premier tv does not turn on
Desolder the Vcc pin of the regulator that is not printed. And it measures in the latter the voltage or in the R that feeds it from the diode bridge.
Look at the data of the regulator.
http://www.datasheetcafe.com/str-w6753-datasheet-pdf/?gclid=Cj0KCQjw5rbsBRCFARIsAGEYRwcDpH2HMJqM2D7l-3SNXxBrxWuYPaGElkLTIzhE-K41J4OGuyPVaSYaAwwBALW_AAwwRE
good I did that, remove the load and put a focus of 75w, and when connected the tv the light turns on and once low its intensity, I measure the + by and in 17v ... what if I see that the str is 10v coming to your vcc and according to your datashet should work with 35v, it's a str6753 .. thanks for the help am igo javier greetings from venezuela
Keep the probe set to + B in both STAND BY and ON.
The moment the bulb turns on the ON command ..... how much does the + B voltage reach.? '
Check the good condition of the + B filters, amplifier error circuit, optocoupler in the secondary stage and polarization elements in the regulator in the primary stage of the source, watch out for dry filters and leakage in the diodes, specifically the Zeners.
In this way until the nominal value of + B is recovered
Keep in mind that in STBY state the voltage will be low and you should measure to the ON order that it is where it rises to its required voltage, and it is normal for it to fall again as this with the substitute load (focus).
This is due to lack of power at the source.
Check the good condition of the indicated elements.
Thoroughly verified the components in the primary and secondary stage of the source, invites to think about a STR malfunction.
Will there be any other inscription on the main board or mainboard that can serve as a reference to look for a diagram?
this is the diagram but noc looks good
http://www.datasheetcafe.com/str-w6753-datasheet-pdf/?gclid=Cj0KCQjw5rbsBRCFARIsAGEYRwcDpH2HMJqM2D7l-3SNXxBrxWuYPaGElkLTIzhE-K41J4OGuyPVaSYaAwwBALW_AAwwRE
this confused me
https://www.yoreparo.com/ver-adjunto/aHR0cHM6Ly9jZG4yLnlvcmVwYXJvLmNvbS91cGxvYWRzL2RlZmF1bHQvMDAwMy81OC9jdHYyNjQ
Some manufacturers assign that band to indicate the material from which the R. is made.
If we are talking about the source R820 (the first number is not readable in the diagram) then it indicates that it is 200k.
friend javier look what is happening with this tv, there are times that I connect it and turn on the stamby and other times not ... when I turn on the stamby the egundarion voltages go down by half ,,, and when the stmby does not turn on it gives me the voltages secondary well
Is there any action on TV to order ON in any case?
, that is, when STAND BY turns on and when STAND BY does not turn on.
When you do not turn on the STAND BY heat the microprocessor oscillation crystal pins and observe effects
then it is in the hot source where the fault is starting from the large filter that is there and soldering the leg of the plus + B in that sector are some capacitors and low value resistors
solder the regulator legs and measure the voltage to see how much it is measuring there tell me the number of the regulator
you looked for the datashet of the regulator and verify the voltage is input and the output solder the leg three 3 which is vcc and measures and comments
74v and it drops to 10. Much is.
You must have 35v I think.
Change the regulator. First, control that line that measures R exactly in both directions. Diodes