Question about Hitachi UltraVision CineForm 55VG825 55" HDTV

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Hitachi rear projection

Where is the convergence board located in my 51" rear projection so that i can see if anything is broken. I had a price of 250. to have it fixed. thanks

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KIT10 $29.50
Repair Kit for Hitachi convergence Chassis DP-14G
KIT10 Includes 2 pcs STK392-150 , 1 each of the following 1W axial lead fusible resistors:

Posted on Dec 05, 2007


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Your convergence board is on the fritz! Try contacting and see if they can help you!

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How do I fix a converence problem?


First try using Autofocus. If there is a convergence problem this won't fix the problem.

Try using the convergence alignment procedure from service manual.

Here the procedure that works on most Hitachi rear projection.

Here the grid with convergence problem


If the procedure does not work, then the two STK392-110 on convergence board must be replaced.

Before replacing the ICs you can test the pico fuses located on convergence boards. Simply read ohms to test if they have continuity.

Better also testing components on convergence board like resistors located at the base of STKs.

After removing the old STK, the new ones must be re-soldered using cooling paste.

Price for single IC can is about $8/$20. I think
STK392-110 on this model can be better replaced with STK392-150. I suggest contacting the seller on this.

The service manual is available here.

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My Hitachi TV Model #51F500 is showing shadows and double lettering (in other words a terrible picture). Please help.

This sounds like convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors. Shops usually $200-$400 Be sure to vote/rate me if this helped Thanks!
See link for more detail

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Hitachi rear projection

bad solder connections on convergance board solder the connections if this does not work then replace them

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