Hello,
I found the following functional codes for the HD1E, a european TV with HDD:

01/001-Number 1
01/002-Number 2
01/003-Number 3
01/004-Number 4
01/005-Number 5
01/006-Number 6
01/007-Number 7
01/008-Number 8
01/009-Number 9
01/010-Number 0
01/017-Channel Up
01/018-Channel Down
01/019-Input (Ext. sources)
01/020-Volume Up
01/021-Volume Down
01/022-Power toggle
01/023-Audio Mute
01/032-Cursor Down
01/039-Prev Channel
01/051-Teletext Hold
01/052-Teletext
01/055-Teletext-TBF
01/056-Teletext Reveal
01/072-Red
01/073-Green
01/074-Yellow
01/075-Blue
01/082-Enter OK
01/087-Cursor Up
01/215-Cursor Left
01/216-Cursor Right
01/228-Back
01/245-Exit
17/057-HDD Play
17/058-HDD Stop
17/059-HDD Rewind
17/060-HDD FWD
17/061-HDD REC
17/062-HDD Pause
17/163-EPG Menu
17/164-Radio
17/198-Menu
17/200-Wide
17/208-PIP
17/211-Freeze
30/129-Ext7
30/159-Teletext Subtitle
30/160-Info
30/205-Teletext Subpage

List is in short form but Ihope with some use.