ASROCK 1U4LW Series User manual

1U4LW Series
User Manual
Version 1.0
Published October 2019
Copyright©2019 ASRock Rack INC. All rights reserved.

Version 1.0
Published September 2020
Copyright©2020 ASRock Rack Inc. All rights reserved.
Copyright Notice:
No part of this documentation may be reproduced, transcribed, transmitted, or
translated in any language, in any form or by any means, except duplication of
documentation by the purchaser for backup purpose, without written consent of
ASRock Rack Inc.
Products and corporate names appearing in this documentation may or may not
be registered trademarks or copyrights of their respective companies, and are used
only for identication or explanation and to the owners’ benet, without intent to
infringe.
Disclaimer:
Specications and information contained in this documentation are furnished
for informational use only and subject to change without notice, and should not
be constructed as a commitment by ASRock Rack. ASRock Rack assumes no
responsibility for any errors or omissions that may appear in this documentation.
With respect to the contents of this documentation, ASRock Rack does not provide
warranty of any kind, either expressed or implied, including but not limited to
the implied warranties or conditions of merchantability or tness for a particular
purpose.
In no event shall ASRock Rack, its directors, ocers, employees, or agents be liable
for any indirect, special, incidental, or consequential damages (including damages
for loss of prots, loss of business, loss of data, interruption of business and the
like), even if ASRock Rack has been advised of the possibility of such damages
arising from any defect or error in the documentation or product.
is device complies with Part 15 of the FCC Rules. Operation is subject to the following
two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that
may cause undesired operation.
CALIFORNIA, USA ONLY
e Lithium battery adopted on this motherboard contains Perchlorate, a toxic substance
controlled in Perchlorate Best Management Practices (BMP) regulations passed by the
California Legislature. When you discard the Lithium battery in California, USA, please
follow the related regulations in advance.
“Perchlorate Material-special handling may apply, see www.dtsc.ca.gov/hazardouswaste/
perchlorate”
ASRock Rack’s Website: www.ASRockRack.com

Setting up the Server in a Restricted Access Location
• Access can only be gained by service persons or by users who have been instructed
about the reasons for the restrictions applied to the location and about any precautions
that shall be taken.
• Access is through the use of a tool or lock and key, or other means of security, and is
controlled by the authority responsible for the location.
• Leave enough clearance (25 inches in the front and 30 inches in the back of the rack) to
allow the front door to be opened completely and to allow for sucient airow.
• is product is for installation merely in a Restricted Access Location.
• is product is not suitable for use with visual display work place devices according to §2
of the the German Ordinance for Work with Visual Display Units.
Replaceable Batteries
CAUTION
RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE.
DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS
Warning
When removal of the chassis lid required for servicing:
- Turn o power and unplug any power cords/cables, and
- Reinstall the chassis lid before restoring power.
Important Safety Instructions
Pay close attention to the following safety instructions before performing any of
the operation. Basic safety precautions should be followed to protect yourself from
harm and the product from damage:
• Operation of the product should be carried out by suitably trained, qualied, and
certied personnel only to avoid risk of injury from electrical shock or energy hazard.
• Disconnect the power cord from the wall outlet when installing or removing main
system components, such as the motherboard and power supply unit.
• Place the system on a stable and at surface.
• Use extreme caution when working with high-voltage components.
• When handling parts, use a grounded wrist strap designed to prevent static discharge.
• Keep the area around the system clean and clutter-free.
• Keep all components and printed circuit boards (PCBs) in their antistatic bags when
not in use.
• Handle a board by its edges only; do not touch its components, peripheral chips,
memory modules or contacts.

Contents
Chapter 1 Introduction 1
1.1 Shipping Box Contents 2
1.2 Specications 3
Chapter 2 Server System Overview 4
2.1 System Components 4
2.2 Internal Features 5
2.3 System Front Panel 6
2.4 System Rear Panel 6
2.5 Front Control Panel Buttons and LEDs 7
2.6 Drive Tray LEDs 9
Chapter 3 Hardware Installation and Maintenance 10
3.1 Server Top Cover 11
3.2 Hard Drive 13
3.3 System Fan 15
3.4 Backplane 16
3.5 Server Board 17
3.6 Add-on Card 18
3.7 Air Duct 20
Chapter 4 Chassis Cables 23
Chapter 5 Board Specications 24
5.1 Hard Drive Backplanes (BPB) 24
5.2 Front Panel Board (FPB) 27

