Daewoo TV 14 inch
Good evening, I fail to understand the fault well, but it occurs to me to ask: Did you renew the resistor R814? Did you renew the + B filter capacitors? ... Measure voltage on the + B leg of the fly-back and only there when the fault appears, comment results ... Renew the capacitor of the 45 Volt Horizontal Drive C815. In some of these, this "fault" can be applied to what happens in certain Samsung chassis, which is responsible for the horizontal output transistor ... Check the state of welds in the jungle, if you have to remove all the old tin , remove the IC
Jungle and carefully clean the pins to be able to weld it again. Check welds in the voltage regulators for example if there is any KIA7809 in short one can think that this is welds in poor condition, do you have a magnifying glass? Do you have good lighting in the workbench?
I already changed the filters to 45v, I solved everything.
when the tv turns off, the secondary voltage is present
they don't fail
Friend I tell you to change all the components you told me
Quintero and the TV does not turn off. If I had taken more care of neg2013 I think it was ready. Thanks colleagues for the help. How do I close the question?
CN001A DTQ20Q1FS TV DAEWOO.pdf [4.02MB]
Greetings from Valledupar Colombia.
Thanks hand for trying to help me. I already retouched some but I am going to retouch more aver if it is solved
When the TV turns off, it is because the pulse goes out to the Q401, I don't know how many volts it has to be there, and I don't know which of the 2 integrated it gives them, if pin 27 of I101 or pin 37 of I701 someone asks me help with this fault
the voltage from the pin 27 of the jungle I101 reaches the base of Q401
Try disconnecting pin 37 from the micro, make sure pin 37 has no contact with the circuit.
What happens ???
While the TV is running, try to make the permanent measurement of + B and see if there are changes in the voltage at the time of failure.
disconnect the resistor R813 connected to the base of Q804 that passes ???
if the TV stays on, change C818 = 100uf 16V _ C819 = 4.7uf and C814 100uf 160V
R814 = 0.82Ω 2W
Goodnight. hand already disconnect r813 and the tv stays on.
I'm going to change the component you mentioned to me and re-weld r813 to see what
Describe what components I change so that the TV stays in operation, I understand that I do not replace either R814 or C814 if it is so I do not replace them and the TV is working well so there is no need to change them.
but describe what replacement for the tv to work
the assessment is given to those who participate with the opinions at the request of the applicant and the best accepted solution is given to the best orientation with which you have found the fault and the purpose is that the information serves other people, is in Your consideration of who gave you the best guidance.
This is what I changed. C818, C819, C814, R814 and change all of 16v 470uf that are close to the jungle and the TV did not turn off anymore. Thanks for the help.
ha and for my part I thank you for the help to you 2 neg2013 and quintero4hson thanks for helping me if I didn't run away if I do it for you I think I was still taking out the tv. 100 point for the 2
Incredible, do you consider that with the answer and question that you ask deserve the solution to your inconvenience?
It is assumed that the solution to the question that the user asks is given to the person who helps him solve the problem and qualifies himself as a goodwill valuing the contribution in time and knowledge made by the technicians, who give their time to help other people With your difficulties.
A real apology. I think what you want to tell me is that I qualify myself. If it is there, I apologize again ... I have time to solve some equipment over here and I see that it is not the same as before if someone gave me an answer there was the same way to qualify it and I was looking for it was to rate you and I was looking for Where to do the qualification and I did not get married if not more under your last question, I left is the solution so I gave there is. if you can tell me how to give the qualification to a partner please where it is done so that it does not happen again
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