8.3. A/D converter gain adjustment (480p . 1080i)
Preparation
PICTURE:VIVID (NORMAL SET)
ADJUSTMENT DATA: BRIGH, CONT
Note:
Set ABL operation to off in Contrast adjustment.
Measurement Instrument
Remarks
1.
Oscilloscope
2.
Alignment equipment
Extension cable kit (Part No.TZSC0704)
3.
Remote control
Picture menu: VIVID
Picture pattern: Studio color bar
Probe: The signal should be terminated by 75
W
, ±1% resistor.
Not use Cross hatch signal
Adjustment Procedures
1.
Apply the 10 stair-step (B/W) signal (480p or 480i) to HDMI input.
2.
Connect the Oscilloscope to CN3303-A38 (G out of DR-Board).
3.
Adjust ADC-G so that the B-W (Blanking portion-White) is 0.53V±0.02V.
4.
Also connect the oscilloscope to CN3303-A34 and observe both waveforms simultaneously.
5.
Adjust ADC-R so that the amplitude of R signal waveform is same as G signal.
6.
Connect the Oscilloscope to CN3303-A38 (G out) and CN3303-A36 (B out), and observe both waveforms simultaneously.
7.
Adjust ADC-B so that the amplitude of B signal is same as G signal.
8.
Apply 1080i 10 stair-step (B/W) signal to HDMI input.
9.
Perform same procedures (item 2-7) as 480p signal adjustment.
15
TU-PT700U
