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It is pretty much junk, sorry to say it but your picture tube went out and it is cheaper to buy a new t.v. My grandpa use to fix them for us for free but he passed:( If you call some where see how much they would charge for a picture tube, I bet it's expensive???
<p>How to check the colour cathodes of a picture tube for emission<br />
<p>It is very easy to cehck the emission of the cathodes of a colour picture tube. Assuming all other circuit parts are working, including LOT [Line output Transformer] and video output section.<span> </SPAN>There is proper screen voltage; focus voltage and EHT [Extra High Tension]. Locate the three cathode points on the base card, usually marked as Gk, Bk and Rk.<span> </SPAN>Keep the brightness, contrast and colour control to zero position.<span> </SPAN>Take a wire of suitable length, say 50cms or so, tie its one end to TVs chasis [negative].<span> </SPAN>Take one resistor of value 100K 1W, tie its one end to the other end or the wire, thus one end of this resistor is now connected to negative chasis and the other end of it is free now.<span> </SPAN>Hold this resistor with with some electrically noncunductive material [using hand gloves will be better]; switch on the Tv, wait a minute or so to get it warm up.<span> </SPAN>Just make a touch at each cathode of the picture tube base card solderings.<span> </SPAN>Just one touch will give you a colour of the respecive cathode on the screen.<span> </SPAN>Never hold it for long time. This process can be used for checking cathode emission of any type of Cathode Ray Picture tubes. <br>
If there is no picture and 3 vertical lines in the center of the screen, stop. Turn off TV. You have no horizontal deflection happening. Lines will burn into crts and be permanently visible after repair.
No horizontal deflection is caused by Horizontal sweep circuit failure, maybe flyback transformer and associated components. More than a simple do-it-yourself repair.
I have the same problem with a DCR-HC45.The culprit is the ribbon between the circuit board and the LCD display,but my problem is worse,sometimes the screen turns white and I can't see anything on it.I have no idea from where to buy a replacement ribbon but I know how to replace it.
it is very simple, by default in monitor circuit RGB (Red, Green, Blue) tube is installed. and in combination of both of three colors we are able to view colorful image. due to non functionalty of Red color u r not able to view red color in screen, either you replace picture tube or purchase new monitor. coz cost of this tube is equal to monitor.
TV's will show funny colors because of magnetic fields affecting the face of the picture tube. A "degaussing" circuit (a coil of wire around the tube and some kind of control circuit) is supposed to try to neutralize this when you turn the set on. Sounds like it's not working correctly in your TV, or may not be strong enough to counter the field.
A real cheap set may have no degaussing at all, or may have a manual degauss button on the back. Does the owner's manual tell you anything? The connector from the coil to the circuit board may be loose. Try reseating it. (Be careful if you take the back off your TV. Make sure it's unplugged, and be aware some parts - especially the picture tube - can store a charge for a while after the set's off and can give you a nasty jolt.) It's also possible the tube is defective, but unlikely unless the set was dropped or exposed to a large magnetic field (like kids playing with a magnet near the face, or turning off a vacuum cleaner right in front of the set).
Hand-held external degaussing coils are available (check eBay). But without seeing exactly how bad the color is under what conditions it's tough to say what's best to try.
by calling the tech they will answer your problem they will verify the problem in your colour circuit, the colour crystal or other related circuit could be your problem,the tech will give you the answer.good luck.
this sympton is characterized by the presence of red, cyan, green, magenta, blue or yellow colour in a supposedly plain white raster. proper colour reproduction cannot be expected if the raster is coloured.
this symptom is caused by a poor white balance adjustment of by a trouble in the CRT, colour amplifier, color demodulation or colour output circuits.
if the raster has a tint of red or cyan, check the R-Y output circuits and the first grid, second grid and cathode circuits of the red electron gun.
but if you dont know anything about this, just bring it to a qualified service technician. good luck!