Alpine HDS-990 HDS-990 Owners Manual - Page 31

When Something goes Wrong  If there is no valid playing file or empty folder in the folder, the folder number/folder name will not be displayed. The term Bit rate This is the "sound" compression ratio specified for encoding. The higher the bit rate, the better the sound quality, but the larger the file size. Sampling frequency This value indicates the number of times the data is sampled (recorded) per second. For example, a music CD uses a sampling frequency of 44.1kHz, so the sound is sampled (recorded) 44,100 times per second. The higher the sampling frequency, the better the sound quality, but the larger the amount of data. coding Convert music CDs, WAVE (AIFF) files and other sound files into the specified audio compression format. mark Write song information of MP3/WMA/AAC/M4A/WAV/FLAC/APE/DSD files, such as song, album, file format, artist, date, file size. Root folder The root folder (or root directory) can be found at the top of the file system. The root folder includes all folders and files. If you encounter problems, turn off the power, and then turn it on again. If the machine still does not work normally, please check the items in the table below. If the machine fails, this manual will help you solve the problem. Otherwise, please make sure your system is connected correctly or consult your Alpine authorized dealer. common problem The function cannot be used or there is no screen display.  =The ignition switch of the car is off. - If you connect as instructed, the machine will not operate with the car's ignition switch turned off.  The power cord (red) and the battery cord (yellow) are not connected correctly. - Check the connection of the power cord and battery cord.  The fuse is burned out. - Check the fuse of the machine, if necessary, replace the fuse with a suitable specification.  The internal microcomputer malfunctions due to interference noise, etc. - Use a ballpoint pen or other pointed object to press the RESET switch. MP3/WMA/ACC/M4A/WAV/FLAC/APE/DSD Cannot play MP3/WMA/ACC/M4A/WAV/FLAC/ APE/DSD。  A write error occurred. MP3/WMA/ACC/M4A/WAV/FLAC/APE/DSD format is not compatible. - Make sure that MP3/WMA/ACC/M4A/WAV/FLAC/APE/DSD is written in a supported format. Refer to "About MP3/WMA/ACC/M4A/WAV/FLAC/APE/DSD", and then rewrite in a format supported by this unit. Audio 28 EN