dynabook Satellite Pro L50-G User manual

Dynabook Personal Computer
Satellite Pro L50-G
dynabook P*-C*
(PBS10x/PBS11x/PBS12x)
(PBS20x/PBS21x/PBS22x)
Maintenance Manual
DYNABOOK CORPORATION
S/ No

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Satellite Pro L50-G / dynabookP*-C*
MaintenanceManual
Copyright
© 2019 by Dynabook Corporation. All rights reserved. Under the copyright laws, this
manual cannot be reproducedin any form without the prior written permission of Dynabook.
No patent liability is assumedwith respectto the useof the information contained herein.
Dynabook Satellite Pro L50-G / dynabook P*-C* MaintenanceManual
First edition Oct. of 2019
Disclaimer
The information presentedin this manual hasbeenreviewed and validated for accuracy. The
included setof instructions anddescriptions are accuratefor the Dynabook Satellite Pro L50-
G / dynabook P*-C* at the time of this manual'sproduction. However, succeedingcomputers
and manualsare subject to changewithout notice. Therefore, Dynabook assumesnoliability
for damagesincurred directly or indirectly from errors, omissions,or discrepanciesbetween
any succeeding product and this manual.
Trademarks
Intel and Celeron are registered trademarksof Intel Corporation.
Windows 10 areregisteredtrademarksof Microsoft Corporation.
Sound Blaster and Pro are trademarksof Creative Technology Ltd.
UNIX is a registeredtrademarkof X/Open CompanyLtd.
NetWare are registered trademarksof Novell, Inc.
All other properties aretrademarksor registered trademarksof their respective holders.

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Preface
This maintenancemanual describeshow to perform hardware service maintenancefor the
Dynabook PersonalComputer Satellite Pro L50-G /dynabook P*-C*, referred to asSatellite
Pro L50-G /dynabook P*-C* in this manual.
The proceduresdescribed in this manual are intended to help service technicians isolate
faulty Field ReplaceableUnits (FRUs) andreplacethem in the field.
SAFETY PRECAUTIONS
Four types of messagesareusedin this manual to bring important information to your
attention. Eachof thesemessageswill be italicized and identified asshown below.
DANGER: “Danger” indicates the existenceof a hazard that could result in death or
seriousbodily injury, if the safetyinstruction is not observed.
WARNING: “Warning” indicatesthe existenceofa hazardthat could result in bodily
injury, if the safetyinstruction is not observed.
CAUTION: “Caution” indicates the existenceof a hazardthat could result in property
damage,if the safetyinstruction is not observed.
NOTE: “Note” contains general information that relatesto your safemaintenance
service.
Improper repair of the computer may result in safety hazards.Dynabook requires service
technicians andauthorized dealersor service providers to ensurethe following safety
precautionsare adheredto strictly.
Be sureto fastenscrewssecurely with the right screwdriver. If a screwis not fully
fastened,it could comeloose, creating a dangerof a short circuit, which could cause
overheating, smokeor fire.
If you replace the battery pack or backup battery, be sure to useonly the samemodel
battery or an equivalent battery recommendedby Dynabook. Installation of the wrong
battery can causethe battery to explode.

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The manualis divided into the following parts:
Chapter1 Hardware Overview describesthe Satellite Pro L50-G /dynabook P*-
C* systemunits and eachFRU.
Chapter 2 Troubleshooting Proceduresexplains how to diagnoseand resolve
FRU problems.
Chapter 3 Test and Diagnostics describeshow to perform test anddiagnostic
operations for maintenanceservice.
Chapter 4 Replacement Proceduresdescribes the removal and replacement of the
FRUs.
Appendices The appendicesdescribe the following:
Handling the LCD module
Board layout
Keyboard scan/character codes
Key layout