Appendix A 28
Installing the CPU (Single Socket H4 (LGA1151)) 28
Installing the CPU Fan and Heatsink 30
Installation of Memory Modules (DIMM) 31

1U4LW Series
PB 1
English
Chapter 1 Introduction
ank you for purchasing 1U4LW Series, a reliable barebone system produced
under ASRock Rack’s consistently stringent quality control. It delivers excellent
performance with robust design conforming to ASRock Rack’s commitment to
quality and endurance.
Because the hardware specications might be updated, the content of this documentation
will be subject to change without notice. In case any modications of this documentation
occur, the updated version will be available on ASRock Rack’s website without further
notice. If you require technical support related to this product, please visit our website for
specic information about the model you are using.
ASRock Rack’s Website: www.ASRockRack.com
e illustrations shown in this manual are examples only, the actual system may dier
slightly .

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English
Item Quantity
1U4LW Series Barebone (1U form factor) 1
System Boards (MB)* 1
Power Supply Unit(s)* 1 or 2
System Fans* 5
HDD Backplane (BPB)* 1
Front Panel Board (FPB)* 1
Fan Cable (L:300mm) 1
SATA Cable 1
Accessory Box 1
1U Cooler 1
Riser Board 1
Air Duct (for 1U4LW-X470 only) 3
Slide Rail 1
1.1 Shipping Box Contents
* e components are pre-installed.
If any items are missing or appear damaged, contact your authorized dealer.

1U4LW Series
2 3
English
1.2 Specications
1U4LW Series
System Physical Status
Form Factor 1U Rackmount
Dimension
(D x W x H)
536.35 x 482.6 x 43.7 mm (21" x 19" x 1.72")
Support MB Size mATX / ATX
Front Panel
Buttons • Power On/Standby button
• ID button
• System reset button
• NMI button
LEDs • Power LED
• Identication LED
• Hard drive activity LED
• 2 x Network activity LEDs
• System event LED
I/O Ports 2 x USB 3.0 ports
External Drive Bay
Front Side Drive
Bay
4 Bay 3.5'' SATA HDD (6Gb/s)
System Cooling
Fan 40 x 28 mm PWM Easy-Swap Fans x 5
Power Supply
Type Single PSU (Flex-ATX) Redundant PSU
Output Watts 400W 300W
Eciency Gold Gold
*Please be noted that the functions are supported depending on the type of the server board.
Please refer to the user manual of the motherboard you use for detailed information about
motherboard components and features.

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English
Chapter 2 Server System Overview
is chapter provides diagrams showing the location of important components of
the server system.
2.1 System Components
System Fans
Server Board
Top Cover
Front Controls and Indicators
Power Supply Unit(s)
4 x 3.5” Hot-Swap HDD Trays

1U4LW Series
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English
2.2 Internal Features
9
10
14
5
1
6 87
2
3
4
11 12 13
No. From
1Riser Card
2Serverboard
3Power Supply Unit (PSU)
4System Fan 5
5System Fan 4
6System Fan 3
7System Fan 2
8System Fan 1
9HDD Backplane Board (BPB)
10 Front Panel Board (FPB)
11 2.5" SATA HDD
12 2.5" SATA HDD
13 2.5" SATA HDD or Slim ODD
14 4 x 3.5" SATA HDDs (Hot-swapable)

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English
2.3 System Front Panel
2
13
No. Description
1 Control Panel Buttons and LEDs
2 2 x USB 3.0 Ports
3 4 x 3.5" Hot-Swap HDD Trays
2.4 System Rear Panel
341 2
No. Description
1 Power Supply Unit
2Rea r Vent
3 I/O Shield (depends on the specication of the server board)
4 PCI Express Slot (for the riser card)

