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Behringer Euroleague B115 Box .... Distorted sound and low volume

Andycedillo23
hace 6 años
hace 6 años
IMG_20170911_225034.jpg [3.67MB] IMG_20170911_230937.jpg [3.54MB] IMG_20170911_232035.jpg[3.78mb] IMG_20170911_233836.jpg [3,98mb] ach / attach_25.png [/img] IMG_20170912_001021.jpg [3.64MB] IMG_20170912_010551.jpg [3.61MB] ​​ 15049310769531414470592.jpg [3.03MB] ​​ 15049307925451379914636.jpg [3.78MB] [url=/view-attachment/aHR0cDovL2Nkbi55b3JlcGFyby5jb20vdXBsb2Fkcy9kZWZhdWx0LzAwMDEvMT [/url] kvSU1HXzIwMTcwOTA2XzIyMjgxNy05Nzc1Ny5qcGc =] IMG_20170906_222817.jpg [2.94MB] [/url] IMG_20170906_222825.jpg [3.65MB] IMG_20170906_222811.jpg[3.76mb]IMG_20170906_220935.jpg[3.51mb] Hello colleagues I received this amplified box, with the problem that it was heard low volume and also charreaba to raise it but was still listening low volume when uploading. Completely disarm and found that works with switched source, visually checking I found a burning between a coil of 22uH and smd resistance with numbering 100 .... The medi and was correct. I found the burning and the clue that went from the resistance to the coil was open by burning .... Then weld a wire in the open track to join that resistance and coil .... Arm the box and it works normal. ... It has good volume and sounds clear ....... But I have rare enough to warm enough the whole plate ..... The filters as they see in the photo heat a lot I do not know if it will be normal ..... Or will I have to change some component near the flash ... I hope to help my friends ........ Greetings and thanks for the help
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JLMRNEO
JLMRNEO
JLMRNEO
1.750
hace 6 años
hace 6 años
Regards ! you will have to get most of the filters to check them, even if they do not look bad, you will most likely have to change them, so do as you describe ... once you take them off the plate you will notice. volume and heats a lot this last one is because it does not have enough amperage to maintain stable the whole system, due to the low value of the filters.
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JLMRNEO
JLMRNEO
JLMRNEO
1.750
hace 6 años

even the chikitos that are the ones that fail the most

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JLMRNEO
JLMRNEO
JLMRNEO
1.750
hace 6 años

many filters are heated because they are low in capacity and cost them keeping the current clean to where the energy consumption goes.

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Andycedillo23
hace 6 años

Hi JLMRNEO thanks for helping me ..... But one thing also happens that all the plate in general transistors, regulators, capacitors are heated enough. But for that burning that was on the plate between that coil and resistance will not have to see also another component my friend ??? Or already changing all those filters already improves that filtering of voltages and would be well thanks

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JLMRNEO
JLMRNEO
JLMRNEO
1.750
hace 6 años

remove them and measure them> they fail so without them you see them physically

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JLMRNEO
JLMRNEO
JLMRNEO
1.750
hace 6 años

many of those filters rise underneath without being visual

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JLMRNEO
JLMRNEO
JLMRNEO
1.750
hace 6 años

eh had many and many that arrive daily not from this brand if n many and is always filtering .... the demand is great as drinking water when it is hot. I do not know if I explain myself the hotter the inside the demand the more drain current should be filtered. and many do not look> just Czech, it's simple!

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Andycedillo23
hace 6 años

Many thanks JLMRNEO I will fully test the filters. A question the tolerance of a filter which would be ???? To know if measuring in microfarads I need to change the filter that is devalued ...... Also I need you to help me with the value of 3 potentiometers 1 is the master and the other 2 are low and treble ..... Usually what values ​​are those potentiometers and I think they are true logarithms ???? Thanks for the help ..... The photos of the potentiometers are in the publication

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JLMRNEO
JLMRNEO
JLMRNEO
1.750
hace 6 años

the controls are easy ... just clean with a suitable liquid almost never fail, almost always lubricate them ... with some suitable liquid, I use wd40. the value depends on what they are there are 50k or others

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Andycedillo23
hace 6 años

If my friend but what happens to the volume potentiometer when turning it make a scrape .... When leaving it stable the sound comes out clean but when raising or lowering the volume a charro is heard that is why the control is failing but only that ....

