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Tube TVs

Hyundai TV chassis KD-031; Problems with the colors.

Televisor RCA TV

Televisor RCA TV

Ariel Iglesias
hace 5 años
hace 5 años
I have a Hyundai chasi kd-031 TV, the color predominates green, the transistors that go to the cathodes of the tube are not the same, it seems that they already changed them at some point, I could only see the license plate of one C2682, I would like to know by which I can replace them. I have some with registration C2688, can you tell me if this can be the replacement?
manolo karvalo
hace 5 años

friend. that transistor c2688, which you say you have are the originals according to the chassis kd-031, read below

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manolo karvalo
hace 5 años
hace 5 años
Hello Friend. according to the chassis number kd-031, which you mention carry on the insert of the trc. the 2sc2688 transistors. those that you have are the original ones and the replacement is the kse340, 2sc2611, and also check the resistances that are not altered or shortened. Cheers
Ariel Iglesias
hace 5 años

Thank you very much I will make the change

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manolo karvalo
hace 5 años

okay.

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Ariel Iglesias
hace 5 años

Colleague had told you that the transient I found was c2682, which was the only one who had seen the license plate, it turns out that when I desolder to change the other two are BF422, tell me if I can still change by c2688.
thanks

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manolo karvalo
hace 5 años

friend. I found in the diagram that the original transistors that TV has. in the tube insert are those, c2688, I tell you this because you say in the question that you have transistors of those c2688. That's why I told you to color them because those are.

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manolo karvalo
hace 5 años

friend. place it open what happens and check the three largest resistors

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luis tartaglia
hace 5 años
hace 5 años
Hi. I think that if they changed for sure it worked well. what you have to do before changing something. It is to measure the chroma tensions at the exit of the flyback and each one of the cathodes and inform them. That is part of a technical report that you should always do when asking for help. You say that the color green predominates. That means that red and blue has. Or isn't it? Perform a performance test on the tube. Comment results.
Ariel Iglesias
hace 5 años

I tell you that red does not appear, green predominates and when something comes out on the screen that has blue it has

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luis tartaglia
hace 5 años

I already told you what to do. First do that then see. I can tell you many things but I would be talking baseless.

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Ariel Iglesias
hace 5 años

Ok, you're absolutely right, my bad, I'm going to make those measurements and I tell you. Could you give me some range that there should be in these measurements.

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luis tartaglia
hace 5 años

I will only tell you. Black tip tester to common mass, either from the tuner or better thus work more comfortable tube mass. (bare wire or mesh)
Red tip measure on the pins of the tube socket. All in DC scale (DC) 1000v.

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