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Conventions
This manual usesthe following formats to describe,identify, andhighlight termsand
operating procedures.
Acronyms
On the first appearanceandwhenever necessaryfor clarification acronyms are enclosedin
parenthesesfollowing their definition. For example:
ReadOnly Memory (ROM)
Keys
Keys are usedin the text to describe many operations. The key top symbol asit appearson
the keyboard is printed in boldfacetype.
Key operation
Someoperations require you to simultaneously usetwo or more keys. We identify such
operations by the key top symbols separatedby a plus (+) sign. For example, Ctrl + Pause
(Break) meansyou musthold down Ctrl and at the sametime pressPause (Break). If
three keys areused,hold down the first two and at the sametime pressthe third.
User input
Text that you areinstructed to type in is shown in the boldface type below:
DISKCOPY A: B:
The display
Text generatedby the XXXXX that appearson its display is presentedin the type facebelow:
Format complete
System transferred

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Table of Contents
Chapter 1 Hardware Overview
1.1 Features ................................................................................................................... 1-1
1.2 SystemUnit Components ..................................................................................... 1-10
1.3 2.5-inch HDD........................................................................................................ 1-15
1.4 Solid StateDrive (SSD) ........................................................................................ 1-16
1.5 PowerSupply ........................................................................................................ 1-17
1.6 Batteries ................................................................................................................ 1-18
1.6.1 Main Battery ....................................................................................... 1-18
1.6.2 Battery Charging Control ................................................................... 1-18
Chapter 2 Troubleshooting
2.1 Outline .................................................................................................................. 2-1
2.2 Basic Flowchart ..................................................................................................... 2-2
2.3 PowerSupply........................................................................................................... 2-6
Procedure1 PowerIcon Check ............................................................................ 2-6
Procedure2 Connection Check............................................................................ 2-8
Procedure3 ReplacementCheck.......................................................................... 2-8
2.4 SystemBoard ........................................................................................................... 2-9
Procedure1 MessageCheck................................................................................. 2-9
Procedure2 Test ProgramCheck....................................................................... 2-10
Procedure3 ReplacementCheck........................................................................ 2-10
2.5 HDD ......................................................................................................................2-11
Procedure2 Connector Check andReplacementCheck.................................... 2-11
2.6 Keyboard................................................................................................................ 2-12
Procedure1 Test ProgramCheck....................................................................... 2-12
Procedure2 Connector Check and ReplacementCheck .................................... 2-12
2.7 Display ................................................................................................................. 2-13
Procedure1 External Monitor Check ............................................................... 2-13

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Procedure2 Test ProgramCheck ....................................................................... 2-13
Procedure3 Connector Check and ReplacementCheck .................................... 2-13
2.8 Memory ..................................................................................................................2-15
Procedure1 Test ProgramCheck ....................................................................... 2-15
Procedure2 Connector Check and ReplacementCheck .................................... 2-15
2.9 SSD(Solid-state Drive)......................................................................................... 2-16
Procedure1 Test ProgramCheck ....................................................................... 2-17
2.10 Audio Test .............................................................................................................2-18
Procedure1 Windows Application Test ............................................................ 2-18
Procedure2 Connector Check and ReplacementCheck .................................... 2-18
2.11 Touchpad ............................................................................................................... 2-19
Procedure1 Windows Application Test ............................................................ 2-19
Procedure2 Connector Check and ReplacementCheck .................................... 2-19
2.12 USB Port ............................................................................................................... 2-20
Procedure1 Windows Application Test ............................................................ 2-20
Procedure2 Connector Check and ReplacementCheck .................................... 2-20
2.13 HeadphonePort...................................................................................................... 2-21
Procedure1 Windows Application Test ............................................................ 2-21
Procedure2 Connector Check and ReplacementCheck .................................... 2-21
2.14 Microphone Port .................................................................................................... 2-22
Procedure1 Windows Application Test ............................................................ 2-22
Procedure2 Connector Check and ReplacementCheck .................................... 2-22
2.15 Smart card Port ...................................................................................................... 2-23
Procedure1 Windows Application Test ............................................................ 2-23
Procedure2 Connector Check and ReplacementCheck .................................... 2-23
2.16 HDMI Port.............................................................................................................2-24
Procedure1 Windows Application Test ............................................................ 2-24
Procedure2 Connector Check and ReplacementCheck .................................... 2-24
2.17 SD card Port .......................................................................................................... 2-25
Procedure1 Windows Application Test ............................................................ 2-25
Procedure2 Connector Check and ReplacementCheck .................................... 2-25
2.18 Camera................................................................................................................... 2-26

