LS423 Theory of Operation

this section describes how specific components operate on the ls423 on board leds the ls423 has a single red led to indicate that the power is on the led will flash during the firmware update process it will also flash a certain number of times to indicate an error state the flash codes are described below true 298,299left unhandled content type left unhandled content type left unhandled content type left unhandled content type left unhandled content type left unhandled content type left unhandled content type left unhandled content type left unhandled content type left unhandled content type left unhandled content type left unhandled content type left unhandled content type left unhandled content type left unhandled content type left unhandled content type left unhandled content type left unhandled content type left unhandled content type left unhandled content type left unhandled content type left unhandled content type left unhandled content type left unhandled content type left unhandled content type left unhandled content type left unhandled content type left unhandled content type on board switch the on board switch is connected to a gpio12 pin that is pulled low when the service (svc) button is pressed conversely, a pull up on the button normally sets the gpio12 pin 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 4 seconds will cause a hard reset microsd slot the ls423 has one microsd slot, which supports transfer modes up to uhs 1 ddr50 (50mb/s) there is no inherent limit on the storage capacity of microsd cards used with the player wireless module the ls423 has an internal m 2 slot for installing a compatible wireless module the m 2 wireless module connects via cable to an external, attachable wireless antenna