I replace the stk it muve the lines the cross is ok is completly white but when the tv image apears the combergence is not ok, i want to know the parameters for the tecnician comvergence. thanks for your help
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Re: hel whit mi hitachi
Remove speaker grill cover on tv lower front.Remove access panel. Locate small blue push switch = activate convergence grid,then use 2 & 8 , 4 & 6 , and enter along with adjuster arrows if I remember right, then magic focus last..............T.
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hi ,thats is your convergence circuit is defect,you got 2 integrated circuit call
STK 390-xxx the ic # are depend of the tv chassis model number,
they got to be replace whit new one/ the component arround the ic like resistor ,capacitor
and some time 2 transistor for the minus 25volt,and plus 25 volts
some time you replaced just the stk ic and its ok,anyway taht have to be trouble shoot
if you know a good tech its will be better, or if you have some experience whit this ok
that is an hour job about to verify the circuit component near the ic like some low value resistor
.thats all i can do from here....
hope that give you an idea and have a merry christmas
regards : Alan tech for hitachi ...
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This set uses two Stk-392-110 convergence IC chips; both need to be replaced along with any of the 2.2. ohm light blue resistors around them; a bad resistor will be white in the middle; You can buy both for less than 13 dollars plus shipping on Ebay.
The chips are located on metal heat sinks with fins and are side by side. They are black(about 2 inches wide by 1 1/2 tall) and should have the STK-392-110 number printed on them in white.
Depending on your level of skill at this kind of work you may be able to do it yourself---if you need step by step instructions contact me---I have them in Microsoft word---start to finish repair including what you will need to do it.
If you are not able to do the repair yourself now is the slow time of year for TV repair shops----It should be fixable right in your home and the repair takes about an hour--I have done hundreds of these sets--some shops charge 300-400 but I do lots of them for 200-250 total cost. Make sure whoever you get changes BOTH of the chips!
Shop around and if they say "needs to go to shop" keep looking; any good tech can do this right in your home.
I do this here for free so if this helps you give me a vote here. If you need direct help contact me.
Convergence ICs replace them bot 2 big black ics STK392-560s not sure what your STK numbers are but use same number to order parts call Electronix Parts 1-800-223-3205 PS if they are using 110s use 180s if 020s use 040s better ics.
hi there. sounds like a bad convergence IC. possibly a broken connection(s), parts are located on a large heatsink near the center of the main chassis, part number is STK391-110 for standard definition and STK391-570 for high definition, the location and part numbers can vary from model to model and year to year. hope this helps.good luck and be safe.
When you activate the Mj focus the TV is restoring the data from the TV's digital circuits. So, you have the ability to change the IC's you can do this.
You need to go into the con service mode. Take off the front grill, remove panel, 6 - 8 screws. From the front there is a switch on the left hand side, it is small, white button with TV on. now you are in the service mode, using TV's remote adjust. Make sure you save dat. Go hit on line site get more info.
you have to replace all 3 ic's and 2 are stk 392-110 and the 3rd one is stk 392-150 they are located on the extreme right of your tv on a long heat sink all 3 are located there.You can get replacements as well as free tech online support at http://servicemanuals.vstore.ca/