replaced audio system now volume control doesn't work

If a DVD changer is installed, the “Mark Levinson”, “Gracenote”, and “DOLBY” logos are shown on the panel. 1 “AUDIO” button Push this button to display the audio control screen. For details, see page 181, 203, 206, 217, 229, and 238. 2 Function button display screen Touch the buttons displayed on the screen to control the radio, CD changer, DVD changer or sound li- brary. For details, see page 182. 3 button Push this button to stop and eject the disc. For details, see page 200 and 214. 4 Disc slot Insert discs into the slot after pushing “LOAD” button. For details, see pages 198 and 212. 5 “LOAD” button Push this button to insert the disc. For details, see pages 198 and 212. 6 “TUNE/FILE” knob Turn this knob to move up or down the station band, file or track. For details, see pages 187, 193, 208 and 240. 7 “CH/DISC” button Push “ ” or “ ” button to select a program type, a selected disc or an album/artist/genre. For details, see pages 188, 200, 202, 214, 216 and 239. 8 “SCAN” button Push this button to scan radio sta- tions or scan the tracks,discs, files or folders. For details, see pages 188, 195, 204, 209, 210 and 241. 178 AUDIO/VIDEO SYSTEM LS460_Navi_U (L/O 0609) 2007 LS460L/LS460 Navigation from Aug. '06 Prod. (OM50750U)