lg ultra slim tv does not give stamby
Hello, if the owner told you about the horizontal line, it is very likely that the integrated vertical is damaged by changing it.
Friend Luis, I commented that you connect the bulb to the + by line of the pin + b of the fly, the TV turns on, but disconnects the bulb and does not turn on the voltage that I measured at + b when giving power rises and falls to 93 or it does not vary, but because it turns on normal with the light bulb in series it will be that I have a resistor failing or a capacitor
Friend Luis told you that the transistor S .H. It is damaged because it has damper and does not measure anything of course emitter collector. I will change it, by disconnecting the t. Measure + by arrive 93. According to 110 V and 0.9 VAC is fulfilled in the collector. Does the source feed is acceptable?
Roger wrote.
disconnect the t. Measure + by arrive 93. According to 110 V and 0.9 VAC is fulfilled in the collector. Does the source feed is acceptable?
Hi. The + b if or if it has to be 110v. In PW mode.
Where do you measure alternating current, (vca) collector from where?
Put the tester in + by without removing it from PW be as soon as you get to mark the tester without the TSH placed. Comment and we continue
The tv works connected or not the coil. Okay.
Now the series goes between the + by the flyback pin. So protect the TSH is NOT placed as you ask.
If you place the edge plate and the TV turns on, you have false contacts or printed cut. The other would be some component cut right on the pin. In the 3 cases when moving the plate makes contact reason for such result.
It is normal for hot PTC. If you measure it cold you will see its low ohmic value. I imagined when it reaches either 110v or 220v straight to its pins. This takes temperature and the resitive value increases to infinity. Reason that does not explode.
If the focus is placed on SERIES BETWEEN the + B and the flyback pin and the TV turned on, how much do you measure tension at both ends of the focus?
You say the TV turns on, ok, what do you see on the screen?
Good afternoon, I did not measure it but I will take it into account. friend the voltage of 180 must be present in stamby mode, or when giving power appears? I have that doubt but as I analyze it should be in stamby. Ah I connected the antenna and it looks very good and it also has fine audio. I think I check the line of 180 comments and continue.
You will notice where the 180v comes from. You only have 2 options. From the source or flyback.
When giving PW. RECENT the horizontal oscillates and delivers 180v. If you measure in ST you will have the voltage of + b. Look and see.
Good evening friend Luis. Still browsing with this TVE. I have done endless tests and nothing. At a source or protection circuit, the Q16 receives its normal jungle voltage. the vertical receives voltage on their respective pins. What I did was uninstall the Q16 to see if it turned on. but I still see nothing on the screen makes its swing but it is protected or falls at every moment in stamby. It is intermittent. Something strange removed the Q16 and does not turn on the LED. but placed turns on without giving Pw. Seeks to turn on and return to protection is a repetitive cycle. I appreciate your opinion
Good afternoon friend that TVE m has tangled and more to one the plane because there are circuits that do not appear on the board different resistors to those that the form brings. note that I measured hvcc which according to plan are 9, v at the output of IC 78R09API but m gives st. 0 and in power 4.5 this is low because according to it is 9 volts for the jungle. Change it and measure the same. something else sometimes turns on without giving it power. I really want to understand why the light turns on normally. I don't appreciate the contribution, but I won't give up.
If you have a 9v regulator there, you must leave the 9v if or if. Desolder the output and measure when giving PW if it delivers the 9v.
At the entrance you must have more than 9v. What does the source deliver?
If when you raise the output pin and the voltage appears, you have an altered component or one that is altered when working with tension. Some electrolytic for example.
This is not the diagram?
https://www.electronica-pt.com/esquema/tv/lg-esquemas-tv/lg-21fu1rk-chassis-mc-059c-4081/
What's up Luis . That is the diagram I am using. I will check that voltage and notice I can use the ground of the same ic. Or earth today. Or the land of the big filter. ? Another thing I put a light bulb between collector and emitter to see how this source is marked in stby 150 vcd in the ppal filter. but in the secondary outputs 84 vdc. When giving power rises to 110 which is what the diagram asks for. that's where it goes out and goes back to 84. measure the regulator voltages. Something I had not reviewed are the high voltage capacitors. There is a small one that does not register load.
Hi what transistor H had placed?
If you put a new focus on 200w series between + by and the flayback. as a test to avoid breaking the transistor again if something else is damaged. See what the focus is on ST. If you do not turn on anything just give PW. and measure the tension at both ends of the focus. Comment. If you turn on a lot disconnect the TV and see if it does not heat the flayback or the TSH.
Well, it is already good and everything is fine. I ask can I give power on without the demagnetizing coil. otherwise if I connect the TV to a series in the outlet I protect the tsh. Same.