Question about JVC AV-48WP30 48" Rear Projection Television

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Jvc av-56wp30 had convergence problems changed both ic and all resistors now the green is bowed in at the top and bottom any ideas?

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  • mrdane3263 Jul 03, 2009

    changed ic again same problem both ic get warm but still have bowed green lines in convergence screen any idea???

  • mrdane3263 Jul 03, 2009

    I have put in 2 new set, 4 ic's total, each time checked all the resistors and still have the same problem.

  • mrdane3263 Jul 03, 2009

    According to the schems, that is an SDK392-110 HUH???



    I have been repairing tv for about 5 years as a hobby i have NEVER heard or seen these ics what came out were STK392-110 i replaced with STK392-150 i have always used to -150's with no problems

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Hi,
Make sure +28V and -28V are being supplied to convergence out ICs
Do you have schematics/ repair manual of this TV? Download copy from Manual Zone for small fee.
Repair manual says IC804 & IC805 number is STK392-110 and STK392-150 is improved part for same IC due to heat issues.
Below is an image of repair manual..
Thanks.

jvc av-56wp30 had convergence problems changed - 5e33c03.jpg

Posted on Jul 03, 2009

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Hi mrdane,

Just to clarify, the ICs you are referring to are these ones, correct?

jvc av-56wp30 had convergence problems changed - jvc1.jpg

According to the schems, that is an SDK392-110


Just replace with the same numbers and also be sure to test the low value resistors by the IC's with an ohm meter.

NOTE: on some circuits, if the feedback resistor ar bad thru can blow out th new IC, so you may need to start over again

THe same issue happend in my center

I had a JVC AV-56WP30 as well, with a green lamp convergence issue
I ordered STK392-180's as replacement ICs, I put those in and had the black screen, blue power light flashing, relay clicking, speaker thumping deal going on.
So I took the 180's out again an dput back in the original STK392-110s and was back to where I started. So, just to be sure I put the 180's back in and got the thumping again. So I don't think it was my soldering or anything like that. I got two replacement STK392-110s and put them in and the green convergence is still warped.
I noticed the B, G, R lamps each have their own socket on the CKF1589-E01-1 board, I plugged the green lamp into the B socket and the blue lamp into the G socket and the picture looked just like the orginal only now the Blue lamp is the one warped and the green is fine.
So I started looking closely at just the resistors near the G socket. The one marked R862 on the board does look burnt a little. Looking at what is printed on the resistor itself, it says this;
1.8ωJ RNX1 PU 24P

After replacing the resistor it worked... it must be the problem with the some resistor, so try searching for the burn resistor near the IC.....


For more inofrmation refer manual

Here is the 56wp30 convergence pwb pic link, if I have done the insert pic procedure:
.



ENJOY! RATE THIS SOLUTION

RNJ VINOD KUMAR

Posted on Jul 03, 2009

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You have two convergence amps that need to be replaced on the convergence board.This is a very common problem with these units.The part # are STK392-110 but I would upgrade to a STK392-120 or a STK392-150.Also there may be a couple of low ohm resistors that need replacing.Depending on your electronics experience this job is pretty much a straight forward soldering job that requires a certain amount of knowlege.These parts can be obtained from partsstore.com.I as a technician charge between$185.00 in shop and $250.00 inhome for this repair.It is well worth it as this particular chassis really did`nt hve very many problems, and once fixed you will have a like new picture.Good luck!

Posted on Jul 03, 2009

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HAVE A JVC AV-56WP30 REAR PROJECTION TV THAT THE PICTURE APPEARS IN A BOWED SHAPE. THIS TV WAS JUST REPAIRED FOR THIS PROBLEM ONE WEEK AGO AND IN 100 MILE DRIVE TO PUT IN APARTMENT IT IS AGAIN NOT WORKING....


The convergence is dead,Must replaced Convergence ICs and resistors.Tell the shop to repair it again.They probally didn't replaced the ICs or resistors.This problems can't come back about a week,at 6 months i can understand.

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Convergence is off on jvc av-56wp30


You will need to install a convergence repair kit which contains two Convergence ICs STK392-110 and then the associated resistors as usually a JVC will Need at least 1 or 2 of the resistors when the ICs fail. You can get the kit for your model at the following link which has the IC and all the resistors plus step by step detailed instructions on how to do the repair. This kit fits your model JVC
http://servicemanuals.vstore.ca/product_info.php/pName/av48wp30-convergence-repair-kit/cName/convergence-repair-kits

Jun 18, 2009 | JVC AV-56WP30 56" Rear Projection...

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JVC AV-56WP30 Convergence Problem


Hi

You have defective convergence correction amplifier IC replace the STK IC...

Thanks!

Jun 12, 2009 | JVC AV-56WP30 56" Rear Projection...

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I have a JVC AV-56WP74 that all of the sudden has a bow screen on top and bottom with green and purple tint with double picture. I have tried to fix the problem working with the convergence troubble...


You need to replace both convergence ICs they are STK392-110 you may want to get the resistor kit as your model will usually have a couple open resistors. You can get replacement ICs and resistors at the following link and they provide free instructions with pictures so you can easially do the repair your self.
Heres the link.
http://servicemanuals.vstore.ca/

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Convergence problem?


You will need to change the two convergence ICs they are both STK392-110 and you may also need the convergence resistor kit for your model. You can get replacement ICs and resistor kit at the following link and they provide free instalation instructions with pictures.
http://servicemanuals.vstore.ca/

Jul 31, 2008 | JVC AV-56WP30 56" Rear Projection...

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JVC I'Art. 65" projection TV. AV-65WP74 green screen sages real low.


you have bad convergence ic and or resistors
this repair usually requires a repair tech

Nov 12, 2007 | JVC AV-56WP30 56" Rear Projection...

3 Answers

JVC 56wp30 convergence


Your TV most likely a convergence failure. ( common problem )

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


  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • 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.

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.

Jul 30, 2007 | JVC AV-56WP30 56" Rear Projection...

1 Answer

Tv screen waves and is double


No. You have bad convergence output ic;s and probably at least 1 burnt resistor. This liely will have to be reconvergec in the servcie menu after the aprts are changed.

Jul 12, 2007 | JVC AV-56WP30 56" Rear Projection...

1 Answer

Jvc 56wp30


1st guess is bad convergence ic-either IC804 or IC805. Both are part #STK392-110. May be bad connections in convergence circuit, or open resistor(s) As for too much green, not sure, shouldn't be because of convergenece circuit, possibly green CRT screen voltage needs adjustment.

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