Philips DPTV305, User Manual

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Gray Scale Alignment
1. Place the input to the RGB (Aux 5) or Y Pb Pr (Aux 4) mode. Connect a Computer or Computer monitor
generator to the Aux 5 input or a Component Generator to Aux 4.
2. Preset the G2 controls counterclockwise.
3. Turn the Green G2 clockwise to make the menu visible.
4. Enter the SAM mode by entering 0, 6, 2, 5, 9, 6, Index on the Remote Control. Select the GDE mode and
select WHITE TONE.
5. Preset the following registers: Use the Cursor Right-Left buttons to set the value. Use the Cursor Up-Down
buttons to select the register. Press the Menu button to return to exit the WHITE TONE menu.
Name Value
Red Cutoff 3F
Green Cutoff 3F
Blue Cutoff 3F
Red Drive 3F
Green Drive 3F
Blue Drive 3F
6. Set the Brightness, Picture, and Sharpness to their midpoint position. Select a Black Raster pattern on the
computer or computer monitor generator.
7. Place a Scope set to measure DC on each cathode to determine the dominant (lowest) color.
8. Adjust the SUB BRIGHTNESS control to set the Black Level equal to 180 volts on the scope.
9. Move the probe to the remaining cathodes and adjust the corresponding cutoff registers to make the black
part of the waveform at 180 volts.
10. Set the corresponding G2 control to just make cutoff for the black part of the waveform for that tube.
11. Remove the Scope.
12. Apply a Grayscale pattern to the set.
13. Adjust the Drive Controls to achieve the proper white balance. At least one drive should remain 3F.
14. The following Drives and Cutoffs should be set as listed. These are in the WHITE TONE menu.
Cool Cutoff Red
0
Cool Cutoff Green 0
Cool Cutoff Blue 0
Cool Drive Red -7
Cool Drive Green -6
Cool Drive Blue 0
Warm Cutoff Red 0
Warm Cutoff Green 0
Warm Cutoff Blue
0
Warm Drive Red +7
Warm Drive Green +4
Warm Drive Blue
-6
15. Press the Menu button to return to the SAM menu. Exit the Service mode by turning the set Off.
See GDE SAM MODE DEFAULTS TABLE