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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.
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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 N250WU / N251WU / N252WU 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.
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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...
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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.
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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.
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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 °...
Chapter 1: Introduction Overview This manual covers the information you need to service or upgrade the N250WU / N251WU / N252WU series notebook computer. Information about operating the computer (e.g. getting started, and the Setup utility) is in the User’s Manual.
Introduction Specifications Processor Options Storage Intel® Core™ i7 Processor One Changeable 2.5" 7mm (h) SATA HDD/SSD i7-7500U (2.70GHz) (Factory Option) One M.2 SATA/PCIe Gen3 x4 Solid State 4MB Smart Cache, 14nm, DDR4-2133MHz, TDP 15W Drive (SSD) Intel® Core™ i5 Processor Latest Specification Information Pointing Device i5-7200U (2.50GHz)
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Introduction Interface Card Reader Two USB 2.0 Ports Embedded Multi-In-1 Card Reader One USB 3.0 (USB 3.1 Gen 1) Port MMC (MultiMedia Card) / RS MMC One USB 3.0 (USB 3.1 Gen 1) Type-C Port* SD (Secure Digital) / Mini SD / SDHC/ SDXC Power (Factory Option) One USB 3.1 Gen 2 Type-C Port* *The maximum amount of current supplied by USB Type-C...
Introduction External Locator - Top View with LCD Panel Open Figure 1 Top View 1. PC Camera 2. *PC Camera LED *When the PC camera is in use, the LED will be illuminated in red. 3. Built-In Microphone (W950LU only) 4.
Introduction External Locator - Front & Right Side Views Figure 2 Front View 1. LED Indicator FRONT VIEW Figure 3 Right Side View 1. USB 2.0 Port RIGHT SIDE VIEW 2. Multi-in-1 Card Reader 3. External Monitor Port 4. RJ-45 LAN Jack External Locator - Front &...
Introduction External Locator - Left Side & Rear View Figure 4 Left Side View 1. Security Lock Slot 2. DC-In Jack 3. HDMI-Out Port LEFT SIDE VIEW 4. Vent 5. USB 3.0/3.1 Port 6. USB 3.0/3.1 Type C Port 7. Microphone-In Jack 8.
Introduction Mainboard Overview - Top (Connectors) Figure 9 Mainboard Top Connectors 1. DC-In Jack 2. HDMI-Out Port 3. USB Port 3.0/3.1 Port 4. USB Port 3.0/3.1 Type C Port 5. Microphone-In Jack 6. Headphone-Out Jack 7. SIM Card Reader 8. Keyboard Cable Connector 1 - 10 Mainboard Overview - Top (Connectors)
Chapter 2: Disassembly Overview This chapter provides step-by-step instructions for disassembling the N250WU / N251WU / N252WU 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 M.2 SSD: 1. Remove the battery page 2 - 5 1.
Disassembly Removing the Battery Figure 1 Battery Removal 1. Turn off the computer, 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 1b in place.
Disassembly Removing the Hard Disk Drive Figure 2 HDD Assembly The hard disk drive can be taken out to accommodate other 2.5" serial (SATA) hard disk drives with a height of 7.0mm Removal (h). Follow your operating system’s installation instructions, and install all necessary drivers and utilities (as outlined in Chapter 4 of the User’s Manual) when setting up a new hard disk.
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Disassembly 5. Remove the screw from the hard disk assembly (Figure 3d Figure 3 6. Slightly lift and pull the hard disk assembly in the direction of arrow (Figure 3e HDD Assembly 7. Lift the hard disk assembly out of the bay (Figure 3f Removal (cont’d.) 8.
Disassembly Removing the System Memory (RAM) Figure 4 RAM Module The computer has two memory sockets for 260 pin Small Outline Dual In-line Memory Modules (SO-DIMM) supporting Removal DDR4 Up to 2133 MHz. The main memory can be expanded up to 32GB. The total memory size is automatically detect- ed by the POST routine once you turn on your computer.
