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SAMSUNG SC428
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of SAMSUNG SC428 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

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Text excerpt from page 17 (click to view)
6-5 White Balance Adjustment
Measurement instrument: Color analyzer Scanning frequency: Display image: Brightness: 48.3 kHz/60 Hz (1024 x 768) 60 mm square white pattern VR502, maximum
Conditions

7. Adjust the contrast control WR5011 so that the . l&inance is 3ft-L. ’ ’ 8. Carefully adjust VR102R (R-BIAS) and VR102B (B-BIAS) for the display color to be white. 9. Check the color coordinates at 20ft-L luminance.If there is some error, adjust the VRlOlR 10 Turn the contrast and the brightness controls fully clockwise. 11 Adjust the focus control of the FBT to display the sharpest image possible. (R-GAIN) and VRlOlB (B-GAIN) display a white color. 12. Recheck the color coordinates at 3ft-L luminance and check the white color with rotating the contrast control (VR501). If there is some error, retry the adjustment from (2). 13. Recheck the back raster after disconnecting the signal cable. Luminance tolerance 3.5ft-L - 15ft-L

1. Adjust VR102R (R-BIAS) and VR102B (B-BIAS)

so that the back raster color appears white to

3 _.

the unaided eye. Set the brightness control (VR502) to the mechanical center position and the contrast control (VR501) to the maximum position.

3. Change the video signal to the 60mm square green pattern of the 48.3 kHz/60 Hz. 4. Adjust the VRlOlG (G-GAIN) so that the luminance of the green square is 4Oft-LQft-L. 5. Change the video signal to the full white pattern of the 48.3 kHz/bO Hz. 6. Adjust the VRlOlR (R-GAIN) and VRlOlB (BGAIN) to make the display color white. (X=0.283 + 0.02, Y=O.298 f 0.02)

6-6 Focus Adjustment
Conditions

1. 48.3 kHz,‘60 Hz (1024 x 768) “H” character pattern Maximum Maximum

Scanning frequency: Display image: Brightness: Contrast:

Adjust the focus control of the FBT to display the sharpest image possible. Use locktite to seal the focus control in position.

2.

6-7 Color Purity Adjustment
Color purity is the absence of undesired color. Conspicuous mislanding (unexpected color in a uniform field) within the display area shall not be visible at a distance of 50 cm from CRT surface.
Conditions Note: Color purity adjustments should only be

attempted by qualified personnel.

Direction : Monitor facing east. Display image : White flat field. L u m i n a n c e : Cutoff point at the center of display area.

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