Giada DN74 User manual

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Statement
The copyright of this manual belongs to Shenzhen JEHE Technology Development Co., Ltd. (Giada,
JEHE’s global brand) and all rights are reserved. The company reserves the right to change this
manual at any time without notification. Specifications here are for reference only, please take the
real product as standard.
Without official authorization of Giada, other company or individual may not copy, plagiarize,
translate or disseminate this manual for commercial purpose.
The information provided in this manual is accurate and reliable. The company does not take any
legal responsibility for the consequences of infringement use of this manual.
Safety Notice
• Read the user manual carefully before setting up the Giada product.
• Disconnect the power cord before installing the internal components
• Most electronic components are sensitive to static electrical charge, please wear a wrist-grounding
strap when installing the internal components.
• Don’t disconnect the power cord when the system is running to avoid damage to the sensitive
components by instantaneous surge voltage.
Contact Information
Shenzhen JEHE Technology Development Co., Ltd.
Website: www.giadatech.com
Phone: [phone]
Email: [e-mail]
Address: 1~3/F, Block A, Tsinghua Information Harbor, North Section, Shenzhen Hi-tech
Park, Nanshan District, Shenzhen, China

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Table of Contents
1. Product Introduction ...................................................................................... 3
2. Interface Description and Hardware Specifications .................................... 3
2.1 Interface Description .................................................................................... 3
2.2 Hardware Specifications .............................................................................. 4
3. Accessories Installation Steps ......................................................................... 6
3.1 3G/4G Installation ........................................................................................ 6
3.2 SIM Card Installation ................................................................................... 6
4. How to play different videos on two screens................................................. 8
5. Firmware Upgrade Guide.............................................................................. 8
5.1 Preparation ................................................................................................. 8
5.2 Upgrade the firmware................................................................................. 9
5.2.1. Install the driver in your host PC by following steps ..................... 9
5.2.2. Connect the motherboard with host PC ........................................ 10
5.2.3. Start the firmware updating .......................................................... 11
6. JAHC APP ................................................................................................... 13
6.1 JAHC APP function ................................................................................ 13
6.2 Startup (open) & shutdown (close) time setup ....................................... 13
7. ADB SOP ..................................................................................................... 15

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1. Product Introduction
Giada DN74 adopts RK3399 Dual-core ARM Cortex-A72 and Quad-core ARM Cortex-A53 CPU,
Onboard memory and eMMC. With dual HDMI display output, it supports 1*4K and 1*2K
resolution. It is featured with Android 7.1 operation system. The player is suitable to be applied in
high-end Android digital signage applications.
2. Interface Description and Hardware Specifications
2.1 Interface Description
Front I/O Port
Rear I/O Port

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Right I/O port
2.2 Hardware Specifications
DN74
DN74-3399R42E5G-GIA V2
Processor
CPU
RK3399 Dual-core ARM Cortex-A72 and Quad-core ARM Cortex-A53 CPU
Frequency
Up to 1.5GHz
Chipset
SOC
Memory
Type
LPDDR4 support 2 channels
Socket
Onboard
Capacity
4GB（Optional: 2GB）
Graphics
GPU
Mali-T860MP4 GPU
Graphic Engine
4K H.264/H.265 video decoder
HDMI
1 x HDMI (Max 4K@60Hz), support CEC
1 x HDMI (Max 2K@30Hz)
Network
Controller
Realtek RTL8211E Gigabit Ethernet
Interface
1 x RJ45
I/O Interface
USB
1 x USB3.0 (OTG), 3 x USB2.0
Serial Port
1 x RS232
Audio
1 x MIC-IN, 1 x AUDIO-OUT
Mini-PCIe
1 x Full-size Mini-PCIe for 3G/4G
WiFi+BT Module
WiFi+BT Module Onboard (WiFi 5GHz) (Optional: 2.4GHz)
SIM Slot
1 x SIM Slot
LED Indicator
1 x HDD LED, 1x Power LED
Storage
eMMC
Onboard eMMC 32GB (Optional: 16G)
TF Card Reader
1 x TF Card Reader

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JAHC
JAHC
Watchdog / Auto power on/IR Remote Control / RTC/Wake On Lan
Operation
System
OS
Android7.1
Power
Power Type
DC-IN
Input Voltage
12V/2A
Mechanical
Construction
Metal
Fanless
Yes
Mounting
Desk/VESA Mounting（JC530）
Dimension
(W x D x H)
116.6mm x 107.4mm x 30mm
Color
Black
Environment
Operating
Temperature
0-40℃at 0.7m/s Air Flow
Relative Humidity
95%@40℃(non-condensing)
Certification
CE/FCC

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3. Accessories Installation Steps
For safety reasons, please ensure that the power cord is disconnected before opening the case.
How to open bottom cover
Unscrew the four screws and remove the bottom cover. (mini PCIE slot for 3G/4G and SIM card slot
are on this side)
3.1 3G/4G Installation
Default SMA connector and cable is for WIFI. Please change to 3G/4G SMA connector and cable.
1. Plug the 3G/4G module into the mini PCIE slot.
2. Secure the module to the carrier by tightening up the screw.
3. Connect the cable to Main and install the antenna.

