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Audio equipment

Amplified horn without audio

CreatividadD
hace 6 años
hace 6 años
Hi, how are you? I share my problems, I have an amplified horn of 15`. It started to give me a problem with the potentiometers, they scraped, and those things, it lasted like that for a long time, until one day I would not be able to listen and until I insisted moving the volume controls and then it worked, from that day I decided to change the potentiometers had one of A50k and another of A5k. In no store did I get that same only with the nomenclature B, so I changed them. At the time of testing the horn you hear too much but too low and if I add volume does not respond, they told me that it could be part of the amplification. Could you help me by telling me how to check that part of the horn, what cirtuos should have with certain values etc. etc. etc I have very little experience in repairing devices of this type, the little that is electric so I would thank you infinitely for your help. pd I have another stereo from home k and the speakers are not heard either I imagine if I manage to solve the amplified, that urges me, I feel that the stereo will solve it easily
pr122
pr122
10.397
hace 6 años
hace 6 años
If the ampli worked with good volume before changing the potentiometers and after doing it no longer, the problem can be attributable to the work of changing them, some badly welded track, do not forget that the new equipment has double and triple face printed , the welds not only go down but also above the plate and sometimes internal that can not be seen this makes many technicians, prefer to cut the pins of the components and weld outside, before risking to completely desolder, although the potentiometers that you replaced are the resistance values, they are not equal in terms of the variation being the originals of logarithmic variation and those that you put of linear variation, this makes the potentiometer have to be in another position different from the original to correct, but I believe which is a welding problem, check this out, regards
CreatividadD
hace 6 años

Thanks for your help, on the last day I used it, it did not give me sound just as much as I moved the potentiometers, of course not with the same intensity, attached photos of the plate and the potentiometers, in case of not seeing them please tell me where could I send them to you

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CreatividadD
hace 6 años

friend detect a desoldered capcitor of a pin, which I soldered again and the horn is already heard hehe, thanks for your help.

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