here the friend diagram although there are components that do not match look fed up on the web and all have the same diagram for this KS9C chassis
https://elektrotanya.com/samsung_cl21k40mqgxxaz_chassis_ks9c_n_ray.pdf/download.html
wait for upload to download later
example I burn the Dz803 diode on the card has the ZP27 according to datasheet is 27v but in the diagram it indicates that the Dz803 claims to be 1N4742A according to datasheet is 12V, as well as the capacitors.
Greetings friend nicomena2015 on the 100w use serial lamp and also change it for another of 200w and it also illuminates and illuminates just connect it to the mains without turning on the TV, I will see if I can take voltage measurements in C812 in stand- by and in power and on the ic801 if I think it is wrong as indicated I will change it for a new one and if there is continuity between pin1 of the chopper and pin1 of the Ic801
Greetings friend Edson Tejada and if it seems that the regulator that I put to him that was of equal use was wrong, I will change it for a new one after that I will perform the tests that you indicate.
you tell me disconnect + B how do I do that friend? and when you disconnect + B from how much W would put the focus to perform the tests
hello: if the lamp turns on fully, it is xq, you have short in the source regulator or short in the rectifier bridge ... remove the (5q0765rt) and see if the lamps no longer light ... if it continues in them check the bridge rectifier and line filter ... you have a short in the primary ... ok
look: seeing your comment you say that, you have 12v on the pin 3 x the doubts with the tv off it measures the D805-813-807-806-in direct and in imbersa to see if there is no diode in short ... ok
friend remove the 5Q0765RT and follow the short after connecting it to the mains, check the rectifier bridge diodes and they are fine also check what you told me D805, D813, D807 are fine D806 does not exist on the card.
What confuses me is why? When I disconnect the cable that goes to the screen to demagnetize it and connect the TV to the mains there is no short.
what else can I check friends maybe something I'm ignoring.
Thank you for your prompt response. I will listen to your advice.
look colleague: the ptc takes a lot of intention at the time of turning on the equipment ... I already tell you more arriva ... remove the ptc from the circuit since q, this ptc is for another function ... it has nothing to do with the function of the source ... remove it from the circuit and give power and see if the lamps now turn on and off, it is straightforward ... or there is no short ... ok ..
Greetings Dear, a thousand apologies for not responding, I was sick but we continue with the TV fight.
I wanted to tell you that as you know I have a short in source and check rectifying diodes and they are fine, the R804 and R801 of 0.68ohm 2W is overheated, I decided to remove these resistance and the Ic801 was still wrong and I removed it, I also decided to remove the 4 diodes rectifiers, then I decided to connect it to the electricity network thinking that some of these that I removed were wrong thinking that when they were energized they fail, but it was not that way there was still the short film without those components.
I still haven't removed the ptc, friend nicomena this will be the problem although this ptc is new, it was the first thing I did
look friend: remove the ptc from the circuit as I explained ... remove it once if we are not always in them ... more if you are using a lamp between the TV and the electric network x more q, be 200w will turn on when the power is turned on but for a few seconds and then it has to go off ... to repair the source, remove the ptc if or if ... I don't know if you understand it, colleague ... and once removed the ptc energize the tv and the rectified line voltage should appear on the main capacitor of 300v or 165v according to the mains voltage q. have ...