Question about JVC AV-56WP30 56" Rear Projection Television

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JVC AV-56WP30 56 black screen blue light on no response

Hello about six months ago my IC chips went bad and was causing waves in my screen. I replaced them and the tv looked great. I was told to use the 150's instead of the 110's (the white printed # on the IC chips). Everything worked fine. Now all of a sudden my tv is black and all that happens is the blue power light stays on. Even if I unplug it and plug it in again then the light just comes on its self and no tv or sound. The remote or the tv buttons dont do anything. Please any help is greatly appreciated. Nick

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Make sure your front panel lock in your menu is not lock if is then unlock it cause it will lock everything on the tv in front and can't move anything

Posted on Jul 27, 2008

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Kuds30ivbl4


Check number six in diagram for continuity it is a thermal fuse and may of blown out.
25571846-xxcgpmvxnqk1u1vs0ulxqbhq-2-0.jpg

Mar 15, 2015 | Dishwashers

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Blue lines arc down from the top of the screen on JVC IART TV model number AV-65WP74. Is it worth fixing? Thanks


Yes it is worth fixing . You can fix it yourself for about $ 21 . You need to replace the convergence I.C. chips , The part # is STK392-310 . you need two of them . You can get them from bluestar-online.com . They are about 6 bucks a piece and about 10 for shipping .

May 13, 2010 | JVC AV-65WP74 Rear Projection Television

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Red lines all over the screen


this set(AV56wp74) was first made in 2003----if you use the remote for the set and go into the customer menu---select convergence----once there see if the red and blue will move left/right and up/down----if either color will not move in any one of these directions----you have a bad convergence IC--this set uses 2 of the STK-392-110 output ic chips---both need to be replaced and the set adjusted with the original JVC remote control. I hope this has been helpful.

Aug 11, 2009 | JVC AV-56WP74 56" Rear Projection...

1 Answer

Purple and Green Streaks


If lcd set the issue may be with the T con board which is responsible for video and any aberrations that you see on screen.

Mar 24, 2017 | JVC AV-48WP30 48" Rear Projection...

1 Answer

The only thing that happens is the red power light is flashing


The Vertical output ic is bad la7832 also has an open resistor in power supply off of pin 7 the ic.
Root cause is probably the zener diode next to the IC itself MTZJ75

Dec 23, 2008 | JVC AV-27720 27" TV

1 Answer

Convergence problem wiht jvc av 48wp30


Bad chips...There are a ton of cheap fakes out there....Or bad resistor...

Projection TV sets have several common problems listed below.

Problem #1) Convergence

Symptoms:

  • Screen Looks 3-D
  • Colors wont align
  • Screen may look distorted
  • No Audio/Video - makes a chirping sound.
Example Photo:
5f6e85c.jpg
Problem #2 CRT Fluid has clouded over.

Symptoms


  • Dull Video, Washed out
  • White/Bright looking video
  • Halos around objects
  • Red/Orange looking
Example Photo:
ee1ca68.jpg

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

bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Sep 29, 2008 | JVC AV-48WP30 48" Rear Projection...

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Double Vision ...w/waves on top/bottom too much green.


1024x768 Normal 0 Convergence


When A REAR PROJECTION TV has coloured outlines or a 3D image the Convergence Circuits most likely need attention.

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

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 may 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.

If you are in Calgary, I can help. If not, get someone that has experience working on your JVC. My website is below with some costs and explanation.

calgaryconvergencerepair.weebly.com/convergence-explanation.html

Good Luck,

Easyab

Jun 05, 2008 | JVC AV-56WP74 56" Rear Projection...

1 Answer

1.5 days after replacing both IC chips the blue started ghosting again and then...


The biggest problem you stated yourself. You bought aftermarket type IC's. You should have been smarter and purchased the correct IC's for the set. All IC's are not alike, even with the same number on them. Aftermarket IC's are just that. Built in China or are factory rejects. You might get away with replacing the iC's again from a reliable dealer or you might have messed up the power supply in the meantime. Good Luck

Mar 02, 2008 | JVC AV-48WP30 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...

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