Vertical Linearity Adjustment (V-C And V-S) - Panasonic PT-53X54J Service Manual

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17.5 Vertical linearity adjustment (V-C and V-S)

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This adjustment is intended to make the picture vertically proportional (top, center and bottom)
NOTE:
1080i, 480p, 480i pattern can be obtained from Panasonics TU-DST51 set-top box DTV decoder.
1. Apply a pattern that lets adjust the image to correct vertical linearity (see above note).
2. Set VIDEO C_OFF DAC from 00 to 01 (to project only green).
3. Set DAC MUTE from 00 to 01 (disabling digital convergence).
4. Adjust centering magnets so that the center of the pattern get aligned with screen frame center.
5. Adjust VDEF V-C and V-S DAC until vertical size is proportional on top and bottom. Confirm to correct linearity in
the middle of the screen.
6. Set DAC MUTE from 01 to 00 (disabling digital convergence).
7. Set VIDEO C_OFF DAC from 01 to 00.
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http://tsn.pstc.panasonic.com/viewing/NA/PT-53X54J/SVC/s1705000000.html [23/04/2012 12:16:27 p.m.]