14.3 DAF adjustment
(Dynamic focus adjustment)

TOP PREVIOUS NEXT

The purpose of this adjustment is to move the focus in the picture, so the focus is in balance in the whole picture (same level). Perform this adjustment as a visual adjustment, centering both waveforms, repeat adjustment until best adjustment isobtained.

PREPARATION

1. Picture settings normalized.

2. Picture mode set to VIVID.

PREPARATION

1. Apply a crosshatch pattern.

2. Connect channel one of the oscilloscope with 100x1 probe to DAF OUT on J172 (D-Board).

3. Connect channel two of the oscilloscope with 10x1 probe to KG (L-Board).

4. If the the points A and B are different adjust, in service mode, adjust (HDAFS) DATA so that become the same position.

5. Apply a 1080i crosshatch pattern and repeat from step 1 to step 4.

   NOTE

   Both waveforms should be centered. Upper waveform could be different depending on the pattern applied

   DAF adjustment

   

Other method (DAF adjustment)

PREPARATION

1. Picture settings normalized.

2. Picture mode set to VIVID.

PROCEDURE

1. Apply a crosshatch pattern.

2. Put a mark in the focus control (on fly-back), so the control can be put back in the original position.

3. Turn the focus control (fly-back) fully, so the image is out focus.

4. Then in service mode adjust (HDAFS) DATA, so the focus is moving from side to side in the picture.

5. Adjust (HDAFS) DATA so the picture looks in balance in left and right.

6. Turn focus (fly-back) control back to its original position.

7. Apply a 1080i crosshatch pattern and repeat from step 1 to step 6.

   NOTE

   Repeat adjustment until best adjustment is obtained. For best adjustment, use oscilloscope as described in previous adjustment method.

TOP PREVIOUS NEXT