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How can I lower the voltage + ba the tv source Sharp with strw5453
70
hace 5 años
hace 5 años
Friends, I have a charp with the short flaybak, the one I have is 110 and this TV has 130 vol as I can reduce the voltage to this TV if the TV does not have optocoupler or tl431 because in almost all those that have these components if I could go down but this does not take reference from the cold to the hot part.this is the model.sharp_21v1-l_chassis_ga8.Here is the download link if you can help me greetings.
https://elektrotanya.com/sharp_21v1-l_chassis_ga8.pdf/download.html
70
hace 5 años
Friends had to go on a trip as far as this arrangement resolved a flay of 130 vol and I adapted it. I think that the best thing is that it was not going to be that I had screwed up the str with the events and so I kept the other voltages but of all many fatty forms for their contributions.
47.894
hace 5 años
hace 5 años
[i] Let's see, to decrease the + B (130V) you can connect to the line that feeds pin 4: VCC of the STR-W5453, the end of a pre-set between 22K to 47K, set to 50% of its value; at the other end of this pre-set, solder the terminal of a 2.2K fixed resistor and its free terminal can be soldered to pins 7: OCP or 6: FB of this STR-W5453.
Now, once this reform is done, rotate the pre-set very slightly, decreasing its resistive value, the + B will also do so. By decreasing + B, the other 2 tensions provided by this source in their secondary school will also be proportional.
Regards!
Joansoler. [/I]
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