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

1 Answer

So.. Would the original or replacement IC be more likely to go bad again?

The replacement part is the exact part no. as the original (looks identical) so that being said would it make more sense that the original finally went bad or that the replacement went bad? Does anyone have a schematic for this unit that could tell me or send me?

Thanks again,
Tony

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  • Tony S Mar 13, 2008

    Thanks for the info.. It dawned on me from my old elecronic tech days that I could isolate the bad IC by running the unit and checking to see which one was overheating or not heating up at all. It was right on with your information. IC-804 went to over 100 degrees within 60 seconds of turning on the set (and RED is the color that is off). IC-805 was only luke warm in the same time frame.



    Thanks,

    Tony

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  • JVC Master
  • 8,617 Answers

All the ics look identical even right down to the STK numbers. However if you didnt get the part from a authorizes Samsung vendor, chances are you got one of the cheaper made ICs. I will search for a service manual for your model. The other site I work as a tech on may have your service manual. I will check and post a link if they do.

Posted on Mar 13, 2008

  • Sonny Berry
    Sonny Berry Mar 13, 2008

    The other site has the two part service manual and schematics manual for your model. I looked it up. IC-804 controls the red convergence STK392-110 . If you want the service manual and schematics manual for your set let me know and i will post a link for you. Its two parts and cost 24.99 and they will email it to you.

  • Sonny Berry
    Sonny Berry Mar 13, 2008

    Dont mention it, glad I could help.

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3 Answers

Colored lines at top and bottom when tv comes on and seeing double vision in different colors at all times


If your tv is not a DLP the problem is in the convergence, try to adjust it using your original remote control go to the setting menu then to the convergence section. Adjust the red and blue convergence. you should move the red and the blue in up, down and left, right if this color does not move far enough your convergence IC is already defective. Replacing this convergence IC will solve the problem. In locating this convergence IC you should remove the back cover of your unit but be sure to unplug it before doing this. This convergence IC is attached to a large aluminum plate, it is the heat sink, and it has a marking of stk- ### followed by numbers. You can try to pull it out using a soldering iron and soldering pump but be careful you may damage the board and cause much problem to your unit. Or you can contact a technician to do it for you and save you from stress good day and best regards.

Aug 28, 2011 | RCA Projection Televisions

1 Answer

What is the best IC replacement for original IC part# STK393-110?


Sayo makes the best IC's, don't just settle for the cheap ones. I have see this ic for as low as $5.00 on the internet.

I would also advise that the convergence IC’s be OEM or better, just because they are cheap does not mean that they are a good deal. I have seen the cheap IC’s fail after a short time, even though they look exactly like the OEM IC’s. I think that the bottom line is that you will get what you pay for when it comes to the parts.

You can try http://www.tvrepairkits.com/ they do carry OEM or better parts.

I hope this information allows you to resolve this issue.
If you need further assistance please comment to this post and I will try to help you further.
asnowman

Oct 13, 2009 | Mitsubishi WS-65513 65" Rear Projection...

1 Answer

Televison showing Yellow and Blue shadows


Your symptom sounds like a damaged convergence IC.

There are two and large IC’s that control the convergence in a big screen set. They are secured to a very large aluminum heat sink. They will have a part number stamped on them that will start with an STKXXX-XXX, like STK392-110, and they are located on the signal board (on the left as you look into the back of the set).

Along with the convergence IC’s there will also be some associated components that will need to be replaced as well. There are some resistors that are part of the convergence circuit that will be open and need to be replaced. Most likely these will appear charred in the center. If you have an Ohm Meter or a DVM, check all the resistors that are close to the IC’s and you should be looking for either ones that have opened or have changed values.
There are also two resistors on the front of the board located in the middle that are fusible link resistors, these should be checked for opens and replaced if they are found so.

I would suggest that you contact a service center in your area for a complete diagnosis and repair, as this type of repair can get a little tricky. But if you want to repair the set yourself, just remember to be careful. The capacitors and CRT’s can hold a charge and may shock you.


If one of the convergence IC’s are found to be bad, I would replace them both, if one has gone bad the other may go soon. I usually order my parts from Andrews Electronics in California; they will have the OEM components that you will need.
Their site is http://www.andrewselectronics.com/welcome.aspx
And their phone number is a 24-Hour Order Desk: (800) 274-4666
I recommend the phone order so you can talk to the person about the different types of IC’s that are available.

I would also advise that the convergence IC’s be OEM or better, just because they are cheap does not mean that they are a good deal. I have seen the cheap IC’s fail after a short time, even though they look exactly like the OEM IC’s. I think that the bottom line is that you will get what you pay for when it comes to the parts.

You can also try http://www.tvrepairkits.com/ , I have not tried them yet, but they do carry OEM or better parts.

I hope this information allows you to resolve this issue.
If you need any further assistance please respond to this post.
asnowman

Sep 22, 2009 | Panasonic PT-47WX49 47" Rear Projection...

1 Answer

Can't get the tv focus


Your symptom sounds like a damaged convergence IC.

