Alignment and Adjustments
4-10
Samsung Electronics
4-4 Other Adjustments
4-4-1 Screen Adjustment
1. Warm up the TV for at least 30 minutes.
2. Turn to the Video Mode (No Signal) using a
remote-control.
3. Connect an oscilloscope to RK,GK,BK.
4. Adjust the VR (VR501, VR531, VR561) screen
so that RK, GK, BK pulse is 20Vp-p each.
(Turn the R,G,B VR screen fully
counterclockwise in the area of each flyback
line.)
4-4-2 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:
Mute
→
1
→
8
→
2
→
Power ON
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 /- keys.
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 /- keys.
9. Adjust the high light with viewing the light
side of the screen.
10. If necessary, redo adjustments 6~9.
11. Press the Menu key to exit.
4-4-3 Sub-Brightness Adjustment
1. Input a sub-brightness adjustment signal.
(TOSHIBA PATTERN)
2. In the stand-by mode, press the remote-control
keys in the following sequence :
Mute - 1 - 8 - 2 - Power ON
3. Select SBT by pressing the /- keys.
4. Adjust so that the 7th step on the right side of
the screen is not seen (Use the /-
keys).
5. Press the Menu key to exit.
4-4-4 High Voltage (31KV) Check
PRECAUTION
1. Input a lion head pattern.
2. Select “STANDARD” video mode.
3. Warm up the TV for at least 10 minutes.
4. Use a 1000:1 probe.
ADJUSTMENT
1. Connect the (+) terminal of the 1000:1 probe to
the high voltage distributor and the (-)
terminal to GND (located on the deflection
board).
2. Adjust VR471 (located on the deflection board)
so that the digital meter indicates
DC 31V
±
0.1V.
Содержание PT54925S/SMS
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