I just bought this TV used. The color is bad though: I know there are 3 primary colors (red, green, blue) that make up each pixel, but I suspect that the blue electron gun is broken because all the pictures have a green or yellow tint.
Is there an easy fix for this problem? If it's something that requires a trip to the repair shop, what should I expect to pay?
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Re: Broken Electron Gun?
Pls do not jump to hasty conclusions! 'Electron guns'do not break!
It could be a simple problem like a faulty CRT base! Or perhaps the Blue Output Transistor is faulty!
First ask a good technician to have a look.
If he confirms that the Blue Cathode is faulty, then I advise that you get a new set.
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The red "gun" of your CRT monitor is going bad. You will need to get a new monitor, and you should seriously consider an LCD flat screen. It will save you allot in electricity.
A CRT monitor is a very cool piece of technology inside... even though they are going obsolete with the advent of modern LCD displays.
In every CRT (Cathode Ray Tube) monitor, there is a trio of "Electron Guns"- they fire electrons at the front of the screen, hitting it with billions upon billions of electrons... the "bullets". Each gun is aimed at a set of colored targets, called "pixels"... one gun hits red ones, one for green, and one for blue. Combinations of these colors make up everything we can see.
When the red "gun" cannot fire enough electron "bullets" at the screen, the blue and green together make the picture appear yellowish.
If you want to learn more, look up "cathode ray tube" on wikipedia for starters!
A word of warning- the technology is very cool (I used to teach how CRT screens worked as part of my job teaching Missile fire control radar for the Navy), BUT:
THERE ARE VERY HIGH VOLTAGES INSIDE A CRT MONITOR THAT CAN KILL!!! DO NOT OPEN
Remember- the electron "guns" inside are shooting billions and billions of electrons at the front of the screen. They are being collected from the screen by a high voltage "supply". Most CRT's operate with anywhere from 15 to 45 THOUSAND VOLTS!
This usually means the red or green or both primary color module is bad. Monitors come with 3 primary color module controllers and they use them in various combinations to make the other colors. The primary colors are blue, green, and red.
Red color gun has failed, which will make the picture over saturated with the other two colors(blue,green) the bad news is the three color guns need to be replace in a set(all at the same time) because if you only replace the red it will over saturate the older blue, green guns then your picture will be mostly red.Unfortunently in most cases it's not worth the investment, better off to purchase a new tv. Good luck !
ok well "tube" tellys as they are called use an electro magnet to keep the picture stable and colours correct its called gaussing now if you have a speaker or something magnetic nearby it will stuff up the colors but only normally producing colors like purple,green, or white
if you have colors across the screen (that aren't caused by magnetic force) then you need to take it to a repairer or decide wether or not to buy a new one this issue can turn out to be quite hard to fix and can be expensive the different colored electron guns may be burning or burnt out causing pale color or it could be as simple as a power transistor in the H.V supply has shorted out..and causing power issues to the tube.
hope this helps,ben
Normal color picture is composed with 3 colors R-G-B (Red-Green-Blue). Picture turns Red means: Missing Green and Blue colors (many reasons: bad contacts, projector tubes dead, and other...). Try to give some "tabs" to diagnose ... I don't know what is the type of your Projection TV, how long you owned it, to have more idea.
If you are asking about Guns in rear projection tv then answer is No. Rear projection TV has 3 Guns (CRTs), red-green and blue and each gun has its unique color phosphorus coating to produce its mono color (red /green /blue) and these are not interchangeable. Need further info, let me know.
Hey Kuld.. Just asking... since both, your TV and your monitor have the same color issue...??.... have you been to the optometrist lately... (My Dad had this color issue with his eyes!).. he was red color blind..
Turn the set on without an antenna, so there is only snow on the screen. Measure the 3 cathode voltages at the CRT, red green and blue. If the 3 voltages are about the same, around 175 volts, then the CRT is bad (purple picture means bad green gun). If the red and blue are around 175 and the green is over 200 volts, then there is a chassis problem, usually the video output transistor itself has gone bad or come loose.