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26 ODROID-XU4 USER MANUALxzutils package from http://tukaani.org/xz/, making sure to selectthe OSX binaries, and use it to uncompress the image:$ xz -d Other differences are that the block size (bs) parameter for the“dd” command is in lowercase, and the USB adapter’s device nameis in the format /dev/diskX. Before writing the image to SD Card oreMMC module using the “dd” utility, run the command “diskutil” to de-termine the device name, then unmount it:$ diskutil list$ diskutil unmountdisk /dev/diskX$ sudo dd of=/dev/diskX bs=1m if=Inserting the eMMC Module or SD CardNow that the desired image has been flashed on to the boot me-dia, it’s time to insert the boot media into the appropriate port on theXU4. Ensure that the work area is clear of unnecessary items. Wearthe grounded wristband. Touch a metallic surface, like that of your desk-top. Then, open the XU4 packaging box. Place the anti-static bag con-taining the XU4 board, on to the non-conductive work surface. Openthe bag and remove the board, holding the edges. Avoid touching anyof the components, peripheral connectors, ports, exposed circuits oron board solder. Place the board on the work surface, with the bottomside up. Check the annotated diagrams and follow the instructions fromChapter 1 for inserting the eMMC module or SD card.Powering UpBefore powering the board, attach all peripherals as described inChapter 1. Insert the power cable, which will be indicated by the redLED lighting up, and wait for the image to boot to desktop. It will takeanywhere from 20 seconds to 2 minutes for the desktop to appear,depending on the operating system and the type of boot media used.TroubleshootingRed LED not glowingIf the red LED is not glowing, power is not being supplied tothe board. Check the connections, and verify that the plug is insert-ed properly. Also, make sure that a supported 5V/4A power supplyis being used, and that it is plugged in properly. Depending on theperipherals attached, you may need a more powerful power supply,such as one rated at 5V/6A+. If the first power supply doesn’t work,try another supported model. If neither work, seek to RMA the XU4.Chapter 2
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