Question about Zenith B36A24Z 36" TV

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COMPLETELY DEAD NO SOUND NO PICTURE I also noticed a part was loose - looks like a silver nickel (round) with two wires soldered to it. I believe this part is THX3415 and has the following numbers stamped on the disc: 63-11119 778909

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  • crownline Feb 13, 2008

    Thanks for the help.



    Now, any ideas on why the set is completely dead?

  • elliswittman Sep 26, 2008

    same problem and found the thermistor unhooked and soldered it back on but it still has HV shutdown. Any help would be appreciated I have checked the common capacitors C3210 and 3211 and found them to be OK. Any help is great.



    Ed

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Hey !!! I solved my own problem. After I soldered up the thermistor I still had the same problem so I checked all the known parts around the startup circuit including the power supply relay and relay driver. All found to be good so I then attached a scope and signal generator and applied a horiz signal to the base of the Horiz output...voila!! I got high voltage so I tracked the horiz siganl thru the circuit and found a coil to be bad along with 2 electroletic Capacitors. The Zenith part number for the coil is 20-4073-01 and its part # on the board is LX3262. The caps are 4.7 Mfd @ 50 VDC located at CX3261 and 10 Mfd @ 350 VDC located at CX3205. I hope this will help someone else.

Ed

Posted on Sep 27, 2008

That would have to be looked at and trouble shooted on the bench by a professional. So many things could cause that symptom.

C-Dog

Posted on Feb 13, 2008

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That's called a thermistor. It's used in the degaussing circuit of the TV. If it's loose from under the board then it won't hurt to resolder it back on.

C-Dog

Posted on Feb 13, 2008

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1 Answer

Why does the pictures takes a long time to come on? Then when it finally comes on, after a while, the picture goes off, but the sound stays on from the time the set is turned on.


Look for any loose soldering terminals at the picture tube base card. Resolder all the suspected solder terminals, by applying a little more solder. Repalce the picture tube connecting socket.

May 21, 2012 | Zenith C32V37 32" TV

1 Answer

Last time turned on tv picture flashed and went dead, Now when I turn it on it makes its normal clicking sound but does nothing. no power light or sound black screen, set is rarely used. Only thing it does...


Sir this problem is commonly caused by bulging capacitor or loosed connection, if you remove the back cover be sure to unplug the unit. Bulging capacitor is producing a low and unfiltered DC supply, one of the sign is the clicking noise you hear came from the relay. Or try to tap the side of your tv and observe if the tv will react. ekcnoel_9.jpg
ekcnoel_15.jpg
This a bad capacitor ekcnoel_8.jpeg
this is the loosed or dry joint it is much better if you use a magnifying glass to determine the loosed or dry solder. Good day and best regards.

Sep 17, 2011 | Mitsubishi Standard (CRT) Televisions

1 Answer

My Picture is coming and going every few seconds. Screen goes black. Picture color is no longer good, its greenish now.


Hello
I assumes that the fault is only with the picture, but sound output is normal. The fault you describes here is due to some loose solderings at its video output board. The video output board can be located at the neck of the picture tube itself, directly pluged on to it. It can be detach out from the picture tube, by applying a little backward force. Be sure no to make any sideways movement, as it may damage the pins of the picture tube. Pull it straight back to get it detached.


gopakumarg43_71.jpgJust see the opened view of your wega tv. Here the main board is placed vertically over the CRT base board [video output board]. Behind this board, you can see a small square board with some components on it soldered directly. Pull out that board from CTR base. Just look fit for any loose solder points. Normally it will be difficult to detect these solder loose points, as some of them may be microscopically small to view out. So, just do, what we do to it at service table. Just resolder all the suspected loose solder terminals including the solder terminals of picture tube base socket, soldered diretly to that board; by applying a little more solder, without making any solder bridge short in between adjecent solder terminals. This must solve the problem of you TV. You should have a concept of soldering and a good quality soldering iron and solder wire to do this work.
I'm not an English. My mothertoungue is entirely different to that of English. So co-operate with my language please. I'm only trying to transfer my ideas and experience that I got from the last 40 years of TV servicing.
If you want any more assistance from me, feel free to get me by Fixya. OK.

