This time we arrived at the service workshop a Samsung CL21M16MN television model that came completely and with the flaws I will mention below and for you to get an idea if at some point also have this problem .
It should be mentioned that this is a recurring fault because many of us have come up with this failure and in this way we can infer that this can be a constant failure ... this Samsung TV had problems or the following faults: the TV does not turn on, the LED) flashes, the output voltage on stand by 125v, by pressing the supply voltage, the voltage increases to more than 180v.
All these results were obtained from the first test which was carried out on the Samsung TV, until this first test of which we had no result could be the fault, it was necessary to make a more exhaustive test and to determine exactly the fault.
Troubleshooting Samsung TV does not work
When we did the first test on this Samsung TV, I realized that there was something strange as far as the standby, usually this TV is usually between 85vdc to 95vdc when it is in perfect condition, so if we have 125vdc with the TV, they are the signs that this Samsung TV has something wrong in the power supply or power source.
The 125vdc should be at the moment it is transmitted to the TV because that is the voltage at which it works, but the 125vdc before lighting actually reflects a fault. Logically, this measurement is done at the output of the chopper transformer.
When we turn on the TV, this voltage rises to 180vdc and the TV is turned off by a protection, if we insist that the contact continues to occur, ie the TV is turned off. After performing basic source measurements and verifying each component of the source, we conclude that it is a failure in the chopper ... for those who do not have an idea of what the helicopter is the transformer that is at the source of power supply or TV.
samsung tv diagram In the following image, there is an excerpt of an electronic diagram of this Samsung TV in which we detail the origin of this problem ... this transformer is not fully crossed or open, if it 'is not modified or reheated because otherwise it will no longer have there been voltages in the power supply or maybe the fuse has been opened.
So do not forget the symptoms in which this samsung tv was and for its solution, just change the hash transformer and modify some source capacitors as a precaution ... do not forget to mention to the owner that this TV must be disconnected so that no continue to change the power supply.
In this video, I want to show that the defects of this type of TV do not only occur at the level of the power supply, ie source, horizontal, etc. This can also occur in the logical phase as in this brand and television model, which is a Recco. This failure occurs in Samsung, LG or any branded TV, so it is often important to throw another eeprom because Samsung does not need to have software inside the eeprom.
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