Clevo N855HC User manual

N855HC

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Notebook Computer
N855HC
Service Manual

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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. They assume no responsibility or liability for any errors or inaccuracies that may appear in this publication nor are
they in anyway responsible for any loss or damage resulting from the use (or misuse) of this publication.
This publication and any accompanying software may not, in whole or in part, be reproduced, translated, transmitted or
reduced to any machine readable form without prior consent from the vendor, manufacturer or creators of this publica-
tion, except for copies kept by the user for backup purposes.
Brand and product names mentioned in this publication may or may not be copyrights and/or registered trademarks of
their respective companies. They are mentioned for identification purposes only and are not intended as an endorsement
of that product or its manufacturer.
Version 1.0
February 2017
Trademarks
Intel and Intel Core are trademarks of Intel Corporation.
Windows®is a registered trademark of Microsoft Corporation.
Other brand and product names are trademarks and /or registered trademarks of their respective companies.

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About this Manual
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.
The following information is included:
Chapter 1, Introduction, provides general information about the location of system elements and their specifications.
Chapter 2, Disassembly, provides step-by-step instructions for disassembling parts and subsystems and how to upgrade
elements of the system.
Appendix A, Part Lists
Appendix B, Schematic Diagrams
Appendix C, Updating the FLASH ROM BIOS

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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.
2. Avoid using a telephone (other than a cordless type) during an electrical storm. There may be a remote risk of elec-
trical shock from lightning.
3. Do not use the telephone to report a gas leak in the vicinity of the leak.
4. Use only the power cord and batteries indicated in this manual. Do not dispose of batteries in a fire. They may
explode. Check with local codes for possible special disposal instructions.
5. This product is intended to be supplied by a Listed Power Unit as follows:
• AC Input of 100 - 240V, 50 - 60Hz, DC Output of 19.5V, 6.15A (120 Watts) minimum AC/DC Adapter.
FCC Statement
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
This device may not cause harmful interference.
This device must accept any interference received, including interference that may cause undesired operation.

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Instructions for Care and Operation
The notebook computer is quite rugged, but it can be damaged. To prevent this, follow these suggestions:
1. Don’t drop it, or expose it to shock. If the computer falls, the case and the components could be damaged.
2. Keep it dry, and don’t overheat it. Keep the computer and power supply away from any kind of heating element. This
is an electrical appliance. If water or any other liquid gets into it, the computer could be badly damaged.
3. Follow the proper working procedures for the computer. Shut the computer down properly and don’t forget to save
your work. Remember to periodically save your data as data may be lost if the battery is depleted.
Do not expose the computer
to any shock or vibration. Do not place it on an unstable surface. Do not place anything heavy on the computer.
Do not expose it to excessive
heat or direct sunlight. Do not leave it in a place where foreign matter or mois-
ture may affect the system.
Don’t use or store the com-
puter in a humid environment. Do not place the computer on any surface which will block
the vents.
Do not turn off the power
until you properly shut down
all programs.
Do not turn off any peripheral
devices when the computer is
on.
Do not disassemble the com-
puter by yourself. Perform routine maintenance on your computer.

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4. 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.
5. Take care when using peripheral devices.
Power Safety
The computer has specific power requirements:
• Only use a power adapter approved for use with this computer.
• Your AC adapter may be designed for international travel but it still requires a steady, uninterrupted power supply. If you are
unsure of your local power specifications, consult your service representative or local power company.
• The power adapter may have either a 2-prong or a 3-prong grounded plug. The third prong is an important safety feature; do
not defeat its purpose. If you do not have access to a compatible outlet, have a qualified electrician install one.
• When you want to unplug the power cord, be sure to disconnect it by the plug head, not by its wire.
• Make sure the socket and any extension cord(s) you use can support the total current load of all the connected devices.
• Before cleaning the computer, make sure it is disconnected from any external power supplies.
Use only approved brands of
peripherals. Unplug the power cord before attaching peripheral devices.
Do not plug in the power
cord if you are wet. Do not use the power cord if it is broken. Do not place heavy objects on the power cord.

Power Safety
Warning
Before you undertake
any upgrade proce-
dures, make sure that
you have turned off the
power, and discon-
nected all peripherals
and cables (including
telephone lines and
power cord). It is advis-
able to also remove
your battery in order to
prevent accidentally
turning the machine
on.

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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.
• Recharge the batteries using the notebook’s system. Incorrect recharging may make the battery explode.
• Do not try to repair a battery pack. Refer any battery pack repair or replacement to your service representative or qualified service
personnel.
• Keep children away from, and promptly dispose of a damaged battery. Always dispose of batteries carefully. Batteries may explode
or leak if exposed to fire, or improperly handled or discarded.
• Keep the battery away from metal appliances.
• Affix tape to the battery contacts before disposing of the battery.
• Do not touch the battery contacts with your hands or metal objects.
Battery Guidelines
The following can also apply to any backup batteries you may have.
• If you do not use the battery for an extended period, then remove the battery from the computer for storage.
• Before removing the battery for storage charge it to 60% - 70%.
• Check stored batteries at least every 3 months and charge them to 60% - 70%.

