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

2 Answers

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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  • Sam N Jan 23, 2008

    I already tried both verticle and horizontal size adjustment on my tv both of them shrinks and enlarge the picture but not solving my problem.
    On digital arays settings i already alligned n0.3,4,5,6,and 9. No.1,2,7,and 8 cannot alligned the blue cross is alligned with the green cross but the red cross moves on sideways not up and down enough to alligned all three colors in one to make it white.

  • Sam N Feb 12, 2008

    Hi Darklord1





    I replaced two blown resistors 2.2 ohms one watts and two stk 392-150 ics in the convergence panel. Picture is little better except it have curves on sides and in the top middle and bottom. what your suggestion about the resistor # rk41, rk57,rk97 if i relace them with one watt resistors. Do i need higher wattage resistor to replace the 15 watt 0.62kohms resistor on the filter board above the convergence pannel. I removed and checked the capacitors on the vertical and horizontal cct. C-615, C-610, C-929, C-915, C-905, C-906 they are ok. Thanks for your help.



    Sam

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Hello sir

Posted on Feb 18, 2008

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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

  • Rishi Roshan Ali Jan 23, 2008

    Then its your horizontal contraoll circuit, you will need to get it replaced and you will need to try your filter capicators,, the ones controlling the circuit it self..

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1 Answer

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

Red,green and blue lines across screen


I f these lines are slightly diagonal and they all showed up at the same time. you probaly have an open resistor in the ABL circuit. since your set is 13 yrs old, I would not put a penny into it.
You might take the front grill cover off and the panel behind it and find the little black box with 6 little controls 3 are for focus 3 are for screen turn the screen ones ever so slightly counter clock wise. the control in the middle is the green screen adjustment. If the green line goes away try the one labeled r for red and b for blue.

Mar 31, 2009 | Hitachi 50V500 50 in. HD-Ready LCD...

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...

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.

easyab

http://calgaryconvergencerepair.weebly.com/convergence-ics.html


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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