Alpine HDS-990 HDS-990 Owners Manual - Page 6

Installation location  This machine cannot be installed in any of the following places:  Near direct sunlight and heat sources  Places with high humidity and near water sources  Dusty places  Locations subject to severe vibration Protect the USB connector  The machine provides three front and rear USB ports to support the connection and use of USB storage. When the front and rear ports are connected to the charging device at the same time, the normal operation of the machine cannot be guaranteed.  Only USB storage can be connected to the USB terminal of this unit. The use of other USB products cannot guarantee normal use.  If you use a USB connector, be sure to use the USB extension cable (included).  Depending on the connected USB memory device, this unit may not work or some functions may not be performed.  The file system supported by this machine is FAT16/32, NTFS, exFAT.  Please make sure that the number of songs in the connected USB storage (the maximum number of songs that can be played in the front and rear USB) does not exceed 10,000, otherwise it will not play normally.  The audio file format that this machine c an play is MP3/WMA/AAC/M4A/WAV/FLAC/A PE/DSD.  It can display performer's name/song name/song album, etc. Some special characters may not be displayed correctly. Notice Alpine is not responsible for lost data, etc., even if it occurs while using this product. About using USB storage  In order to prevent malfunction or damage, please pay attention to the following points.  Please read the user manual of the USB memory thoroughly.  Do not touch the terminals with your hands or metal.  Do not subject the USB memory to severe vibrations.  Do not bend, drop, disassemble, modify, or immerse in water.  Avoid using or storing in the following situations.  In a car exposed to direct sunlight or high temperature.  There may be places with high humidity or corrosive objects.  Install the USB memory in a location where it will not hinder the driver's operation.  USB storage may not work properly in high or low temperature places.  Only use approved USB memory. Please note that even if it is an approved USB memory, it may not work properly depending on its type or status.  The function of the USB memory cannot be guaranteed. Please use USB storage in accordance with the terms of the agreement.  Depending on the USB memory type, memory status or encoding software settings, this unit may not be able to play or display correctly.  Files that are copy-protected (copyright protection) cannot be played.  The USB memory may take some time to start playing. If there are special files other than audio in the USB storage, it may take longer before the file is played or searched for.  This unit can play files with "mp3", "wma", "acc", "m4a", "wav", "flac", "ape", "dsd" ("dff" and "dsf") extensions.  Do not add the above extensions to non-audio data. Such non-audio data cannot be recognized. The playback result may contain noise that can damage speakers and/or amplifiers.  It is recommended to back up important data on a personal computer.  Do not remove the USB device during playback. Change SOURCE to something other than USB, and then remove the USB device to prevent damage to its memory. 3 EN