Battery Disposal
The product that you have purchased contains a rechargeable battery. The battery is recyclable. At the end of its useful life, under var-
ious state and local laws, it may be illegal to dispose of this battery into the municipal waste stream. Check with your local solid waste
officials for details in your area for recycling options or proper disposal.
Caution
Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer.
Discard used battery according to the manufacturer’s instructions.
Battery Level
Click the battery icon in the taskbar to see the current battery level and charge status. A battery that drops below a level of 10%
will not allow the computer to boot up. Make sure that any battery that drops below 10% is recharged within one week.

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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. Remove all packing materials.
2. Place the computer on a stable surface.
3. Insert the battery and make sure it is locked in position.
4. Securely attach any peripherals you want to use with the
computer (e.g. keyboard and mouse) to their ports.
5. Attach the AC/DC adapter to the DC-In jack at the rear of the
computer, then plug the AC power cord into an outlet, and
connect the AC power cord to the AC/DC adapter.
6. Use one hand to raise the
lid/LCD to a comfortable viewing angle
(do not exceed 135 degrees) ; use the other hand (as illustrated in
Figure 1) to support the base of the computer (Note: Never lift the
computer by the lid/LCD).
7. Press the power button to turn the computer “on”.
Figure 1
Opening the Lid/LCD/
Computer with AC/DC
Adapter Plugged-In

Shut Down
Note that you should always shut your computer down by
choosing the Shut down command in Windows (see be-
low). This will help prevent hard disk or system problems.
Click the icon in the Start Screen and
choose Shut down from the menu.
Or
Right-click the Start button at the bottom of the Start
Screen or the Desktop and choose Shut down or sign out
> Shut down from the context menu.
130°

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Contents
Introduction ..............................................1-1
Overview .........................................................................................1-1
Specifications ..................................................................................1-2
External Locator - Top View with LCD Panel Open ......................1-4
External Locator - Front & Right Side Views .................................1-5
External Locator - Left Side & Rear View .....................................1-6
External Locator - Bottom View .....................................................1-7
Mainboard Overview - Top (Key Parts) .........................................1-8
Mainboard Overview - Bottom (Key Parts) ....................................1-9
Mainboard Overview - Top (Connectors) .....................................1-10
Mainboard Overview - Bottom (Connectors) ...............................1-11
Disassembly ...............................................2-1
Overview .........................................................................................2-1
Maintenance Tools ..........................................................................2-2
Connections .....................................................................................2-2
Maintenance Precautions .................................................................2-3
Disassembly Steps ...........................................................................2-4
Removing the Battery ......................................................................2-5
Removing the Keyboard ..................................................................2-6
Removing the Hard Disk Drive .......................................................2-7
Removing the System Memory (RAM) ..........................................2-9
Removing the M.2 SSD Module ...................................................2-10
Removing the Wireless LAN Module ...........................................2-11
Wireless LAN, Combo, 3G & LTE Module Cables .....................2-12
Removing the 3G Module .............................................................2-13
Removing the CPU Heat Sink .......................................................2-14
Removing the CCD .......................................................................2-15
Part Lists ..................................................A-1
Part List Illustration Location ........................................................A-2
Top ................................................................................................. A-3
Bottom ........................................................................................... A-4
Main Board ................................................................................... A-5
HDD .............................................................................................. A-6
LCD ............................................................................................... A-7
Schematic Diagrams.................................B-1
System Block Diagram ...................................................................B-2
Processor 1/6 ...................................................................................B-3
Processor 2/6 ...................................................................................B-4
Processor 3/6 ...................................................................................B-5
Processor 4/6 ...................................................................................B-6
Processor 5/6 ...................................................................................B-7
Processor 6/6 ...................................................................................B-8
DDR4 CHA SO-DIMM ..................................................................B-9
DDR4 CHB SO-DIMM ................................................................B-10
VGA PCI-E Interface ....................................................................B-11
VGA Frame Buffer Interface ........................................................B-12
VGA Frame Buffer A ...................................................................B-13
VGA Frame Buffer A ...................................................................B-14
VGA Frame Buffer B ...................................................................B-15
VGA Frame Buffer B ...................................................................B-16
VGA I/O .......................................................................................B-17
VGA NVVDD Coupling ..............................................................B-18
PS8625 ..........................................................................................B-19
Panel, Inverter ...............................................................................B-20
CRT ...............................................................................................B-21
HDMI ............................................................................................B-22
PCH 1/9 ........................................................................................B-23
PCH 2/9 ........................................................................................B-24
PCH 3/9 ........................................................................................B-25

