ASROCK J4105B-ITX User manual

Version 1.0
Published October 2017
Copyright©2017 ASRock 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 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. ASRock assumes no responsibility for
any errors or omissions that may appear in this documentation.
With respect to the contents of this documentation, ASRock 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, 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 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 Website: http://www.asrock.com

AUSTRALIA ONLY
Our goods come with guarantees that cannot be excluded under the Australian Consumer
Law. You are entitled to a replacement or refund for a major failure and compensation for
any other reasonably foreseeable loss or damage caused by our goods. You are also entitled
to have the goods repaired or replaced if the goods fail to be of acceptable quality and the
failure does not amount to a major failure. If you require assistance please call ASRock Tel
: [phone] ext.123 (Standard International call charges apply)
e terms HDMI™ and HDMI High-Denition Multimedia Interface, and the HDMI
logo are trademarks or registered trademarks of HDMI Licensing LLC in the United
States and other countries.

English
1
J4105B-ITX
J4005B-ITX
Motherboard Layout
13 12 11
1
9
3
2
4
5
6
7
810
14
PCIE1
ATXPWR1
AUDI O
CODE C
Super
I/O
DDR4_A1
DDR4_B1
CPU_FAN1
1
USB2_3
HDL ED RE SE T
PLE D PWR BT N
PANEL1
1
COM2
1
SATA3 _ 2
CMOS
Battery
RoHS
1
HD_AUDIO1
BIOS
ROM
Front USB 3.0
LAN
CLRMO S1
1
USB3_1_ 2
SATA3 _1
Top:
LINE IN
Center:
FRONT
Bottom:
MIC IN
1
USB4_5
HDMI1
PARALLEL PORT
COM1 VGA1
USB 3.1 Gen1
T: USB1
B: USB2
PS2
Keyboard/
Mouse
USB 3.1 Gen1:
USB4
RJ-45
USB 2.0: USB3
SPK_C I1
1

English
2
No. Description
1 CPU Fan Connector (CPU_FAN1)
2 ATX Power Connector (ATXPWR1)
3 System Panel Header (PANEL1)
4 Chassis Intrusion and Speaker Header (SPK_CI1)
5 Clear CMOS Jumper (CLRMOS1)
6 Chassis Fan Connector (CHA_FAN1)
7 2 x 260-pin DDR4 SO-DIMM Slots (DDR4_A1, DDR4_B1)
8 COM Port Header (COM2)
9 USB 2.0 Header (USB4_5)
10 USB 3.1 Gen1 Header (USB3_1_2)
11 USB 2.0 Header (USB2_3)
12 SATA3 Connector (SATA3_1)
13 SATA3 Connector (SATA3_2)
14 Front Panel Audio Header (HD_AUDIO1)

English
3
J4105B-ITX
J4005B-ITX
* ere are two LEDs on the LAN port. Please refer to the table below for the LAN port LED indications.
Activity / Link LED Speed LED
Status Description Status Description
O No Link O 10Mbps connection
Blinking Data Activity Orange 100Mbps connection
On Link Green 1Gbps connection
ACT/LINK LED
SPEED LED
LAN Port
I/O Panel
No. Description No. Description
1 PS/2 Mouse/Keyboard Port 7 USB 2.0 Port (USB3_3)
2 Parallel Port 8 USB 3.1 Gen1 Port (USB3_4)
3 LAN RJ-45 Port* 9 HDMI Port
4 Line In (Light Blue)** 10 D-Sub Port
5 Front Speaker (Lime)** 11 COM Port
6 Microphone (Pink)** 12 USB 3.1 Gen1 Ports (USB3_1_2)
79
1 2 3 5
6
8
11 1012
4

English
4
** To congure 7.1 CH HD Audio, it is required to use an HD front panel audio module and enable the multi-
channel audio feature through the audio driver.
Please set Speaker Conguration to “7.1 Speaker”in the Realtek HD Audio Manager.
Function of the Audio Ports in 7.1-channel Conguration:
Port Function
Light Blue (Rear panel) Rear Speaker Out
Lime (Rear panel) Front Speaker Out
Pink (Rear panel) Central /Subwoofer Speaker Out
Lime (Front panel) Side Speaker Out

English
5
J4105B-ITX
J4005B-ITX
Chapter 1 Introduction
ank you for purchasing ASRock J4105B-ITX / J4005B-ITX motherboard, a
reliable motherboard produced under ASRock’s consistently stringent quality
control. It delivers excellent performance with robust design conforming to
ASRock’s commitment to quality and endurance.
1.1 Package Contents
! ASRock J4105B-ITX / J4005B-ITX Motherboard (Mini-ITX Form Factor)
! ASRock J4105B-ITX / J4005B-ITX Quick Installation Guide
! ASRock J4105B-ITX / J4005B-ITX Support CD
! 2 x Serial ATA (SATA) Data Cables (Optional)
! 1 x I/O Panel Shield
Because the motherboard specications and the BIOS soware 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’s website without further notice. If you require technical support related to
this motherboard, please visit our website for specic information about the model
you are using. You may nd the latest VGA cards and CPU support list on ASRock’s
website as well. ASRock website http://www.asrock.com.

