TV Daewooplus Dark Image
Hello Friend. You just changed the ic. vertical there you didn't change anything else or if
Hello friend, it is not called vertical transistor, if not vertical ic, integrated vertical amplification circuit, the dark image is not related to the vertical stage, already within the settings menu and it was fixed that the brightness is not diminished, and also what happens when the flaybag screen control is increased a little, if the defect persists rectify welds in the jungle or video chrome on the ends of the cable connectors that go to the plate that connects to the trc barrel, also rectify this plate, fit the 180v line filter is 250v 10uf or 250v 10
Thank you for your response, I will rectify welds and measure and change what you tell me and tell you if the problem persists
I already did the brightness thing both for the menu and for the flyback, in the menu I have it 100% and with the flyback it does not improve only it turns white and with horizontal stripes
place those 3 150k resistors to mass and press the tv. Then measure the direct current voltage at home one. And comment. We wait
We will do a test to check the emission of the cathodes, rgb,
desolder and insulate well the pins of the three cathodes of the circuit
with a 10kohm resistor, weld a strand of the resistance to mass and with the other momentarily touch the pin that is in the air, isolated from the circuit, the corresponding color must be illuminated on the screen and with good emission, one of the exhausted cathodes It also causes the image to be dark.
If when testing the resistance there is no good emission of the cathodes, it is because the base that connects with the trc cannon is bad, change base first salu
if you are going to do the test that I indicated, place a mirror, so that you can observe while you try with the resistance greetings,
Perform the test as indicated and I could see that the colors are not very bright, red is the least intense of all, I have 5v at the entrance of the ABL resistance and 4.40 at the exit
Something I just noticed is that the vertical ic gets exactly hot, to the point of burning if touched, the image is opening perfectly
The vertical will burn if it warms up as it says. Must be ashamed with a little more than lukewarm. I'm talking about the ic. The body of it. Since if you touch the heatsink it should be hotter when absorbing the temperature. Do I place the IC of the same characteristic?
I put heatsink grease?
Did you squeeze it well?
What tensions feed it?
Second time I ask.
What tension does chroma have and each cathode?
Yes or if you will have to do according to your comment another test to discard tube. Or if you have another try. I will upload the test in the contribution as a possible solution.
I already solved the overheating of vertical ic, I put a good amount of thermal paste and better adjust the screw to the heat sink, I turned it on and it was practically cold, just a little warm, I have in KG 181v, KR 182v and KB 179v and the vertical ic voltage is 15.9v
I'm glad that's just the vertical temperature.
Now you say you have that cathode tendon at home. But just at the start of the flyback how much? After the diode always.
I see you did not do the recommended test.
I already did that test and in fact I passed the voltages in them, and I wrote that the colors were opaque and that the most opaque was the KR, I just need to share the chroma supply voltage and the resistor test, something more I want to contribute is that today I talked to the owner of the TV and I tell myself that I left it on for a long time when the image was closed due to the problem of the vertical ic, which no matter what I was in that condition I placed it in the music channel and left it like this for a long time, it was where I came to the conclusion of the low screen