service mode on Panasonic tx-32pk25

[I v E k Y]

It has Euro4H chasis, and somwhere on net I found that servicemode on that
chasis should be entered by:

bass to maximum
treble to minimum
press index on remote and -v on tv simultaneosly

but that doesn't do anything...
then trying other buttons i discovered that using next sequence:

bass to maximum
treble to minimum
press display on remote and -v on tv simultaneosly

i can start self-checking procedure (http://iveky.averi.hr/tv/all.jpg)

does anyone know how to enter service mode for this panasonic?