20 Most Recent JVC AV-48WP30 48" Rear Projection Television - Page 9 Questions & Answers

Ur convergence it dead,u know how tosolder?tries these websites for convergence kit.Tv repair World.com,Tv repair kits.

You can get the user manual for the AV48WP30 from www.tvrepairworld.com for free and they should also have the remote for that model. Just send them a email requesting the user manual and remote price they email the manual.

take off the front panel and unplug the convergance board up front just behinf panel if the set now comes on replace your con amps if not you have a power supply issue more than likly the con amps are bad

Try rebooting the dish network box hold down the power button on the box for 20 seconds then let it go. When it gets through rebooting see if your sound came back.

Go to website Understanding Sony Blinking Codes.

Yes, it does not happen often but you may have installed or got a new chip that is bad--you did apply heat sink compound to the new chips?

Check all the resistors carefully when you do this and double check all the soldering you do.

Let me know if you need help.

Rate this solution as I DO THIS HERE FOR FREE.

SD TECH

Hi,

The power supply has an automatic shutdown circuit that senses a shorted component and excessive current flow.

If you can access the convergence board and remove the plugs one at a time (red, blue or green) for the convergence output, the TV may start up and show a picture with the unplugged color misaligned.

This confirms a short in the convergence output. The convergence IC failure can show up as coloured outlines or power supply shutdown.

If this does not help, then there is some other short circuit in power or deflection circuits. You need a technician to troubleshoot HV or power problems.

Replacing the output amplifiers (located within the Convergence IC's) allows the pictures to line up correctly, and no more color outlines or power shutdown.

This is the most common fault in all makes of rear projection TVs.

Some models of TV require major disassembly and considerable shop/manufacturer's support to repair because of their design that causes other power supply or vertical deflection problems. The poorly designed products require a "bench" repair that can typically cost from $350 t0 $700.

Some TVs are designed for on-site repair and have more reliable circuit design that does not usually cause damage to other parts of the TV when convergence chips fail. The ones that usually allow reliable on-site repair are JVC, Samsung and Hitachi.

It is normal to have some resistors in the circuit burn up or increase in value from the heat (from 2.2 ohms to 5 or 10 ohms). These resistors must be replaced with the right value or the chip will fail again.

This is not a simple repair like changing batteries or a fuse. Reading through the other posts shows many that try and end up with bigger problems.

Your JVC uses STK 392-110 IC's. Misinformed people replace the IC's with other "new and improved" IC's, like STK 392-150. These are devices with different characteristics and require different value resistors in the circuit. Replacing with the STK 392-150 will cause overheating of the resistors and a damaged IC.

Please leave me comments, if you need further assistance
Rnj VINODKUMAR

I go more with the lamp, if it was the video card, your picture would be completely green or blue, but since what you have is the lack of image it's most probable your lamp is the one defective. You should also be aware that the lamps is powered by other components, if fixing the lamp does not solve your problem, you might have a faulty ballast, which is the board in charge of sending all the energy to the lamp so it can light up. http://www.discount-merchant.com/SearchResults.asp?Search=mitsubishi+lamps/?Click=48427

disconnect power to the convergence module if thump go away replace convergence ic's.

Your convergence IC's are bad. If your not doing the work it will probably cost in the neighbor hood of $250.00 for a service company to do. Not a major repair.

its most likely the flex converter module
its still worth getting fixed these sets have a great picture unless your just ready to replace it

This sounds like a convergence problem.

If model number is AV48WP30 go into the customer menu and select CONVERGENCE---if Red or Blue will not move in some direction one or both of the two STK-392-110 CHIPS this set uses for convergence is bad.

What happens is the convergence chips are black in color--about 2 1/2 inches wide X 1 1/2 inches tall with 18 pins each----the back of each is metal--when they are installed(each is mounted to a metal heatsink to keep it cool) they apply a white grease to transfer heat quickly----

After some years the grease dries out and one of the chips overheats and fails.

Not a real hard repair to do if you are handy and know how to solder----

Most shops are going to charge about 300 or more for this repair-----considering you can buy all the parts for under 25 dollars if you or someone you know can do it you can save a lot of money.

I can give you general instructions for this repair on this set.

I have repaired hundreds of sets with convergence troubles--very common problem.

Let me know if you have questions or need advice.

Regards, SD TECH

Here you go:
http://resources.jvc.com/Resources/00/00/91/LCT2063-001D-A.pdf

convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK-392-120 IC's and check the surrounding resistors. Shops usually charge between $200-$400 Be sure to vote/rate me if this helped Thanks!
See link for more detail
http://www.ehow.com/how_4575598_yourself-projection-tv-repair-convergence.html

Did you check all the low ohm bias resistors? You probably have a few that have changed value. They must be right on the money.

You can get the AV48WP30 convergence repair kit at www.tvrepairworld.com which has the parts and the CD with instructions for the repair. The kit cost less than having a TV shop to just come look at it

Tries the tv website it self might have video,or written intructions,U tube might have teaching video might not all tvs models.

you power supply is most likely the culprit. The internal capacitors do get overheated and faulty.

yes, I know what is wrong and there is a simple way for you to confirm this.

Have you ever seen a TV with just a white line across the screen from left to right? On a regular TV if this happens and you leave it on long enough it will burn the mark into the screen.

I suspect what you have is two of the picture tubes in this projection TV have a burn--it is caused because the set lost either horizontal or vertical sweep--picture either closed from left/right or top to bottom for a moment and then came back on instantly---burns a mark in one or more of the 3 tubes screens.

Way to confirm is simple--with the back cover removed cover each lens one at a time with the set turned on--be very careful when you do this not to touch anything else---

if you cover a lens and one of the marks goes away that tube is burnt----my guess is you are going to find at least 2 of the 3 tubes are burnt on the screen---

Problem here is the tube or tubes need to be replaced to correct this AND whatever caused this HAS TO BE FOUND ALSO OR IT WILL DO THE SAME THING TO THE NEW TUBES--


CONSIDERING the cost of two or more replacement tubes you are most likely better to buy a new TV---I have seen about 100 sets with just exactly what your are describing---It does not happen a lot--but once it happens the damage is permanent.

I know I am not giving you good news but I am sure from your description this is what has happened.


Sorry to give you bad news---see for yourself if you cover each lens one at a time--if you do this and the marks are gone you know exactly what has happened.

IF YOU HAVE ANY QUESTIONS OR NEED MORE INFORMATION--let me know here--I am here to help but cannot always give good news.

SD TECH