20 Most Recent JVC AV-48WP74 48" Rear Projection HDTV-Ready Television - Page 3 Questions & Answers

the blinking light signifies to a repair technician with capacitors or circuits are having an issue they can diagnose the problem via the amount of blinks in between pauses however it will require a technician and some specific tools and schematics to fix and it may be cheaper if its no longer under warranty to purchase a new one


Hope this helped
Robb

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 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

I WOULD DOUBT THE BOARD IS AVAILABLE and you if you have convergence problems can have it repaired for 1/10th of what it would cost.

Only Two IC's and or one or more resistors fail on this board.

It is easy to actually get the board out of the set.

See attached photos of the board:

It uses two of the STK-392-110 chips ( A pair can be purchased on EBAY for about 12 dollars!) If one or more of the resistors are bad they are easy to locate and replace---generic part and each part on this board has a location number printed next to it.

Less than 20 dollars in parts, about 40 minutes to remove board, replace parts and put back--all you will need if it works is the JVC remote to use to adjust convergence.

If this told you something (or the photos helped you) rate this solution as, very helpful as I do this here for free.

Regards, SD TECH


view of board from back removed from set







view of board removed from set from front





view of back side of board--two stk-392-110 chips and in front of them the protection resistors

Must know basic soldering and have tools like soldering iron,a desoldering pump or desoldering witchs to replaced parts on the tv convergencce board.U have none of these tools devices and never solder bsfore,better hire the tv tech. to do the job.Cost estimate 300-350 for parts and labors.Tries wesite like Tvrepairworld.com,Tvrepairkits.com to buy a whole convergence kit,to do it ur self,if u can?

Classic sign of failed convergence. You can get the JVC AV48WP74 Convergence repair kit from www.tvrepairworld.com which contains the two IC's and associated resistors plus has the CD with detailed repair instructions.

Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

This is a very common failure on these projection sets and a fairly simple DIY fix. All projeciton sets including Samsung, RCA, Sony, Philip Magnavox, Panasonic, Pioneer, Akai, GE, JVC, Toshiba, and others at some point will have the same problem.

Common Symptoms include....

• 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.
• TV shuts off after powering on. Power light will blink. TV may also make a chirping noise.

Here are some photos of convergence problems.






Here is a quick test....

Using your original remote go-to the settings menu then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move RED and BLUE in all directions - up, down, left, and right. And you should be able to get the grid straight.

If you can't move them in all directions or cant move them far enough your convergence chips are bad and should be replaced. This is a common problem.

Note: If you TV has as flash focus or magic focus button only try pressing the button. If it fails to fix the convergence your need to fix it. See below for a fix

CONVERGENCE SOLUTION

You will need to replace the convergence chips and possibly some convergence resistors and pico fuses.
This is a a fairly easy DIY job if you are handy and can follow directions. You can get complete repair kits from TvRepairKits.com or click here. They have put together DIY repair kits that include the OEM parts and step by step photo instructions for each repair. If you are not handy or can't follow directions we would suggest calling a shop.

I have a problem with JVC Plasma TV having a split-screen and i can't get rid of it. Last night an on-line guy told me how to do it with a remote...but we don't have an OEM remote so the reset button does not work(neither does the OK button) and then another guy told us to push the reset buittton on the back twice. Well, we got the TV down and can't find the reset button...or is it on the back of the TV turner?
Does anyone out their have another suggestion?
btw, the cover of the TV looks like it has about 40 screws on the back..

You have a convergence problem. I have a tip at http://www.fixya.com/support/r4220499-change_projection_tv_convergence_ics which explains the problem, how to repair it and where to get the parts. Let me know if you need more help.

Thanks for using FixYa and for the generous rating.

hardrocko

Install the JVC repair kit called AV48wp74 convergence repair kit available from www.tvrepairworld.com the kit contains the parts and step by step instructions.

Projection TV sets have two very common problems listed below.

Problem #1) Convergence


These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired. Convergence problems are very common on all Projection TV sets including Sony, Samsung,JVC,Philip Magnavox,Panasonic,Akai,Pioneer, Hitachi,Mitsubishi,Zenith and others.
You can get more information and a DIY convergenece repair kit with instructions from the link below.

Here are some of the most common problems with these sets...

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped
*No Audio/Video - TV Shuts down - May also make a constant chirping sound

Problem #2 - Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

*Dull looking picture
*White looking picture
*Halos around objects
*Red/Orange looking picture

You can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

your tech may not have found the underlying fault that caused this problem for you to begin with, your tech may be the best solution for you as they already know the fault and he must diagnose a little further into the circuit to find out why the component is failing for a 2nd time.

These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired. Convergence problems are very common on all Projection TV sets including Sony, Samsung,JVC,Philip Magnavox,Panasonic,Akai,Pioneer, Hitachi,Mitsubishi,Zenith and others.
You can get more information and a DIY convergenece repair kit with instructions from the link below.

Here are some of the most common problems with these sets...

Problem #1) Convergence

Yours may have one or more of the following symptoms...

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped
*No Audio/Video - TV Shuts down - May also make a constant chirping sound

Problem #2 - Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

*Dull looking picture
*White looking picture
*Halos around objects
*Red/Orange looking picture

You can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Make sure you bought genuine Sanyo chips...if not goto www.TvRepairKits.com and get theirs.

In the menu do the auto convergence. If still bad replace the convergence ics. Also check resistors around the ics. You can remove the front grill and access the conv board from the front. Small board on the right. It popps out.

This is a common problem. Its called a convergence failure.

Problem #1) Convergence

Symptoms:

• Screen Looks 3D
• Colors wont align
• Screen may look distorted

Problem #2 CRT Fluid has clouded over. Symtoms

• Dull looking video
• White looking video
• Halos around objects
• Red/Orange looking video

You can see some examples and find a fix here...

http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

This is a common problem. Its called a convergence failure.

Problem #1) Convergence

Symptoms:

• Screen Looks 3D
• Colors wont align
• Video may look distorted

Problem #2 CRT Fluid has clouded over. Symtoms

• Dull looking video
• White looking video
• Halos around objects
• Red/Orange looking video

You can see some examples and find a fix here...

http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

2 Convergence ICS is dead,must replaced.Some it resistors well need it replaced too.Must know how to solders?Buy a convergence kit at Tv repair World.com,Tvrepairkits.com to repair it ur self.The Shop will cost u $300 dallors for parts,and labors.

Yes you can get the repair kit for that model at www.tvrepairworld.com and the kit contains the parts and the CD with detailed instructions.

You should be able to go into the menu using the front panel and turn off closed captioning.
Here's a link to the owners manual which may help you.
http://resources.jvc.com/Resources/00/00/96/52105ien.pdf

Convergence ICs have failed. You can get the convergence repair kit for your model JVC at www.tvrepairworld.com the kit contains both ICs the associated resistors and the CD with detailed instructions.