Function explanation accessible by moving mouse on buttons
Karaoke
To get mixed music and vocal output. Under KARAOKE mode, CD or CD+G disc stops automatically at the end of each song.  PLAY button must be pressed again for next song.  KEY control is available only under such a mode.  The KEY will reset automatically at the end of each song. 2CH
Stereo Mode
It is recommended for enjoying high fidelity music. Music is only output from ML, MR, FL and FR on the rear panel. VIDEO
Select different video output types (S-VIDEO, YCbCr, SCRAT, YPbPr, VGA) to best match your TV for higher video quality. 
O/I: Press STOP button to make sure it is in stop mode. Press VIDEO button and then Press OK button successively to switch among different video output types. N/P
To switch TV types (MULTI SYSTEM, NTSC, PAL, 480P, 576P and 720P).
O/I: Press STOP button to make sure it is in stop mode. Press P/N button and then Press OK button successively to switch among different TV types. TIME
To display the current selected track and time information. 5.1
5.1 CH Channel Mode
To enjoy 5.1 channel surrounding sound movie. L/R
To select audio playback modes (mono left, mono right and STEREO) when Karaoke disc is being played. ZOOM
To zoom in and out the size of image on the screen. STEP
To forward each frame by pressing button.  Applicable for VCD and DVD only. REVERSE
To go backward through a track. EQ
To select the 7 preset modes and personal mode of equalizer. 
O/I: Press EQ then OK button to switch among modes.  Repress EQ to show spectrum. Repress EQ to exit. FORWARD
To go forward through a track. SOUND MODE
Select the type of sounds under the Karaoke Mode. 
O/I: Press SOUND MODE button to get one out of five sound effects. RETURN
To return to the menu during VCD disc playback when PBC on. SLOW
To slow down the playback while playing VCD and DVD disc.
O/I: Press SLOW button successively to get SF 2X, 4X, 8X and SR 2X, 4X, 8X and back to PLAY status. MUTE
To mute or silence the audio track during playback KEY CONTROL
To adjust total 14 steps key level of music in Karaoke mode. Auto reset after each song is finished.
Note: Only works under Karaoke Mode. VOL+
To adjust the volume of all music. VOL-
To adjust the volume of all music. OSD
To display the playback information. REPEAT
To repeat playing one track or all tracks. A-B 
To select a section you desire to play repeatedly.  It¡¯s applicable for VCD and DVD only.
O/I: Press A-B button to set A.  Press A-B button again to turn on repeat from A.  Third time press A-B button to cancel the function. CLEAR
To cancel the programmed tracks SEARCH
To switch DISC or USB playback in stop mode. Press ENTER to confirm. Or to search a disc by time, track or chapter. DIRECTION BUTTONS
To move up, down left and right in selection TITLE
To access the title menu of a DVD disc. PBC
To enter VCD disc menu. DIRECTION BUTTONS
To move up, down left and right in selection DIRECTION BUTTONS
To move up, down left and right in selection DIRECTION BUTTONS
To move up, down left and right in selection SUBTITLE
To select the subtitle options in DVD discs that have subtitle options. Angle
To switch between different video angles on a DVD disc that has multi-angle video. SETUP
To access the on-screen preference pages
O/I: It is recommended that pressing SETUP button after STOP playing. OK
To confirm operation Vocal Cancel 
This button combines VOCAL CANCEL (cancel guide vocal of multiplex media) and VOCAL PARTNER (weaken guide vocal of multiplex media when you sing to the microphone) functions. 
O/I: Press VOCAL CANCEL button successively to switch among VOCAL CANCEL RIGHT, VOCAL CANCEL LEFT, VOCAL PARTNER RIGHT, VOCAL PARTNER LEFT and NO VACAL. MENU
Take you to the menu when viewing a DVD AUDIO
To switch different audio outputs of DVD disc. NUMERIC BUTTONS
Direct numeric access buttons are applicable for tracks up to 2048. NUMERIC BUTTONS
Direct numeric access buttons are applicable for tracks up to 2048. EJECT
To open and close the tray door PLAY
To play disc playback. STOP
To stop disc playback. PAUSE
To pause disc playback. Previous 
To skip to the previous track. Next 
To skip to the next track. Program
To program playing order of tracks. Only work on CD+G and CD disc.
O/I:
1.Press STOP to stop playing.
2.Press PROGRAM to enter program screen.
3.Select the track to play by pressing numeric keys. The number of track shows on screen.
4.Press OK to confirm the selection. Programmed number of track is added automatically. Repeat step 3 and 4 for more tracks programming.
5.Press PLAY button to play tracks programmed. RANDOM
To choose randomly play order of songs VIEW
Intro-play each song on CDG or VCD disc.  
O/I: Press STOP button.  Press VIEW button and acquire a menu.  
For CDG, Press 1 to get intro-play function.  Press STOP to exit during intro-playing.  
For VCD, Press 1 button to get intro-play function.  Press 2 to get picture of each song in 9 windows.  Press 4 to exit.