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

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Convergence chips I'll just start by saying I'm no TV repair man, but I can solder with the best of them. I have recently started repairing broken big screen TVs for fun. I have replaced convergence chips in 4 different TVs, all different models. Two TVs worked just fine and the other two smoked resistors next to the convergence chips. My question is: What am I doing wrong? Is this typical? Thank you, Heath

Posted by Heath Urbanczyk on

  • Anonymous Feb 16, 2008

    I have a convergence problem and need to know where the board is located on a JVC AV48WP30

  • Anonymous Mar 26, 2014

    I am using my old vcr to send an analogue signal to other TVs in the house - but the output signal is clashing with the aerial signal and causing snowy images on the other Tvs



3 Answers


The convergence board for the JVC AV48WP30 is located a the front of the TV. Remove the grill from the front of the TV. I believe you will find it on the left hand side. The convergence ICs (STK392-110) are located on the black heat sinks. I replaced my ICs with STK392-180 and blew up my board. The replacement board from is $200.00. If you are going to replace your ICs I suggest replacing them with the original part numbers. I hope this helps you.


Posted on Feb 17, 2008



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I need to know where the convergence board is located ?

Posted on Feb 16, 2008


Willie Howell

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The convergence IC or in a sense ,amplifiers and the resistor are output resistors... if they are burning up the current going through them is spiking too high... TO me this is an indication that the "convegence yokes" are shorted. These are coils around the tubes that control convergence. I would suspect maybe that these are shorted to ground somehow. This is my first guess for this problem

Posted on Feb 11, 2008

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If you don't have electronic skills and no skills with soldering, please don't start. You can damage more than a repair engineer can fix. You could check on ifixit, if they already opened your TV. But please be aware even flat screen TVs do have dangerous voltages. So don't risk your life for a "simple" repair.
iFixit The free repair manual iFixit

Dec 20, 2014 | Televison & Video

1 Answer

I adjust the convergance cross but there is only one the moves. how do i get the rest to adjust?

If you are not able to adjust one of the Red, Blue colors you may have an open resistor(s) or one of the convergence ICs is bad.
One of the ICs and a bunch of resistors can also go bad at the same time, and it is recommended to replace both ICs even if only one color circuit is bad.
There are convergence kits which include resistors and two STK392-*** ICs available for certain TV sets.
To do the repair you need either the complete kit or find out which resistors are bad and the 2 big ICs STK392-*** the last *** 3 digits could be 110,120, 150 etc..
You de solder and remove the STK ICs and resistors if they need to be replace, install and solder the new parts, adjust the convergence
Doing this repair can be very difficult in some TVs it all depends on the layout and design of the TV and how hard to get to the convergence circuit. I have seen experienced Technicians making mistakes and even damaging the TV.
I have heard a non TV techs did this kind of repair and due, to the 1000s Volts danger of the high voltage inside the TV I suggest, to hire a TV man to do the repair can go from $200 and up.

I wish you the best..

Nour Sabre

Nov 15, 2011 | Panasonic Televison & Video

1 Answer

Someone dropped it and screen looks cracked when it comes on...wondered if it was worth repairing

No,not worth repairing and it is impossible to get the tv LCD screen panel as refurbish as part and buy it from the outside if u can find it at all 50/50 it is garbage LCD screen panel u are buying.Only the tvs Corporations themselves,the LCD screen panel are 100% good.But it is 90% importamt to the tv functions.They'll charges u the same as a new tv.Sorry tvs with broken LCD screen panel are worth as for PCB boards as salvages tvs for it electronic boards only now.

Aug 25, 2011 | Samsung 320MXn2 32 in LCD TV

1 Answer

If the screen is cracked, can it be fixed?

No,the tv LCD screen panel itself have to replaced,not possible to be replaced the tv LCD screen panel cheap or the tv it is now worth as a whole tv anymore.Because the tv LCD screen panel are very important to the tv funsctions 90% of the tv cost and it is very limited in productions by the tvs corporations and only can find and buy it from them.They'll sell it to but they charges the tv new LCD screen panel the same prices as a new tv.Sorry any tvs have a damages or a broken tv LCD screen panels,tvs it is not worth as a whole tv anymore,now it is only worth as a salvages tvs for it electronic components boards for as parts for repairs for other tvs only now.

Aug 16, 2011 | Televison & Video

2 Answers

I have a 37" Panasonic plasma TV which I've

The tv Plasma screen panel it is 90% of the tv and it is very important to the functions for the tv watching experience.The tvs Plasma screen panels are exspensive and very limited in production by the tvs corporations only and can buy it from them only too,they'll sell the tv Plasma screen panel to u,but they'll charges u the same as a new tv.Sorry tv now only worth as a salvage tv for it eclectronic boards to used for it with other tvs only now,if the tv screen panel is broken or cracks.

May 26, 2011 | Panasonic TX37LZD80 37 in. LCD TV TV/HD...

1 Answer

I got a cracked screen. I disassembled it and have the broken screen in hand cant find this part anywhere on the internet

U are out of luck,because the tvs LCD screen panels are 90% important tvs and it is very limited in productions by the tvs corporations only.The tvs corporations they'll sell the tvs LCD screen panels to u.But they'll charges u same as a new tv.Sorry ur tv have broken or damages LCD screen panel now,only can be used as salvages tv for it electronic boards only now.

May 04, 2011 | Samsung LN-R409D 40 in. LCD Television

1 Answer

Toshiba big screen The tv is like double exposed . I have a toshiba big screen tv and I have double images in red and green. How do I fix this problem?

This is likely your convergence ICs(chips). If you can bump it then the ICs (chips) are still ok, it just needs resoldering.
my company charges $300-400 for the full repair (replacing ICs, full realignment plus cleaning)
if you can find a company that will resolder for you, it could cost $100-200 maybe. if you are a handy person with soldering skills, you could repair yourself. i can instruct if needed, but convergence IC soldering requires decent soldering skills. you will find the ICs on the largest heatsink in the tv. the part number starts with STK. if you replace them, check the resistors in front of them and replace accordingly. most toshiba will blow up to 3 fuses (f850, f851, f852)

Dec 08, 2008 | Televison & Video

1 Answer

Mitsubushi rear projection 50 inch bought in 2001

I would say the last repair knocked a solder joint loose in the vertical circuit. This is a common problem when moving rear projection circuits boards or the whole tv. I have had customers move their TV from one room to another for what ever reason and when they moved it back it wouldn't work right. These sets get real hot and destroys the solder joints. Is it worth fixing??? Only you and your wallet can decide that and of course the local service man and what he charges.

Dec 15, 2007 | Mitsubishi VS-60707 60" Rear Projection...

1 Answer

Screen Problem

I have been trying to fix one of these tvs and found out from a repair man that the lower half going blank means a problem with the lower buffer. and that is also what the manual I downloaded says.
have you checked that?

Dec 07, 2007 | Samsung HP-R4262 42 in. Plasma Television

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