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Power Crown 5002 VZ A relay is not activated.

Jaime Alonso Olivo
hace 6 años
hace 6 años
I have a Crown 5002 VZ amplifier, which one of the channels does not activate the 24V relay, I already remove the relay and it is activated by applying 19.9 V, and check the diodes, 10K resistor and MPSw42 transistor that activate the relay and are good, I already changed circuits like the LM393, LM339N, M7555, Optocouplers MOC3011 and MOC8021, etc., Check all the veins of the module and there is continuity, transformer is good. The good channel voltage gives me 94 V at the capacitor level of 15,000 uf / 110V and the problem gives me 45 V without the relay being activated. The 24 Volts perfectly reach the D703 diode which is part of the circuit that activates the relay. I think I have to change the relay that I have not been able to get since I have the doubt that I will work 100% less than what you think. Many thanks in advance and I hope your help. Balance amplifiers work perfectly, veins are bridged.
JPelectronics
hace 6 años

Jaime Alonso checks the front LEDs that help us more or less to locate the fault or in which section it is ... greetings

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Jaime Alonso Olivo
hace 6 años

The problem is already solved. The fault was on the main card of the U211 and the bad circuit was the LM339N on the right side Thank you.

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Quintero4hson
hace 6 años

Hello friends, Mr. Jaime Alonso, the ideal is that you close the question with the accepted solution so that you do not continue giving your opinion on this issue that has already been solved.
I don't know if you have the option that says Do you know the solution? share it If so, comment on how the problem was solved and press the button for the best accepted solution or if you consider that any of the opinions lead you to the solution, then it will be up to you to do the pertinent thing to clarify the solution of the issue and close.
Greetings from Valledupar Colombia.

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Quintero4hson
hace 6 años

Take the opinion you gave as an accepted solution to close this topic, do you see the button for the best solution?
If so, take it to close the question.

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Quintero4hson
hace 6 años
hace 6 años
Hello friend Jaime Alonso, if as you say that the relay is activated with 19.9V it would have to be activated the same with 24V and to indicate that this bad would be enough if it is not activated or that the contacts are not properly serrated, otherwise I cannot say why I don't have the diagram. Greetings from Valledupar Colombia.
Quintero4hson
hace 6 años

Have you focused on looking for damage at the source, have you checked the status of the amplifier's output?

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Jaime Alonso Olivo
hace 6 años

quintero4hsor, it occurred to me to comment that before having the relay problem I checked the output amplifiers properly repaired, the characteristic problem of this amplifier is that due to the corrosion some veins had no continuity, I even changed the left amplifier to the right and still So the relay problem followed me, there is no short in the output everything was reviewed. One channel works perfectly, in the other there is 45V voltage due to the relay problem that is not activated. I will try to get the new relay and I will try. Thanks for your comments.

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Jaime Alonso Olivo
hace 6 años

quintero4hson, probably the relay contacts do not close properly so I will have to definitely change the relay. We are in communication and I will tell you the result.

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Quintero4hson
hace 6 años

if in doubt with the relay, exchange it with that of the other channel and leave the doubt

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Jaime Alonso Olivo
hace 6 años

Thank you for your suggestion, the plate where the relay goes is that if it is active it is a bit battered to have as I manage. Tomorrow I remove the relays and do the exchange. Thank you.

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Jaime Alonso Olivo
hace 6 años

I already exchanged the relays and they are both good. I'm out of doubt and now I'm going to look for him on the main card. We are in communication and I will tell you the result.

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Jaime Alonso Olivo
hace 6 años

Finally I found the problem and it was on the main card specifically in the U211, that is, the integrated circuit LM339N, which is the one that gives the signal or stimulates the relay diode. Thank you very much quintero4hson for your tips.

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Quintero4hson
hace 6 años

Hello friend, I am glad that you could find the fault and that you have shared the solution.
it will be that the diagram of the Crown 5000VZ amplifier can be the same or similar to the Crown 5002VZ amplifier

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Quintero4hson
hace 6 años

Your contribution to this fault would be very good to appear as a solution since the information always helps those who have similar or equal problems.
greetings friend Jaime Alonso

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Jaime Alonso Olivo
hace 6 años
hace 6 años
SOLUTION. The solution to the problem mentioned above is to change the integrated circuit U211, that is, the LM339N, which in this case was the right channel, and the same would be done with the Left channel.
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