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Preface Notebook Computer N250GU / N252GU 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.
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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 N250GU / N252GU 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 N250GU / N252GU 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.
Introduction Specifications Processor Options Storage Intel® Pentium® Processor One Changeable 2.5" 7mm (h) SATA HDD/SSD Silver N5000 (1.10GHz) (Factory Option) One M.2 SATA Solid State Drive (SSD) 4MB Smart Cache, 14nm, DDR4-2400MHz, TDP 6W (Factory Option) eMMC 32GB/64GB/128GB Intel® Celeron® Processor Latest Specification Information Pointing Device N4100 (1.10GHz), N4000 (1.10GHz)
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Introduction Interface Environmental Spec Two USB 2.0 Ports Temperature ° ° One USB 3.0 (USB 3.1 Gen 1) Port Operating: 5 C - 35 One USB 3.0 (USB 3.1 Gen 1) Type-C Port* Non-Operating: -20°C - 60°C *The maximum amount of current supplied by USB Type-C Relative Humidity ports is 500mA (USB 2.0)/900mA (USB 3.1).
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 N250GU / N252GU 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 removal and/or replacement job, take the following precautions: Power Safety Don't drop it. Perform your repairs and/or upgrades on a stable surface. If the computer falls, the case and other components Warning 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 4G Module Figure 8 4G Module Removal 4G 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 N250GU / N252GU 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 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 N250GU / N252GU notebook’s PCB’s. The following table indicates where to find the appropriate schematic diagram. Diagram - Page Diagram - Page Diagram - Page Table B - 1...
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Schematic Diagrams System Block Diagram 7 IN 1 6-7P-N24G7-003 N240GU/N250GU Gemini Lake System Block Diagram 5V,5VS,3.3V,3.3VS MAIN BOARD 3.3VA,1.8VS 6-71-N24G0-D02 SHEET 1~26 SHEET 26 USB BOARD 6-71-N24P3-D02 SHEET 33 VDD3,VDD5 SHEET 27 MULTI BOARD CRT CONN 2400MHz DDR4/1.2V CARD READER CON,RJ45 CONN 0.6VS,1.24VA,1.2V...
Schematic Diagrams USB Port / TPM Modify Value,9/21 Max USB 3.0 port (CHARGER) Modify Value,9/22 Max VDD5 USBVCC_CH Smart CDP 80 mil pin8 pin4 Function D01 to D02 VOUT For W/ or W/O standby VDD5 C169 DCP autodetect with change parts stuff C133 mouse/keyboard wake up VDD5...
3.3V 8887H HSPI level 1.8V, PIN106 1.8V 3IN1 VDD3 VDD3 EC ROM(EC ROM for BIOS+ME+EC) power VDD3 N250GU 80CLK 8987 PIN 106 VDD3( EC ROM for EC), C256 C257 C297 C276 C287 Modify,7/10 Max SPI ROM POWER EC ROM(EC ROM for BIOS+ME+EC) power VDD3 10u_6.3V_X5R_06...
Schematic Diagrams 1.05VS, 1.8VA Del,7/20 Max Sheet 31 of 40 the *CV-40mil short is CV test ues. PJ42 *CV-test VDD3 1.05VS, 1.8VA PJ43 VDD5 VDD5 *OPEN-2mm 3.3VA Default short PC107 PC106 PC108 R335 1.8VA 10u_6.3V_X5R_06 0.1u_10V_X7R_04 1u_6.3V_X5R_04 Note: Close to PIN4 47K_04 G9661-25ADJF11U V1.8...
Schematic Diagrams LED Board LED BOARD L_LED_ACIN L_LED_BAT_FULL 38 L_LED_PWR L_LED_BAT_CHG LRN1 220_8P4R_04 RY-SP155HYYG4-1 RY-SP155HYYG4-1 Sheet 38 of 40 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 220_04 220_04...
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.