Sanyo dp46848 half screen dark and lagging

[ntehicks]

I Have seen this before when half of the screen goes dark and it looks like the darken side can 't keep up with the video it laggs behind. I have taken apart the tv and pushed on both the most furthest right and left tabs and the picture then goes perfect. except now the picture is washed out. The picture is all white and very faint. and looks alot like a negitive. I wanted to see what you would suggest I start with. replacing T-con or Main board? thanks for you help.

[Caleb]

Re: Sanyo dp46848 half screen dark and lagging

You can test the gamma voltages on the tcon to verify the as15 chip is malfunctioning. the voltages should evenly increase or decrease by about 2 volts per test point. although with already failing tab bonds it may be a tab bond issue causing the low contrast picture.

[tom66]

Re: Sanyo dp46848 half screen dark and lagging

Sounds like you have two faults - tab bond and AS15 gamma IC...

[twe2011]

Re: Sanyo dp46848 half screen dark and lagging

I have a Sanyo Model #DP46848.

My problem is a color and ghosting, or imprinting of the last words. Not fading or lines not unless you have the menu on, then you can see fading of lines.

I have taken pictures of the symptoms but I am new to this website.

[twe2011]

Re: Sanyo dp46848 half screen dark and lagging

See my note from earlier.

When turning on at first, it had flickering to normal color but only for a second. Then after it had completely warmed up, it remain with these issues.

The TV sat in our bedroom, not used often. Bought it in 2010.

[Shane711]

Re: Sanyo dp46848 half screen dark and lagging

I seen this problem before that twe2011 pictures are showing. I replaced the main board and the problem was fixed.

[steviewonder]

Re: Sanyo dp46848 half screen dark and lagging

I would wholeheartedly agree with Tom 66.as15-f ic's are poor on reliability,the RM5101 is a direct,much more reliable gamma ic.Bit more expensive,however.Along with tab bonding.