SAMSUNG CL21B501HL with green screen
Televisor Samsung CL21B501HL
Televisor Samsung CL21B501HL
Hi . With all components in place and welded all in place, remove the plate from the tube. And carefully measure the tensions again.
Of each cathode and video signals. (RGB) comment.
He does not comment if Kr made a good review of welds to the entire tube plate.
It can be the bad tube. We will see.
Hi Luis, eh soldier the resistances again and remove the plate from the tube, the tensions are the following.
KR; 182.3v KG: 164.5v KB: 163.8v
then I solved the entire plate and the values of the plate removed from the tobo are the same
Check everything related to the red circuit. That the one that works the other 2 for me is fine.
Also place THE plate and see what color you throw. You may throw red and measure the RGB.
Thank you very much Friend for the support .... I got the opportunity to review it quietly and your comment was effective .. 4 transistors were apparently fine but at the time of operation they do not work properly ... change these transistors. I carefully checked and found two cut tracks and finally gave an image ... then a couple of additional fault readjustments but without much relevance.
Once again thank you very much .... I already had a crazy ticket that did not find the fault ..... Greetings .... and I apologize that I can not describe it as an answer since I make valuable comments
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Great dear .... thank you very much for the support.
I will check the transistors ..... I have connected the cathodes again and there if the current 185v: KR, 187v: KG and 185v KB is matched (with screen at the top and without antenna signal)
pins G and B short while still R at 1.56v which is lower than normal
The AKB return when giving power starts with 2.01 then when you turn on the screen it is set to 3.601 and no longer moves from there
I will perform the other tests you mention estimated. and comment
the voltages on the cathodes are too high ... x that motive will have a black screen ... measure the ABL voltage on the C414a ... there should be a positive voltage ... check the R410 of 20kohm and see if it is in its value or is open ... measure on pin55 ABL q, voltage has ... measure on pin43 EHTO q, tension has ... ok ..
Amigo I will consider it as a better solution since I am on my way to this fault and thank you very much for taking the time to help us and share your valuable knowledge. ... four transistors were wrong even though they marked well ..... I found two open tracks ... finally it gave an image ... the fault had already made me crazy since many of the voltages that I indicated were ok. Greetings Thank you so much ......
For the next measure in 200M scale the transistors and you will see that it occurs with the leak.
They measure as a diode. In one sense 1 in another nothing. If they are well.
B- C = 1
B- E = 1
Reversing the tips of the tester should not measure.
And that printed cut is always the first to verify with good light and magnifying glass. When you verify the welds.