
6. To check ABL apply a white pattern and put user bright control to
max. and confirm that reading on meter is 12.4 ± 0.8_V.
17.17. Red, green& blue screen Cut-Off
1. Use either a no input signal condition or raster from the NTSC
generator.
2. Observing the green tube directly or via a reflective surface, adjust the
VR on focus pack for the green tube for minimum noise.
3. Adjust the noise level in the red and blue tubes to match the noise
level in the green tube.
17.18. White balance adjustment
NOTE:
1080i, 480p, 480I pattern can be obtained from Panasonic’s TU-DST51 set-top box DTV decoder.
Prior to this adjustment, perform sub-contrast adjustment. This adjustment requires that the service
use skills in observing what a screen without color should look like (white picture).
Preparation:
1. Set the following in the user picture menu as follows:
- PIC MODE to VIVID
- COLOR to center (31)
- PICTURE to max (63)
- BRIGHT to center (31)
- SHARPNESS to min. (0)
- TINT to center (31)
- NATURAL COLOR to OFF
- COLOR TEMPERATURE to COOL
1. Enter the service mode.
2. Apply a NTSC black and white pattern to one of the video inputs (see
above note) color bar with no color.
17.18.1. High light white balance adjustment
1. Adjust DAC R_DR for red and B_DR for blue adjustments.
2. Make sure the screen is not blue or green. The screen should be white
51
Summary of Contents for PT-56WX53G
Page 82: ...5 PTV Location of controls 10 ...
Page 93: ...A BOARD 21 ...
Page 94: ...D BOARD 22 ...
Page 95: ...R BOARD VIEW DC BOARD TOP VIEW 23 ...
Page 96: ...DC BOARD BOTTOM VIEW DV BOARD 24 ...
Page 97: ...DG BOARD TOP VIEW DG BOARD BOTTOM VIEW 25 ...
Page 147: ...19 5 Instructional flow for service mode 75 ...
Page 148: ...76 ...
Page 149: ...20 Reference of PDF links color 21 Conductor views 77 ...
Page 151: ...22 2 Video block diagram 23 Schematic diagrams 23 1 Schematic diagrams notes 79 ...
Page 152: ...80 ...
Page 153: ...23 2 Notas de los diagramas esquematicos 81 ...
Page 154: ...82 ...
Page 159: ...87 ...
Page 162: ...90 ...
Page 164: ...92 ...
Page 166: ...94 ...
Page 168: ...96 ...
Page 170: ...98 ...
Page 176: ...Q 104 ...
Page 178: ...Q 106 ...
Page 184: ...112 ...
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