Question about JVC AV-56WP74 56" Rear Projection HDTV-Ready Television

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Jvc Thanks for the advice. Did you mean you can fix the board I already have? How hard is it to replace? Again thanks for the input

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If you have some basic soldering skills, this might be something you can do.
Search on google "how to solder and how to desolder" You tube seems to have very good instructional videos about it.
Good Luck.

Posted on Apr 12, 2008

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JVC HD-56G886 56 in. Rear Projection HDTV, Serial Number 11082188. Sound just suddenly went out. We purchased it 6 years old and had a 5 yr. warranty. Right, now we need it, it's not covered. We...


Hi Edwin Robinson,

First of all thank you for contacting Fixya.com regarding your TV problem.

You didn't mentioned if the symptoms remain the same in all inputs, this is to isolate the AV board from fault. If you are using HDMI connection, I would advice you to try the other inputs like input 1-3 at the rear panel and the Audio/Video input at the side panel using the RCA cables. If there's no sound after trying other inputs, then this is an indication that the fault is in the audio circuitry inside the TV.



The DIY steps that I would advice you is to check the resistance of the internal speakers using the multimeter set in resistance measurement. Good speakers will read between 6-8 ohms (for 8 ohms impedance) and you can hear a crackling sound upon testing.

How to test speakers








RCA Cable Connector

12_7_2011_12_26_44_am.jpg

If the speakers are in good condition then the fault either the supply voltage line of the audio circuitry from the power supply board, the audio processor on the main board or the sound output circuitry. This require technical skills because series of test are going to perform to isolate where the fault came from.


Immediate solution.

You can still watch your favorite channel and movies to your TV while the sound is playing through your home theater system or amplifier. Just hooked up the video to your TV terminal jack and the sound/audio to your home theater system or amplifier to bypass the sound from your TV.


Please let me know if you need further assistance.

Have a nice day and take care!

Kind Regards,

Jdvillanueva

Dec 06, 2011 | JVC HD-56G886 56" Rear Projection HDTV

4 Answers

Convergence IC"S


not unless you damaged the board, & theres no part of it have to be soldered and circuit is damaged, then it could be needed a new board.. but try to check if theres something to correct into your soldered parts and correct it again using a soldered pump to remove the bad solder.

thanks

May 02, 2008 | JVC AV-65WP74 Rear Projection Television

1 Answer

I have a JVC HD-52G786 and bought it in 2005. The other day we were watching it and the sound just went off. I checked all cables to make sure they didn't come unhooked but still now sound what should...


I presume you have no sound via the a/v inputs as well as cable or coax input.


We do factory work for many brands including JVC.

I remember one of these sets only a few months old with no audio, JVC exchanged it as the customer was angry (understandable). Ten minutes later we get a email and a call from JVC telling us set has been exchanged and they do NOT want the old one back---do whatever we want with it.

I had tested the set, following the audio circuit to a single board that supplies all audio--board was not real easy to get at and was on "backorder" meaning lots of them were bad and JVC was out.(which is why the set got exchanged).

I had the board ordered and about ten days later the replacement arrived--installed it (it was sandwiched between two other boards) and set worked perfectly===we ended up with a nearly new set (board wholesaled for about 80 dollars) and sold the set used with an extended warranty.

My point is if no audio from tuner or rear inputs it is a shop repair as most shops will not tackle this problem in this set IN THE HOME..

If you have audio from ANY input it may not be the set.

Let me know if you have questions, I am here to help you.

Regards, SD TECH

Jun 07, 2011 | JVC HD-52G786 52" Rear Projection HDTV

1 Answer

I have a green shadow outlining on pictures and wods.Help.. What does this mean?


Hi gomeryandgee,
If the symptom didn't cure by convergence adjustment through the remote control, this is an indication of faulty convergence board inside. You may replace the convergence IC's and some of the resistor around because its already gone bad
http://www.tvrepairworld.com/mitsubishi_repair_kits. You may also replace the entire convergence board for your convenient. If the board replaced with new one, your unit will back to normal again. Also, consider bad solder joints in that area, it will do the same symptom like what you've encountered right now. Find it first and re-solder. If you don't have necessary tools and test instrument and can't do the job yourself, I would advice you to look for a qualified technician to isolate the problem.

Hope I helped you.
Have a nice day!
Thanks for using Fixya.

Mar 15, 2011 | Mitsubishi WS-65809 65" Rear Projection...

3 Answers

JVC AV-65WP74the picture projectscuved in the middle of the scren


Hi,
This kind of picture problem is due to failure of convergence out ICs, please replace convergence out ICs in tv to get it fixed.
If you are handy with electronics stuff repair and can replace parts in circuit board with proper tools then can replace above said ICs by yourself or ask local tv tech to repair your tv.
Thanks.

Mar 15, 2010 | JVC AV-65WP74 Rear Projection Television

1 Answer

I'm looking for a replacement convergence board for my Jvc AV48WP74 tv. SSB-5068A-M2 I've replaced the STK392-150 ic's already and after a week they failed again. JVC does not return my calls.


A Google search for the board part number returned several sources. Here's one. You should also check the values of resistors around the STK's. When the IC's fail, the resistors can change value which can cause the repeat failure you're experiencing.

Sep 24, 2009 | JVC AV-48WP74 48" Rear Projection...

1 Answer

I have double blurry vision with green and purple/red splashes on all inputs (ghostlike)


This is a very common problem. If you want to fix this yourself you will need to be able to solder, but other than that its a very easy fix. Both the convergence output ic's need to be replaced (PN STK392-110). If you have a repairman do this for you it will run $300-$500 to repair. Let me know if you want to fix this yourself and i will assist you further.

Thanks
Tim Nolan

Sep 24, 2008 | JVC AV-48WP30 48" Rear Projection...

9 Answers

HDMI no longer working


JVC AV-48P575 HDMI reset procedure:

1. Unplug HDMI cable from tv.
2. Unplug the tv.
3. Remove the rear (low) back cover.
4. Find the 6 pins on the board of the HDMI module and shortcut the pins no.1 and no.2 using a jumper(i use an old hard drive jumper).That's the higher to pins if you can't see the number.
5. Put back the rear cover.
6. Plug the tv.
7. Turn on the tv.
8. Unplug the tv(without tunrning it off).
9. Remove the back cover.
10. Remove the jumper on the pins 1 and 2.
11. Put back the rear cover.
12. Plug the tv and you're done.

Jan 04, 2008 | JVC AV-48P575 48" Rear Projection...

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...

1 Answer

Composite and s-video inputs stopped working


You may have shifted the input board a little while replaceing the IC's. Double check every plug and connector, not just by visuale inspection, but by going and removing and replacing every connector. I have had problems like this in the pasy and have learned the hard way, everything is not as it looks. Good Luck

Jun 04, 2007 | Philips 60PP9202 60" Rear Projection...

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