HOW TO ENTER THE SERVICE MODE TO PANASONIC / NATIONAL TVs [EURO-1 CHASSIS]

Before entering the service mode adjustments, and to get into the service mode option, first enter into the Sound-Menu - Low-Tone-regel to MAX, adn Hi-tone - regel to MIN.  Press [Volume --ve] on the front panel of the TV, and "Reset" button on the remote control to enter the service mode.

* To select an item, use "Red' and "Green" buttons on the remote control.
** To adjust the value of the selected item, use "Yellow" and "Blue" buttons on the remote control.
*** To store the adjusted data into memory, press "STR".
**** To exit from the service menu, switch OFF the set by its Power ON/OFF switch at its front panel.