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Re: Toshiba 55H81 Blue and Red Only
So you missing the green is is either a bad connection on the green crt or convergence amp ic bad do this first http://www.riddledtv.com/repair/journal/Toshiba51H84/index.html then if that doesnt fix it http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html
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Toshiba 36A10 36" TV is the model you have indicated---
If the screen is all red and or too bright (no green or blue can be seen) the problem is in one of two places: Either a shorted picture tube or the board that plugs onto the end of the tube.
That board sends red,green, and blue video and information to the picture tube via 3 pins on the tube (the K or cathode for each).
The set will have either 3 IC's on that board or 3 transistors, or a single larger IC for this.
to troubleshoot this:
I would locate the Red Cathode and unsolder that pin at the socket on that board--takes red out---if you have green and blue picture then---it is either the IC/transistor that feeds that on the board or the tube itself.
If it has 3 chips (usually will each have a metal plate attached for cooling) you can either remove and replace the red one OR what I do is swap it with the green or blue chip---if suddenly you now have a blue or green only screen you know that part is bad--simple as that.
If for any reason the picture tube turns out to be bad--you are finished and so is the set= way too expensive to replace it.
TV has 3 CRTs, red, blue, green. Its possible that you have a bad blue or green crt. If that were the case the red would be prevalent and the pic would be reddish. The tv has a picture "level" adjustment that if done correctly could get it looking correct. Its probably best to have a tech. do it since you can make it worse if you do not know what you are doing, also there are high voltages present. Good luck
No picture or do u have a blue (or some other color) screen? And the blinking red light, is that the indicator light down by the power button that is blinking? I have the same tv and very similar problem, i have a blue screen and the red indicator light is blinking. If you have gotten ur problem fixed I would love to know how, or vise versa if I get mine fixed.
Hi, the lamp you talking about ,they are your picture
tube [in projection tv you have tree separate tube 1 red 1 blue 1 green ///if you have one still working
you must have a blue or red or green picture
so you probly have some thing in the electronic circuit ,for your tube heater are defective / and that can be fixed because the
price of these tube are arround 300_ box/each
hope that will help you///verify first the soldering of connector where the wire are connect to the tube to the main board or some resistor blow the heater voltage is 6.3 volt ////good luck ask some one you now he know electronic
You are describing the MASTER SCREEN/ FOCUS CONTROL BLOCK---black with six controls--three are red, green and blue focus--the other three are screen controls--red, green and blue--- the screens are adjusted so with the color off you have normal brightness and a black and white picture--
They have nothing to do with any Convergence problem and unless they have been tampered with rarely need to be adjusted---
Let me know if this helps you AND IF YOU HAVE ANY QUESTIONS OR NEED ADVICE--LET ME KNOW.
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.
It will be 11 years next month that I've had my Toshiba 55H55 Cinema Series and have the same problem every now and then, if you haven't already done so, go to the picture settings and scrolling down to conversion and it will take you through 3 steps of adjustments,there is a white cross in the middle of the screen line up the red first and then the blue, it will then take you to a screen with numbers, ID the clearest number and exit out, you should have a clear picture again. I hope this helps.