Sharp LC-20SD5E Service Manual page 26

2-2: CONTRAST
1. Place the set in Aging Test for more than 15 minutes.
2. Receive the color bar pattern. (RF Input)
3. Using the remote control, set the brightness and
contrast to normal position.
4. Press the LEFT/RIGTH button on the remote control
until the contrast step No. becomes "43"
5. Check if the picture is normal.
6. Receive the color bar pattern. (VIDEO1 Input)
7. Using the remote control, set the brightness and
contrast to normal position.
8. Press the button on the remote control to set to
the EXT1 mode.
9. Press the LEFT/RIGTH button on the remote control
until the contrast step No. becomes "43".
10. Check if the picture is normal.
11. Receive the color bar pattern. (VIDEO2 Input)
12. Using the remote control, set the brightness and
contrast to normal position.
13. Press the button on the remote control to set to
the EXT2 mode.
14. Press the LEFT/RIGTH button on the remote control
until the contrast step No. becomes "43".
15. Receive the color bar pattern. (VIDEO3 Input)
16. Using the remote control, set the brightness and
contrast to normal position.
17. Press the button on the remote control to set to
the EXT3 mode.
18. Press the LEFT/RIGTH button on the remote control
until the contrast step No. becomes "43".
19. Receive the color bar pattern. (AV RGB Input)
20. Using the remote control, set the brightness and
contrast to normal position.
21. Press the button on the remote control to set to
the EXT1 mode.
22. Press the LEFT/RIGTH button on the remote control
until the contrast step No. becomes "43".
23. Receive the color bar pattern. (S-VIDEO Input)
24. Using the remote control, set the brightness and
contrast to normal position.
25. Press the button on the remote control to set to
the EXT2 mode.
26. Press the LEFT/RIGTH button on the remote control
until the contrast step No. becomes "41".
27. Check if the picture is normal.
28. Receive the color bar pattern. (S-VIDEO Input)
29. Using the remote control, set the brightness and
contrast to normal position.
30. Press the button on the remote control to set to
the EXT3 mode.
31. Press the LEFT/RIGTH button on the remote control
until the contrast step No. becomes "43".
32. Check if the picture is normal.
ELECTRICAL ADJUSTMENTS
D-2