Question about JVC AV-48WP30 48" Rear Projection Television

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Hitachi50dx10b Red And Green lines

Red and green streek lines and the picture with a red shadows. I already tried both the settings screen and focus but no success.

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Re: Hitachi50dx10b Red And Green lines - JVC AV-48WP30 48" Rear Projection Television Projection Televisions

Hello sir

Posted on Feb 18, 2008

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Re: Hitachi50dx10b Red And Green lines

You problem can be your vertical controll circuit, horizontal control circuit and your filter capicators, to figure out which one you will need an on the spot tech.. I'd recommend if you got limited knowledge of electronics you get a tech cause these things can carry hight voltage even when not plugged in.

Posted on Jan 23, 2008

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My 52" RCA P52937SG screen bows on the top and on

What you are describing can be due to a number of different settings.

Focus on the red and green guns
Sharpness on the red and green guns
Horizontal position and size
Vertical position and size.

Please consult a professional for adjustment on these items as they are all near or connect to parts that have Hazardous Voltage.

Mar 22, 2011 | RCA P52937 52" Rear Projection Television

1 Answer

Our tv has red and green shadows on the picture when words come on at the bottom of screen they look like a shadow double Peoples faces will be outlined with red and green lines

your color engine is failing its also known as the optic block and they are very expensive to replace good luck google the optic block failure in these sets to better educate yourself with what your dealing with ok it most often blue that shows the failure but green and blue to and red

Dec 21, 2010 | Sony KP-46WT510 46" Rear Projection HDTV

4 Answers

Blue will not focus causing "shadows". Magic focus will not solve the problem.

This tv have a problems call convergence,it dead.The tv convergence board the 2 STK convergence ICS and some or all it resistors are dead.These parts must be replaced to solved convergence problems.The shop will cost u $300-350 for parts and labors.

Jun 17, 2010 | Hitachi 53FDX20B 53" Rear Projection...

1 Answer

How do i get a crystal clear picture on this set?

Your tv is experiencing convergence problem. if you have tried the perfect focus adjustment from the menu and still not fixed, then the convergence ics need to be replaced. these ics converge the blue and red beams with the green to give a clear picture.

Hope this helps

please rate me!

Mar 19, 2009 | Philips 9P5034C 50" Rear Projection...

1 Answer

Color adjust


Adjusting the picture tubes is a scary proposition, but since you have already done it...
The easiest way to balance the gray scale is to turn the color all the way down on the set. The next part is easier with two people if the screen controls are on the back of the set. This is the part you saw that has six small knobs on it. There are control for the focus of the red, gree and blue and for the screen level of the red, green and blue. You will want to adjust the screen controls in an effort to get the picture black and white (this is why you turn the color down), hence the term "gray scale". Just make slight adjustments, take your and be patient. It will take some time, but you will get your picture balanced back out in time.

Hope this helps!

Jan 15, 2009 | Philips 50P8341 50" Rear Projection...

2 Answers

Toshiba 57h81 green will not focus

Typically this is a convergence problem and can be repair relatively easy. Refer to this video to determine if you truly have a convergence problem. Also make sure you use your TV's original remote to make this adjustment.

Nov 15, 2008 | Toshiba 57H81 57" Rear Projection...

1 Answer

Green cruve line

Good Day;
Suspect Convergence IC's STK4274, part Number 2003191. Replace all three IK04(red), IK05(green), IK06(blue).
Good Luck, big IRISH.

Aug 30, 2008 | Hitachi 50UX26B/27K 50" Rear Projection...

1 Answer

Samsung Rear Projection Problem (not convergence)

The tv has 2 focus adjustments for each tube, mechanical and electrical.

1. Mechanical focus is set by looking at screen from back (through inspection plate on back of most samsungs) and rotating the lens assembly on CRT. loosen wing nut and turn lens assembly to go through focus and back to best position.

Put convergence pattern on screen and manually misadjust bottom red and green lines convergence so they can be seen through inspection hole.

With back cover of TV off you can usually reach your hand up beside the lens assembly to loosen the wing nut then rotate to adjust. Green is in the middle. The focus will be obvious when you rotate and look

When you are finished make sure the foam dust protector is not over any of the lens assemblies and the wing nut is tight.

2. Electrical focus - located at front of unit. the front grille/speaker cover is removed and maybe a cover over the front crt inspection hole.

In the inspection hole there is a black plastic "Focus/screen adjust Assembly" with 2 rows of 3 controls.

One row is focus and the other is screen. The middle controls are for green with R/B on either side. Usually the controls are labelled as "focus" and "screen". You want to adjust the focus controls, one for each color. Look for the focus or screen label imprinted in the plastic. Don't play with the screen settings.

With the same misadjusted convergence pattern you can see a red, blue and green line. Adjust green focus and watch green line for best focus. Do same for other 2.

Screen adjustments are very exact and delicate. The easiest way to deal with them is to turn color off in Customer adjust menu. Put any color tone adjustments in the middle (low, med, high, put at med).

You should have a b/w picture if there are no crt or other color related faults. If it is close to B/W leave screens alone.

If the pix is too green, then the green screen setting must be reduced a small amount. Do not play with these adjustments as most TV repairrers have a difficult time adjusting them.

If focus adjustments don't help then focus control or CRT may be defective. Needs expert to determine.


Jun 24, 2008 | Samsung HCM4216W 42" Rear Projection...

1 Answer

Red/green drooping L top corner

i have found when samsangs convergence are out of range perfect focus will fail. if the are out of range a technician will try to adjust the set in service mode. store these values and then this will be the base for the perfect focus. If the set has a bad convergence cuircit then they have to be replaced.

Nov 05, 2007 | Samsung HCN653W 65" Rear Projection...

2 Answers

Toshiba 57h82

your convergence amp ic's./if you want to cheat/align the other two colors and manualy move the green yoke rings on the green picture tube neck so the green cross aligns with the red and blue.,they shuold form white when all three are aligned,on top of each other.

Sep 13, 2007 | Toshiba 57H82 57" Rear Projection...

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