Sub-Bright Adjustment (Brigh) And Abl Check - Panasonic PT-53X54J Service Manual

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17.9 Sub-Bright adjustment (BRIGH) and ABL check

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This adjustment is intended to set 7.5 IRE signal to black level mode.
Procedure:
1. Set PICTURE MODE TO VIVID, PICTURE settings to normal, NATURAL COLOR to OFF and COLOR
TEMPERATURE to NORMAL.
2. Connect meter (positive lead) to D31 pin 2 and (negative lead) to D31 pin 1.
3. Apply a color bar with no color or if available a grey levels pattern (see picture).
4. Adjust DAC BRIGH data so that bar 1 becomes near black like bar 0.
5. Apply an HD 1080i signal and repeat this adjustment for HD 1080i mode.
6. To check ABL apply a white pattern and put user bright control (BRIGHTNESS in Picture menu) control to max. and
confirm that reading on meter is 12.7 ± 0.8V.
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http://tsn.pstc.panasonic.com/viewing/NA/PT-53X54J/SVC/s1709000000.html [23/04/2012 12:16:29 p.m.]
Gray bar pattern.