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Preface Notebook Computer N855HC 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 N855HC se- ries 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 1.
Preface Contents Introduction ..........1-1 Top ....................A-3 Bottom ................... A-4 Overview ..................1-1 Main Board ................... A-5 Specifications ..................1-2 HDD ....................A-6 External Locator - Top View with LCD Panel Open ......1-4 LCD ....................A-7 External Locator - Front & Right Side Views .........1-5 Schematic Diagrams.........
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Preface PCH 4/9 ..................B-26 LED Board ..................B-58 PCH 5/9 ..................B-27 Power Sequence ................B-59 Updating the FLASH ROM BIOS..C-1 PCH 6/9 ..................B-28 PCH 7/9 ..................B-29 Download the BIOS ................C-1 PCH 8/9 ..................B-30 Unzip the downloaded files to a bootable CD/DVD or PCH 9/9 ..................
Chapter 1: Introduction Overview This manual covers the information you need to service or upgrade the N855HC 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 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. 3. Built-In Array Microphone 4. LCD 5. Power Button 6.
Introduction External Locator - Front & Right Side Views Figure 2 Front View 1. LED Indicator FRONT VIEW Figure 3 Right Side View 1. Headphone-Out RIGHT SIDE VIEW Jack 2. Microphone-In Jack 3. USB 2.0 Port 4. USB 3.0 (USB 3.1 Gen 1) Type A Port 5.
Introduction External Locator - Left Side & Rear View Figure 4 Left Side View 1. DC-In Jack 2. RJ-45 LAN Jack 3. External Display LEFT SIDE VIEW Port 4. HDMI-Out Port 5. USB 3.0 (USB 3.1 Gen 1) Type C Port (Factory Option) USB 3.1 Gen 2 Type C Port...
Introduction Mainboard Overview - Top (Connectors) Figure 9 Mainboard Top Connectors 1. DC-In Jack 2. RJ-45 LAN Jack 3. External Display Port 4. HDMI-Out Port 5. USB Port 3.0/3.1 (Type C) Connector 6. USB Port 3.0/3.1 (Type A) Connector 7. Multi-in-1 Card Reader 8.
Chapter 2: Disassembly Overview This chapter provides step-by-step instructions for disassembling the N855HC 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 3G Module: 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 in the 3. Slide the latch in the direction of the arrow. direction of the arrow.
Disassembly Removing the Keyboard Figure 2 Keyboard Removal 1. Turn off the computer, turn it over. 2. Remove screws from the bottom of the computer. a. Remove the screws from 3. Open it up with the LCD on a flat surface before pressing at point to release the keyboard module (use the spe- the bottom of the compu- cial eject stick...
Disassembly Removing the Hard Disk Drive Figure 3 The hard disk drive can be taken out to accommodate other 2.5" serial (SATA) hard disk drives with a height of 9.5mm HDD Assembly or 7mm (h). Follow your operating system’s installation instructions, and install all necessary drivers and utilities (as Removal outlined in Chapter 4 of the User’s Manual) when setting up a new hard disk.
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Disassembly screws from the HDD assembly (Figure 4b). Figure 4 6. Slightly lift and pull the hard disk assembly in the direction of arrow (Figure 4c HDD Assembly 7. Lift the hard disk assembly out of the bay (Figure 4d Removal (cont’d.) 8.
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 DDR3L up to 1600 MHz. The main memory can be expanded up to 16GB. The total memory size is automatically de- tected by the POST routine once you turn on your computer.
Disassembly Removing the M.2 SSD Module Figure 6 M.2 SSD Module M.2 SSD Module Removal Procedure Removal 1. Turn off the computer, turn it over, remove the battery (page 2 - 2. The M.2 SSD module will be visible at point on the mainboard (Figure 6a).
Disassembly Removing the Wireless LAN Module Figure 7 Wireless LAN 1. Turn off the computer, turn it over, remove the battery (page 2 - Module Removal 2. The Wireless LAN module will be visible at point on the mainboard (Figure 7a).
Disassembly Wireless LAN, Combo, 3G & LTE Module Cables Note that the cables for connecting to the antennae on WLAN, WLAN & Bluetooth Combo, 3G and LTE modules are not labelled. The cables/covers (each cable will have either a black or transparent cable cover) are color coded for iden- tification as outlined in the table below.
