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Audio equipment

Help with JVC equipment does not turn on

alfrealfre
hace 5 años
hace 5 años
The device does not turn on, the clock appears but when any key is pressed, the screen and turns off. It seems that some module or stage is missing because they tell me that another person He was checking the equipment because some CDs got stuck, I don't know what happened, it seems that there was a misunderstanding and they returned the equipment. Seeing that he didn't turn them on again ... The fact is that they gave it to me for repair or repair. I would like to get it back because it seems like a good team apparently It has a lot of functions, radio, USB, Cassette, CDs, DVDs, it is robust. I already checked the source, capacitors, diodes, transistors, tracks, welds, but apparently everything is in perfect condition "impeccable" and the team Aesthetically, it looks very well taken care of. If someone can give me any input or hint of the breakdown I would appreciate it. Reference and motherboard information is in the following images: Thanks for some good input. Greetings. I even made a video on youtube about this problem: https://www.youtube.com/watch?v=MISMj00okVs
jomi
jomi
38.143
hace 5 años
hace 5 años
Measure voltages at the source and verify that the yellow voltages are present Go source diagram JVC CA-DXJ11 Source Diagram
alfrealfre
hace 5 años

Ok, the IC630 does not measure at the output and the IC640 also does not mark voltage at the output.
I guess you have to change those integrated, I have almost no experience in repair, again thanks for the input. Greetings.

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alfrealfre
hace 5 años

Ok, the IC630 does not measure at the output and the IC640 also does not mark voltage at the output. I guess you have to change those integrated, I have almost no experience in repair, again thanks for the input. Greetings.

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jomi
jomi
38.143
hace 5 años

The IC630 and IC 640 receive voltage through pin 1 and deliver voltage regulated by pin 2, as long as they receive a control voltage through pin 4

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alfrealfre
hace 5 años

Neither the control pin nor the output pin did not mark me voltage in those integrated, can the problem be with the control part?
https://www.youtube.com/watch?v=GPoN-wFOzu4

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Cuasitecnico
hace 5 años
hace 5 años
change the capacitors of the source, those that go to the output of the chopper, that is, in the secondary, those sources usually have that problem.
julian andres suarez
hace 5 años
hace 5 años
Good night, I also have that same team and the same thing happens to me, I don't feel like I do the same
julian andres suarez
hace 5 años

I also have the same team, it's very good, the same thing happened to me, it doesn't turn me on anything that can be for me.

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alfrealfre
hace 5 años

Hello, what they told me above did not work, so I think it is a problem of the micro and so far I have not been able to solve it either, what a shame because this equipment is equipped with a good source, greetings

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