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Disassembly 5. Pull the latches to release the second module if necessary. 6. Insert a new module holding it at about a 30° angle and fit the connectors firmly into the memory slot. 7. The module will only fit one way as defined by its pin alignment. Make sure the module is seated as far into the slot as it will go.
Disassembly Removing the Keyboard Figure 5 Keyboard Removal 1. Turn off the computer, turn it over to remove the battery (page 2 - 2. Remove screws from the bottom case (Figure 5a). a. Remove the screws. 3. Open it up with the LCD on a flat surface before pressing at point to release the keyboard module while releas- b.
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Disassembly 6. Connect the keyboard ribbon cable to the locking collar socket , and be careful not to bend the keyboard ribbon Figure 6 cable (Figure 6d). Keyboard Assembly 7. Insert the keyboard at point and then slide the keyboard in at point (Figure 6e).
Disassembly Removing the Wireless LAN Module Figure 7 WLAN Module 1. Turn off the computer, turn it over to remove the battery (page 2 - 5) and bottom cover (page 2 - Removal 2. The Wireless LAN module will be visible at point on the mainboard (Figure 7a).
Disassembly Wireless LAN and Combo Module Cables Note that the cables for connecting to the antennae on WLAN and WLAN & Bluetooth Combo modules are not labelled. The cables/covers (each cable will have either a black or transparent cable cover) are color coded for identification as outlined in the table below.
Disassembly Removing the 3G Module Figure 8 3G Module Removal 3G Module Removal Procedure 1. Turn off the computer, turn it over to remove the battery (page 2 - 5) and bottom cover (page 2 - a. Locate the module. 2.
Disassembly Removing and Installing the M.2 SSD Module Figure 9 M.2 SSD Module m.2 SSD Removal Procedure Removal 1. Turn off the computer, turn it over to remove the battery (page 2 - 5) and bottom cover (page 2 - 2.
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Disassembly M.2 SSD Installation Procedure Figure 10 M.2 SSD Module 1. Place the thermal pad on the bottom case as shown (Figure 10a). Installation 2. Insert the module in the computer Figure 10b 3. Tighten the screw to secure it in place (Figure 10c).
Disassembly Removing the CCD Figure 11 CCD Removal 1. Turn off the computer, turn it over to remove the battery (page 2 - 2. Run your fingers around the inner frame of the LCD panel at the points as indicated by the arrows (Figure a.
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Disassembly 5. Disconnect the cable Figure 12 6. Remove the CCD module (Figure 12f). CCD Removal 7. Reverse the process to install a new CCD module. (cont’d) d. Disconnect the cable. e. Remove the CCD mod- ule. 7. CCD Module 2 - 18 Removing the CCD...
Appendix A:Part Lists This appendix breaks down the N250WU / N251WU / N252WU 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.
Part List Illustration Location The following table indicates where to find the appropriate part list illustration. Table A - 1 Part List Illustration Part Location page A - 3 Bottom page A - 4 page A - 5 page A - 6 page A - 7 A - 2...
Schematic Diagrams Appendix B: Schematic Diagrams This appendix has circuit diagrams of the N250WU / N251WU / N252WU notebook’s PCB’s. The following table in- dicates where to find the appropriate schematic diagram. Diagram - Page Diagram - Page Diagram - Page...
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Schematic Diagrams System Block Diagram 7 IN 1 6-7P-N24W7-002 KABY LAKE U System Block Diagram 3V,5V,3VS,5VS,1.8VS MAIN BOARD SHEET 1~34 6-71-N24W0-D02 DEFAULT 14" SHEET 27 USB BOARD 6-71-N2403-D04 1866/ 2133 MHz SHEET 35 DDR4 DDR4 MULTI BOARD VDD3,VDD5 RTD2136N SO-DIMM A SHEET 28 CRT CONN SYSTEM SMBUS...
