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

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Adjusting convergence grid

Hello, Thanks to Premtech for the good advice. Greatly appreciated. It was suggested to use higher wattage amps. I did this and tv looks great. What im woderning now is if any idvice on adjustments to the convergence grid. I think i might have tweaked some settings before I replaced the amps. I look at the grid and it is not all stright and perpindicular. Mostly the linnes are all matched up and white. But the red is off a little on the very outsides. All colors are moveable. Im wondering if and how Im supposed to get the lines all stright and perpindicular after alighning the colors up? I dont want to mess anything up more by screwing with the grid to much. I dont know if that will burn anything up. The grid looks decent now but .. Looks wavy . Should I adjust or just line up the the red thats off a little bit. I dont know what a correct grid should look like. Thank you very much for your time .. this is a great site!!!!!!!

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  • Master
  • 4,402 Answers

I correct grid will look all white. all colors aligned up.
you should be able to move the lines with the remote. and you cant burn anything out by doing convergence.

Posted on Jan 28, 2008

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SOURCE: Con

double post.

Posted on Jan 28, 2008

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2 Answers

Panasonic PT-53WX42


Your TV most likely has a Convergence Chip Failure ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem

  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
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2c07611.pngSolution #1

You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com . They have put together convergence repair kits for most models.

The kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, thermal paste, etc. Everything you will need to do the repair yourself.

May 14, 2009 | Panasonic PT-56WX53 53" Rear Projection...

1 Answer

I have the mitsubishi 55711,i have a double image


This is a V-21 Chassis common, with these symptoms, for failure of the convergence amps. This set uses two STK 392-110 Sanyo amps mounted on a heat sink and hard to miss. They're a 40 pin ic about the size of a half pack of cigarettes.
It has also been my experience that two or more of the yoke return resistors need to be replaced, most commonly R8c21 and R8c22, both are 3.9 ohm 1w but test all of them for reliability.
Hope this helps!
Bill

William Rayburn, CET
Premium Technologies
PO Box 442
Long Beach, WA. 98631
360-642-4993
premtech@willapabay.org

May 14, 2009 | Mitsubishi WS-55711 55" Rear Projection...

1 Answer

GUNS MISALIGNED. Green grid is skwed.


Both of you need to have the convergence output ampifiers replaced. Very common. A reputable repair shop charges between $200 and $350 to fix it in your home. Cost is dependent on where you live.

May 07, 2009 | Mitsubishi WS-65869 65" Rear Projection...

2 Answers

RED Convergence Alignment issue


Replace both STK392-110 Convergence IC's with Toshiba or Sanyo quality................No cheap IC's !!!......................T.

Aug 16, 2008 | Toshiba 43H71 43" Rear Projection...

1 Answer

CONVERGENCE PROBLEM IN TOSHIBA 43H70


Replace both STK392-110 convergence IC's with Toshiba or Sanyo brand........no cheap junk IC's !!!.................T.

Aug 16, 2008 | Toshiba 43H71 43" Rear Projection...

1 Answer

Convergence issues


Drifty convergence IC's need replacing..located on center PC board......STK392-570...change them both for reliability...T.

Feb 28, 2008 | Mitsubishi WS-65809 65" Rear Projection...

2 Answers

Convergence settings


Key Functions
7,8,9 = select R, G or B
+100,0,PRE-CH = mute R, G or B
INFO = test/normal
4 = shifts from point to line, grid move
2 = restore factory
SOURCE = H/V select
ADD/DEL = Save
S.MODE = exit
MUTE = cursor forward
P.MODE = cursor back
Volume +/- = moves convergence left or right
Channel +/- = moves convergence up or down
1 = zero's all convergence settings (ugly!)
U/D/L/R = move cursor
SELF FOCUS = saves the convergence adjustment - do before exiting

Good luck.  I let a sub-standard service joint work on mine - they replaced the OEM chips with a higher wattage equivalent, and I've had nothing but problems ever since.

Oct 11, 2007 | Samsung HC-P4752W 47" Rear Projection...

1 Answer

42"Samsung HCN4226WX/XAC


· Samsung parts for convergance problem
· http://www.partstore.com/Part/Samsung/Samsung/BP9500142E/New.aspx

Oct 09, 2007 | Samsung HCN4226W 42" Rear Projection...

1 Answer

Convergence problem


mostly defective convergence are subject to replace!

Oct 05, 2007 | Mitsubishi WS-55807 TV

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