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Andycedillo23
hace 6 años

That as a companion I followed his advice and it turns out that all the training does not lower more than 10% of the nominal value of the capacitor ..... It is not normal to find a brief heating in all the components of the circuit or as it is with switched source no should it heat anything ??? ..

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Alexis Navarro
hace 6 años
hace 6 años
Cordial greetings friend Andycedillo23, in this type of equipment as the active booths are airtight and have little ventilation so if the temperature increases and one of the purposes of the switched sources is to avoid heating in the photographs you can see that this source power the amplifier part (high voltages) and low voltages of the pre, bluetoothh functions and display, you must analyze the line that was open, it is observed that this overdrive by a possible overload or over consumption in that line, for that reason the fault of low volume and if it squeaked it was depolarized the circuit that fed, if you reconnected this line and did not exist short or anything strange then it is verified that it was an overload either because of excess volume or in its defect they could have connected another passive cabin with different impedance causing the overload that is the most common that happens with these equipments, from there I suggest by pr ecaucion check the impedance of the speaker of the cabin is not altered, the switched sources are great work and exhaust very fast filtering changing its capacity, as mentioned by the partner JLMRNEO to change their capacity will make difference work so you can occur the reheating, you can check the higher voltage that are the most working and is not too continue to review what is associated with the line vent that there is no altered element and then also check the crossover that this booth brings to check that this among the normal parameters of this as the wattage and ohmiaje. regards
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Andycedillo23
hace 6 años

Hello Alexis Navarro thank you very much help. The conclusion you give me is very sure of the failure that could have this box, as the other colleague many thanks for your knowledge of me. But you could help with it because already joining the tracks and leave the correct circuit the Box works normally only that there is that heating in the majority of components and if changing the main filters and would stop overheating ????? And also if you can help me with the value of these potentiometer that desconosco its value ..... Thanks Alexis navarro

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Alexis Navarro
hace 6 años

Greetings Andy, it may be that by joining the track between the coil and the resistor you have re-polarized the circuit by feeding a missing voltage and from there that sounds good, you can try the filters of more voltages and take into account that they are of 105 °, the values ​​of the potentiometer I do not see them in the photo but with the multimeter you can measure them from end to end (the pins) and you will get the value of these or if they have a code that indicates it.

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Andycedillo23
hace 6 años

Many thanks Alexis for the rating helped me a lot and tomorrow I will do the check of the main filters, and if they are altered I will replace them. I hope that that excess heat will disappear ....

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Andycedillo23
hace 6 años

Hello Alexis Navarro did the steps you told me with the filters ..... And the capacimeter gives me values ​​of 10% lower than what is in the capacitor ..... Others 7% ..... But none is too low

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Alexis Navarro
hace 6 años

Hello friend Andy, it means then that the capacities of the filters is well, it is possible then that at the time the impedance of the cabin has been altered by the user himself by adding some other passive baffle, it often happens frequently, visually verifies that capacity in ohmiaje says the speaker and then midelo and has comparison of values. regards

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Andycedillo23
hace 6 años

How about Alexis good ..... I have already changed those 2 filters but the same happens, colleague still reheating a little ......

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Andycedillo23
hace 6 años
hace 6 años
How about Alexis thanks for continuing to help with this failure ....... If you check the speaker and it is with its correct impedance ....... But what else could be colleague ????? Or put it together and handed it to the client ...... Or could it be that a bigger problem could happen and what would it be ...... And if you saw the photos of the training measures ???? You saw that if they were correct ????
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Alexis Navarro
hace 6 años

Greetings friend Andy, in what I see measurements of the capacimeter are fairly approximate measurements and written values ​​the lowest are 330uF filters, these could be changed for safety and therefore t would recommend to test before delivering the client so that they are safe of the work you performed and not to warn the client of the recommendations by adding another possible passive cabin that meets the minimum requirements for proper operation. regards

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