Samsung txr3079 adjustment problem: I have a TXR3079 CRT HDTV (chassis type K62B). I replaced the deflection board to stop a whining/noise problem that seemed to be coming from a transformer next to the flyback. This was a noise issue only; the picture and audio and all digital functions were fine. the new board has OK color and focus but geometry is way off; so I entered factory service mode thru the remote and started through the deflection adjustment menu. All the adjustments responded to commands except for horiz amp gain (H-AMP) and horix pinchusion (H-PAR) ("parabola" per Samsung service guide terminology). These 2 showed no effect on screen. So I have a picture with severe pinchusion and somwhate over-sized to the screen. Vertical is fine (since I was able to adjust it thru the remote), and I adjusted the 3 flyback outputs visually (focus, dynamic focus, and screen voltage); re-adjusting these 3 had no effect on the remote setup adjustments. I was thinkign of putting in the original deflection board and swapping out the noisy transformer with the one from the new board. But I feel something must be missing...why can't those 2 horiz adjustments be made?

SOURCE: Samsung DLP Vertical Hold

Problem is either bad connect inside or heat-related failure....
also called thermal break.....you will need help from a knowledgeable SAMSUNG tech.....prefer authorized service
center, then you can give feed-back to SS customer service if needed.......................T.

SOURCE: samsung txh1970 tv screen has green tint

I encountered the same problem with a color computer monitor several years ago. Everything went green. The repair techies told me that's a sign that the power supply is going bad. You will not be able to adjust the color. You will have to either fix it or replace it. Hope this isn't a common problem with this model Samsung TV.

SOURCE: Wont Power up

jwx41600:

I had the same problem with my Samsung TV Model: TXR3079WHX. However, I was able to repair my set while it was still intermittant (would turn off by itself after 30 minutes of operating, would have to wait 5 minutes before it would turn on again).

I troubleshot my problem with a can of component cooler from Radio Shack and found my problem to be a defective voltage regulator, identified as "QR015" on the main circuit board (the same board that contains the high voltage section).

Caution:

Before I proceed any further I need to strongly warn you. Do not attempt to remove the back cover, troubleshoot, repair or perform the actions that I have done, if you are not a "qualified service technician". Removing the back cover exposes you (and anyone else) to harmful and deadly electric shock, even though the TV may be unplugged from the wall outlet and turned off. You (or anyone else) can be seriously injured or even killed. If you are not qualified, play it safe by allowing others who are qualified repair this for you.

The defective part (overheats and shuts your TV off) is voltage regulator manufactured by Fairchild. The part number is KA75450ZTA. This part is available from Mouser Electronics for less than 20 cents plus shipping. In order to replace this part a qualified technician will need to remove certain cables and unscrew the main board to allow access to desolder and solder the new component.

Hope this helps.