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Procedure1 Windows Application Test ............................................................ 2-26
Procedure2 Connector Check and ReplacementCheck.................................... 2-26
2.19 WirelessLAN ....................................................................................................... 2-27
Procedure1 Windows Application Test ............................................................ 2-27
Procedure2 Connector Check and ReplacementCheck.................................... 2-27
2.20 Battery Pack .......................................................................................................... 2-28
Procedure1 Windows Application dischargeTest ........................................... 2-28
Procedure2 Windows Application chargeTest ................................................ 2-28
Procedure3 Connector Check and ReplacementCheck.................................... 2-28
2.21 Finger Print ........................................................................................................... 2-30
Procedure1 Windows Application ................................................................... 2-30
Procedure2 Connector Check and ReplacementCheck.................................... 2-30
2.22 Bluetooth ............................................................................................................... 2-31
Procedure1 Windows Application Test ............................................................ 2-31
Procedure2 Connector Check and ReplacementCheck.................................... 2-31
2.23 LAN Port ...............................................................................................................2-32
Procedure1 Windows Application Test ............................................................ 2-32
Procedure2 Connector Check and ReplacementCheck.................................... 2-32
Chapter 3 Diagnostic Programs
3.1 General ........................................................................................................................1
3.2 Main Menu..................................................................................................................2
3.2.1 SystemInformation....................................................................................4
3.2.2 CPU Test ....................................................................................................6
3.2.3 Memory Test .............................................................................................7
3.2.4 HDD Test ................................................................................................11
3.2.5 Video Test ...............................................................................................13
3.2.6 Keyboard Layout Test .............................................................................14
3.2.7 LED Test .................................................................................................16
3.2.8 FAN Test .................................................................................................19
3.2.9 DMI Read/ Write ...................................................................................20

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3.2.10 SSDTest ................................................................................................. 22
3.2.11 View Logs .............................................................................................. 24
3.2.12 Exit to UEFI Shell .................................................................................. 26
3.3 Subtests...................................................................................................................... 27
Chapter 4 Replacement Procedures
4.1 General .................................................................................................................... 4-1
Before You Begin .............................................................................................. 4-4
DisassemblyProcedures.................................................................................... 4-5
Assembly Procedures......................................................................................... 4-5
Tools and Equipment ........................................................................................ 4-6
ScrewTightening Torque................................................................................... 4-6
Colors of Screw Shanks..................................................................................... 4-7
Symbols of Screwson the Computer Body ...................................................... 4-7
Symbol examples .............................................................................................. 4-7
4.2 Memory cover ......................................................................................................... 4-8
Removing Memory cover ................................................................................. 4-8
Installing Memory cover ...................................................................................4-9
4.3 Memory module .................................................................................................... 4-10
Removing Memory module ............................................................................ 4-10
Installing Memory module .............................................................................4-11
4.4 BaseEnclosure ...................................................................................................... 4-12
Removing BaseEnclosure .............................................................................. 4-12
Installing the BaseEnclosure .......................................................................... 4-12
4.5 Battery Pack .......................................................................................................... 4-13
Removing Battery Pack .................................................................................. 4-13
Installing Battery Pack ....................................................................................4-15
4.6 HDD ......................................................................................................................4-16
RemoveHDD .................................................................................................. 4-16
Installing HDD ................................................................................................4-17
4.7 SSD ........................................................................................................................ 4-18
Removing SSD ............................................................................................... 4-18

