SAMSUNG SP52Q7HRX
Service Manual

Alignment and Adjustments

1-4 Other Adjustments
1-4-1 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. Check if the VIDEO1 EEPROM DATA in the factory mode is the initial value. If not, change it to the initial value. 4. Connect RK, GK and BK with the scope probe. 5. Conduct a preliminary adjustment by changing the screen VR. (1) Turn the VR501 to check if it returns. Turn it in the opposite direction and stop the VR at the point when the RED disappears. (2) Repeat the above process with VR531 and VR561. 6. The screen on the R.G.B. CRT panel. Adjust RK, GK and BK pulses on the screen to 20Vp-p each changing the VR (VR501, VR531, VR561). (1) Upon adjustment to 20Vp-p return the factory mode EEPROM data to the previous value. (2) For R.G.B. screen VR, move to the point where each of R.G.B. blanking occurs, and turn it in clockwise direction. 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.

1-4-3 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 : DISPLAY� MENU � MUTE � Power ON 3. Select SBT by pressing the Volume +/- keys. 4. Adjust so that the 7 step on the right side of the screen is not seen (Use the Volume +/keys). 5. Press the Menu key to exit.

1-4-4 High Voltage (29KV) Check
PRECAUTION
1. Input a lion head pattern. 2. Select �DYNAMIC� video mode. 3. Warm up the TV for at least 10 minutes. 4. Use a 1000:1 probe.

1-4-2 White Balance Adjustment
1. Select the �DYNAMIC� video mode. 2. Input 100% white pattern. 3. In the stand-by mode, press the remote-control keys in the following sequence: DISPLAY � MENU � MUTE � 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 Volume +/- 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 Volume +/- keys.

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 RR471S (located on the deflection board) so that the digital meter indicates DC 29V ± 0.1V. (Conversion: 29KV±100v -> based on 1000:1)

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