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Re: Zenith A25A11D No Red Color
If you are comfortable working with a soldering iron, a continuity (VOM) multi tester and a fair knowledge of electronic components, then perhaps you can repair the missing color red.
You have to open the unit, expose the small printed circuit board that is attached to the small end of the picture tube. There will be many components present but you will need to focus yourself on three (3) transistors that are bigger than the others sometimes with an aluminum heatsink. It is also possible that instead of 3 transistors you will have one power IC. In any case these control and provide the drive for the 3 colors of your picture tube: red, green and blue. One of them is either dead or suffers from cold solder to any or all of its pins/legs. You have to visually inspect the solder joints of these big transistors/IC and determine if any is dull in color, loose of simply not connected. You may even try the shotgun approach and solder each of the pins/terminals/legs just as long as you don't cross solder creating a short between pins/legs.
If this works, you're set, if not:
You have to check with the use of the VOM and determine which of the 3 transistor is defective. If you are familiar checking continuity of base to collector to emitter and reverse, again you're set, if not perhaps you check all three and compare which have the same reading from the same position and which is different. Pls keep in mind the transistors have forward and reverse bias readings. If able to determine defective component, desolder, replace and solder. If it were an IC, replace the entire pack.
If the above would make you uncomfortable, pls ask for the services of a qualified TV repair man and explain your problem.
Hope this works out for you and give you some ideas. Pls post again how things turn up, good luck and kind regards.
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You might have the yellow for video, white, and red for audio (composite connection) plugged into the component plugs green, blue, red for video, white, and red for audio (component connection) somehow combined together on the back of your TV to whatever source your watching.
It should be color to color from your source to your TV.
It's that or only the green plug is plugged in for the component video. Hope this helps.
Hi Thanks for using FixYa. Usually
this happens when the Light Engine has gone bad, and I should say this is a
common issue with Projection TVs. There are three tubes/mini LCDs inside your
TV- green/yellow, blue and red. When the set heats up over time of usage the
screens tend to break resulting in leaking color everywhere. The cost to get
this fixed by a professional should be around $300 depending on the parts that
needs to be replaced. Please do accept the
solution if the issue is resolved or else revert for further assistance. Thanks Rylee
the problem is at the crt base .there r three red,blue n green o/put.verify if there is dry in the soldering n check the red cathode voltage it must b around 150 .if not then check the resistor that feeds the red o/put.it could b 12 to 15k.
all crt have 3 driver color red blue n green,whenever one driver not working the color changes.that wat happened to ur tv
now i do not know wat model u have.the drivers may b transistors or now its ic that r being used like tda 6103q.best of luck
The huge yellow circle is either your blue filter is burnt out (very common in Zenith DLP) or you LCD cube is bad. I would bet it is the blue filter. Zeniths DLPs have 3 color filters one blue (a pinkish color), one green (a grayish brown)and one red (it is red). For the bulb indicator I would check and make sure your lamp is seated to the ballast correctly. Just take it out and put it back in.
Hi...the yellow haze is probably the blue filter is burnt and needs replaced. This is very common in Zeniths. There are 3 color filters in the Zeniths blue (pinkish in color), green (grayish in color) and the red (it is red). The #1 problem in this TV is the blue filter is burnt and it is an easy fix. It could also be the LCD cube is bad. I would try the blue filter replacement first. It will probably do the trick.
The blue filter is burnt out. A very common problem in Zenith DLPs. There are 3 color filters, 1 blue (a pinkish color), 1 green (a grayish brown) and 1 red (it is red) they give you your colors for you picture. This is a simple fix.
The blue filter is burnt out. A very common problem in Zenith DLPs.
There are 3 color filters, 1 blue (a pinkish color), 1 green (a grayish
brown) and 1 red (it is red) they give you your colors for you picture.
This is a simple fix.