Question about Pioneer SD-643HD5 64" Rear Projection Television

4 Answers

Pioneer sd-643hd5 rear projection 64" tv has green geometry grid problems

Green grid is off in every mode, the least of which is Natural Wide. I can get the red and blue to adjust to most of the wacked green grid in that mode. But these are wavy green lines I'm adjusting to. I've ordered a couple IC's for the unit and will attempt a DIY. I'm hoping that the green grid will snap back into place with the fix. If it doesn't, what do I do next. If it requires getting a manual, where do I go?

Thanks

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  • JFrechette42 Jun 18, 2008

    How do you repair the convergence are there any adjusting pots?

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Yes, replacing those chips should fix those "sudden" convergence misalignment's for any color. Each chip contains 3 amps, one for each CRT Red/Green/Blue. One chip is the horizontal amp, the other is the vertical amp.

My 643HD5 was equipped with the -120 chip, but I replaced them with the newer uprated -180 part. (per Pioneers website)

When replacing yours, be sure to remove all the old heat sink compound. Then apply a thin layer of heat sink compound onto the back of the new chips. More is not better. Secure the chips onto the heat sink before soldering them in place.

Posted on Sep 24, 2008

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I was looking at the "multiconvergence" photo on the first link above and note that the green grid looks perfect while only the red and blue look wavy. On my set the green is the wavy one. Is this an IC problem with the green or is there a seperate more likely cause? I'd hate to do all the work for nothing. Thanks.

Posted on Jan 29, 2008

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Wow, that first link is perfection! I'm worried though. The photo on that link shows the base grid green pattern looking VERY geometrically even with only the red and blue lines off. On my set, the green base grid geometry is off/wavy. Are the IC's the correct fix?

Posted on Jan 26, 2008

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Http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html
Sony Convergence
http://www.techlore.com/blog/entry/19694/Sony-Convergence-Repair-My-Sony-TV-has-a-distorted-picture-/
http://www.techlore.com/article/19631/Sony-Convergence-Procedure/

Posted on Jan 25, 2008

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SD-643HD5 64 in. Rear Projection TV


I had the same problem which was caused by a bad solder connection on my Green CRT driver board. The fix isn't too difficult if you've had some soldering experience.

1) Determine which CRT is going out (Reg, Green, or Blue). Looking at your convergence adjustment screen will help.
2) Unplug TV
3) Remove the front panel
4) Locate the driver board attached to bottom of the bad CRT.
5) Locate the two large heatsinks on the driver board, each has a transistor attached to it.
6) Touch-up the three solder connections on each transistor. Adding some new solder helps.

Jun 09, 2008 | Pioneer SD-643HD5 64" Rear Projection...

1 Answer

Picture is green and stays green


check the convergence area for bad solder connection
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html
Sony Convergence
http://www.techlore.com/blog/entry/19694/Sony-Convergence-Repair-My-Sony-TV-has-a-distorted-picture-/
http://www.techlore.com/article/19631/Sony-Convergence-Procedure/

Aug 19, 2007 | Pioneer SD-643HD5 64" Rear Projection...

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HELP TO FIND IC's CONVERGENCE GENERIC NUMBERS


STK392-180 http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm

Aug 01, 2007 | Pioneer SD-643HD5 64" Rear Projection...

2 Answers

Color Problem on SD-643HD5 (Green is not working)


I had a similar problem with my Green CRT. Fixed it by carefully touching up some solder connections.

1) Locate the Green CRT Driver Board mounted on the bottom of the Green CRT.
2) Locate the two large heatsinks on the driver board. Each has a transistor attached to it.
3) Carefully touchup the solder connections on each transistor. I added some additional solder to help reflow the solder onto the pad of the circuit board. It's a bit tricky because the solder has to fill a large gap between the small leads of the transistor and large holes in the circuit board.

Apr 23, 2007 | Pioneer SD-643HD5 64" Rear Projection...

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