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Schematic Diagrams Processor 8/11 PROCESSOR CORE POWER VCCIN SVID Signals VCCIN VCCIN U19L 1.0VT CPU POWER 1 OF 4 R332 56_1%_04 H_CPU_SVIDALRT# C148 C142 C122 VCCCORE_1 VCCCORE_33 R333 100_1%_04 H_CPU_SVIDDAT_R VCCCORE_2 VCCCORE_34 back 1u 20pcs VCCCORE_3 VCCCORE_35 CAD Note: the PU resistors close to CPU VCCCORE_4 VCCCORE_36 back 10u 7pcs...
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Schematic Diagrams Processor 9/11 1.0VA 0.696 A *30mil_short_06 1.0VA_1P0 C133 C101 C102 1u_6.3V_X5R_04 U19O D02 6/8 CPU POWER 4 OF 4 2.574 A AB19 1.0VA VCCPRIM_1P0_1 0.020 A C100 1u_6.3V_X5R_04 AB20 AK15 3.3VA_GPP *30mil_short_06 VCCPRIM_1P0_2 VCCPGPPA 3.3VA 22u_6.3V_X5R_06 AG15 0.004 A VCCPRIM_1P0_3 VCCPGPPB 0.006 A...
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Schematic Diagrams Processor 10/11 VCCGT VCCGT U19M VCCGT 31 A C104 CPU POWER 2 OF 4 31 A VCCGT_1 VCCGT_45 back 1u 7pcs VCCGT_2 VCCGT_46 VCCGT_3 VCCGT_47 AA63 back 10u 5pcs VCCGT_4 VCCGT_48 AA64 VCCGT_5 VCCGT_49 AA66 VCCGT_6 VCCGT_50 AA67 VCCGT_7 VCCGT_51 AA69...
Schematic Diagrams Panel PANEL CONNECTOR (For coaxial cable) PANEL POWER PLVDD ANDY 0303 for PLVDD 3.3VS >100 mil >100 mil J_LCD1 VOUT 4/12 3.3VS C299 C289 C486 C291 R256 C290 ANDY 0303 for 1u_6.3V_X5R_04 1u_6.3V_X5R_04 22u_6.3V_X5R_06 *10u_6.3V_X5R_06 100K_04 1u_6.3V_X5R_04 UP7553PMA5-25 Cap NEAR PIN4,5 [18] LVDS-U0N...
Schematic Diagrams USB Port, TPM USB PORT Charge USB 3.0 port (CHARGER) C405 22u_6.3V_X5R_08 USB3.0 Max Trace length C406 22u_6.3V_X5R_08 Follow Design Guide 80 MIL C408 *220u_6.3V_6.3*6.3*4.2 USBVCC_CH Smart CDP 6-11-22711-AB7 pin8 pin4 Function CLOSE TO CONNECTOR J_USB3_1 TVUDF1004AD0 DCP autodetect with VBUS C411 0.1u_10V_X7R_04...
Schematic Diagrams Power SW Board S_VDD3 POWER SW & LED POWER SWITCH 100K_04 SJ_SW1 N25_SW S_VDD3 YB8251ST23 SMGND 20mil S_3.3VS FOR 15" SMGND SMGND SM_BTN# SMGND YB8251ST23: 6-02-08251-LC0 SLID_SW# AH9249NTR-G1: 6-02-09249-LC0 SMGND ANDY 0306 FOR FP225H-008S11M YB8251ST23 SLID_SW# NORMAL Sheet 38 of 41 FOR 14"...
Schematic Diagrams LED Board LED BOARD [40] L_LED_ACIN L_LED_BAT_FULL [40] [40] L_LED_PWR L_LED_BAT_CHG [40] LRN1 220_8P4R_04 Sheet 40 of 41 RY-SP155HYYG4-1 RY-SP155HYYG4-1 LED Board LGND LGND LGND LGND POWER ON LED/ AC IN FULL LED/ BAT CHARGE L3.3VS D01 to D02 L3.3VS LJ_LED1 LGND...
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 “EFI Shell”. You will then be prompted to give “Y” or “N” responses to the programs being loaded by EFI Shell.