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TVs

Good, I have a Toshiba TV model CF27C30 Chassis 9350 vertical failure.

jjjjjhoan
hace 6 años
hace 6 años
Well, the TV at the beginning had the short vertical that is a TA8427K, I changed it to a good one and the fault persists.
axel stone
hace 6 años
hace 6 años
you should check the VALUE of 3 components in the vertical stage one is the DIODE that is there that is next to the Vcc power supply of the VERTICAL IC, which comes from the flyback, the other 2 components a LOW VALUE RESISTANCE in some equipment has 1 , 5 ohms and another 1.8 ohms the other is a capacitor in series to this resistor that is 470 uF for 35v and that fault happened to me and they were those components described above, also measure if there is Vcc voltage of the vertical ic this comes of the flyback by means of a high speed diode and a filter here I show you a photo of what I am trying to tell you: [url=/ver-adjunto/aHR0cHM6Ly9hZGp1bnRvcy55b3JlcGFyby5jb20vZGVmYXVsdC8wMDA0LzgxLzEtNjU0NjQuanBn] [img] /js/ckeditor/plung/bta.2.k3/b2.jpg/ch2.jpg/ch2.jpg CLEAR THIS IS AN EXAMPLE, AS THE ORIGINAL DIAGRAM OF THIS TV IS ANOTHER, IT IS A GUIDE
axel stone
hace 6 años

It is not the replacement, it is an EXAMPLE, since the vast majority of TVs have that configuration in general anyway, it will see if it is the same or not and I will post it and look for the chassis number and others to observe the original components.

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axel stone
hace 6 años

greetings there clarify it manolo karval

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jjjjjhoan
hace 6 años

I just read your comments I thank you for your help, I commented a little more the TV previously had not closed the screen completely, it had about 10 to 15 cm open the image horizontally, with some lines at the top and the bottom equally which apparently is the typical fault of one or some damaged electrolytic, change the C306 3300mf x 35v, C308 220mf x 35v, C301 2.2mf x 50v then the screen opened a little more but not completely, leave it on to take some measurements and after 10 minutes the R327 of 5.6 Ohm began to smoke.

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jjjjjhoan
hace 6 años

And the TV screen was closed and I have a line from side to side horizontally take out the IC I measured the leg 1 with the 2 in continuity and it gives me short, I went to an electronics store I bought it new but the screen does not open.

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nicomena2015
nicomena2015
9.501
hace 6 años

friend. does not comment that, voltages have on pins 6 and 3 of the vertical lc ... measure q, voltage of + b has in the C884 in source ... it must be according to the scheme in the 115v in C884 ... the R327 of 5 , 6ohm if smoke can be q, it is already damaged or opened maybe x excess temperature q, you do not control ... I must change it x the same value of 5.6ohm x 2w .... I must check if the vertical lc It is well attached to the decipator ... I must measure the voltage q, it reaches the pin6y3 of the vertical lc ... I must turn off the TV if you see q, the vertical ic raises excess temperature ...

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nicomena2015
nicomena2015
9.501
hace 6 años

check the D301 and see if it is not leaking ... or you change it by 1n4007 ... the electrolytic ones, change put them in the same position q, the originals ... verify that well since, if you put any reverse burn the vertical lc ... the C301 of 2,2mfx50v I do not see it in this scheme .... comment here, components are connected ... make the suggested measurements to see if the vertical lc receives its correct voltages ... When the TV starts again, touch the temperature on the vertical LC with your finger ...

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axel stone
hace 6 años

jhoan do what is recommended by the colleague nicomena and post the voltages here

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jjjjjhoan
hace 6 años

Good, here are the measurements of the TA8427K IC sorry for the delay, all the values are high and the IC does not heat. I will continue making other measurements.
Pin2: 28.8v
Pin3: 30.2v
Pin4: 18.7v
Pin5: 19.0v
Pin6: 30.8v
Pin7: 19.5v

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axel stone
hace 6 años

Pin2: 28.8v PIN2 = 14.5V the output voltage is always half of Vcc of the vertical ic, this ic IS SHORT
Pin3: 30.2v PIN3 = 28.6V very high voltage from the flyback, you must check components
Pin4: 18.7v PIN4 = 0.9V from 0.9v to 18.7v there is a huge difference
Pin5: 19.0v PIN5 = 0.7V from 0.7 to 19v there is a huge difference
Pin6: 30.8v PIN6 = 28.1V very high voltage should be lower
Pin7: 19.5v PIN7 = 1.6V from 1.6v to almost 20v this integrated is OUT

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axel stone
hace 6 años

you must change that IC pro before this please check D309 if it is possible to change it, change change C310. there it must be 28v and I observe that it has 30.2, it must stabilize that voltage, although possibly with the NEW IC it would go down 1v or more ... but the same as the vertical ic that it has mounted there is short and the voltage of pin 2 betray ...

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jjjjjhoan
hace 6 años

The IC was damaged and that avia bought it again that headaches gave me that TV. Solution Change the Vertical IC Thanks to all who helped me especially to axel stone that helped me until the last.

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axel stone
hace 6 años

You're welcome, my friend, I never abandon the soldiers if I'm the general in charge and I'm glad that you have repaired the equipment, I am as happy as you are, I also appreciate the contributions of as many colleagues as Nomenaa that helps a lot of people "I included "

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nicomena2015
nicomena2015
9.501
hace 6 años
hace 6 años
hello colleague: collaborating with colleagues; measure if you get the 28v of power to pins 6y3 of the vertical lc-TA8427K - .. if that's ok ... measure if you have the 14v on pin2 .... change the C308 of 220mfx35v taking care of the position and polarity like this the original ... check or change the C306 of 3300mfx35v ... check and measure the R305 of 0.82ohm and see if it is not open or devalued ... pin1 is mass .... pin4 = 0.9v .... .pin5 = 0.7v .... pin7 = 1.6v .... check connection to the yoke ... measure impedance or resistance of the vertical windings at the ends of the R336 of 270ohm ... greetings !!
Javier Chavez C
hace 6 años
hace 6 años
Download your diagram here: Toshiba CF-27C30
manolo karvalo
hace 6 años
hace 6 años
Hello friend if you have a line in the middle from side to side on the screen - before changing the ic. vertical you have to change for new filters that are related to the ic. vertical, and change although the diode that feeds the ic is good. vert. If the fault persists, check the resistors that feed the diode, whether it is powered by the flayback or the choper. regards
manolo karvalo
hace 6 años

friend. look at the diagram they sent you

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