Screen Adjustment; White Balance Adjustment - Samsung HCR4755WX/XAA Service Manual

Alignment & Adjustment
2-4 Other Adjustments

2-4-1 Screen Adjustment

1. Warm up the TV for at least 30 minutes.
2. Select the "STANDARD" Video Mode.
3. Turn to the Video Mode (No Signal) using a remote-control.
4. Connect an oscilloscope to RK,GK,BK.
5. Adjust the VR Screen (in the Focus Pack) to have 20VP-P for the RK, GK and BK pulse.
(Turn the R, G and B VR screen fully counterclockwise at each flyback line.)
※ Voltage adjustment connt be done using a normal multi-tester. For adjustment, use an oscilloscope.
The voltage shown by the tester is false data because the AC peak to peak voltage is adjusted under DC
conditions.

2-4-2 White Balance Adjustment

1. Select the "STANDARD" Video Mode.
2. Input 100% white pattern.
3. In the stand-by mode, press the remote-control keys in the following sequence:
4. Warm up the TV for at least 30 minutes.
5. Input a 10-step signal.
6. R-cut off, B-cut off, and G-cut off by pressing the
7. Adjust the low light with viewing the dark side of the screen.
8. Select R-drive, G-drive, and B-drive by pressing the
9. Adjust the high light with viewing the light side of the screen.
10. If necessary, redo screen adjustments and 6~9.
11. Press the Add key to exit.
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keys.
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