Philips FM24 Service Manual page 85

8. Alignments
Index of this chapter:
1. General Alignment Conditions
2. Hardware Alignments
3. Software Alignments and Settings
Note: The Service Default Mode (SDM) and Service Alignment
Mode (SAM) are described in chapter 5. Menu navigation is
done with the 'CURSOR UP, DOWN, LEFT or RIGHT' keys of
the remote control transmitter.
8.1 General Alignment Conditions
Perform all electrical adjustments under the following
conditions:
• Mains voltage and frequency: 220 V
otherwise stated.
• Connect the set to the Mains via an isolation transformer.
• Allow the set to warm up for approximately 20 minutes.
• Measure the voltages and waveforms in relation to chassis
ground (with the exception of the voltages on the primary
side of the power supply). Never use the cooling fins/plates
as ground.
• Test probe: Ri > 10 MΩ, Ci < 2.5 pF.
• Use an isolated trimmer/screwdriver to perform the
alignments.
Use a VGA-generator or a Personal Computer (contact your
National Service Organisation for the necessary test pattern
files) as test pattern generator and connect it to the VGA1 input
of the FM24 plasma monitor. When you use a PC, start
Microsoft PowerPoint (or Paintbrush), and load the mentioned
file. Then display the picture as full screen.
8.2 Hardware Alignments
There are no hardware alignments necessary. The VS/VA
alignments are set in the factory and do not need additional
adjustment.
8.3 Software Alignments
Enter the Service Alignment Mode (see chapter 5). The SAM
menu will now appear on the screen.
Select one of the following alignment menus via the upper
horizontal bar:
1. General (Gen.)
2. Display (Disp.)
3. Scaler (Scal.)
4. Video 1 (Vid.1)
5. Video 2 (Vid.2)
6. Options (Opt.)
Note: the last three items are not available in the Basic
configuration.
8.3.1
/ 50 Hz unless
AC
8.3.2
Alignments FM24
General
Table 8-1 SAM Menu 'Gen.'
Service Alignment Menu General
Type nr. - AG Code 32FD9944/01S (example)
SW version OTC AAAABC-X.Y xxxxx
SW version PW AAAABC-X.Y xxxxx
SW version EPLD AAAABC-X.Y xxxxx
Errors 1 xx xx xx xx xx
Errors 2 xx xx xx xx xx
Operational hours xx
Reset error buffer Press OK to reset
Store Press OK to store
Store
Select this item, and press OK, to store the made alignments.
Note: There are several methods to exit the SAM, each with its
own characteristics:
• Switch the set 'off' (with the Mains switch or by pulling the
Mains cord); new alignment settings are always stored,
even when item 'store' was not activated!
• Switch the set to 'standby' by pressing the power button on
the remote control transmitter; new alignment settings are
always stored, even when item 'store' was not activated!
• Use a standard RC-transmitter and key in the code 0 0;
new alignment settings are not stored (except when item
'store' was activated)!
Display
Table 8-2 SAM Menu 'Disp.'
Service Alignment Menu Display
Test pattern On / Off
Contrast Adjust ...
Gamma Adjust ...
White point Adjust ...
Compensation fact. 0 <-------|-------> 255
Test pattern
Possible to generate an 'even white' test pattern, which is
generated by the PDP. You can use this picture, to check the
plasma display for pixel defects.
Contrast
Not necessary to align, fixed value is 255.
Gamma
Not necessary to align, fixed value is 2.
White point
Not necessary to align, unless stated by the NSO. Fixed value
is 255.
Compensation factor
Not necessary to change. Fixed value is 128. In some cases
however, a new software table must be loaded in the PW
Scaler (via ComPair). The following service scenarios are
possible:
• When a defective glass filter plate is replaced:
This requires a new 'White Point' adjustment (see next
paragraph).
8. EN 85
128