⚡ 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 🔥
Audio equipment

Pioneer XR-A370 / D equipment. No Audio Out

Nerio Machado Electronic
hace 5 años
hace 5 años
Good morning colleagues, I have a Pioneer sound system model XR-A370 / D with audio problems since it was not heard even by the headphones, in the review I measured all the transistors on the audio board (Power Mosfet, Power Regulators Positive Voltage and Shottcky Diode), also the diodes, all in good condition so I deduced that it was the IC STK 407-070B which was replaced, when testing it turns on everything well, the relay is activated but there is no audio output, If you could assist me in this failure or what other components should I review. Thank you.
Medea
Medea
166
hace 5 años
hace 5 años
Hi, in those teams the headphone jack does not go through the STK. Your problem is in the IC that processes the audio. You have to have an audio probe (it is a small amplifier with a speaker) and check whether or not to add audio to the headphones. The most likely not to reach you. Find the datasheet of the audio processor and you can verify that audio is not coming out of it. With the datasheet, check the control signals of the same. Tell us how you advanced in the diagnosis and we can help you more. Regards.
martin villegas
hace 5 años
hace 5 años
Dear nerve: check the sound input in the stk if you can with a better amplifier, another part that may be failing you, is the input of headphones, dvd, etc, check them out. and a part that sometimes we forget are the speakers that are not going to be short, open, etc. remember if you get sound to the stk is forwards stk circuit, some transformer etc, and speakers. but it is back pre amplifiers, resistors etc etc. luck with your fault and comment ah and remember that in the electronics not always new means without failure I have bought ic with wrong outputs
martin villegas
hace 5 años

dear medea: I agree with you, only the user comments "since it was not heard even by the headphones" that's why the comment is otherwise right

Responder
Nerio Machado Electronic
hace 5 años

God Bless you, Good evening, dear colleagues Martín and Medea, yesterday I did a test by directly placing a speaker to the LYR outputs that come out of the STK and if it has Audio and increases and decreases the volume, but with the audio somewhat distorted that is not clear in the audiò, but when placing the speakers in the back of the equipment and in the headphones there is no audio signal, I thank you again for your suggestion.

Responder
martin villegas
hace 5 años

I think you already tested the speakers alone on another device, if your speakers are fine, you have a problem with the amplifier stk go with the amplifier go tracking your signal to where the output. The distortion is often by filtering the first thing is that the speakers are heard, from the headphones take the audio signal of any channel and track it following your diagram at some point you can have an open component or open vein ah and check the input of the headset sometimes it acts like a swich and when it doesn't close internally you don't have audio output on the speakers keep commenting

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
4.73
(22)

Curso Reparación de Fuentes Conmutadas de PC y Equipos Electrónicos

Maximiliano Resch
$ 40 USD
$ 20 USD
4.64
(11)

Curso Electrónica para Reparación de Placas

Santiago Cediel
$ 29 USD
$ 11 USD
¿Tienes una mejor respuesta a este tema? ¿Quieres hacerle una pregunta a nuestra comunidad y sus expertos?
Regístrate gratis