How to lock / unlock a channel in Philips TV?

Make sure remote control is in TV mode by pressing 'SELECT' button repeated until 'TV' lights up green:

1. Press the 'MENU' button
2. Press the cursor right
3. Press cursor down to select CHANNELS
4. Press cursor right
5. Press cursor down to select CHANNEL LOCK. Press the cursor right. Enter the PIN code using numeric keys (0-9).
6. If the PIN code is correct, the channel list reappears
7. Select the channel with the cursor up/down and press the 'OK' button to lock or unlock
8. Locked channels are indicated with a crossed box-graphic, unlocked channels with an empty box-graphic
9. To switch between lock and unlock press the 'OK' button
10. To lock or unlock other channels, select each channel with cursor up/down then press the 'OK' button
11. You will only have to enter the PIN code once while the menu is active
12. Press 'MENU' button on the remote control to exit the menu
13. Each time you select a locked channel, the screen is gray and you are prompted to enter the PIN code