Hello I have a big problem I need the schematic of power supply of my combo emerson EWC1903 I live in México I can't get the diagram I hope you can helpme ....my email is. email@example.com Thanks for advance.
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Re: tv off by itself.
Oye tu problema es que el sistema de la vcr esta fuera de tiempo,trata cambiandole la banda de el motor de carga ya que si esta se encuentra desgastada patina y haceque el micro detecte error y por eso se apaga el televisor.Suerte.
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EIther the power supply is faulty or the power switch itself is faulty. You can test with test light or ohmeter to be sure the switch is ok. You can use voltmeter to check power from supply to main circuit board
If you get channels 2 to 13 nice and clear but the rest are snowy, it means that the TV is set to the broadcast channels, which means that for the channels above 13 it is tuning in the old-fashioned UHF channels. If the TV is set to the cable mode then it tunes in cable channels above 13. To do this, enter the menu and navigate to the tuner settings, set the tuner to standard cable and then do the autoprogram, and the tuner's memory will be set for your cable system.
The sound can be called screaming from the power supply,it senses a short and creates a frequency you can hear,the set has a problem and it needs to be repaired,I will check the horizontal out put transistor for a short,sometimes it goes bad without a reason and sometimes the high voltage transformer is also bad and both have to be replaced but first the transistor only if it goes bad again then you replaced the transformer too.Seek assistance from a servicer if you are not too familiar with tv service,it can be dangerous.