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

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Samsung HCP4752W I have a 2 year old Samsung HCP4752W projection TV. Took it to the TV guy and he couldn't fix it. He said it is the main board. Well enough of that. I got the service manual and got into the tv system. First thing first. Screen display: Look like Horzional sync (pictures torn) Half the picture on right side is on the left side and the other half of the picture is on the left side is on the right side all with some ghosting. Sound OK, Color OK. Before I go into testing the sevice menu I wrote all value down from the service menu. When I got into the service mode there are adjustments and fixed setting. In the 480p Offset mode, adjustment value could be change are, V Amp, V Shift, H EW and H Shift. However I can not change the value. What going on here? The same thing is going on in the 1080i Offset mode. Adjustment should only be done to, V Amp, V Shift, H EW and H Shift. Changing value on the adjustment on other menu page is, OK. I even tested changing the fixed value. But change back the value setting for the fixed. So it's not the remote control. What is going on here? I press the Reset from the service menu to return the orginial value. Still get the same thing, even after restarting the the TV. One more thing, What is the CheckSum mean? I get a code BB08. Is that the trouble spot? Anyway, is the EEROM stuck or the SRAM going bad? Is there a module I need to replace, the Micom, CG or HDMI module? Could someone help me out, Please?... What do I need to look into? I had repair TV several times but not a rear projection and it will be a real testing ground for me. Hope someone can give me some clues.

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Re: Samsung HCP4752W

You can not change a value in 480p or 1080i unless that is the incomming signal type. Unless you really understand these setting I would be careful of changing any.

Posted on Apr 15, 2007

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