21KF-80 (serv.man5). Adjustment procedures - Sharp TV Service Manual (repair manual). Page 6

The following adjustments should only be carried out when the CRT or IC801 are replaced.

1. This adjustment must be done after warming up the unit for 30 minutes or longer with a beam current over 700 µA.

2. The red value «DRI-RS» should be fixed to 42. (Refer to “How to access service mode” section).

3. «DRI-GS» adjustment alters  “Y” coordinate.

4. «DRI-BS» adjustment alters  “X” and “Y” coordinates.

Adjustment method 1 (using the signal generator, varying the picture signal)

1.   Adjust G2.
2.   Input a white pattern with burst signal from SCART.
3.   Position the colorimeter in the centre of screen.
4.   Adjusting input signal level, select a luminance of 70 nits.
5.   Operate again in “service mode“ and select «DRI-GS» and/or  «DRI-BS» locations to obtain colour coordinates:

6.   Reset the TV with the mains switch button to store the adjustment and exit service mode.
7.   Check colour coordinates  “X” and “Y” at 20 a 120 Nits. It may be necessary to repeat the same procedure to
      obtain the above values.

Adjustment method 2 (using the signal generator, with a fixed picture signal)

1.   Adjust G2.
2.   Tune a white pattern with burst signal.
3.   Operate in “service mode”:
4.   Using  «SUB-CON», select a luminance of 70 nits.
5.   Operate again in “service mode“ and select «DRI-GS» and/or  «DRI-BS» locations to obtain colour coordinates:

6.   Select  «SUB-CON». Return data to “63”.
7.   Reset the TV with the mains switch button to store the adjustment and exit service mode.
8.   Check colour coordinates  “X” and “Y” at 20 a 120 Nits. It may be necessary to repeat the same procedure to
      obtain the above values.