From hifi-remote.com, for a Venturer LCD19-106 LCD TV:
0 16
1 17
2 18
3 19
4 20
5 21
6 22
7 23
8 24
9 25
AV In 90
Channel Down 1 Menu Down
Channel Up 0 Menu Up
Display 58 Text Index
Exit 91 Text Cancel
Fastext Blue 36
Fastext Green 34
Fastext Red 33
Fastext Yellow 35
Format 76 Text Size
Function 37
I/II 64
Last Channel 26 Text Reveal
Menu 4
Mute 9
Picture 40
Sleep 75 Text Hold
Sound 6
Standby/On 8
Subtitle 38
Time 39 Text Mix
TV/Text 72
Volume Down 3 Menu Left
Volume Up 2 Menu Right
YUV In 80
This seems to imply that if you have the menu displayed then the Vol and Ch buttons are the arrow butons.