Philips 20PT643F Service Manual page 38

All service-unfriendly modes (if present) are disabled. The service unfriendly
modes are:
Timer / Sleep timer.
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Child / parental lock.
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Blue mute.
§
Auto shut off (when no 'IDENT' video signal is received for 15 minutes).
§
Skipping of non-favorite presets / channels.
§
Auto-storage of personal presets.
§
Auto user menu time-out.
§
Auto Volume Leveling (AVL).
§
Run timer (maximum four digits displayed)
Software version
Option settings
Error buffer reading
How to enter
To enter SDM, you must use a Philips ITV commercial setup transmitter (such as the
RC2573GR or the RG4172BK). Use the following method to enter SDM:
First, place the setup remote in setup mode. To place the the RG4172BK in
setup mode, press TV SETUP; to place the the RC2573GR in setup mode, set
the switch to the TV SETUP position. Then press the following key sequence on
the remote control transmitter: '0 6 2 5 9 6' directly followed by the 'MENU' button
(do not allow the display to time out between entries while keying the sequence).
After entering SDM, a special menu screen is visible, with SDM in the upper right corner
of the screen to indicate that the television is in Service Default Mode.