Question about Samsung HLR5067WX 50" Rear Projection HDTV
I have a red convergence problem in my SP-43H3HT SAMSUNG rear proyection tv. i´ve changed converg. amps STK392-040 and red image component is still out of sincrony Could you plasae help me? the pcboard is P59A CHAMP-PCB SUB BP41-00070C
SOURCE: Convergence adjustments
Replace both convergence ICs nuber STK392-040 that should take care of the problem. you can get new replacement ICs at the following link and they will send free instalation instructions with pictures so you can install the new ICs. heres the link.
Posted on May 27, 2008
The Samsung has bad convergence IC's most likly. This should be repair ONLY by a trained technician as a TV set is not a place to experiment or tinker with because of the extremly high voltage inside. This repair should cost you in the range of 250 to 400 bucks . Good Luck
Posted on Jul 31, 2006
Each convergence IC has a fusible link going to the IC. On the foil side of the board you will see the fuse size, usually 3.15a. Check both with an ohmmeter, like you would check a normal fuse. Replace the one that is open and that should take care of your problem. Good Luck.
Posted on Apr 29, 2007
I would replace both of the STK392-040, and check the resistors with one side out of circuit. The variable resistors are melted at the factory after the resistance is dialed in. I would check the resistance on it before replacing it. You can get replacement ICs and resistors at the following link and they provide free instalation instructions.
Posted on Jun 10, 2008
The tv has 2 focus adjustments for each tube, mechanical and electrical.
1. Mechanical focus is set by looking at screen from back (through inspection plate on back of most samsungs) and rotating the lens assembly on CRT. loosen wing nut and turn lens assembly to go through focus and back to best position.
Put convergence pattern on screen and manually misadjust bottom red and green lines convergence so they can be seen through inspection hole.
With back cover of TV off you can usually reach your hand up beside the lens assembly to loosen the wing nut then rotate to adjust. Green is in the middle. The focus will be obvious when you rotate and look
When you are finished make sure the foam dust protector is not over any of the lens assemblies and the wing nut is tight.
2. Electrical focus - located at front of unit. the front grille/speaker cover is removed and maybe a cover over the front crt inspection hole.
In the inspection hole there is a black plastic "Focus/screen adjust Assembly" with 2 rows of 3 controls.
One row is focus and the other is screen. The middle controls are for green with R/B on either side. Usually the controls are labelled as "focus" and "screen". You want to adjust the focus controls, one for each color. Look for the focus or screen label imprinted in the plastic. Don't play with the screen settings.
With the same misadjusted convergence pattern you can see a red, blue and green line. Adjust green focus and watch green line for best focus. Do same for other 2.
Screen adjustments are very exact and delicate. The easiest way to deal with them is to turn color off in Customer adjust menu. Put any color tone adjustments in the middle (low, med, high, put at med).
You should have a b/w picture if there are no crt or other color related faults. If it is close to B/W leave screens alone.
If the pix is too green, then the green screen setting must be reduced a small amount. Do not play with these adjustments as most TV repairrers have a difficult time adjusting them.
If focus adjustments don't help then focus control or CRT may be defective. Needs expert to determine.
Posted on Jun 25, 2008
TAKE SOME ADVICE:
Lots of people try to buy a "board" for this kind of repair and it is a mistake.
If you have a convergence problem just get someone to replace the two STK-392-040 convergence chips this set uses.
Yes, there are two fuses near them that need to be checked--you can get all (both chips and the fuses) on EBAY for less than 20 dollars.
A replacement board will be more and I have seen several people who suddenly had new problems who did this.
Replacing the board sounds better but usually is not.
This set is not the most easy to work on but replacing the BAD parts is as easy as changing a board.
If you need to know--there is a seller I use on EBAY WITH THESE CHIPS.
These sets are not like the Plasma sets where they only sell circuit boards--with this kind of set you are almost always better to fix the board you have.
If you need any help do not hesitate to ask--I am here to help.
If this information helped you rate this solution as I do this here for free.
Posted on Dec 20, 2009
Testimonial: "I was about to order a new sub Deflection Board. I am now going to make a call and ask a repair shop about the cost of replacing the defective parts."
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