Sep 16, 2011 | Sony FD Trinitron WEGA KV-27FS100 27" TV

1 Answer

My screen goes from a normal picture to a green screen with lighter green horizontal lines. Ocassionally, it will switch back to a normal picture, but lately it is taking longer to do so, or it...


Hello
The fault to this Trinitron TV is loose soldering ofcourse. Check all the soldering points at the video output card, which can be located at the base of the picture tube. Normally the components fitted on this board will heat up while working, and repeated heating and cooling will make the solder terminals of the componets to get loose contacted. Just pull out the CRT base board from the CRT causiously without make a damage to picture tube pins. Look for any loose solderings at this board. It is quite difficult to detect these loose solder points as some of them will be microscoppicaly small and can be seen with the help of a magnifying glass. Just do what we do at service table. Just resolder all the suspected solder points by applying a little more solder, without making any solder bridge short between adjecent solder terminals. In most cases, nearly 85%, the fault will be cleared out with this process. Check the plug in connection wire [comes from main board to picture tube base board] for any loose connection. Just pull it out from the main board, and reinsert it for at least two times. If any loose connections to this wire connection, this will clear out it. OK.

Aug 26, 2011 | Sony FD Trinitron WEGA KD-27FS170 TV

2 Answers

No picture but with sound


There are three things you should try. If you can safely pull the back cover out safely, do so. First thing to look for,is the suction cup attached to the picture tube securely? Be sure that it is. Make sure the TV is not plugged in, when you check for a good ground to the Tube (suction Cup). Then plug the TV in and power up. Still no pic? If you feel that this is not the problem, next, pull the board out of the TV. Be sure to discharge the picture tube before you remove the suction cup. Unplug the TV. A wire taped to a flat screwdriver, the other end of the wire connected to the silver braid that surrounds the picture tube. Now slip the screwdriver under the suction cup, you will hear a snap, you have discharged the tube, you may remove the suction cup. And you may pull the board completely out of the TV. Find the vertical IC and resolder the 7 or 9 pins. Do not use excess solder and short the pins together. Each pin must soldered individually and not together. Check for bad solder grounds on the horizontal transformer. This transformer is usually a small square box with five or six pins. When not soldered with a good ground, it will crate the problem you describe. Next, solder the pins on the Flyback Transformer. Resolder any and all power resistors. A power resistor is one of two watts or more. I do not believe your horizontal transistor is bad in this case, you resolder this as well. A bat transistor would hand you a dead TV. Do go over the rest of the board and really look close for any and all bad solder grounds, solder as necessary. Last be sure you have good solder grounds on the back of the small board that connects to the picture tube. I'm sure you will get your picture back, try all of the above and let me know how things go. Thanks for asking and show all hands of support!

Jun 23, 2011 | Sharp 27R-S50 27" TV

1 Answer

No picture, has sound


Well if you still have sound it means that not everything is dead inside. You could take off the back cover and look for cracks or broken solder joints(specially around the larger transformers on the main circuit board, You might also want to look at the small board mounted on the back(neck)of the picture tube and make sure it is plugged in all the way.
As for resurrection you may need patience and lot of solder. Good luck

Dec 02, 2009 | Standard (CRT) Televisions

1 Answer

No picture when TV is turned on, sound is OK


try to look at its circuit board and look for cold solder or loose solders usually solders with crack,they might be the problem,i dont think its the flyback coz you have audio.try also look at its picture tube at the back tru the crt if the filament is ok or it may also have loose connections

Jan 13, 2009 | Samsung TXJ2554 TV

1 Answer

Sharp 36in tv


Your problem may well be a loose connection ( cold solder joint ) on the printed circuit board. A person would need to disassemble the set and remove the printed circuit board so that you can view the soldered side. Look for any connections that may be loose or discolored ( the color on all the soldered places should be a shiny silver color ). When you have located these area or places that seem to be different or loose, resolder them with a soldering iron, and electronic solder lead.You set should be fixed. Good luck and I hope this has helped.
AS A NORMAL PRE CAUTION, ALWAYS UNPLUG THE SET BEFORE OPENING OR REMOVING THE BACK

Ed
NC Electronic
Mills, Wyoming

Feb 18, 2008 | Standard (CRT) Televisions

3 Answers

No picture/sound with cable


well tuners are being made smaller (and there is more cold solder in some points due to heat) so i would look up a new tuner for that tv...and if you know how to solder ,do it yourself it will be cheaper

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