Question about Panasonic PT-47WX49 47" Rear Projection Television

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Stk394-160 Convergence IC, number on top right of chip

I am planning to fix a Hitachi Ultravision convergence problem by replacing the convergence chips. I got the Hitachi kit and it came with two STK394-160 convergence chips. Each chip has a code in the top right corner of the chip. One code is D7G22 and the other is D7115. I am guessing the chips function the same and I can put either one in either location, but want to make sure the code is irrelevant to which location the chip goes. Can I put either chip in for either chip currently on the board? The chips on the board are both stk392-110 chips. The kit came with six resistors to replace for the chip upgrade which I plan to do. Hopefully it will go well if I put the chips in either location.

Thanks, I have the panasonic ptv47 projection set and ordered the sanyo stk394-160 replacement ic's. After soldering both new ic's to board and turning set on, i see smoke and the set turns itself off. Checked solder joints to ic's to make sure their not touching and as far as i can see they are not. Is there anything else that could cause the smoke? The lamps do not turn at all by the way. Could I have fried something on the board when I desoldered the original ic's? Help!

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  • Qwilson Feb 02, 2009

    I have a Panasonic PT-47WX49e which is experincing the convergance issue with the wavy red line at the lower left part of the screen. I have elected to repair the issue myself. My question is this can you upgrade the STK394-010 to a higher Convergence IC like a 150 or higher also should the resistors be replaced as well or just the convergence IC?



    Thanks,

    Q.

    quintenwilson@yahoo.com

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I have read both of the above posts.
On the first post, the 'codes' are the date codes. Both parts were manufactured in 2007, and will have no bearing on performance, should both lots not be the same as they were manufactured on different weeks.

On the second post:
There is allot of misinformation on the web pertaining to the applications of STK394-160(E)'s.
This special device was manufactured by Sanyo exclusively for Hitachi PTV's. They will not work in any other projection TV's except for Hitachi. Let me say this again, "They will not work in any other projection TV's except for Hitachi." The 'E' suffix is the nomenclature for PB Free or lead free. All STK394-160's were manufactured as 'lead free'. The 'E' will not appear on the part. Here's more information:

For Hitachi PTV's ( Projection TV's ), STK392-150 replaces STK392-110. STK392-120 should be replaced with STK392-120 or STK394-160's in matched pairs. The -120's are 4 amp devices while both the -110's and -150's are 3 amp. We market replacement kits for -110's that contain two original Sanyo STK392-150's and the associated resistors along with solder and resistor designations for all models. We also have an STK394-160 Kit, along with solder and resistor designations for all models.

Prelco electronics is a direct purchaser of STK's IC's directly from Sanyo Semiconductor Distribution. If you would like the real parts, your search has ended. Parts can be ordered on line, or toll free: 888-773-5268, ( 908-429-9999 local ) Sales X 2, http://www.prelcoparts.com
Feel free to contact us via email: sales@prelcoparts.com

Posted on Jan 26, 2009

  • prelco Jan 26, 2009

    The STK392-180's were made for Pioneer to replace STK392-110's. They are not to be used in place of STK394-160's as both the STK392-110'a and the STK392-180's are both three amp, while the STK394-160E's are used to replace both 3 amp and 4 amp devices in HItachi PTV. Will they work as a test ?... yes. But I would not leave them in for the long-term.



    Prelco electronics is a direct purchaser of STK's IC's directly from Sanyo Semiconductor Distribution. If you would like the real parts, your search has ended. Parts can be ordered on line, or toll free: 888-773-5268, ( 908-429-9999 local ) Sales X 2, http://www.prelcoparts.com
    Feel free to contact us via email: sales@prelcoparts.com

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I know there are a lot of questions on what TVs a STK394-160 will work in place of a STK392-110. I just wanted others to know that they may be OK in Panasonic TVs. I put a pair of them (genuine Sanyo STK394-160 from Hitachi x480293 kit purchased from Encompass). 3 years later they are still running fine. My TV is a Panasonic PT-53TWD63G, chassis BP830, MFG 10/03.

Posted on Sep 13, 2012

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I have changed 392-110 thrice! in 5 yrs. which ic's supersede these?
my rptv is phillips 46".
pl help!

Posted on Dec 11, 2011

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Heres your first BIG mistake you have put wrong STKs in Use Stk392-180s or replace with 110s I always upgrade to 180s they hold upbetter Stk 394-160s does not work in this set if ics where 110s then use 110s or 180s

Posted on Nov 29, 2008

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The STK394-160 WILL work in other than Hitachi!! I just put a set in my Mitsubishi.. The convergence was never that easy to adjust!!

Posted on Mar 10, 2009

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WHAT IS ACTUAL MODEL NUMBER OF YOUR TV?


I can give more information if you give me correct model number---if convergence is now working, it has nothing to do with sound unless you created the problem when you repaired it.

The more info you give me the better I can help you.

I am here to help people, I do this here for free.

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Here are some of the most common symptoms and example photos of a convergence problem


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Here are some photos of convergence problems.

3dc9420.jpg
645fba6.jpg
0dcec37.jpg
Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.

0667c5f.pngSOLUTION

You will need to replace the convergence chips and possibly some convergence resistors and pico fuses. Its a fairly easy DIY job or you can call in a pro. If you want to do the repair yourself check the site www.TvRepairKits.com. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, thermal paste, email/phone support, etc.

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Here are some of the most common symptoms and example photos of a convergence problem


  • Screen looks 3D
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  • Screen is bowed or warped.
Here are some photos of convergence problems.

3dc9420.jpg
645fba6.jpg
0dcec37.jpg
Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.

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  • Screen is bowed or warped.
Here are some photos of convergence problems.

3dc9420.jpg
645fba6.jpg
0dcec37.jpg
Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.

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