G Module Figure 10 3G Module Removal 1. Turn off the computer, turn it over, and remove the battery (page 2 - 5) and the component bay cover (page 2 - 2. The 3.75G module will be visible at point on the mainboard (Figure 10a).
Disassembly Removing the Wireless LAN Module Figure 11 Wireless LAN 1. Turn off the computer, turn it over, and remove the battery (page 2 - 5) and the component bay cover (page 2 - Module Removal 2. The Wireless LAN module will be visible at point on the mainboard (Figure 11a).
Disassembly Removing the Keyboard Figure 12 Keyboard Removal 1. Turn off the computer, and remove the battery (page 2 - 2. Remove screws from the bottom of the computer. Press at points to unsnap the LED cover module a. Remove screws from the bottom of the computer.
Appendix A:Part Lists This appendix breaks down the W251ESQ/W255ES series notebook’s construction into a series of illustrations. 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.
Part List Illustration Location The following table indicates where to find the appropriate part list illustration. Table A - 1 Part List Illustration Part W251ESQ W255ES Location page A - 3 page A - 4 page A - 5 Bottom...
Schematic Diagrams Appendix B: Schematic Diagrams This appendix has circuit diagrams of the W251ESQ/W255ES notebook’s PCB’s. The following table indicates where to find the appropriate schematic diagram. Diagram - Page Diagram - Page Diagram - Page Table B - 1...
Schematic Diagrams CCD, TPM, MULTI CON FOR POWER SW BOARD FOR OPTIMUS FUNCTION CPU FAN CONTROL FON# 3.3VS 3.3V 5VS_FAN VOUT C326 VSET J_SW1 1u_10V_Y 5V_06 AX995SA 04->06 C100824 20mil CPU_FAN 34 MBTN *10mil_short_04 AX995B(SOT23-6) & APE8872 6-02-03940-B20 M_BTN# WEB_WWW# C350 6-02-00995-B20 Co-Layout...
Schematic Diagrams W270HU POWER SW BOARD POWER SW & LED POWER SWITCH W_3.3VS W _3.3VS W_3.3V LID SWITCH IC W C1 *BAV99 RECTIF IER W _3.3V 0.1u_16V_Y 5V_04 W R2 WR 3 100K_04 220_04 220_04 220_04 220_04 WMGND WLID_SW# 20mil 20mil 20mil 20mil...
Download the BIOS computer model. 1. Go to www.clevo.com.tw and point to E-Services and click E-Channel. Note that BIOS versions 2. Use your user ID and password to access the appropriate download area (BIOS), and download the latest BIOS files...
BIOS Update Use the flash tools to update the BIOS 1. Make sure you are not loading any memory management programs such as HIMEM by holding the F8 key as you see the message “Starting MS-DOS”. You will then be prompted to give “Y” or “N” responses to the programs being loaded by DOS.