Hi folks. I have been reading forums for 2 weeks now and figured out my ic's were bad. Replaced them both (STK392-560) and a 5-amp fuse on the "G" board. Put the set back together and turned it on to see the bow-tie effect was gone but when I flash focused,it didn't help much.
When I'm in manual convergence the red will not move left to right.Up and down is fine.
I turn the set on and the light in front flashes 4 times.Vertical deflection stopped???
Can anyone help me trace this the problem.
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If the tin can module you are referring to is the hyper module, it is common to replace all 11 caps because the factory caps ****. Check for bridged solder connections at STK's search the forum at electromaniacs for 50h81 :)
Yes your model uses two convergence ICs they are STK392-010 alot of people say change only one but thats wrong as one IC controls red and half the green circuits, and the second one controls blue and the remaining green. so if one IC goes it places a strain on the other one because of the green. So change both and you will avoid having to do it all over again in a few weeks. Heres a link where you can get new replacement ICs and they provide free instalation instruction as well as free on line instant messageing when youre ready to do the actual repair which takes about an hour from start to finish. heres the link. http://servicemanuals.vstore.ca/
does the crosshairs move up and down on red... do they move side to side.... if they fail to move at all then the ics must be bad and will have to be replaced.. unless your technical(xperience in solder techniques or know someone that is it will cost you about that. then after that you have to align the set which can be tricky.
your convergence amp ic's./if you want to cheat/align the other two colors and manualy move the green yoke rings on the green picture tube neck so the green cross aligns with the red and blue.,they shuold form white when all three are aligned,on top of each other.
It sounds like the convergence amplifier IC for the red crt is at fault. To check this, go into your user menu and pull up the red convergence. Try to move it up/down or side to side(it doesnt matter). If it moves up and down, then the vertical amp is working. Likewise if it moves side to side, then the horizontal part of the IC is working. If it dosen't move at all, or only moves up/down or side to side, then the IC is bad.
There are 2 large IC's on the chassis, mounted to large heatsinks. They have STK392-110 or some variation of an STK392. If yow feel that the IC is bad, change the ic BEFORE you go into the service mode, as you wont need it if the ic is bad.
To get into theservice mode:
1 make sure tv is in cable mode
2 set sleep timer to 30 minutes
3 tune to channel 124
4 use volume down on front of set to turn volume all the way down. ( writing will appear in the top left corner).
5 use remote control and press the power button.
6 the 7 button on the remote will put it convergence mode.
I am woundering if the repair folks did the proper job and used the right IC's as alot of NON authorized shops will use the cheap aftermarket repalcement ICs and not even use any new heat sink compound. 4 repairs in 5 years is very excessive! I would not have called the same shop(s) to do the repairs. Put on the test scren on the TV set and see if the convergence is off. If it is make the shop replace them again for free or ask for your money back. Man what a rippoff that is. Good Luck and keep us informed of your progress with the shop and the repair.
It is a good possibility you damaged something on that PCB that had the IC's, I like to use an upgraded chip the STK394-160e that is designed for HD signal stresses. I dont know why they ordered the convergence board but I suspect it would have been ok, there are also 2 jumpers that need soldering JW10 and JW50 that supply power to the chips and they REQUIRE resoldering or it will fail again. Might try reseating the RED CRT board, check for cables that you may have unhooked to see if they are not seated in their sockets properly, double check every wire you unhooked, Make sure you used a Silicone Heatsink Compound on to the back of the IC's. I dont know what all you unhooked, but check the wires going between the CRT Boards. Check for cracks in the boards to make sure they werent flexed to much. Good Luck.