Question about Samsung HCM5525W 55" Rear Projection Television

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Perfect focus or convergence

Manual color convergence won't work.

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Re: perfect focus or convergence


Posted on Jan 10, 2008

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Got new STK392-040 chips and picture is still distorted. Manual convergence still won't alligne all colors.

the 183 is entry into the tech menu===you need to test all the low value resistors around the convergence chips(only 6 or 8) and they will read low and a resistor with NO reading may be your problem.

Also these sets use a pico fuse going to each chip--either right with it or back at the source----know what a pico fuse looks like"

Mar 12, 2012 | Samsung HCM4216W 42" Rear Projection...

1 Answer

Samsung Projection TV - Yellow White Level and Auto Focus Failure

perfect focus is based on service mode convergence. FActory setting as it were. the set needs to converged in service mode then these values stored then it should work

Jan 03, 2008 | Samsung PCL541R 54" Rear Projection...

1 Answer

"Perfect Focus" problem on Samsung HCN4727W

You have a bad sensor, a bad digital convergence board, or the new board is not working correctly. I would start by swaping out the convergence board or exchange it for another one. Good Luck

Nov 08, 2007 | Projection Televisions

1 Answer

Screen Out of Focus with Wavy Lines - Perfect Focus Will Not Corr

This is a common problem. Its called a convergence failure.

Problem #1) Convergence


  • Screen Looks 3D
  • Colors wont align
  • Video may look distorted
Problem #2 CRT Fluid has clouded over. Symtoms
  • Dull looking video
  • White looking video
  • Halos around objects
  • Red/Orange looking video

You can see some examples and find a fix here...


Mar 06, 2009 | Samsung HCM4215W 42" Rear Projection...

1 Answer

Thin red line down the middle of screen

Enter muye 1 / 8 /3
it puts you into convergence mode and clears out all bad magic foces data.
then run perfect focus to save new data.

hope this helps

Jan 08, 2009 | Akai PT4298HD Rear Projection Television

1 Answer

Convergence perfect focus not working and double vision

The problem you have is the 2 STK - 392 convergence integrated circuits need replacing the cost in the UK is about £150.

Nov 26, 2008 | Projection Televisions

1 Answer

One color Bow-tie Effect.

SAMSUNG Convergence Problem

It looks like blue convergence. Look at menu, select convergence and see if blue top is bent down on convergence adjust screen. Probably won’t adjust.

Some Samsungs have convergence IC’s on a separate convergence board in the back of the TV. Others have the IC’s mounted on the main deflection board. Either way the board has to be removed to get at the dud IC’s and associated burnt resistors.

You remove the appropriate board, determine if any resistors are burnt or damaged, replace any burnt or out of tolerance resistors, replace 1 or 2 IC's and re-install the board.

Now you have to adjust it to look like new.

If the unit has not been misadjusted and everything is OK now, running the auto focus may put the picture back to it’s previous stunning quality as it was before IC failed.

If after Perfect Focus it is still misadjusted noticeably, try the customer convergence adjustments. Operators’ manuals are available on web through searching.

If convergence can not be adjusted properly, you messed up chip install or resistors may be wrong value or open; or it needs major adjustment.

If you live around Calgary, Alberta try me instead:

Or try to the find the repairperson part of this website (on the Homepage) and search postal code. Maybe you will be lucky and someone from your area is listed for Projection TV repair.

Most rookies doing this job will cause damage and not be successful. They will pay double for someone to fix their mess or end up scrapping the TV. It is not a simple task. It is more difficult than batteries on a remote.

Good Luck


Jun 05, 2008 | Samsung HCN4226W 42" Rear Projection...

1 Answer

Samsung HCN4226W blue color outlines

Samsung parts for convergance problem
This convergence board works with the following Samsung television models: HCM4215W, HCN529WX, HCN559WX/XAA, PCN5425R, HCN4226WX, HCN529WX/XA

Mar 10, 2008 | Samsung HCN4226W 42" Rear Projection...

1 Answer

Convergence Problem

Perfect focus in these sets are dependant on factory or service mode calabration. once the unit is calabrated then those setings are stored to be the basis for perfect focus. The fact that you can manual converge the set is a good thing. probaly nothing phycially wrong with your set. However. what is needed is to get a qualified tech to look at your set and to calabrate the convergence.

Mar 04, 2008 | Zenith IQC50H95W 50" Rear Projection...

2 Answers


Im trying to install that same board on the same tv how did you do it?

Apr 06, 2007 | Samsung HCL4715W 47" Rear Projection...

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