DAEWOO DTQ-20V8SSFG, try to turn on and off (protect yourself)
Televisor Daewoo DTQ-20V8SSFG
Televisor Daewoo DTQ-20V8SSFG
the diagram here
https://tecnicoreparacion.blogspot.com.ar/2012/02/cn-001g-diagrama-tv-daewoo.html
Marvin Comment on how much the + b actually accommodated.
I would change the electrolytics of the primary source. Comment on the line voltage and that of the main electrolytic.
Change the electrolytic + b of 100uf x 160v. And control R 814. The latter must be exact. If you don't have the 5v in memory on your pin 8, desoldered and measured in print if set. Comment results
Comrade Hector Comrade Marvin of the question says that he has a high b + if that is the way OCP protection will always protect him if b + does not come down, so he has to make the stage that takes the sample work well and that is injected into the primary so that the regulator does its job well, to pass less or less secondary voltage in this case.
When you make changes, try to measure the b + to see if the voltage is already correctly restored, because if the b + in the stable 133v is still protected then you have to keep looking for some other protection circuit that is being activated or even the fault could come to be the protection circuit itself.
Marvin wrote.
B + that there should be 133V was 164V, in the voltage that should have 12V it was 18V, when checking the resistance R878 that should be 100K it gave me the measurement of 130K, I replaced it with a 100K and I already have the closest values with the exception of memory (eeprom) that should measure 5V and I only have 3V. Even the TV does not turn on,
Luis Tartaglia, regarding R878, Marvin wrote:
... I replaced it with a 100K one and I already have the closest values ...
But that's not all because Marvin also wrote:
... where there should be 18V there is only 14V in the secondary of the power source ...
It is easy to say that the source is in the Standby Mode (STAND BY), and thus ALL the tensions it provides in its secondary are somewhat diminished. it would be idle to specify why?
As long as you do not solve the decrease of "+ 5V", you will not be able to obtain a correct power-up order from the Control Stage.
I was idle by not thinking well. If you don't have 5v, you can't give PW. You will have to control the above. Memory. Micro. Receiver unlinked one at a time. And see if it stabilizes the 5v.