HD6 Theory of Operation
This section describes how specific components operate on the HD226 and HD1026.
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/Cell modem 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 on-board switch is connected to the GPIO02, which is pulled low when the service (SVC) button is pressed. Conversely, a pull-up on the button normally sets the GPIO02 to be pulled high.
Reset Switch / GPIO Button
The on-board switch is connected to the reset circuit. Pressing down the reset button will send an initial signal to the system software and holding the reset button low for approximately 6 seconds will cause a hard reset.
microSD Slot
The HD226 and HD1026 have two SD ports, one external and one internal. The internal SD card reader will support speeds up to SDR104, while the external SD card reader will support speeds upto DDR50. There is no inherent limit on the storage capacity of microSD cards used with the player.
Wireless Module/M.2 Connector
HD6 players 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.