Question about JVC AV-48WP74 48" Rear Projection HDTV-Ready Television

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JVC AV-48wp74 Red, Blue, Green

I had a problem with my TV colors not lining up. One day I turned it on and the green was out of wack. I checked this message board and replaced the STK chips, bad soldering and all led to me just giving up on that and buying a whole new Convergence Board ($185). I just plugged this in and though now my Green lines up okay, my red is out of whack. Is there something I am doing wrong? Can anyone help me? Did i miss a step? Frustrated......Bruce rockininthenite@yahoo.com

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No you did the right move but now you align the new pc board ,try to get the service in to enter the convergence alignment section,on most jvc;s it sleep timer ,disply&video status to enter try it but if your not sure of that you can perform the alignment ask a tech to do it. on the remote certain keys do special functions and you need to know what they do or you might make it worse.

Posted on Aug 18, 2007

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Posted on Jan 02, 2017

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I have a Mitsu ~ HDTV 1080 #65511 all the colors are out of wack. I can not find a place to align them and no longer have the manual ..


Tv have colors lines R,G,B mis alignments,have colors shadows picture or 3D pictures look alike?Tv have problems known as a convergence pictures problems.The tv convergence board have dead 2 STK convergence ICS and some or all of it resistors too,this parts on the convergence board must have be replaced.To fixed the convergence board to solved tv convergence pictures problems.The shops will cost u like $300-350 for parts and labors.

Jul 26, 2011 | Mitsubishi WS-55809 55" Rear Projection...

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If I turn the tv off an try to turn if on again the screen is either solid green, multiple colored lines, or is constantly blinking. If I turn the tv on and off, it will eventually go to a normal screen...


The tv having a problems known as a convergence problems,it dying,going to be dead sooner or later.The tv colors lines R,B,G mis alignment,have colors shadows pictures or 3D pictures look alike.The tv convergence board the 2 STK convergence ICS and some or all it resistors are dying going to be dead.These parts on the tv convergence board,must replaced these parts to solved the tv picture convergence problems.The shop,will cost u like $300-350 for parts and labors.

Oct 28, 2010 | JVC AV-48WP30 48" Rear Projection...

3 Answers

JVC MODEL # AV-48WP74 48 IN. BIGSCREEN TV.


I had a problem with my TV colors not lining up. One day I turned it on and the green was out of wack. I checked this message board and replaced the STK chips, bad soldering and all led to me just giving up on that and buying a whole new Convergence Board ($185). I just plugged this in and though now my Green lines up okay, my red is out of whack. Is there something I am doing wrong? Can anyone help me? Did i miss a step? Frustrated......Bruce

Jul 29, 2007 | JVC AV-48WP74 48" Rear Projection...

1 Answer

Strips of color coming up from bottom of tv


youll need to replace the stk ics inside the tv. they are easilly found by looking for two larg heat sinks. im pretty sure sony runs stk392-510. you will have to look at the ics to verify.

Apr 16, 2007 | Sony KP-53S75 53" Rear Projection...

4 Answers

Problem With Picture


How long does it work for? Did you try to replace the entire convergence board to rule out bad pin amp? Sets with digital convergence should have a totally rebuilt board to diagnose this type of condition. Repost all the problems you had up to this point so we can best evaluate your problem.

Apr 10, 2007 | Hitachi 43UWX10B 43" Rear Projection...

5 Answers

Convergence


Remove the back containing the mirror and look into the projection lenses either at low brightness or with the tv turned off using a flashlight. Look for the fluid posibly being murky (should be clear). If this is the case, to replace the fluid: 1. Unplug the TV. 2. Remove the Picture Tube with Lens Assembly that has bad fluid 3. Find the drain plug 4. Drain the fluid in the sink. 5. Take a picture from all angles to review later. 6. Dissassemble the fluid chamber from the picture tube and clean the front glass and chamber. 7. Reassemble and fill chamber with mineral oil (laxitive found in a drug store). 8. Repeat the proceedure until all three CRT images are clear. 9. Use the centering magnets located above the CRT PCB's to get the convergence in the center. 10. Use the convergence proceedure from the tv menu to complete.

Nov 26, 2006 | Toshiba 43H70 43" Rear Projection...

3 Answers

Green Convergence out of wack


you got me stumped now. IC? Usually all components that make a video card work are made in the video card itself. You usually have to replace the video card unless you are a electronic specialists and have the tools to soder certain parts in and out of the board. Check n see how much a video card is for your unit. Might be fairly inexpensive. Wish I could help you more. Let me know the outcome.

Sep 18, 2006 | JVC AV-48WP74 48" Rear Projection...

19 Answers

Convergence problem???


I am a TV tech and have had experience with this type of problem on many sets...So Far the only trouble is the 2 output ic's stk392-110 which should be replaced with the upgrade stk392-180..All three Color Amps are within these ic's for both horizontal and vertical convergence. Sometimes a resistor or two will burn out as well because of the short in these ic's. Be sure to be extrremely careful unsoldering and soldering and use good heat sink compound and fasten securely to the heatsink metal. Manual convergence calibration may be necessary after the ic's are replaced. First try Touch Focus after the ic's have been Properly replaced. This repair should be done by competent personnel and takes about 3 hours because of dis-assembly and re-assembly time. I am writing this because i have seen on this site mis-leading info. i come to these sites myself to verify part numbers and to see if there have been additional complications such as complete shut-down.

Sep 13, 2006 | Toshiba 53H71 53 in. Rear Projection...

11 Answers

SERVICE MODE


I have a tv bluesky model PR14 .can anyone help me with service mode-

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