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Installing SSD ................................................................................................. 4-19
4.8 WirelessLAN Card ................................................................................................ 4-20
Removing the WirelessLAN Card .................................................................. 4-20
Installing the WirelessLAN Card ................................................................... 4-22
4.9 SmartCard Board ................................................................................................... 4-23
RemoveSmartCard Board............................................................................... 4-23
Installing SmartCard Board ............................................................................ 4-24
4.10 LCD Module Assembly ......................................................................................... 4-25
RemoveLCD Module Assembly .......................................................................... 4-25
Installing LCD Module Assembly........................................................................4-26
4.11 DC-IN harness........................................................................................................ 4-27
Removing DC-IN harness ..................................................................................... 4-27
Installing DC-IN harness ......................................................................................4-27
4.12 CPU Cooling Module and Fan............................................................................... 4-28
Removing CPU Cooling Module and Fan............................................................. 4-28
Installing CPU Cooling Module and Fan ............................................................. 4-30
4.13 SystemBoard ......................................................................................................... 4-31
RemoveSystemBoard........................................................................................... 4-31
Installing SystemBoard ........................................................................................ 4-32
4.14 LED boardandIO board ....................................................................................... 4-33
Removing LED board andIO board ..................................................................... 4-33
Installing LED boardandIO board ...................................................................... 4-34
4.15 Speakerand Touch pad(or Securepad).................................................................. 4-35
Removing Speakerand Touch pad(or Securepad) ............................................... 4-35
Installing SpeakerandTouch pad(or Securepad)................................................. 4-36
4.16 LCD Module Mask ................................................................................................ 4-37
Removing LCD Module Mask .............................................................................. 4-37
Installing LCD Module Mask ...............................................................................4-37
4.17 LED Panel .............................................................................................................. 4-38
Removing LED Panel ........................................................................................... 4-38
Installing LED Panel .............................................................................................4-41
4.18 CCD Module .......................................................................................................... 4-42

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Removing CCD Module ..................................................................................... 4-42
Installing CCD Module .......................................................................................4-42

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Appendices
Appendix A Handling the LCD Module ............................................................................A-1
Appendix B Board Layout .................................................................................................B-1
B.1 SystemBoard Front View................................................................................... B-1
B.2 SystemBoard Back View ................................................................................... B-2
Appendix C Keyboard Scan/CharacterCodes................................................................... C-1
Appendix D Key Layout ....................................................................................................D-1

1SatellitePro L50-G / DynabookP* -C* MaintenanceManual
Chapter 1
Hardware Overview

1 Hardware Overview
2SatellitePro L50-G / DynabookP* -C* MaintenanceManual
Chapter 1 Contents
1.1 Features ................................................................................................................................ 3
1.2 SystemUnit Components................................................................................................... 10
1.3 2.5-inch HDD .....................................................................................................................15
1.4 Solid StateDrive (SSD) ..................................................................................................... 16
1.5 PowerSupply ..................................................................................................................... 17
1.6 Batteries..............................................................................................................................18
1.61 Main Battery ..........................................................................................18
1.62 Battery Charging Control ...................................................................... 18
Figures
Figure 1-1 ID PartsDescription Placement............................................................................... 7
Figure 1-2 ComputerBlock Diagram ........................................................................................ 8
Figure 1-3 SystemBoard Configurations .................................................................................. 9
Figure 1-4 SystemUnit Block Diagram...................................................................................10
Figure 1-5 SATA HDD ...........................................................................................................15
Figure 1-6 Solid statedriver..................................................................................................... 16
Tables
Table 1-1 HDD Specifications................................................................................................. 15
Table 1-2 SSDSpecifications .................................................................................................. 16
Table 1-3 Battery Specifications.............................................................................................. 18
Table 1-4 Quick/Normal Charging Time................................................................................. 18

1.1 Features 1 Hardware Overview
3SatellitePro L50-G / DynabookP* -C* MaintenanceManual
1.1 Features
Dynabook Satellite Pro L50-G is a Slim and Light entry notebook PC basedon the mobile Intel
Comet lake series Processor,providing high-speed processing capabilities and advancedfeatures.
The computer employs a Lithium Ion battery that allows it to be battery-operated for a longer
period of time. The display uses 15.6-inch FHD and HD LED panel, at a resolution of
1920x1080 and 1366x768. The CPU packageis BGA type.
The computer hasthe following features:
Processor
CPU is mobile Intel Comet Lake Processor:
Intel Comet Lake Celeron CPU
Celeron 5205U (1.90G) Hz
Intel Comet Lake Core i3 CPU
Core i3-10110U (2.10G) Hz
Intel Comet Lake Core i5 CPU
Core i5-10210U (1.60G) Hz
Intel Comet Lake Core i7 CPU
Core i7-10510U (1.80G) Hz
Core i7-10710U (1.10G) Hz
Host Bridge SystemController
SystemController: Intel integrated Host bridge systeminto CPU.
Graphics
Internal: Intel Comet Lake integrated.
External:NVIDIA MX250 graphics.
Memory

