Philips 20PT643F Service Manual page 60

Service manual
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Software Alignments and Settings
The following options are performed in the Service Default Alignment Mode (SDAM).
SDAM is described in the 'Service Modes, Error Codes and Fault Finding' section.
The following alignments are explained:
1. OPTIONS
2. TUNER
3. WHITE TONE
4. GEOMETRY
5. AUDIO
Options
Options are used to control the presence or absence of certain features and hardware.
How to change an Option Byte
An Option Byte represents a number of different options. Changing these bytes directly
makes it possible to set all options very quickly. All options are controlled via seven
option bytes.
Note: Each option byte controls several features of the television set; therefore, before
changing option byte information, it is important to record the current option byte values.
This ensures that the television features can be restored to the original settings, if
necessary.
1. To enter SDAM, 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).

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