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3.2 SIM Card Installation
This product supports standard SIM card with the size of 25mm × 15mm.
1. [Open] the SIM card holder and pull it up.
2. Insert the SIM card.
3. [Lock] the card holder.

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4. How to play different videos on two screens
The two HDMI ports on DN74 support clone mode, but you can play different videos on two screens
by following setup:
a. Install two different video player apps which support 4K decoding in DN74.
b. Connect DN74 with two HDMI screens, you can see they are clone mode.
c. Play one video with one of the video player app and press ‘Alt+D’ to enter into presentation.
display mode, then the video will show on the second screen.
d. Back to android home, then play another video by the other video player app. You will see the two
screens show different videos.
Note: According to DN74’s decoding capabilities, one output can be up to 4K@60FPS and the
other one will be 1080P@30FPS at the same.
5. Firmware Upgrade Guide
5. 1 Preparation:
DN74 player
Archive of DN74 firmware provided by Giada technical support
Host PC with screen and installed the Windows operation system.
USB OTG Cable (RP-SMA Male↔RP-SMA Male)
After you get the Archive from Giada technical support, copy the Archive to your host PC, you will
find below files inside:
Android Tool - tool for updating
DN74 Firmware image.
DriverAssitant - tool to install drivers and firmware image file

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5.2 Upgrade the firmware
5.2.1. Install the driver in your host PC by following steps:
a. Click the DriverAssitant file. Launch RK DriverAssitant and press “Install Driver”.
Apply all changes and warnings during the installation.
b. Click “ok” after the installation finish

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5.2.2. Connect the DN74 with host PC
In order to connect the DN74 with Host PC and run bootloader mode, you should perform following
steps:
a. Please ensure that the power of the DN74 player is disconnected
b. Run Android tool V2.63 under the windows of the host PC.
c. Connect the DN74 player to the host PC via usb OTG port (please refer to Fig1 for location of the
OTG port)
d. Firstly, hold the DN74 player recovery button (please refer to Fig1 for the location of the button),
then connect the power adaptor to the player, you will see “Found a MSC Device” or “Found One
Loader Device”. (Please refer to Fig2)
Please don't loosen the button and don't press twice until you see the 'Found a MSC Device' or
'Found One loader device'
( Fig1)

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(Fig2)
5.2.3. Start the firmware updating.
a. Click “Firmware” button and specify the path to the firmware file which is stored in the host PC
(Please refer to Fig2).
b. Wait around 5 seconds to upload the program, FW information will be displayed on the screen.
After the “Upgrade” button turns to black, you can click “Upgrade” to update the firmware (please
refer to Fig3 and Fig4).
(Fig3)

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(Fig4)
c. In the end, you will see a report indicating a successful operation.

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6. JAHC APP
6.1 JAHC APP functions
The user can set up automatic startup and shutdown, one week as a circle
6.2 Startup (open) & shutdown (close) time setup
System Requirements:
Giada player with JAHC APP function.
Android OS includes JAHC APP（please refer to Fig1）.
(Fig1)
a. After enter the android desktop, click the JAHC APP icon and the JAHC interface will pop up
(please refer to Fig2)
(Fig2)

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b. Click ‘New’ button to set open time (Fig3) and then click Close time button to set close time. One
week as a circle, maximum 3 schedules per day. Select each schedule to set up the Open time and
Close time.
c. After finishing the setup, click circles to launch the schedule.
User can click delete to remove the schedule.
(Fig3)
(Fig4)

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(Fig5)
Caution: If the interval from shutdown time to next resume time is less than 3 minutes, the system will
not shut down.
7. ADB SOP
The user can debug APP with ADB driver by below steps:
a. Use command ADB version to check if Windows ADB tool is installed.
b. Install Rock chip driver.
Connect DN74 with windows PC host by OTG cable.
Select ‘Connect to PC’ under android OS->Settings->USB->connect to PC.
Then you can use ADB shell command to enter ADB.

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