16.5 (NTSC) Color output adjustment
Service DAC adjustment (COLOR, TINT)

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NOTE

if a rainbow pattern generator is available perform the following procedure; the next section describes the procedure with no rainbow pattern.

Make sure that sub-contrast adjustment was finished prior to perform this adjustment

PREPARATION

  1. Normalize the picture settings.

  2. Set picture mode to VIVID

  3. Switch NATURAL COLOR to OFF.

PROCEDURE

  1. Apply a rainbow color bar pattern.

  2. In service mode adjust “R DR” and “B DR” data to “80”.

  3. Connect the oscilloscope to TP47B.

  4. In service mode adjust “TINT” data so that the peak white is located at same level as peak “3”, within 0±0.03V. (See waveform detail)

  5. Connect the oscilloscope to TP47R.

  6. In service mode adjust “COLOR” data so that the amplitude “a” is 1.0±0.03V.

  7. Connect the oscilloscope to TP47B.

  8. In service mode adjust “B-Y G” data so that the amplitude “b” is 1.2±0.03V (between 3rd and 6th peaks).

  9. With oscilloscope still connected to TP47B, adjust “TINT” data so that the peak “9” is located at same level as peak “3”, within 0±0.03V, then increase “TINT” databy 9 steps.

  10. Connect oscilloscope to TP47G.

  11. In service mode adjust “COLOR” data so that the amplitude “C” is 0.92±0.02V.

  12. Apply a studio color bar pattern and confirm that saturation and phase are normal (normal image).


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