Question about Samsung PCL545R 54" Rear Projection Television

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Green bow tie, convergence not helping

Hello, i have a Tantus model SP-54T5HP VER1.0 TYPE CM54T6, the green colour has gone to a shape of a BOW-TIE and the convergence is no good, perfect focus only goes as far as 4%. I try to do convergence with the crosses but thats a joke, the middle of the screen is stable but not the top and bottom. Any ideas most welcome, thanks.

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Yes, your geometry correction has failed and you will need to seek qualified tech for help. You need what are called STKs and you should be able to get the job done inhome for under 300.00
Craig www.classtorations.com

Posted on Jun 08, 2008

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Convergence problem please help


You likely did not do all the steps required to fix it. If you bought a complete repair kit from sites such as Tv Repair Ktis go back and ask them for help. If you did not get one of their kits you can still purchase just the convergence repair instructions.

Jan 05, 2012 | Hitachi 53UDX10B 53" Rear Projection...

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How do you tie a bow tie


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Jan 30, 2011 | YouTube Videos

1 Answer

Color is off with double image?


Is the image bow-tie shaped, with red, green or blue fringing effects? If so, one of your convergence amplifiers has gone bad. (Bow-tie: at least one of the three primary colors in the picture goes out to the corners, but the top, bottom and sides are bowed in at the center.)

If it is simple color fringing, with no color grossly misplaced, something has messed up the convergence. This may be caused by a strong magnet near the set (for example, a poorly shielded audio speaker), moving the set so its orientation in the geomagnetic field is altered or its components mechanically shifted (rough handling).

If a convergence amplifier is bad, replace it before doing anything else. If you just have minor fringing, see your owner's manual for instructions on using the remote control to adjust convergence. If it isn't in the owner's manual, you'll need the service manual. Caution: if you try to adjust convergence with a failed convergence amplifier, not only will it not help, but you will have a lot of extra work trying to get it back to normal after you replace the amplifier. Try a small adjustment along one edge of the picture. If one or more of the selected color dots in the convergence pattern won't move, and you are sure you are following adjustment directions, stop immediately and proceed with hardware repair.

Convergence amplifiers are usually marked STK392-nnn where nnn is a specific variant number. Two are used; I usually change both because quite a few people have changed one and had the other die not long afterwards. Sometimes there is a fuse in the power feed to these modules that is also blown. If you change the fuse without replacing the amplifiers, you'll probably waste a new fuse.

Oct 06, 2010 | Panasonic PT-53WX53 53" Rear Projection...

2 Answers

I have this same problem with the PT51HX41E but in the convergence menu the green and red are allowed to move. but the blue on the right side of the screen is not allowed to move and it looks like its...


My first guess would be a bad convergence amplifier - this is common, although usually all three of the amplifiers in the integrated circuit die at the same time, which throws off at least two colors and creates a "bow-tie" effect. I surmise you have half of a bow-tie in blue only.

If you could look at the blue output waveforms with an oscilloscope, you would see right away if this is the problem (flat-line instead of sawtooth wave). It is possible that both of the blue convergence amplifiers are working, but one output is not getting to the blue deflection yoke.

Don't mess with the convergence anymore until you get this taken care of. Changing the convergence now will only make it harder to get it back to where it should be once the circuit is fixed.

Sep 22, 2010 | Panasonic PT-51HX41 51" Rear Projection...

1 Answer

Picture is blurry and is shaped like a bow tie on my tv


This is a convergence problem that you can fix if you can solder. Let me know if you wish to attempt the repair and I'll post additional details and instructions.

Dan

Oct 10, 2008 | Mitsubishi VS-55707 TV

1 Answer

Sumsung reprojection stop working as we were watching it to coulor change and a small line came up on the srceen then it just turned it self off.It is 4 years old and has 3 colour round tubes behind the...


what kind of line came up did it come up in the middle of the screen or was it a solid colored screen with arched lines through it....need more info on what its doing

May 10, 2008 | Televison & Video

1 Answer

Mitsubishi WS-55807 "Bow-Tie" Problem


If your not a tech, its highly advisable to not even open the set because of the high voltage and x-ray radiation issues. Now if your a technician ,you gonna need to get a service manual, Look up the convergence circuit, Find the two or three convergence driver ics, find the b+ feed resistors to those ic, and order the exact replacement parts. if you dont replace all at once, and with exact replacements, you will be in the same boat a few months down the road. This is not a repair a handi-person should consider doing as even if you get the ics replaced, your gonna need to do some minor or could be major convergence alighnment and your gonna need a cross hatch generator to do this. This repair should cost ya about 300 to 400 bucks? Sorry man Good Luck

Jun 14, 2006 | Mitsubishi WS-55807 TV

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