Page 4
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.
Page 5
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 N250PU / N251PU / N252PU series notebook PC.
Page 6
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.
Page 7
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...
Page 8
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.
Page 9
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.
Page 10
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 N250PU / N251PU / N252PU 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® Pentium® Processor One Changeable 2.5" 7mm (h) SATA HDD/SSD N4200 (1.10GHz) (Factory Option) One M.2 SATA Solid State Drive (SSD) 2MB Smart Cache, 14nm, DDR3L-1866MHz, TDP 6W (Factory Option) 32GB eMMC* Intel® Celeron® Processor Latest Specification Information *Note: Systems with 32GB eMMC modules only support N3450 (1.10GHz), N3350 (1.10GHz)
Page 15
Introduction Interface Full Range AC/DC Adapter AC Input: 100 - 240V, 50 - 60Hz Two USB 2.0 Ports DC Output: 19V, 2.1A (40W) One USB 3.0 (USB 3.1 Gen 1) Port Removable 4 Cell Smart Lithium-Ion Battery Pack, 32WH One USB 3.0 (USB 3.1 Gen 1) Type C Port (Factory Option) Removable 4 Cell Smart Lithium-Ion Bat- One HDMI-Out Port tery Pack, 44WH...
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 Indicators 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 N250PU / N251PU / N252PU 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.
Page 31
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 DDR3L Up to 1867 MHz. The main memory can be expanded up to 8GB. The total memory size is automatically de- tected by the POST routine once you turn on your computer.
Page 33
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.
Page 35
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, Combo, & 3G Module Cables Note that the cables for connecting to the antennae on WLAN, WLAN & Bluetooth Combo, and 3G modules are not labelled. The cables/covers (each cable will have either a black or transparent cable cover) are color coded for identifi- cation 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.
Page 40
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.
Page 42
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 N250PU / N251PU / N252PU 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 A - 2...
Schematic Diagrams Appendix B: Schematic Diagrams This appendix has circuit diagrams of the N250PU / N251PU / N252PU notebook’s PCB’s. The following table indi- cates where to find the appropriate schematic diagram. Diagram - Page Diagram - Page Diagram - Page...
Page 52
Schematic Diagrams Processor 2/8 Note: There is no need to have a RCOMP for DDI0. U25C APL_SOC Please ensure that the eDP_RCOMP pin is populated with the correct value. The SoC will use the eDP_RCOMP value for DDI Port0 as well. MCSI_DP_0 MCSI_DN_0 MCSI_DP_1...
Schematic Diagrams Processor 5/8 When the platform does not use the USB2_OTG_ID and USB2_VBUS_SNS pins, U25F APL_SOC USB2_OTG_ID pin should be unconnected on the platform (terminated with internal USB2.0 pull ups] and USB2_VBUS_SNS should be USB_OTG_ID USB3.0 AC15 connected to ground. USB_OTG_ID M/B USB port0(2.0+3.0) USB3_TX0_P...
Schematic Diagrams Audio Codec AUDIO CODEC ALC269-CV2 For 1.8V HDA Link. 1.5V OR 3.3V BY PLATFORM R213 0_04 PVDD1_2 1.8VS HCB1005KF-121T20 D E S I G N , Layout note: D01 to D02 GND and AUDG space is DVDD_IO 0511 del C372 C380 60mils ~ 100mils...
Schematic Diagrams USB, TPM USB PORT Charge USB 3.0 port (CHARGER) C339 22u_6.3V_X5R_08 Smart CDP C117 22u_6.3V_X5R_08 80 MIL pin8 pin4 Function C350 *220u_6.3V_6.3*6.3*4.2 USBVCC_CH 0511 CHG value 6-11-22711-AB7 DCP autodetect with mouse/keyboard wake up CLOSE TO CONNECTOR J_USB3_1 DT1140-04LP-7 S0 Charging with SDP USB3_TX1P USB3_TX1PJ...
HSPI leve V, PIN1 1 . 8 V 3IN1 VDD3 VDD3 EC ROM(EC ROM for BIOS+ME+EC) power VDD3 8987 PIN 106 VDD3( EC ROM for EC), E C N250PU R180 10K_04 80CLK C179 C240 C202 C180 C235 SPI ROM POWER...
Schematic Diagrams LAN (RTL8411B) Crystal HSX32 1 S(3. 2X 2. 5X 0. 6 5) INTE L PLAYFOR M SUPP ER R TC WA KE O N Switching Regulator close to PIN48 meet realtek Freq tolerance 50ppm L A N ( S 5 ) D e d e o A D 6 MSD_CMD/MS_D2 MSD_CMD/MS_D2_R...
Schematic Diagrams LED Board LED BOARD L_LED_BAT_FULL L_LED_ACIN L_LED_BAT_CHG L_LED_PWR LRN1 220_8P4R_04 RY-SP155HYYG4-1 RY-SP155HYYG4-1 Sheet 35 of 39 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 L_LED_BAT_CHG...
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.