We have had nothing but trouble with tv since we bought it. It has been in the shop 3 times. We have had the color tubes replaced twice and they are out again. I'm not sure which tube is bad now, but the picture has a green hue, ok if you watch the Increedible Hulk over and over...I don't want to pay a repairman to come fix it because the TV isn't worth it. I was wondering how I find out the part numbers for these so I can try to fix myself. Any suggestions?
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I would suspect the trouble is one of two things---a shorted device like an IC on the board at the end of the picture tube---most sets use either 3 transistors, one larger IC or 3 individual chips---first thing is to examine the soldering on that board looking for any broken connections.
If you can find a schematic for the set voltage checks will pinpoint where the issue is---an old trick if uses 3 transistors or 3 chips is to identify which is green and swap it for one of the other 2 if numbers on them are identical.
Second and fatal possible reason is the green gun in the CRT picture tube is shorted---almost no way around that as the tube itself would have to be replaced---most modern shops are able to test the tube and determine if shorted or not.
Hi, Symptom shows tv got problem with green picture tube that need to be replaced. Rear projection tv has 3 picture tubes, red-green-blue to make color picture. Since its an old model so spare parts would hardly be available and local tv repair shop will help you to arrange required part, if they can. Thanks.
im joel a simple electroncis tech. try to adjust the settings but it does'nt work the i think 3 color inside ( red,blue,green) is one or two of them is deffective.so the best solution try to go the expert tech nothing else
it would appear its shutting down in a protect mode
its possible its a convergence circuit problem or something on the deflection bd
but it most likley will require some assistance from a tech that is used to working on this type of set
if you noticed when it does come on that the colors are all off line then suspect convergence circuit trouble the the green leds tell you what source is still alive there is a chart in the cabinet that will correspond with each source voltage that can lead you to tracking it down if you know what to look for and have the tools to do so
You need to adjust screen drives on Red Green Blue tubes ,does all 3 of them light up? Focus/screen control box is in front of TV behind front panel Turn color off then adjust all 3 tubes to where you have a black and white looking picture, now turn color back on.
i just found out why, turn on ur tv and remove back look directly into 3 lenses, if the picture is not nice and clear or looks snowy in all 3 u will not get good color or brightness. I removed my blue tube assembly and took it apart WHILE OUT OF TV. there is cooling fluid between lense and tube, this fluid over time will build a film on the face of the tube and get thick enough to block the tube from projecting picture. (MARK EDGES IT GOES BACK TO GETHERE THE SAME WAY IT CAME APART).Find some new fluid then carefully dissasemble and clean interior of lense, housing and tube thouroughly. Reassemble and fill with new fluid. Do not use old fluid it will be cloudy and snow globe effect. Only do 1 tube at a time this will allow u to realign cross manually as close as possible before u perform convergence. Leave the green for last that is the center and the red and blue are moved to match green. Also be sure to clean mirror and back of screen. Pete
See if you can borrow a TV de-magnetizer (degauss) from a tv shop...if that doesn't purify the color, then the shadow mask inside the picture tube is bad = no repair unless CRT is replaced
and that would cost more than a new TV ! ...................T.