44BHT-500B4.2 Updating the System4.2.1 Updating the BHT SystemThe BHT system update procedure is as follows.BHT System Update File DownloadBHT System Update BHT System Update File DownloadRefer to sections “4.5.2 Downloading Files (DOWNLOAD Menu)” and ”4.5.8 Downloading/Uploading Filesby FTP (FTP MENU)”, and download the BHT system update file to the BHT.- Note - The BHT system update file can be downloaded from the following Web site.http://www.qbdirect.net/ BHT System UpdateRefer to section “4.5.15 Updating the System (MODIFY MENU)” and update the BHT system.- Important - In order to prevent the battery running low during the system update process, perform thesystem update with the battery sufficiently charged, or with the BHT placed in the CU-500Series. If the BHT power turns OFF due to a low battery and so on during the system update,the system update will continue when the power is next turned ON. Furthermore, duringsystem update, the power will not turn OFF even if the Power key ( ) is pressed. Wait untilthe system update process is complete before operating the BHT.