JVC AV-48WP74 48 in. Rear Projection HDTV-Ready Television
Problem for JVC AV-48WP74 48 in. Rear Projection HDTV-Ready Television

JVC AV-48WP74 convergence problem




MY tv has a green swoop at the top. The colors will not converge and it has a double picture due to the convergence problem I think. Any help on this would be appreciated. Thank you.

Same Problem

Feb 10, 2009

-   The picture is ghosting the colors and the faces.-   Guest

Feb 08, 2009

-   I also have a green bowing at the top and bottom of the screen. -   ackdhl

Jan 04, 2009

-   theres a shadow in the picture and its hard for me to adjust because the remote control was missing.-   alihups

Dec 21, 2008

-   I replaced the ic 110 with 150's now the tv made a thump sound and the thermal over current switch is clicking HELP PLEASE-   badge142

Nov 10, 2008

-   the tv is showing a green line at the top of the tv.-   lilsexyblack

Best Solution

posted on Aug 18, 2007
Very Helpful)

acesinalbq

Rank: Guide 
Rating: 89%, 21 votes
I had a problem with my TV colors not lining up. One day I turned it on and the green was out of wack. I checked this message board and replaced the STK chips, bad soldering and all led to me just giving up on that and buying a whole new Convergence Board ($185). I replaced the missing silver box on the new board and I just plugged this in and though now my Green lines up okay, my red is out of whack. Is there something I am doing wrong?
Can anyone help me? Did i miss a step? Frustrated......Bruce
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Solution #2

posted on May 30, 2006
Very Helpful)

network54

Rank: Apprentice 
Rating: 0%, 0 votes
Heres what I can tell you, If super focus does not adjust this the JVC service site says to check Q810 and D504 hope this helps...tom
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Solution #3

posted on Feb 24, 2008
Helpful)

petraman7

Rank: Guru 
Rating: 86%, 294 votes
If you can't adjust it yourself, get a qualified tech to open it up and replace the convergence amps
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Solution #4

posted on Aug 14, 2008
Helpful)

Nomad502

Rank: Apprentice 
Rating: 85%, 1 votes
Would you believe somebody tossed one of these out. I took it home and found the red out of whack. Upon inspection I found one of the 2.2ω resistors brown and reading open. I would like to replace it but need to know the specs on it as well as a source. (Radio Shack doesn't have it)
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Solution #5

posted on Aug 29, 2007
Somewhat Helpful)

Guest

Rank: Apprentice 
Rating: 0%, 0 votes
You need to go through the convergance process in set up.

Solution #6

posted on Nov 10, 2008
Somewhat Helpful)

lilsexyblack

Rank: Apprentice 
Rating: 75%, 1 votes
i need to know how to fix the green line that is showin on my tv set.
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Solution #7

posted on Nov 01, 2009
Not Rated)

joeof39

Rank: Apprentice 
Rating: 0%, 0 votes
I have a JVC AV-48WP74 that I repaired a few days a go... ghostly green wavy lines which is a convergence problem...it does not matter which of the three colours green,red,and ,or blue...it's all the same problem...there are 2 Identical big chips(IC,Transistors)that need to be replaced...no:STK 392-110 measure 2.5 x1.250 inches...they are installed vertically on 2 heat-sinks on a separate board close towards the front left of the tv if your facing the back of the tv with the brown panel removed...and the ac cord...there are 6 harnesses that must be removed from the pc -board...mark the harnesses with masking tape around the wires so they can be reinstalled in the right connections...there are white connectors at the end of the wires...they are female and male connectors...the first 4 get unplugged from the board...5 is unplugged from the other end of the harness and 6 is mounted on the right vertical of the board and is unplugged on the board...there are 4 plastic clips in front of the board-tv and 4 clips that the board slides into...be patient and careful because the board is flexible...once the board is out you can work on it...if you have experience with soldering electronic components this is an easy fix...if not I advise you to practice on a small soldering kit from your local electronics shop...there are 13 metal-film 2-watt resistors mounted in front of the chips which have to be looked and measured with a meter for their resistance value...if they all look good without any brown burn marks on them...then they do not have to be replaced they supply the chips with input and output voltages...there are 2 screws holding each chip which is mouted on each heat-sink...use solder wick or a solder-****** to remove the solder from the board there are 18 pins for each stk 392-110 chip...make sure to apply heat-sink compound on the chips before they are reinstalled on the heat-sinks...screw the chips first then solder them...it is very important to apply heat-sink compound between the chips and the heat-sinks bacause these chips run pretty hot...the 2 chips cost me 50 dollars...be careful the right side of the tv is high-voltage use caution...I've had my JVC for 4 years now...after I installed the board and the harnesses back and rechecked everything...turn it on and used the auto convergence mode in the menu...perfect-picture...I hope this helps...watch tv...
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Solution #8

posted on Aug 28, 2008
Not Rated)

jjucius

Rank: Apprentice 
Rating: 0%, 0 votes
Replace the chips and resistors while your in there, and a sugeston, insted of sodering the chips in solder inline sockets in then insert the chips so if they go out again just unbolt from heatsink and pull the chips out, heres a place to get the chips
http://www.electronix.com/catalog/advanced_search_result.php?ELECTRONIX_CATALOG_SESSID=845bd1c0577a04536d7540622dfd42b3&keywords=STK392-120&x=7&y=6
just type in the part number.
Joe

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Solution #9

posted on Jun 08, 2008
Not Rated)

bijudada

Rank: Master 
Rating: 81%, 7 votes
replace the both STK
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13 Other Users Have The Same Problem - Continued

Comment by Guest, posted on Sep 03, 2008

I have the same problem Green swoop and unable to perform convergence and I was told it would cost 3-4 hundred dollars min. to get it fixed. I would like to try and fix it my self before puting out that kind of money. I would like to know where I can get parts as well as what parts I should replace.The darn set does not have that many hrs on it.

Comment by Nomad502, posted on Aug 14, 2008

Would you believe that somebody tossed one of these out? I took it home, plugged it in and found the red out of whack. I will be ordering the IC's (probably the 150's) but first I want to replace a resistor that is obviously bad. It is brown and reads open. My problem is, I don't know what type resistor it is. All I know is that it's a 2.2ω, 2W. Of course, my local Radio Shack doesn't have it. Can somebody give me the specs on this, and possibly a source? Thanks!

Comment by Guest, posted on Jun 25, 2008

red giving double vision green swoop at top

Comment by Guest, posted on May 01, 2008

my tv has double picture

Comment by johnx9n, posted on Apr 17, 2008

my red will not line up ive tried every thing on this tv i have even taking the front panel off and tried to fix internally but that just made it wourse is there a way to reset this tvs after you mess them up or am i just screwed?

JVC AV-48WP74 convergence problem

Comment by Guest, posted on Feb 08, 2008

my picture and words are showing double not in focus

Comment by pablosoo, posted on Jan 31, 2008

colors are mismatched

Comment by jaden51607, posted on Nov 27, 2007

there is a purple swoop at the top of the screen and colors aren't matching up....jason

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