⚡ Descuentos en cursos en video - Lleva tu aprendizaje técnico al siguiente nivel y aprovecha precios especiales antes de que termine la oferta. 🔥 Aprovechar oferta ahora 🔥
TVs

Doubt TV RCA vertical

Zulia1
Zulia1
38
hace 6 años
hace 6 años
Greetings friend, I get a 29 "RCA tv that I do not have the model at hand, with closed vertical failure immediately notice that the vertical regulator was replaced (TDA8177 installed) the client confirms that another technician had it without to solve and change a piece, I imagine it is the vertical regulator that I see, look for a TV scheme but these schemes do not give the original part number but bring their own identification and the vertical is U4501, look on the Internet and tell me that according to The RCA diagram this vertical is TDA8172 Are these verticals TDA8172 and TDA8177 the same, functional the same? I appreciate the information you can give me
manolo karvalo
hace 6 años

friend. measure the voltage on the 7 pins of the ic. vertical and upload results to see if volts are good. in each pin

Responder
Zulia1
Zulia1
38
hace 6 años

Friend the voltages are fine on pin 26 of the U12101 VDC Vertical 7.6V, on U14501-5) 13.7V, on pin 1) 9.8V, on pin 7) 9.4V ... the low voltages are on pin 6) 12.5V and in Pin 2) 3.3V in these last 2 pins should be 23V of power as is the plane. But I clarify that I isolate the power point by disconnecting the jumper and measuring 27V although it gives me 4 volts more than what is specified in the plane

Responder
manolo karvalo
hace 6 años

friend. I will tell you what you have to do before changing the ic. vertical for better guarantee although that is not your question you just had the doubt and they already gave you more help than you wanted now nose if you want to do the right thing

Responder
manolo karvalo
hace 6 años
hace 6 años
Hello Friend. before making the change of the ic. vertical you have to change the 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. and --- for your doubt those ic. verticals that indicate you work the same as ic. tda8177, these others, stv9326, an5522, la78040, la78041, stv9302, stv9325 and la78045 this you can place because it has more amps and is for that size of tv. And if I tell you as soon as possible in exchange, it is for a better guarantee. regards
Zulia1
Zulia1
38
hace 6 años

Greetings friends and thanks for the prompt attention: the voltages are fine on pin 26 of the U12101 VDC Vertical 7.6V, on U14501-5) 13.7V, on pin 1) 9.8V, on pin 7) 9.4V ... the low voltages are in pin 6) 12.5V and in Pin 2) 3.3V in these last 2 pins should be 23V of power as is the plane. But I clarify that I isolate the power point by disconnecting the jumper and measuring 27V although it gives me 4 volts more than what is specified in the plane

Responder
Zulia1
Zulia1
38
hace 6 años

Greetings friend Karvalo, sorry I had not responded but I was busy with personal matters and had neglected this repair.
As I mentioned before all the reference voltages are OK, replace the related filters and the diode too, the fault remained the same but I have detected the resistors 14508 14509 totally brown and the bands of colors blanacas all.
I suspect the fault is here but I don't know these values I hope you can help me

Responder
Zulia1
Zulia1
38
hace 6 años

Solution: Resistance R14508 of 1 Ohm changed its value, although it changed filters and related diode that that is never too much, it was working perfectly.
I thank friend Karvalo and Victor for their valuable contributions that led me in the search for the solution

Responder
Reparaciones similares solucionadas

¿Conoces una solución?

¡Aprende a reparar con estos cursos YoReparo!

4.93
(14)

Curso Reparación de Equipos de Audio de Alta Fidelidad

Maximiliano Resch
$ 60 USD
$ 20 USD
4.25
(8)

Reparación de Placa Main TV LED con el Ing. Picerno

Ing. Alberto H. Picerno
$ 40 USD
$ 20 USD
4.6
(10)

Curso Localización de Fallas en Refrigeración en Heladeras/Neveras On/Off

Yamil Alarcón
$ 29 USD
$ 12 USD
¿Tienes una mejor respuesta a este tema? ¿Quieres hacerle una pregunta a nuestra comunidad y sus expertos?
Regístrate gratis