Question about Samsung HC-P4752W 47" Rear Projection HDTV-Ready Television

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Samsung HC-P4752W No Color

I recently replaced my STK392-010 convergence chips for this tv. Everything went well, solder was perfect and reinstalltion was smooth. I turn the tv on and start the realignment procedure. No problems there, red, green, and blue are aligned perfect. I then exit after saving the settings and try to watch some tv. This is where the problem is, all channels and all inputs display in black and white. The menu shows up in color, and the PIP (with all sources) also shows up in color, so I know the TV is capable of producing a picture in color, but the main output is black and white. In addition, when the convergence was screwed up, and the self focus button was pressed, it would fail and say (Check Factory Data). This is still happening, preventing self focusing. Does anyone have any suggestions on how to fix this? Is this a service menu setting? I wanted to check the service menu setting values, but I don't have the service manual, anyone know these?

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  • djmannos Sep 19, 2007

    Thanks techman, I will make sure all physical connections are properly seated.

  • djmannos Sep 19, 2007

    Any idea why I am getting the "Check Factory Data" message?

  • djmannos Sep 19, 2007

    I will update your solution when I get the service manual and try it out. Thanks for the help so far.

  • djmannos Sep 30, 2007

    Ok, so the problem was fixed setting all the correct values in the service menu. They were not set properly and caused the screen to be black and white. The settings take effect when the tv is turned off then back on. Convergence modules were replaced and manual alignment is required to perfect the image.

    thanks for your help.



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Do not automatically think you need to go into the service menu. I bet you 100 to 1 that you pulled out a plug or a connector somewhere OR one is not seated into the plug all the way. If the set worked with color before you messed with it, there is not a problem in the service menu. The service menu is not the fix all thing. it is there to make fine alignments and adjustments, and as a matter of fact, messing with a service menu even with the service manual is very dangerous. I have seen peeps ruin TV sets by messing around with the service menu alignments. STAY out of these alignments. they are not going to fix a problem that all of a suddenly comes up. Repair the problem in the circuit first. Good Luck

Posted on Sep 19, 2007

  • Larry  Dillon
    Larry Dillon Sep 19, 2007

    Yes, now that is an alignment procedure that has to be done from the service manual and you will need special jigs to do them with. The flash or magic focus is nothing more then preset convergence alignments. You may have also a problem still in the convergence circuit. A lot of folks do not bother resetting the auto convergence settings, as the set can be adjusted fine. If you wish to attempt this assignment, you will need the service manual and that is available Here



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Posted on Jan 02, 2017

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SOURCE: STK392-010

The value you are looking for is 3.9 ohm. Just ohm them out and replace the ones that are not right on the money= very important for longevity. Don't forget to clean and apply new heat sink compound to the heat sinks.

Posted on Mar 28, 2009

  • 8617 Answers

SOURCE: Convergence problem Samsung HC-P4752W

check the 3.9 ohm resistors as well as some of them may be open also

Posted on Mar 29, 2009

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