Question about Pioneer SD-P50A5-K 50" Rear Projection Television

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Convergence On a  SD P4681, the blue convergence line doesn't move left or right

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Re: convergence

Convegence amp ic are bad

Posted on Jan 17, 2008

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Hitachi 51f59/a red and green projectors are not working

If the set is 3d or colors skewed look to see if set has "magic focus" which is auto convergence---it may or may not help. Also look in customer menu for convergence to see if you can call it up with the remote-----a set with this: if red or blue lines will not move in some direction(not adjust) one of the two stk convergence chips is bad.

Kits are available and it can be a do it yourself repair---look first to see if convergence will not adjust and if you have that let me know if you need advice----for example: red will move up/down but not left right.


Oct 21, 2012 | Hitachi 51F510 51" Rear Projection...

1 Answer

Multi-point convergence -- Lower left quadrant of screen distorted. Red ok. Blue arched up and then done to normal in Lower right quadrant; left-right adj moves vertical gridline but is s-shaped. Blue...

Look in users manual or internet you should find how to access service mode, this is different from regular setup CONVERGENCE, this involves getting into changing parameters to tweek convergence, even after amps are changed. These projection tv's are known for loosing convergence if bumped, moved and amps go bad in time.

Jan 03, 2010 | Pioneer PRO-520HD 53" Rear Projection...

1 Answer

Mitsubishi 55859

if i understand you right your blue convergence is off? and you have tried to go into the adjustment for the convergence? now do you crosshairs move up and down and left and right? on bpth red and blue. I see two possiblitys for this your convegence output ics commonly called stks or and you convergence ouput resistors. not a difficult repair for most shops and aroud 250 for parts and labor the ic run about 45 apeice

Jun 19, 2009 | Mitsubishi WS-65809 65" Rear Projection...

2 Answers

Convergence lines are SLANTED. Red line is above

Your TV most likely a convergence 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.
Here are some photos of convergence problems.

Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.


You will need to replace the convergence chips and possibly some convergence resistors and pico fuses. Its a fairly easy DIY job or you can call in a pro. If you want to do the repair yourself check the site Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, thermal paste, email/phone support, etc.

Apr 26, 2009 | Hitachi 53FDX01B 53" Rear Projection...

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Looks 3d

Do not open anything until you. Go to menu on your remote find convergence and press the volume button to the right go to manual and press right again. you should see a bunch of rectangles, now you should also see a set of red cross heirs press the #2 to move cross heirs up and eight to move down numbers 4 and 6 will move left and right and 5 will place the cross heirs back to the center once you have chosen the selected section to adjust line up the magenta with the other colors using the channel and volume buttons these move the lines up down left to right adjust all lines until they are white. i do not know how to switch from magenta to green or blue but this should get you started on the right track with out having to replace anything. good luck! if you figure out how to switch from maqgent to green or blue please post it so that I may adjust mine as well tahnks

Dec 26, 2008 | JVC AV-65WP74 Rear Projection Television

1 Answer

Convergence issue

try fixing the convergence 2 after your've aligned the convergence 1 - the second (accessed via the set up control) let's you adjust on 9 different axis to align the red and blue tubes to the green. you select which + sign you want to adust by pressing the corresponding number for the + ie 1 for the top left, and 9 for the lower right corner.

good luck (note - you cant change the green only the red and blue, if the whole edge is a mess try moving the image (you need to be in zoom mode, and then access the position adjustment via the pitcure set up screen.

Nov 05, 2008 | Panasonic PT-47WX49 47" Rear Projection...

1 Answer

Looking for part/number and location Pioneer SD-P4681

I found this on one site:

Remove the speaker grill then the panel behind that you will find a board mounted to that panel find the big ass Ic ( STK4277 ) and change it,
problem solved almost every time

Hope that helps...


Mar 06, 2008 | Projection Televisions

1 Answer

Toshiba 43A9UE convergence problem

Check the resistors right next to the Convergence ICs often 1 or 2 of them go oen when the ICs fail.

Feb 09, 2008 | Projection Televisions

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