Gotta Fish
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Mar 30, 2007, 1:00 PM
Post #1 of 5
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Samsung HCP4752W trouble
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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 lest 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. When I got into the service mode there are adjustments and fixed setting. In the 480p Offset mode, adjustment value should be done to, V Amp, V Shift, H EW and H Shift. However I can not change the value. What going on here? What does V Amp, V Shift, H EW and H Shift meaning what?
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 of the fixed. So it's not the remote control. What is going on here?
I press Reset 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 ROM 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?...
Thank you....
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