There are two and large IC’s that control the convergence in a big screen set. They are secured to a very large aluminum heat sink. They will have a part number stamped on them that will start with an STKXXX-XXX, like STK392-110, and they are located on the signal board (on the left as you look into the back of the set).

What happens in the Panasonic set is that the convergence IC’s will short and cause the power supply to shut down from the overload of current. Along with the convergence IC’s there will also be some associated components that will need to be replaced as well. There are some resistors that are part of the convergence circuit that will be open and need to be replaced. Most likely these will appear charred in the center. If you have an Ohm Meter or a DVM, check all the resistors that are close to the IC’s and you should be looking for either ones that have opened or have changed values.
There are also two resistors on the front of the board located in the middle that are fusible link resistors, these should be checked for opens and replaced if they are found so.

I would suggest that you contact a service center in your area for a complete diagnosis and repair, as this type of repair can get a little tricky. But if you want to repair the set yourself, just remember to be careful. The capacitors and CRT’s can hold a charge and may shock you.


If one of the convergence IC’s are found to be bad, I would replace them both, if one has gone bad the other may go soon. I usually order my parts from Andrews Electronics in California, they will have the OEM components that you will need.
Their site is http://www.andrewselectronics.com/welcome.aspx
And their phone number is a 24-Hour Order Desk: (800) 274-4666
I recommend the phone order so you can talk to the person about the different types of IC’s that are available.

I would also advise that the convergence IC’s be OEM or better, just because they are cheap does not mean that they are a good deal. I have seen the cheap IC’s fail after a short time, even though they look exactly like the OEM IC’s. I think that the bottom line is that you will get what you pay for when it comes to the parts.

You can also try http://www.tvrepairkits.com/ , I have not tried them yet, but they do carry OEM or better parts.

As for the remote you can get a replacement or an equivelent at www.remotes.com


I hope this information allows you to resolve this issue.
If I have helped you, please help me, and rate this suggestion the highest FixYa rating. (Two Thumbs Up)
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If you need further assistance please comment to this post and I will try to help you further.

Sep 09, 2009 | Panasonic PT-47WX49 47" Rear Projection...

1 Answer

From the moment the tv is turned on the horizontal lines appear.It seems to get slightly better as the tv warms up and once in awhile it actually clears up for just a minute or two,then goes back to the...


with the original Mitsubishi remote go into the customer menu and to the Convergence; there will be instructions on screen telling you what to do; if either color does not adjust---you have a bad convergence Ic; the WS-55511 uses a single convergence IC-----it is a STK-393-110; I have seen a lot of them bad and intermittantly bad---someone needs to replace and then take the set into the Technical menu and adjust the convergence there(it is accessed with the remote by entering a number code for this model--any tech should know and be able to fix this problem in your home----I do a lot of these sets with this exact problem. Hope this was helpful.

Aug 11, 2009 | Mitsubishi WS-55511 55" Rear Projection...

1 Answer

How to remove horizontal lines for dvd player


This is a common problem and is either bad connections at the vertical Ic or a defective IC. Look for a small flat Ic attached to a heat sink with 9 pins or so. It should be marked LA7837 or similar. Resolder the pins and try again. If that fails, replace the chip. That should fix it. You may also need to replace some capacitors in the same circuit if the picture lookes stretched or otherwise off. The Ic should be labeled on the board as ICxyy. Capacitors in the same circuit will have the designation Cxyy. Change the Caps that have the same x designation.

Nov 07, 2008 | Projection Televisions

1 Answer

JVC AV-48WP30 will not give a picture


Replace the convergence IC`s again using original Sanyo chips (STK 392-110 or STK 392-180). Make sure to use plenty of heat sink compound. Coat the entire back side of the chips. Also look to see if any of the low ohm resistors are burned. A shorted chip will cause the thumping sound and the set will shutdown. I am guessing that you used generic IC`s as a replacement. They are cheap and the leggs fall off when you apply too much heat during soldering. Dont wory about the CRT driver or the deflection board, they are probably fine.

Dec 12, 2007 | JVC AV-48WP30 48" Rear Projection...

3 Answers

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Use PANASONIC STK's.They are expensive,but they hold up!Safe,durable repairs require OEM or BETTER quality replacement parts.

Sep 27, 2007 | Samsung HCM4215W 42" Rear Projection...

1 Answer

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Compare your rgb voltages and your cathode voltages(green, red, blue) and also access your service mode settings. It might not be the STK-392-150 that is defective.

Sep 26, 2007 | Sony KP-43T90 43" Rear Projection...

1 Answer

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Sounds like you have a blue foldover in the convergence. Since tv has been worked on it could be bad ic, maybe not original, generic. I would say if you can open set and look in, look for the blue it should be marked. look for a loose connection. If you can have someone to gently tap around that blue amp and see if it moves are go away, it might be a simple loose connection and needs soldering. If not then my have to change ic again. Becareful cause set would need to be on to really check. Hope this helps.

Aug 15, 2007 | Panasonic PT-47WX53 47" Rear Projection...

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