How to enter service mode to Schneider TV18.1, TV18.2, TV18.3, TV18.4, TV18.8 – Power supply, audio output Horizontal and vertical scan and system control chroma schematic, Universal remote control setup code list
To enter service mode, press Info, i<<, Mute, Red Key, and Exit keys consecutively on the remote control, while TV is running.
Red key > one line down
Blue key > one line up
UP key > select the next menu table
DN key > select the previous menu table
OK key > save the changes
Exit key > exit the service mode
Prior to initialization it is helpful to write the service mode parameter values into the alignment table.  After initialization all service mode settings have to be checked and readjusted if necessary.