Clevo L141CU User manual

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Notebook Computer
L140CU / L141CU
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
October 2019
Trademarks
Pentium and Celeron 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 L140CU /
L141CU series 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

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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 electrical 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 with an AC Input of 100 - 240V, 50 - 60Hz, DC Output of 19V,
3.42A (65 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 magnetic
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. Securely attach any peripherals you want to use with the
computer (e.g. keyboard and mouse) to their ports.
4. When first setting up the computer use the following
procedure (as to safeguard the computer during shipping,
the battery will be locked to not power the system until first
connected to the AC/DC adapter and initially set up as
below):
• Attach the AC/DC adapter cord to the DC-In jack on the
left of the computer, then plug the AC power cord into an
outlet, and connect the AC power cord to the AC/DC
adapter. The battery will now be unlocked.
5. Use one hand to raise the lid/LCD to a comfortable viewing
angle (do not exceed 180 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).
6. Press the power button on the left side of the computer to
turn it on (note that the lid/LCD must be open for the power
button to function).
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 below). This will help prevent
hard disk or system problems.
1. Click the Start Menu icon .
2. Click the Power item .
3. Choose Shut down from the menu.
Powering the
Computer On
After every disassem-
bly, make sure that the
bottom case’s screws
are all inserted and
tightened before turn-
ing the computer on.

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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 System Memory (RAM) ..........................................2-7
Removing the Wireless LAN Module .............................................2-9
Wireless LAN, and Combo Module Cables ..................................2-10
Removing the M.2 SSD Module ...................................................2-11
Removing the CCD .......................................................................2-13
Removing the LCD .......................................................................2-15
Part Lists ..................................................A-1
Part List Illustration Location ........................................................A-2
Top .................................................................................................A-3
Bottom ............................................................................................ A-4
LCD ................................................................................................ A-5
MB ................................................................................................. A-6
Schematic Diagrams.................................B-1
System Block Diagram ...................................................................B-2
Processor 1/12 .................................................................................B-3
Processor 2/12 .................................................................................B-4
Processor 3/12 .................................................................................B-5
Processor 4/12 .................................................................................B-6
Processor 5/12 .................................................................................B-7
Processor 6/12 .................................................................................B-8
Processor 7/12 .................................................................................B-9
Processor 8/12 ...............................................................................B-10
Processor 9/12 ...............................................................................B-11
Processor 10/12 .............................................................................B-12
Processor 11/12 .............................................................................B-13
Processor 12/12 .............................................................................B-14
DDR4 CH0-1 ................................................................................B-15
DDR4 CH0-2 ................................................................................B-16
DDR4 Terminations ......................................................................B-17
DDR4 Decaps ...............................................................................B-18
DDR4 SO-DIMM_1 .....................................................................B-19
HDMI ............................................................................................B-20
Panel .............................................................................................B-21
Type-C ..........................................................................................B-22
ANX7411 ......................................................................................B-23
USB Type-C Retimer ...................................................................B-24
Audio Codec .................................................................................B-25
RTS5227S .....................................................................................B-26
WLAN/BT ....................................................................................B-27
KBC ITE IT5570 ..........................................................................B-28
M Key PCIE SSD-1 ......................................................................B-29

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M Key PCIE SSD-2 ..................................................................... B-30
Conn, CCD, Fan, TP, LED KB .................................................... B-31
USB Charger, TPM ...................................................................... B-32
LED, LID SW, Power Switch ...................................................... B-33
3.3V, 5V, 3VS, 5VS, CTL ........................................................... B-34
VDD3, VDD5 ............................................................................... B-35
1.05VA, VCCST, VCCSTG ........................................................ B-36
VDDQ, VDDQ_VTT, 1.5VS, 1.8VA .......................................... B-37
AC_In ........................................................................................... B-38
VCore MP2979A .......................................................................... B-39
MP2979 IA Power Stage .............................................................. B-40
MP2979 GT/SA Power Stage ...................................................... B-41
VCCIO, 2.5V ................................................................................ B-42
Charger ......................................................................................... B-43
USB, LED .................................................................................... B-44
Power Seq. .................................................................................... B-45
Option BOM ................................................................................. B-46

Introduction
Overview 1 - 1
1.Introduction
Chapter 1: Introduction
Overview
This manual covers the information you need to service or upgrade the L140CU / L141CU 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. Window 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 L140CU / L141CU 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 informa-
tion 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® Core™ i7 Processor
i7-10510U (1.80GHz)
8MB Smart Cache, 14nm, DDR4-2666MHz, TDP 15W
Intel® Core™ i5 Processor
i5-10210U (1.60GHz)
6MB Smart Cache, 14nm, DDR4-2666MHz, TDP 15W
Intel® Core™ i3 Processor
i3-10110U (2.10GHz)
4MB Smart Cache, 14nm, DDR4-2666MHz, TDP 15W
BIOS
128Mb SPI Flash ROM
Insyde BIOS
Memory
Dual Channel DDR4
On Board DDR4 8GB
One 260 Pin SO-DIMM Socket Supporting DDR4 2666MHz
Memory
Memory Expandable up to 16GB
Compatible with 8GB or 16GB Modules
(The real memory operating frequency depends on the FSB
of the processor.)
LCD Options
14" (35.56cm), 16:9, FHD (1920x1080)
Storage
One M.2 SATA/PCIe Gen3 x4 Solid State Drive (SSD)
(Factory Option) One M.2 SATA Solid State Drive (SSD)
Video Adapter
Intel UHD Graphics 620
Dynamic Frequency
Intel Dynamic Video Memory Technology
Microsoft DirectX® 12 Compatible
Pointing Device
Built-In Secure Pad (with Microsoft PTP Multi Gesture &
Scrolling Functionality)
Keyboard
Multi languages A4 size White-LED Keyboard (with Numeric
Keypad)
Or
(Factory Option) Multi languages A4 sizeKeyboard (with
Numeric Keypad)
Audio
High Definition Audio Compliant Interface
2 * Built-In Speakers
Built-In Array Microphone
Security
Security (Kensington® Type) Lock Slot
BIOS Password
Intel PTT for Systems Without TPM Hardware
(Factory Option) TPM 2.0
M.2 Slots
Slot WLAN/BT for Combo WLAN and Bluetooth Module
Slot SSD 2 for SATA/PCIe Gen3 x4 SSD
(Factory Option) Slot SSD 1 for SATA SSD only

