XD6 Theory of Operation

this section describes how specific components operate on the xd236 and xd1036 on board leds the four on board leds have the following indicators led indication green power ( pwr ) displays when the board is powered up and not in reset mode flashes during firmware update process green file system activity ( bsy ) flashes any time there is file system activity (on any storage device) blue ( wifi ) illuminates when wifi is connected and flashes when searching for a connection red status ( err ) flashes a certain number of times to indicate which error is occurring the flash codes are described below 2 unspecified error 3 network recovery script is preparing to run on a device configured for network recovery 4 no upgrade file found 5 failed to load kernel module 6 board is not capable of running the current firmware version 7 a piece of on board hardware is not working correctly 8 problem related to the storage device (either the usb drive or microsd card) 9 problem related to the registry/nand 10 the autorun script encountered a load/run error 11 wifi related error 12 unable to find bootable image on board switch / svc button the service (svc) button provides a dedicated gpio button (gpio12) for the os pressing the svc button pulls the pin low conversely, releasing the button pulls the pin high reset switch / gpio button the reset button is connected to the reset circuit pressing the reset button will send an initial signal to the system software and holding the reset button low for approximately 4 seconds will cause a hard reset microsd slot the xd236 and xd1036 each have an external microsd slot, which supports independent speeds of up to hs200 there is no inherent limit on the storage capacity of microsd cards used with the player these players also have an internal microsd card wireless module the xd236 and xd1036 have a dual antenna connection which allows users to install a brightsign wireless module brightsign modules are configured to work with 802 11 n or 802 11 ac access points the wireless module also offers bluetooth functionality cellular modem the xd236/xd1036 are fitted with a b key m 2 connector which supports 4230 form factor m 2 cards for cellular modem (usb interface) connectivity the recommended card is the quectel em05 g iot/m2m optimized lte cat 4 module the external sma connectors can be used to mount two 4g/5g antennas appropriate for the region of intended use two internal cables with appropriate connectors will need to be sourced to connect the card to the antennas a nano size sim card socket is located on the pcb assembly note that cellular modem cards with components on the rear will not fit