Turn on the television and PRESS 1 key to select 1 channel.
Press menu button, Increase the bass to maximum,
Decrease treble to minimum
Press RESET on the remote control and while in the TV-volume.
Using the Teletext press RED and GREEN selects the item with Blue and Yellow line values. To store the new press STORE. To exit NORM (normalization).
Photo credit : fubidesign.com