Good morning. I am a beginner in electronics. In the forum they told me the correct way to take the voltages in the fly back. As seen in the figure. The question I have is .. On pin 5 of the fly back is marked on the 180v card. That voltage is alternate or dc. I explain. If I put the multimeter at point c410 in DC I have a reading. And if I put it in alternate, I have another one. Which of the two is the one that is related to the 180v marked if they are different. . If you clarify that topic, I thank you. Thank you.
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Good morning. I am a beginner in electronics. In the forum they told me the correct way to take the voltages in the fly back. As seen in the figure. The question I have is .. On pin 5 of the fly back is marked on the 180v card. That voltage is alternate or dc. I explain. If I put the multimeter at point c410 in DC I have a reading. And if I put it in alternate, I have another one. Which of the two is the one that is related to the 180v marked if they are different. . If you clarify that topic, I thank you. Thank you.
doubt with voltages on flyback
hace 6 años
hace 6 años
Good morning. I am a beginner in electronics. In the forum they told me the correct way to take the voltages in the fly back. As seen in the figure. The question I have is .. On pin 5 of the fly back is marked on the 180v card. That voltage is alternate or dc. I explain. If I put the multimeter at point c410 in DC I have a reading. And if I put it in alternate, I have another one. Which of the two is the one that is related to the 180v marked if they are different. . If you clarify that topic, I thank you. Thank you.
65.783
hace 6 años
the tension present in the pins are not dc as the colleague said, that tension is formed by the horizontal sawtooth and with a tester is very difficult to measure, if with an oscilloscope for example. the only measurements with the tester are made after the rectifier diodes and there if there is tension dc or cc.
17.741
hace 6 años
Yes. That's clear to me. What should be measured after the rectifier diodes in what I have not gotten out of doubt is .... Looking at the diagram you send. When placing the tester on c410 in dc. Should I give 180v? (which are marked on the pin of the fly back) only gives me 145 dc but if I measure at the same point with the tester in ac gives me 290v. I do not have much experience in electronics.
hello- if you had commented on the tensions in your question was another answer from colleagues - the + b is 110v-
47.894
hace 6 años
hace 6 años
[i] Let's see, the figure is quite eloquent, it never states that the TENSION present in the pins of the FBT (Fly Back Transformer) is DC or CC; on the contrary it explains and graphically well, that the screen printing (voltage values) printed on those pins corresponding to "+ 15V", "-15V", "180V" must be measured in the filters connected to the output of the fast diodes used as "rectifiers".
However, the voltage measured on C410 or on any of the other capacitors, enclosed in a red circle, should ALWAYS be measured in DC or DC and NEVER in AC.
If on C410 you came to measure just 140V DC but at the entrance of the FBT there is a lower + B (for example: 110V to 125V), then C410 is devalued (dry). As long as you have assured yourself before, that the horizontal section of the Yugo is not disconnected, defective (open or cut) nor is there a track interrupted in its path that would practically leave it out of the circuit.
Regards!
Joansoler. [/I]
405
hace 6 años
hace 6 años
what colleague victor says is correct, if you do not have the indicated voltage change the c410 and if necessary the r408 and d405. the voltage can only be measured with the TV on. regards
hace 6 años
Yes. That's clear to me. What should be measured after the rectifier diodes in what I have not gotten out of doubt is .... Looking at the diagram you send. When placing the tester on c410 in dc. Should I give 180v? (which are marked on the pin of the fly back) only gives me 145 dc but if I measure at the same point with the tester in ac gives me 290v. I do not have much experience in electronics.
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