Panasonic TC-29P10N Service Manual page 25

Focus adjustment
1. Focus adjustment
Adjustment jig Color pattern generator
Measuring location TV screen (visual observation)
Input signal Crosshatch pattern
1 2 3 4 5 6 7 8 7 6 5 4 3 2 1
1
2
3
4
5
6
5
4
3
2
1
Adjustment after board exchange
Adjustment after [DF] DAF board exchange
1. DAF Phase Adjustment
Adjustment jig Color pattern generator
Measuring location TV screen (visual observation)
Adjustment location DAF board [DF], R1577
Input signal Crosshatch pattern
1 2 3 4 5 6 7 8 7 6 5 4 3 2 1
1
2
3
4
5
6
5
4
3
2
1
Adjustment conditions
Image adjustment
Set GR to "ON". (Refer to page 10 in the Service Manual.)
1. Receive a crosshatch pattern.
2. Adjust Focus 1 so that the thickness of the vertical line
figure on the left becomes a minimum.
3. Adjust Focus 2 so that the horizontal line thickness at the intersection
of the vertical line
4. Confirm that the focus at the center and at the outer circumference is
balanced. In case of bad balance, repeat the adjustments 2. and 3..
Adjust with Focus 2 to a minimum.
Adjust with Focus 1 to a minimum.
1. Receive a crosshatch pattern
2. Use Focus 2 to adjust the center to underfocussed condition.
3. Adjust R1577 on the DAF board [DF] so that the left-right balance of
the intersection of the horizontal line
becomes equal.
4. Perform focus adjustment.
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Black level "0" Center
Picture "+30" Maximum
and the horizontal line becomes a minimum.
and the vertical lines
in the