Introduction
Specifications 1 - 3
1.Introduction
Card Reader
MicroSD Card Reader
Interface
One DisplayPort 1.2 over USB 3.1 Gen 2 Type-C Port with
Power Delivery (DC-In)
One USB 3.0 (USB 3.1 Gen 1) Type-A Port
One USB 3.1 Gen 2 Type-A Port
One HDMI-Out Port
One 2-In-1 Audio Jack (Headphone and Microphone)
One DC-in Jack
Communication
1.0M HD Camera Module
Or
(Factory Option) Windows Hello Camera Module
WLAN/ Bluetooth M.2 Modules:
(Factory Option) Intel® Dual Band Wireless-AC 9560 Wire-
less LAN (802.11ac) + Bluetooth
(Factory Option) Intel® Dual Band Wi-Fi 6 AX200 Wireless
LAN (802.11ax) + Bluetooth
(Factory Option) Intel® Dual Band Wi-Fi 6 AX201 Wireless
LAN (802.11ax) + Bluetooth
Power
Full Range AC/DC Adapter
AC Input: 100 - 240V, 50 - 60Hz
DC Output: 19V, 3.42A (65W)
Embedded Lithium-Ion Polymer Battery Pack, 36WH
(Factory Option) Embedded Lithium-Ion Polymer Battery
Pack, 73WH
Environmental Spec
Temperature
Operating: 5°C - 35°C
Non-Operating: -20°C - 60°C
Relative Humidity
Operating: 20% - 80%
Non-Operating: 10% - 90%
Dimensions & Weight
322mm (w) * 216.8mm (d) * 16.5mm (h)
990g
Full System, Included on board 8GB DDR4 DRAM, 256GB
M.2 SSD, 36Wh battery, WLAN, 1.0M HD video camera and
backlit keyboard

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 in
white.
3. Built-In
Microphone
4. LCD
5. Vent
6. Keyboard
7. Touchpad &
Buttons
7
5
7
2 1 3
4
3
6
Note that the Touchpad and
Buttons has a valid opera-
tional area indicated within
the dotted lines.

Introduction
External Locator - Front & Right Side Views 1 - 5
1.Introduction
External Locator - Front & Right Side Views Figure 2
Front View
Figure 3
Right Side View
1. Speaker
2. Power Button
3. MicroSD Card
Reader
4. 2-In-1 Audio Jack
(Headphone and
Microphone)
5. USB 3.0 (USB 3.1
Gen 1) Type-A
Port
6. Security Lock Slot
FRONT VIEW
RIGHT SIDE VIEW
123456

Introduction
1 - 6 External Locator - Left Side & Rear View
1.Introduction
External Locator - Left Side & Rear View
/
Figure 4
Left Side View
1. LED Indicator
2. DC-In Jack
3. HDMI-Out Port
4. USB 3.1 Gen 2
Type-A Port
5. DisplayPort 1.2
over USB 3.1 Gen
2 Type-C Port with
Power Delivery
(DC-In)
6. Speaker
LEFT SIDE VIEW
123456
Figure 5
Rear View
REAR VIEW

Introduction
External Locator - Bottom View 1 - 7
1.Introduction
External Locator - Bottom View
Figure 6
Bottom View
1. Speakers
Overheating
To prevent your com-
puter from overhea-
ting, make sure no-
thing blocks any vent
while the computer is
in use.
11

Introduction
1 - 8 Mainboard Overview - Top (Key Parts)
1.Introduction
Mainboard Overview - Top (Key Parts)
Figure 7
Mainboard Top
Key Parts
1. KBC-ITE IT5570
1

1
2
Figure 8
Mainboard Bottom
Key Parts
1. CPU
2. Memory Slots
DDR4 SO-DIMM
Introduction
Mainboard Overview - Bottom (Key Parts) 1 - 9
1.Introduction
Mainboard Overview - Bottom (Key Parts)

Introduction
1 - 10 Mainboard Overview - Top (Connectors)
1.Introduction
Mainboard Overview - Top (Connectors)
Figure 9
Mainboard Top
Connectors
1. DC-In Jack
2. HDMI-Out Port
3. USB 3.1 Gen 2
Type-A Port
4. DisplayPort 1.2
over USB 3.1
Gen 2 Type-C
Port with Power
Delivery (DC-In)
5. Power Button
6. MicroSD Card
Reader
7. 2-In-1 Audio Jack
(Headphone and
Microphone)
8. USB 3.0 (USB 3.1
Gen 1) Type-A
Port
8
1
2
5
36
4
7