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1.2 Specications
Platform ! Mini-ITX Form Factor
! Solid Capacitor design
CPU ! Intel® Quad-Core Processor J4105 (up to 2.5 GHz)
(for J4105B-ITX)
! Intel® Dual-Core Processor J4005 (up to 2.7 GHz)
(for J4005B-ITX)
Memory ! Dual Channel DDR4 Memory Technology
! 2 x DDR4 SO-DIMM Slots
* 2GB DRAM per module is not supported.
! Supports DDR4 2400/2133 non-ECC, un-buered memory
! Max. capacity of system memory: 8GB
Expansion
Slot
! 1 x PCI Express 2.0 x16 Slot (PCIE1: x2 mode)
Graphics
tIntegrated Intel® UHD Graphics 600: 12 EUs inside (Up to
750MHz) (for J4105B-ITX)
tIntegrated Intel® UHD Graphics 600: 12 EUs inside (Up to
700MHz) (for J4005B-ITX)
tDX12, OpenGL 4.3, OGL ES 3.0, OpenCL 2.0
tHW Acceleration Decode: HEVC (H.265) 8 bit, HEVC
(H.265)10 bit, H.264 @ Lvl5.2 (AVC), JPEG/MJPEG, VP8,
VP9 8bit, VP9 10 bit
tHW Acceleration Encode: HEVC (H.265) 8 bit, HEVC
(H.265)10 bit, H.264 @ Lvl5.2 (AVC), JPEG/MJPEG, VP8,
VP9 8bit
tDual graphics output: support D-Sub and HDMI ports by
independent display controllers
tSupports HDMI with max. resolution up to 4K x 2K
(4096x2160) @ 30Hz
tSupports D-Sub with max. resolution up to 2048x1536 @
60Hz
tSupports Auto Lip Sync, xvYCC and HBR (High Bit Rate
Audio) with HDMI Port (Compliant HDMI monitor is
required)

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J4105B-ITX
J4005B-ITX
tSupports HDCP with HDMI Port
tSupports Full HD 1080p Blu-ray (BD) playback with HDMI
Port
Audio ! 7.1 CH HD Audio (Realtek ALC887 Audio Codec)
* To congure 7.1 CH HD Audio, it is required to use an HD
front panel audio module and enable the multi-channel audio
feature through the audio driver.
! Supports Surge Protection
! ELNA Audio Caps
LAN ! PCIE x1 Gigabit LAN 10/100/1000 Mb/s
! Realtek RTL8111H
! Supports Wake-On-LAN
! Supports Lightning/ESD Protection
! Supports Energy Ecient Ethernet 802.3az
! Supports PXE
Rear Panel
I/O
! 1 x PS/2 Mouse/Keyboard Port
! 1 x Parallel Port (ECP/EPP Support)
! 1 x Serial Port: COM1
! 1 x D-Sub Port
! 1 x HDMI Port
! 1 x USB 2.0 Port (Supports ESD Protection)
! 3 x USB 3.1 Gen1 Ports (Supports ESD Protection)
! 1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED
LED)
! HD Audio Jacks: Line in / Front Speaker / Microphone
Storage ! 2 x SATA3 6.0 Gb/s Connectors, support NCQ, AHCI and
Hot Plug
Connector ! 1 x COM Port Header
! 1 x Chassis Intrusion and Speaker Header
! 1 x CPU Fan Connector (3-pin)
! 1 x Chassis Fan Connector (3-pin)
! 1 x 24 pin ATX Power Connector
! 1 x Front Panel Audio Connector

