Daewoo DSC-34W70N, Service Manual

Page: 11 / 59

6. General Adjustment
- 10 -
In the majority of cases, a high definition digital television will need basic adjustments such as high voltage, screen
voltage, focus, white balance, sub brightness, and geometry. All adjustments should be performed after heat-running the
set for at least 20 minutes.
1. Press the S1 button on the service remote control, and then full white pattern will appear on the screen.
2. Press the S1 button twice, and then the pattern will disappear.
High Voltage Adjustment
1. Operate the set for at least 20 minutes.
2. Connect the probe of high voltage meter to CRT ANODE.
3. Adjust the variable register RV801 on the power assembly so that high voltage may be to be between
31.5KV ~ 32.5KV.
Screen Voltage Adjustment
1. Press the S2 button on the service remote control.
Vertical deflection will be down, and a horizontal line will appear on the screen.
2. Turn the variable screen volume of FBT to adjust screen voltage, at the point that a horizontal line only just appears.
Focus Adjustment
1. Tune on RETMA pattern.
2. Turn the variable focus volume of FBT so that the center area of screen is sharp scanning line.
3. Turn the variable volume R522 on the CRT assembly so that the edge of screen may be sharp scanning line.
White Balance Adjustment
1. Input the Black & white signal to the HD Component jack on the rear panel.
<Black & White Pattern>
2. The color temperature is the following.
•
x=0.270 0.005 y=0.270 0.005
•
Color temperature : 13,214
°
K
3. Light Area Adjustment
1) Press S8 button.
2) On the center of light area, attach the sensor of a white balance meter.
3) To be Y=100, turn the Light Beam control volume on the White & Black pattern generator.
4) To adjust the white balance of light area, select Drive R, G, B with CHANNEL Up or Down buttons, and adjust
individual values with VOLUME Up or Down buttons.
4. Dark Area Adjustment
1) On the center of dark area, attach the sensor of a white balance meter.
2) To be Y=15, turn the Dark Beam control volume on the White & Black pattern generator.
3) To adjust the white balance of dark area, select Bias R, G, B with CHANNEL Up or Down buttons, and adjust
individual values with VOLUME Up or Down buttons.
4) Repeat two processes above until the white balance is completed.
Dark Area Check
Light Area Check