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SAMSUNG SP42W4HPX
Service Manual


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

Description of SAMSUNG SP42W4HPX 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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Table of Contents
    1. Alignment and Adjustments
    2. Exploded View and Parts List
    3. Electric Parts List
    4. PCB Diagrams
    5. Schematic Diagrams
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Text excerpt from page 28 (click to view)
Alignment and Adjustments

4-4 Other Adjustments
4-4-1 Screen Adjustment
1. Warm up the TV for at least 30 minutes. 2. Select the “DYNAMIC” Video mode. 3. Trun to the Video Mode(No Signal) using a remote-control. 4. Connect an oscilloscope to RK, GK, BK. 5. Press the Menu key to exit. 5. 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.) 3. Select Sub-Bright by pressing the Volume +/keys. 4. Adjust so that the 63 step on the right side of the screen is not seen (Use the Volume +/keys). keys in the following sequence : Displsy → Menu → Mute → Power ON

4-4-4 High Voltage (30KV) Check
PRECAUTION
1. Input a lion head pattern.

4-4-2 White Balance Adjustment
2. Select “DYNAMIC” video mode. 1. Select the “DYNAMIC” video mode. 3. Warm up the TV for at least 10 minutes. 2. Input 100% white pattern. 4. Use a digital multimeter. 3. In the stand-by mode, press the remote-control keys in the following sequence: Displsy → 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. 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. 2. Adjust RR471S (located on the sub board) so that the digital meter indicates DC290V ± 0.1V.

ADJUSTMENT
1. Connect the (+) terminal of the digital multimeter to Q471 and the (-) terminal to Q401 (located on the deflection board).

4-4-5 F.S. (Fail Safe) Circuit Check (GT430,GT431)
Note : The F.S. Circuit check must be performed after servicing. 1. Turn on the TV. 2. Select the “DYNAMIC” video mode. 3. Short F/S Test point (located on the SUB PCB). Then, both sound and picture disappear. (Note: Even if the shorted terminals are removed, both sound and picture do not appear. This proves the F.S. circuit is working. ) 4. To restore both sound and picture, turn off the TV and reset it after about 30 seconds.

4-6-3 Sub-Brightness Adjustment
1. Input a sub-brightness adjustment signal. (TOSHIBA PATTERN) 2. In the stand-by mode, press the remote-control

Samsung Electronics

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