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! 2 x USB 2.0 Headers (Support 4 USB 2.0 ports) (Supports ESD
Protection)
! 1 x USB 3.1 Gen1 Header (Supports 2 USB 3.1 Gen1 ports)
(Supports ESD Protection)
* USB3_1_2 is shared with USB2_3.
BIOS
Feature
! AMI UEFI Legal BIOS with GUI support
! Supports Plug and Play
! ACPI 5.0 compliant wake up events
! Supports jumperfree
! SMBIOS 3.0 support
Hardware
Monitor
! CPU/Chassis temperature sensing
! CPU/Chassis Fan Tachometer
! CPU/Chassis Quiet Fan (Auto adjust chassis fan speed by
CPU temperature)
! CPU/Chassis Fan multi-speed control
! CASE OPEN detection
! Voltage monitoring: +12V, +5V, +3.3V, CPU Vcore
OS ! Microso® Windows® 10 64-bit
Certica-
tions
! FCC, CE
! ErP/EuP ready (ErP/EuP ready power supply is required)
* For detailed product information, please visit our website: http://www.asrock.com

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9
J4105B-ITX
J4005B-ITX
is is a Mini-ITX form factor motherboard. Before you install the motherboard,
study the conguration of your chassis to ensure that the motherboard ts into it.
Pre-installation Precautions
Take note of the following precautions before you install motherboard components
or change any motherboard settings.
! Make sure to unplug the power cord before installing or removing the motherboard.
Failure to do so may cause physical injuries to you and damages to motherboard
components.
! In order to avoid damage from static electricity to the motherboard’s components,
NEVER place your motherboard directly on a carpet. Also remember to use a grounded
wrist strap or touch a safety grounded object before you handle the components.
! Hold components by the edges and do not touch the ICs.
! Whenever you uninstall any components, place them on a grounded anti-static pad or
in the bag that comes with the components.
! When placing screws to secure the motherboard to the chassis, please do not over-
tighten the screws! Doing so may damage the motherboard.
Chapter 2 Installation

English
10
2.1 Installing Memory Modules (SO-DIMM)
is motherboard provides two 260-pin DDR4 (Double Data Rate 4) SO-DIMM slots, and
supports Dual Channel Memory Technology.
Supported DDR4 Non ECC SODIMM
Raw Card
A (1Rx8)
B (2Rx8)
C (1Rx16)
Dual Channel Memory Conguration
DDR4_A1 Populated
DDR4_B1 Populated
1. It is not allowed to install a DDR, DDR2 or DDR3 memory module into a DDR4
slot; otherwise, this motherboard and SO-DIMM may be damaged.
2. e SO-DIMM only ts in one correct orientation. It will cause permanent damage
to the motherboard and the SO-DIMM if you force the SO-DIMM into the slot at
incorrect orientation.

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11
J4105B-ITX
J4005B-ITX
1
2
3

English
12
2.2 Expansion Slot (PCI Express Slot)
ere is 1 PCI Express slot on the motherboard.
PCIe slot:
PCIE1 (PCIe 2.0 x16 slot) is used for PCI Express x2 lane width cards.
Warning:
To ensure better graphics compability, the BIOS is set to "boot from Onboard VGA"
as default even the user install a VGA card on PCIe slot.
Before installing an expansion card, please make sure that the power supply is
switched o or the power cord is unplugged. Please read the documentation of the
expansion card and make necessary hardware settings for the card before you start the
installation.

English
13
J4105B-ITX
J4005B-ITX
2.3 Jumpers Setup
e illustration shows how jumpers are setup. When the jumper cap is placed on
the pins, the jumper is “Short”. If no jumper cap is placed on the pins, the jumper is
“Open”.
Clear CMOS Jumper
(CLRMOS1)
(see p.1, No. 5)
Short: Clear CMOS
Open: Default
CLRMOS1 allows you to clear the data in CMOS. e data in CMOS includes
system setup information such as system password, date, time, and system setup
parameters. ere are two ways for you to clear and reset the system parameters
to the default setup. Please turn o the computer and unplug the power cord, then
you may either short the solder points on CLRMOS1 by using metal material,
e.g., a paper clip for 3 seconds; or you may use a jumper cap to short the pin on
CLRMOS1 for 3 seconds. Please remember to remove the paper clip or the jumper
cap aer clearing the CMOS.
2-pin Jumper
*e jumper cap is not provided.
If you clear the CMOS, the case open may be detected. Please adjust the BIOS option
“Clear Status” to clear the record of previous chassis intrusion status.

