Samsung SP403JHPX, Service Manual

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Alignment and Adjustments
Samsung Electronics 5-9
5-6-7 R Main Brightness & B Main Brightness
Adjustments
1. Input a 5-step signal (Color OFF).
2. Connect CH1 to LCD G1 input and CH2 to
LCD R,B input. (1 V/div, 10 u sec/div)
3. Reverse the CH2 signal, and add CH1 and
CH2 in ADD mode.
4. Adjust R,B main brightness for the waveform
shown below.
Note: The R,B main brightness adjustment should
be done with Gamma
Adjustment OFF (gamma ctrl1 = 63, gamma
ctrl2 = 17).
5-6-8 R Sub-brightness & R Contrast
Adjustments
1. Input a 5-step signal (Color OFF).
2. Connect CH1 to LCD G1 input and CH2 to
LCD R1 input. (1 V/div, 10 u sec/div)
3. Reverse the CH2 signal, and add CH1 and
CH2 in ADD mode.
4. Adjust R sub-contrast and R sub-brightness
waveforms, as shown below:
5-6-9 B Sub-brightness & B Contrast
Adjustments
1. Input a 5-step signal (Color OFF).
2. Connect CH1 to LCD G1 input and CH2 to
LCD B1 input. (1 V/div, 10 u sec/div)
3. Reverse the CH2 signal, and add CH1 and
CH2 in ADD mode.
4. Adjust B sub-contrast and B sub-brightness
waveforms, as shown below:
5-6-10 Gamma Adjustment
1. Input a 5-step signal (Color OFF).
2. Connect LCD G1 input to an oscilloscope.
(2 V/div, 10 u sec/div)
3. Adjust the gamma gain1, gain2 and the
gamma ctrl1, crtl2 for the waveform shown
below.
Brightness Adjustment
Brightness Adjustment
Contrast Adjustment
Brightness Adjustment
Contrast Adjustment