Panasonic PT-56WX53G, Service Manual

Page: 122 / 194

sides (see above note).
2. Repeat NTSC pincushion adjustment from step 2
17.14. NTSC Horizontal size adjustment (H WID)
This adjustment is intended to adjust horizontal size of the picture for NTSC mode.
NOTE:
1080i, 480p, 480i pattern can be obtained from Panasonic’s TU-DST51 set-top box DTV decoder.
1. Apply a NTSC pattern that lets adjust the horizontal size.
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. In service mode, adjust “H WID” DAC until the picture horizontal size
is balanced at left and right side of screen.
5. Set DAC “MUTE” from 01 to 00 (disabling digital convergence).
6. Set VIDEO “C_OFF” DAC from 01 to 00.
17.15. HD 1080i Horizontal size adjustment / (H WID)
This adjustment is intended to adjust horizontal size of the picture.
NOTE:
1080i, 480p, 480i pattern can be obtained from Panasonic’s TU-DST51 set-top box DTV decoder
1. Apply a HD 1080i pattern that lets adjust the horizontal size.
2. Repeat NTSC horizontal size adjustment from / step 2.
17.16. NTSC and HD 1080i Sub-Bright adjustment (BRIGH) and ABL check
This adjustment is intended to set 7 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 NTSC color bar with no color or if available a grey levels
pattern.
4. Adjust DAC “BRIGH” data so that bar near to black bar becomes near
black
5. Apply an HD 1080i signal and repeat this adjustment for HD 1080i mode
50