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14
2.4 Onboard Headers and Connectors
System Panel Header
(9-pin PANEL1)
(see p.1, No. 3)
Connect the power
switch, reset switch and
system status indicator on
the chassis to this header
according to the pin
assignments below. Note
the positive and negative
pins before connecting
the cables.
Chassis Intrusion and
Speaker Header
(7-pin SPK_CI1)
(see p.1, No. 4)
Please connect the
chassis intrusion and the
chassis speaker to this
header.
PWRBTN (Power Switch):
Connect to the power switch on the chassis front panel. You may congure the way to
turn o your system using the power switch.
RESET (Reset Switch):
Connect to the reset switch on the chassis front panel. Press the reset switch to restart
the computer if the computer freezes and fails to perform a normal restart.
PLED (System Power LED):
Connect to the power status indicator on the chassis front panel. e LED is on when
the system is operating. e LED keeps blinking when the system is in S1/S3 sleep state.
e LED is o when the system is in S4 sleep state or powered o (S5).
HDLED (Hard Drive Activity LED):
Connect to the hard drive activity LED on the chassis front panel. e LED is on when
the hard drive is reading or writing data.
e front panel design may dier by chassis. A front panel module mainly consists
of power switch, reset switch, power LED, hard drive activity LED, speaker and etc.
When connecting your chassis front panel module to this header, make sure the wire
assignments and the pin assignments are matched correctly.
Onboard headers and connectors are NOT jumpers. Do NOT place jumper caps over
these headers and connectors. Placing jumper caps over the headers and connectors
will cause permanent damage to the motherboard.
GND RESET#
PWRBTN#
PLED-
PLED+
GND
HDLED-
HDLED+
1
GND

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15
J4105B-ITX
J4005B-ITX
Serial ATA3 Connectors
(SATA3_1:
see p.1, No. 12)
(SATA3_2:
see p.1, No. 13)
ese two SATA3
connectors support SATA
data cables for internal
storage devices with up to
6.0 Gb/s data transfer rate.
USB 2.0 Headers
(9-pin USB2_3)
(see p.1, No. 11)
(9-pin USB4_5)
(see p.1, No. 9)
ere are two headers
on this motherboard.
Each USB 2.0 header can
support two ports.
USB 3.1 Gen1 Header
(19-pin USB3_1_2)
(see p.1, No. 10)
ere is one header on
this motherboard. is
USB 3.1 Gen1 header can
support two ports.
Front Panel Audio Header
(9-pin HD_AUDIO1)
(see p.1, No. 14)
is header is for
connecting audio devices
to the front audio panel.
J_SENSE
OUT2_L
1
MIC_RET
PRESENCE#
GND
OUT2_R
MIC2_R
MIC2_L
OUT_RET
DUMMY
GND
GND
P+
P-
USB_PWR
P+
P-
USB_PWR
1
1
ID IntA_P_D +
IntA_P_D-
GND
IntA_P_SSTX+
IntA_P_SSTX-
GND
IntA_P_SSRX+
Vbus
IntA_P_D+
IntA_P_D-
GND
IntA_P_SSTX+
IntA_P_SSTX-
GND
IntA_P_SSRX+
IntA_P_SSRX-
Vbus
IntA_P_SSRX-
SATA3_2 SATA3_1

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Chassis Fan Connector
(3-pin CHA_FAN1)
(see p.1, No. 6)
Please connect fan cable
to the fan connector and
match the black wire to
the ground pin.
CPU Fan Connector
(3-pin CPU_FAN1)
(see p.1, No. 1)
Please connect the CPU
fan cable to the connector
and match the black wire
to the ground pin.
ATX Power Connector
(24-pin ATXPWR1)
(see p.1, No. 2)
is motherboard pro-
vides a 24-pin ATX power
connector. To use a 20-pin
ATX power supply, please
plug it along Pin 1 and Pin
13.
12 1
24
13
1. High Denition Audio supports Jack Sensing, but the panel wire on the chassis must
support HDA to function correctly. Please follow the instructions in our manual and
chassis manual to install your system.
2. If you use an AC’97 audio panel, please install it to the front panel audio header by
the steps below:
A. Connect Mic_IN (MIC) to MIC2_L.
B. Connect Audio_R (RIN) to OUT2_R and Audio_L (LIN) to OUT2_L.
C. Connect Ground (GND) to Ground (GND).
D. MIC_RET and OUT_RET are for the HD audio panel only. You don’t need to
connect them for the AC’97 audio panel.
E. To activate the front mic, go to the “FrontMic” Tab in the Realtek Control panel
and adjust “Recording Volume”.
GND
+12V
CPU_FAN_SPEED
GND
+12V
CHA_FAN_SPEED

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17
J4105B-ITX
J4005B-ITX
Serial Port Header
(9-pin COM2)
(see p.1, No. 8)
is COM2 header
supports a serial port
module.
CCTS# 1
RRTS#1
DDSR# 1
DDTR# 1
RRXD1
GND
TTXD 1
DDCD# 1
1
RRI#1