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4SatellitePro L50-G / DynabookP* -C* MaintenanceManual
The computer has two SO-DIMM slots, which come standard with DDR memory
module. DDR4 is driven at 1.2V. It acceptsBTO for your memory requirements. It can
incorporate up to 16GB of main memory.
Using the following sizesof memory modules:
4096 MB (512M64) /DDR4-2666MHz
8192 MB (1024M64) /DDR4-2666MHz
(The data transfer rate is varying by CPU, PC4-2666 on i3/i5/i7 but PC4-2400 on
Celeron 5205U)
Hard Disk Drive (HDD)
The computer accommodates2.5-inch 7mm height SATA HDD with following storage
capacities:
1 TB (7mm thick) SATA (5,400rpm)
Solid StateDrive (SSD)
The computer accommodatesSSDwith following types:
SATA SSDM.2 128GB/256GB
PCIe SSDM.2 256GB/512GB
Optane PCIe SSDM.2 512GB+32GB
Optane PCIe SSD M.2 16GB
Display
LCD displays comein the following type at resolution 1920x1080 and1366x768:
15.6" FHD 250nits eDP1920x1080In-Cell touch LED display
15.6” FHD 250nits eDP1920x1080LED display
15.6" HD 220nits eDP1366x768 LED display
15.6” FHD 470nits eDP1920x1080LED display
Touch Screen(Design capableonly for FHD in-cell touch LED)

1.1 Features 1 Hardware Overview
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SupportCapacitive type Touch ScreenFunction with 10 points Multi-finger.
On-BoardLAN
The internal LAN supports 10/100/1Gbit Ethernet, enabling connection to a LAN at up
to 1Gbps. It supports Wake-up on LAN from S3/S4/S5 and PXE boot support. This
internal LAN hasRJ45jack to directly accommodateaLAN cable.
WirelessLAN
The internal Mini Card slot supports IEEE802.11ax+agn + Bluetooth5.0 and
IEEE802.11ac+agn + Bluetooth4.2 combo Wireless LAN cards. The Antenna has two
wires dual band.
Sound System
REALTEK ALC255 integrated audio controller supportsmultimedia. The soundsystem
containsthe following:
Stereo speakers
Headphone jack
Integrated microphone (with Webcam)
External microphone jack
Keyboard
26 kinds’ countries keyboard, which is Non-backlight keyboard + 10 Keys black color
for US/UK keyboard with 100keys layout and White color for JPN keyboard with 105
keys layout.
Pointing Device
Click Pad and Secure Pad two pointing device support. Gesture support for precision
function asTapping/Tap andDrag/Pinch zoom/Up to 4 fingers.
USB Port
The computer has four USB ports, two for USB3.0 type A and one of USB3.0 type A
support Sleep & Charge Function. Another One is USB type C (USB3.1 Gen1/DP/PD).
High-Speed USB3.0/3.1 allows datatransfers up to 5Gbps,

1 Hardware Overview 1.1 Features
6SatellitePro L50-G / DynabookP* -C* MaintenanceManual
HDMI Out Port
A HDMI monitor canbeconnectedto HDMI Out Port on the computer.
Bridge Media Slot
This slot is for your memory card requirementslike SD/Mini SD (needadaptor)/Micro
SD (need adaptor)/SDHC/SDXC and MMC Cards to provide memory card readon your
computer.
Webcamwith embeddedinternal microphone
The computer has an internal camera.It supports HD (0.92M) with Camerashutter and
FHD(2M). It also supportsCameraLED, LED is on when Cameraworking. The internal
microphone is embeddedin this cameramodule.
Battery
The computer has a 4 Cell (2480mAh) Lithium Ion battery pack and integrated RTC
battery function.

1.1 Features 1 Hardware Overview
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Figures 1-1/1-2/1-3 and 1-4 show the computer and its system unit configuration,
respectively.
Figure 1-1 ID PartsDescription Placement

1 Hardware Overview 1.1 Features
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Figure 1-2 ComputerBlock Diagram