Question about Televison & Video
Per the recommendation of one lister, I purchased the downloadable Repair Manual for my TV. I get code 4 when I try to run the "Magic Focus" (auto focus) on my TV. Before I pull out the convergance board to check those 6 resistors, the manual mentions checking the convergance sensor. However I can not find it's physical location in the manual. I have followed the wiring harnesses from the sensor power board. I see two large boxes mounted to either side of the TV's case and two small items above and below the screen (on the interior). None of these items appears to be loose. Is there any other checking of these components to be done? It's a Hitachi 61UWX10B.
You most likely have a fried convergence stk amp, code 4 just means the error is so large the sensor didn't see the test pattern because its outside the viewable area of the sensor. If I remember, the color of the code text tells you which color and the number was which sensor... so you could deduce which of the 6 channels failed, red h or v, blue h or v, green h or v. It really doesn't matter at this point. The burned resistor(s) will also tell you all you need to know. Buy this kit on ebay, X480293 and stop wasting your time. If you are lucky, after installing the kit, "magic" focus will be able to get you back in the ballpark. I have never seen it NOT need some amount of service level alignment after the convergence circuit is repaired, but that is a whole other lesson in PTV repair.
Posted on Apr 19, 2017
I concur with Peter and the others. After replacement of the defective parts, see p. 44 of Service Manual PA No. 0147 to begin the convergence adjustment procedure. If Magic Focus cannot get you in the ballpark at this point, it's entirely possible that none of the preliminary adjustments beginning on p. 39 will be required, but they might be. Still, often enough just verifying that Magic Focus is properly set up as outlined on pp. 45-46 is enough to allow convergence adjustment to be satisfactorily completed. That adjustment is far easier to perform if you have the transparent plastic overlay "Convergence Jig Screen" (Hitachi Part No. H312258) for this model, but those aren't easy to come by in this day & age; a suitable substitute may be made by constructing a grid using string materials (dental floss will work well) stretched between carefully-marked points on opposite sides of the screen. The grid specifications in the third diagram on p. 47 can be used to determine where to mark the opposite points (note that the measurements are given in millimeters). Good luck!
Posted on May 05, 2017
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Posted on Jan 02, 2017
UNSOLDER BOTH THE CONVERGENCE CHIPS AND SEE IF THE SET WILL COME ON-if one of them is now shorted--it will cause this kind of problem.
let me know if you have questions --I am here to help.
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Posted on Dec 05, 2009
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Know basic soldering?That all require changing convergence ICS all it resistors.Tries Tv repair World.com,Tvrepairkits.com for the convergence kit.
Posted on Jan 16, 2010
SOURCE: magic focus 4 error
Error 4 is listed as an overflow in the convergence section.
1. Check the placement of the sensor
2. perform an Adjustment check of th H/V size & centering
3. Conv. amp. gain check, check these resistors:
R041, part # 0790024R, RES.CHIP 1/16W 100 OHM
R046, part # AQ00164R, RES.CHIP 1/16W 75 OHM TAPE
R050, part # 0790059R, RES.CHIP 1/16W 47K OHM
R058, part # 0790054R, RES.CHIP 1/16W 18K OHM
R062, part # 0790047R, RES.CHIP 1/16W 5.6K OHM
Posted on May 15, 2010
Projection TV sets have two very common problems. One is convergence ( 3D/Warped video) the other is CRT fluid ( Dull Video). Here are more details and solutions for both. Repair kits with instructions are also avail from www.TvRepairKits.com
Common Problem #1) Convergence has gone out
Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.
This is a very common failure on these projection sets and a fairly simple DIY fix. All projection sets including Samsung, RCA, Sony, Philip Magnavox, Panasonic, Pioneer, Akai, GE, JVC, Toshiba, and others at some point will have the same problem.
Common Symptoms include....
For more more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull
Common Problem #2) CRT Fluid is Cloudy
Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.
Picture of a set that needs the fluid changed.
TV set after fluid change
You can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull
Posted on Mar 09, 2011
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Jul 16, 2018 | Televison & Video
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