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PCH 4/9 ........................................................................................B-26
PCH 5/9 ........................................................................................B-27
PCH 6/9 ........................................................................................B-28
PCH 7/9 ........................................................................................B-29
PCH 8/9 ........................................................................................B-30
PCH 9/9 ........................................................................................B-31
M.2 3G Card .................................................................................B-32
M.2 WLAN+BT, SSD ..................................................................B-33
ASM 1142 & 2142 .......................................................................B-34
ASM Power ..................................................................................B-35
USB, Charger ...............................................................................B-36
Card Reader / LAN RTL8411B ...................................................B-37
HDD, Click TP, Audio, Hall Con.. ..............................................B-38
LED, CCD, TPM, Power SW Con. .............................................. B-39
Audio Codec ALC269 VC2 .........................................................B-40
KBC-ITE IT8587 .........................................................................B-41
5V, 5VS, 3.3V, 3.3VS, 3.3VA .....................................................B-42
VDD1.0, VCCIO ..........................................................................B-43
VDD3, VDD5 ...............................................................................B-44
DDR 1.2V/0.6VS, 2.5V ...............................................................B-45
VCore, VCCGT Output Stage ......................................................B-46
VCC_Core, VCCGT ....................................................................B-47
1.0DX_VCCSTG/VCCSFR_OC, 3.3VA .....................................B-48
VCCSA .........................................................................................B-49
AC_In, Charger ............................................................................B-50
NVVDD .......................................................................................B-51
FBVDDQ .....................................................................................B-52
PEX_VDD/3V3 ............................................................................B-53
Audio Board .................................................................................B-54
Power Switch Board .....................................................................B-55
Hall Sensor Board ........................................................................B-56
Click Board ..................................................................................B-57
LED Board ....................................................................................B-58
Power Sequence ............................................................................B-59
Updating the FLASH ROM BIOS......... C-1
Download the BIOS ........................................................................C-1
Unzip the downloaded files to a bootable CD/DVD or
USB Flash drive ..............................................................................C-1
Set the computer to boot from the external drive ...........................C-1
Use the flash tools to update the BIOS ...........................................C-2
Restart the computer (booting from the HDD) ...............................C-2

Introduction
Overview 1 - 1
1.Introduction
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. VGA & audio) is also found in the User’s Manual. The manual is shipped with the computer.
Operating systems (e.g. Windows 10, etc.) have their own manuals as do application softwares (e.g. word processing and
database programs). If you have questions about those programs, you should consult those manuals.
The N855HC series notebook is designed to be upgradeable. See Disassembly on page 2 - 1 for a detailed description of
the upgrade procedures for each specific component. Please take note of the warning and safety information indicated
by the “” symbol.
The balance of this chapter reviews the computer’s technical specifications and features.

Introduction
1 - 2 Specifications
1.Introduction
Specifications

Latest Specification Information
The specifications listed here are correct at the
time of sending them to the press. Certain items
(particularly processor types/speeds) may be
changed, delayed or updated due to the manu-
facturer's release schedule. Check with your
service center for more details.

CPU
The CPU is not a user serviceable part. Ac-
cessing the CPU in any way may violate your
warranty.
Processor Options
Intel® Kabylake H Processort
(2.70GHz)
8MB Smart Cache, 14nm, DDR4-2400MHz, TDP 45W
(2.40GHz)
8MB Smart Cache, 14nm, DDR4-2400MHz, TDP 45W
Core Logic
Intel® HM175 Chipset
BIOS
64Mb SPI Flash ROM
AMI BIOS
Memory
Two 260 Pin SO-DIMM Sockets Supporting DDR4 2400MHz
Memory
Memory Expandable up to 32GB
(The real memory operating frequency depends on the FSB
of the processor.)
LCD Options
15.6" (39.62cm), 16:9, HD (1366x768)/ FHD (1920x1080)
Video Adapter
Intel® Integrated GPU and NVIDIA® Discrete GPU
Supports Microsoft Hybrid Graphics
Intel Integrated GPU
Intel® UMA Graphics
Dynamic Frequency
Intel Dynamic Video Memory Technology
Microsoft DirectX®12 Compatible
NVIDIA® Discrete GPU
NVIDIA® GeForce GTX 950M
2GB GDDR5 Video RAM on board
Microsoft DirectX® 12 Compatible
Storage
One Changeable 2.5" 7.0mm (h) SATA3 HDD/SSD
(Factory Option) One M.2 SATA/PCIe Gen3 x4 Solid State
Drive (SSD)
Audio
High Definition Audio Compliant Interface
2 * Built-In Speakers
Built-In Array Microphone
Or
(Factory Option ) Built-In Microphone
Sound Blaster
™ Cinema 3
Security
Security (Kensington® Type) Lock Slot
BIOS Password
Intel PTT for systems without hardware TPM
(Factory Option) TPM v 2.0