1U4LW Series
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English
2.5 Front Control Panel Buttons and LEDs
Front Control Panel
NMI RST L1 L2 SYS
ID
12
7
6
5
34
L3 L4
No. Description
1 ID Button and LED
2 Power Button and LED
3 NMI (Nonmaskable Interrupt) Button
4 System Reset Button
5 LAN1, LAN2, LAN3, LAN4 Activity LED
6 HDD Status LED
7 System Status LED
*Please be noted that the functions are supported depending on the type of the server board.
NMI (Nonmaskable Interrupt) Button
Press the NMI button with a paper clip or pin to generate a nonmaskable interrupt and to
put the server in a halt state for examination.
System Reset Button
When the system is completely unresponsive, press the system reset button to reboot the
server without shutting it o and initialize the system.
ID Button
Press the ID button to toggle the front panel ID LED and the baseboard ID LED on and
o. You are able to locate the server you’re working on from behind a rack of servers.
Power Button
Press the power switch button to toggle the system power on and standby/sleep modes.
To remove all power from the system completely, disconnect the power cord from the
server.

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English
Status LED Denitions
Power LED
Status Description
Blue Power on
Blinking Blue Standby(Sleep) mode
O Power o
ID LED
Status Description
Blue System identication is active.
O System identication is disabled.
System Status LED
Status Description
O Running or normal operation
Yel low At least one sensor has critical alert
HDD Status LED
Status Description
Blinking Green HDD access
O HDD idle
LAN1, LAN2 LED
Status Description
Amber Link between system and network or no access
Blinking Amber Network access

1U4LW Series
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English
2.6 Drive Tray LEDs
1
2
No. Description
1 HDD Power LED
2 HDD Activity LED
Status LED Denitions
HDD Power LED
Status Description
Blue HDD powered-on
O No power to HDD
HDD Activity LED
Status Description
Solid Green HDD active
Blinking Green HDD accessing or reading
Red HDD failed
O HDD powered-o

10 11
English
Chapter 3 Hardware Installation and
Maintenance
is chapter helps you assemble the chassis and install components.
Before You Begin
Before you work with the server, pay close attention to the “Important Safety Instructions”
at the beginning of this manual.
1. Make sure the server is powered o.
Power down the server if it is still running.
(1) Press the Power button to power o the server from full-power mode to standby-
power (sleep) mode. e Power LED at the front turns from solid green to blinking
green.
(2) Disconnect the power cord rst from the AC outlet and then from the server.
e power LED turns o.
2. Ensure you have a clean and stable working environment. Avoid dust and dirt because
contaminants may cause malfunctions.
3. Ground yourself properly before touching any system component. A discharge of static
electricity may damage components. Wear a grounded wrist strap if available.
Installing Procedures
e followings are prerequisite to be installed.
• 3.5" HDD(s)
• Power Supply Unit(s) (Pre-installed)
• System Fans (Pre-installed)
• Server Board (Pre-installed)
• HDD Backplane (Pre-installed)
e server is not completely powered down when you press the Power button on the front
panel. e Power button lets the server toggle between Power On and Standby (Sleep)
modes. Some internal circuitry remain active in the Standby mode. To remove all power
from the system completely, be sure to disconnect the power cord from the server.
1. Some components are already pre-installed. Simply properly connect the relavant cables before
or aer installation. See the Quick Installation Guide for more details.
2. Refer to the user manual of the server board you use for instructions on how to install server
board components.

1U4LW Series
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3.1 Server Top Cover
Removing the Server Top Cover
1
2
1. Remove the screws that secure the top cover to the chassis.
2. Push the top cover toward the rear of the chassis to remove the cover from the locked
position.
3. Li up and remove the top cover.
1. Before removing the top cover, power o the server and unplug the power cord.
2. e system must be operated with the chassis top cover installed to ensure proper cooling.

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English
Installing the Server Top Cover
2
1
1. Lower the top cover on the chassis, making sure the side latches align with the cutouts.
2. Slide the top cover toward the front.
3. Secure the top cover with the screws.

1U4LW Series
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English
3.2 Hard Drive
Removing 3.5” Hard Drive Trays from the Chassis
1. Press the locking lever latch on the drive tray to unlock the retention lever.
2. Rotate the lever out and away from the module bay and pull the hard drive out of the
HDD tray.
2
1

14 15
English
Installing a 3.5” Hard Drive to the Hard Drive Tray
1. Place the 3.5" HDD into the tray with the printed circuit board side facing down.
Carefully align the mounting holes in the hard drive and the tray.
2. Secure the hard drive using the four screws.
3. Slide the drive tray into the HDD bay until the drive is fully seated.
4. Push in the locking lever to lock the HDD tray into place.
12
3
4