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

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Red projector will not converge

I can not get the red projector to move manually. It will move manually up and down but not side to side. Help please!!!!!

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  • Anonymous Feb 26, 2008

    I have same problem. Looks like a very common problem with this set. My tv was only three years old when this happened, ill never buy a jvc tv again.

  • computerdm27 Feb 26, 2008

    My red is out of whack. In the manual convergence the red is the only one out of alignment, and is lined up in only 1/4 of the screen. The other 3/4 of the screen has the red either to the left or to the left and arced downward. I can move most of the red lines to the right and left but not up and down. The picture obviousle has a red shadow to the left and then slants downward. Is this a convergence issue involving the IC chips? If so would someone be as kind as to mail me instructions on how to fix, as well as recommended online stores to buy the chips. The set is only 5 yrs old, would like to fix instead of replace

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Red projector..red tube...do you mean convergence cosshairs...If this is the case. what possibley has happen is the output resistors on the convergence ics have possible failed. and will have to be replace. if you can solder and can find the parts... not to difficult repair. you might however run in to setup issues. any tech can do this. an should not be expensive.

Posted on Feb 22, 2008

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1 Answer

Hitachi 51f59/a red and green projectors are not working


If the set is 3d or colors skewed look to see if set has "magic focus" which is auto convergence---it may or may not help. Also look in customer menu for convergence to see if you can call it up with the remote-----a set with this: if red or blue lines will not move in some direction(not adjust) one of the two stk convergence chips is bad.

Kits are available and it can be a do it yourself repair---look first to see if convergence will not adjust and if you have that let me know if you need advice----for example: red will move up/down but not left right.

SD TECH

Oct 21, 2012 | Hitachi 51F510 51" Rear Projection...

1 Answer

The red projector pulls away from the center and drops six inches


The convergence output IC responsible for red probably has bad solder connections on it's pins. However, resoldering it will only be a temporary fix. To repair this set properly both of the convergence output IC's need to be replaced.

Jun 02, 2009 | Sony KP-53XBR45 53" Rear Projection...

2 Answers

Red lines running through tv


Here are some of the most common symptoms and example photos of a convergence problem

  • 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.
701cb04.jpg
77ea520.jpg
f0900cb.jpg
Here is a quick test....

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

Try to adjust the red and then the blue convergence.



You should be able to move them up, down, left, and right.

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

2c07611.pngSolution #1

You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.

Mar 17, 2009 | Sony KP-51HW40 51" Rear Projection...

1 Answer

CRT Rear-Projection Red Vertical Alignment


You may have a convergence problem. Here are some of the most common symptoms and example photos.

  • 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.
701cb04.jpg
77ea520.jpg
f0900cb.jpg

Here is a quick test....

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

Try to adjust the red and then the blue convergence.



You should be able to move them up, down, left, and right.

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


2c07611.pngSolution


You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick email and they will put one together for you. Their kits includes photo instruction guides, original Sanyo STK chips, convergence resistors, pico fuses, etc.

Oct 11, 2008 | Philips 51PP9200D Television

1 Answer

Red Convergence


all you gotta do is use the manual convergence if only the red is messed up

Jul 27, 2008 | JVC AV-56WP74 56" Rear Projection...

1 Answer

My red is out of focus


you need to replace the STK392-110 convergence ICs you need to replace them both. Very easy repair on that model. You can get new replacement ICs at the foloowing link along with free instructions and free instant messageing tech support to help you through the repair. Heres the link.
http://servicemanuals.vstore.ca/

May 26, 2008 | JVC AV-48WP74 48" Rear Projection...

1 Answer

Pt-47wx49e service mode


It sounds like the convergence amplifier IC for the red crt is at fault. To check this, go into your user menu and pull up the red convergence. Try to move it up/down or side to side(it doesnt matter). If it moves up and down, then the vertical amp is working. Likewise if it moves side to side, then the horizontal part of the IC is working. If it dosen't move at all, or only moves up/down or side to side, then the IC is bad. There are 2 large IC's on the chassis, mounted to large heatsinks. They have STK392-110 or some variation of an STK392. If yow feel that the IC is bad, change the ic BEFORE you go into the service mode, as you wont need it if the ic is bad. To get into theservice mode: 1 make sure tv is in cable mode 2 set sleep timer to 30 minutes 3 tune to channel 124 4 use volume down on front of set to turn volume all the way down. ( writing will appear in the top left corner). 5 use remote control and press the power button. 6 the 7 button on the remote will put it convergence mode. Good Luck!

Jul 26, 2007 | Panasonic PT-47WX49 47" Rear Projection...

1 Answer

No horizontal red convergence control


Probably the red convergence output IC has failed. The chip is basically a stereo amplifier that serves as a horizontal amplifier and a vertical amplifier. I suspect the vertical part has failed and is not uncommon. Should be generic STK392-150's or maybe STK392-110/120 I believe. By the way when the line moves up and down that means the vertical is working when it moves side to side the horizontal is working.

Feb 03, 2007 | Philips 60PP9202 60" Rear Projection...

3 Answers

Convergence problem


We need a better description of what you mean by shadowing. However I am assuming: 1. You mean it ''bleeds'' off to the right when you have something with a hard red/blue drive. 2. When you turn the contrast and color down a bit it gets better. unfortunatly I cannot tell you how to fix convergence, but I can think of some other possibilities. In this case the red/blue emmision of the crt is dying off and going into saturation when driven hard. To fix, replace with a new picture tube/crt. In some cases you can get a little more life out of that tube (with a watchable picture) by having the screen, focus, cathode bias, and drives slightly readjusted. It will take someone with experience in doing these adjustments on a weak tube to get it looking as good as possible. Given the construction of the cathodes (guns) in that crt, only a very low level crt reactivate should be tried on it. The hard rejuv most crt testers give is highly likley to completely destroy the cathode on that crt.

Mar 22, 2006 | Toshiba 55H70 55" Rear Projection...

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