Disassembly Removing the 3G Module Figure 8 3G Module Removal Procedure 3G Module Removal 1. Turn off the computer, remove the battery (page 2 - a. Locate the module. 2. Locate the module, it is visible at point Figure 8a b.
Disassembly Removing the CPU Heat Sink Figure 9 Heat Sink Removal Heat Sink Removal Procedure 1. Turn off the computer, turn it over, remove the battery (page 2 - 5) and the bottom cover (page 2 - a. Remove the screws. &...
Disassembly Removing the CCD Figure 10 CCD Removal 1. Turn off the computer, turn it over to remove the battery (page 2 - 2. Lay the computer down on a flat surface with the top case up forming a 90 degree angle. Carefully remove the a.
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Disassembly 5. Disconnect the cable (Figure 11c). Figure 11 6. Remove the CCD module (Figure 11d). CCD Removal 7. Reverse the process to install a new CCD module. (cont’d) c. Disconnect the cable. d. Remove the CCD mod- ule. 11.
Appendix A:Part Lists This appendix breaks down the N855HC 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 Main Board page A - 6 page A - 7 A - 2...
Schematic Diagrams Appendix B: Schematic Diagrams This appendix has circuit diagrams of the N855HC 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 VGA Frame Buffer Interface Term Description U150C BGA_0908_P080_P085_P100_290X290 FBB_CMD[31:0] The total trace length measured COMMON FBB_CMD[31:0] 14,15 from GPU ball to capacitor is Under GPU 3/19 FBB Frame Buffer Interface no more than 150 mil The total trace length measured FBB_D[31:0] U150D from GPU ball to capacitor is no...
Schematic Diagrams VGA I/O U150K U150L U150M BGA_0908_P080_P085_P100_290X290 BGA_0908_P080_P085_P100_290X290 U150N BGA_0908_P080_P085_P100_290X290 COMMON COMMON BGA_0908_P080_P085_P100_290X290 COMMON 7/19 IFPC 8/19 IFPD COMMON 9/19 IFPEF 4/19 DACA ALL PINS NC FOR GF117 ALL PINS NC FOR GF117 ALL PINS NC FOR GF117 GF108/GKx N17P GB4C-128 N17P...
Schematic Diagrams PS8625 Sheet 18 of 58 PS8625 Gary_DEL PS8625 Title Title Title [18] PS8625(EDP TO LVDS) [18] PS8625(EDP TO LVDS) [18] PS8625(EDP TO LVDS) Size Size Size Document Document Document Number Number Number R e v R e v R e v 6-71-N8500-D02 6-71-N8500-D02...
Schematic Diagrams HDMI Differential pair mismatch < 5 mil R4.4 CPU to Level Shift total trace length < 5.5” ,via count 2 ,referenc e t o ground . Level Shift to HDMI connector total trace length < 1” ,via count 2 ,referenc e t o ground .
Schematic Diagrams LED, CCD, TPM, Power SW Con. NGFF B & M KEY TPM 2.0 (SLB9665TT) PCI E S S D L E D S A T A WLAN LED L E D WLAN ON PIN24 S S D L E D B I O S Windows 7 WLAN OFF...
Schematic Diagrams Power Switch Board *0_04 *0_04 6-71-N850S-D03 *0_04 *0_04 POWER SW BOARD *0_04 *0_04 Sheet 54 of 58 Power Switch Board BH_3.3VS BH_3.3VS POWER POWER POWER BUTTON BUTTON BOTTOM 6-53-31500-B41 820_06 820_06 For N850 BSW1 Gary_change for ME T4BJB10BQR 6-13-82001-2AB 6-13-82001-2AB BJ_SW1...
Schematic Diagrams LED Board *0_04 *0_04 6-71-N8704-D04 *0_04 *0_04 *0_04 *0_04 6-52-55001-021 GREEN YELLOW HDD LED WLAN LED L_LED_HDD# 220_04 L_3.3VS RY-SP190YG34-5M WLAN ON GREEN YELLOW Windows 7 L_AIRPLAN_LED# Airplane mode 220_04 WLAN OFF L_3.3VS RY-SP190YG34-5M Airplane ON 6-52-55001-021 Windows 8 Airplane OFF WLAN/BLUETOOTH GREEN/YELLOW...
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.