Introduction
Specifications 1 - 3
1.Introduction
Keyboard
Full-size “WinKey” keyboard (with numeric keypad)
Or
(Factory Option) Full-size “WinKey” Illuminated White-LED
Keyboard (with numeric keypad)
Pointing Device
Built-in Touchpad
Interface
One USB 2.0 Port
One USB 3.0 (USB 3.1 Gen 1) Type A Port
One USB 3.0 (USB 3.1 Gen 1) Type A Port and one USB 3.0
(USB 3.1 Gen 1) Type C Port
Or
(Factory Option) One USB 3.1 Gen 2 Type A Port and one
USB 3.1 Gen 2 Type C Port
One HDMI-Out Port
Two Mini DisplayPorts 1.2
One Headphone-Out Jack
One Microphone-In Jack
One RJ-45 LAN Jack
One DC-in Jack
Card Reader
Embedded Multi-In-1 Card Reader
MMC (MultiMedia Card) / RS MMC
SD (Secure Digital) / Mini SD / SDHC/ SDXC
M.2 Slots
Slot 1 for WLAN and Bluetooth Combo Module
Slot 2 for SATA/PCIe Gen3 x4 SSD
(Factory Option) Slot 3 for 3G/4G Module
Communication
Built-In Gigabit Ethernet LAN
1.0M HD PC Camera Module
(Factory Option) 2.0M FHD PC Camera Module
(Factory Option) M.2 3G or 4G Module
WLAN/ Bluetooth M.2 Modules:
(Factory Option) Intel® Dual Band Wireless-AC 8265 Wire-
less LAN (802.11ac) + Bluetooth 4.1
(Factory Option) Intel® Dual band Wireless-AC 3168 Wire-
less LAN (802.11ac) + Bluetooth 4.0
Environmental Spec
Temperature
Operating: 5°C - 35°C
Non-Operating: -20°C - 60°C
Relative Humidity
Operating: 20% - 80%
Non-Operating: 10% - 90%
Power
Full Range AC/DC Adapter
AC Input: 100 - 240V, 50 - 60Hz
DC Output: 19.5V, 6.15A (120W)
(Factory Option) Removable 6 Cell Smart Lithium-Ion Bat-
tery Pack, 62WH
(Factory Option) Removable 6 Cell Smart Lithium-Ion Bat-
tery Pack, 47WH
Dimensions & Weight
378mm (w) * 267mm (d) * 24.9mm (h)
2.5kg (Barebone with 47WH Battery)

Introduction
1 - 4 External Locator - Top View with LCD Panel Open
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.
3. Built-In Array
Microphone
4. LCD
5. Power Button
6. Keyboard
7. Touchpad &
Buttons
2 1
7
6
4
5
33

Introduction
External Locator - Front & Right Side Views 1 - 5
1.Introduction
External Locator - Front & Right Side Views
Figure 2
Front View
1. LED Indicator
FRONT VIEW
1
RIGHT SIDE VIEW
124
356
Figure 3
Right Side View
1. Headphone-Out
Jack
2. Microphone-In
Jack
3. USB 2.0 Port
4. USB 3.0 (USB
3.1 Gen 1) Type
A Port
5. Vent
6. Security Lock
Slot

Introduction
1 - 6 External Locator - Left Side & Rear View
1.Introduction
External Locator - Left Side & Rear View
/
Figure 4
Left Side View
1. DC-In Jack
2. RJ-45 LAN Jack
3. External Display
Port
4. HDMI-Out Port
5. USB 3.0 (USB 3.1
Gen1)TypeCPort
Or
(Factory Option)
USB 3.1 Gen 2
Type C Port
6. USB 3.0 (USB 3.1
Gen 1) Type A Port
Or
(Factory Option)
USB 3.1 Gen 2
Type A Port
7. Multi-in-1 Card
LEFT SIDE VIEW
1234567
Figure 5
Rear View
1. Vent
REAR VIEW
1

Introduction
External Locator - Bottom View 1 - 7
1.Introduction
External Locator - Bottom View

Overheating
To prevent your com-
puter from overhea-
ting, make sure no-
thing blocks any vent
while the computer is
in use.
2
1
3
2
3
Figure 6
Bottom View
1. Battery
2. Vent
3. Speakers

Introduction
1 - 8 Mainboard Overview - Top (Key Parts)
1.Introduction
Mainboard Overview - Top (Key Parts)
Figure 7
Mainboard Top
Key Parts
1. KBC-ITE IT8587
1