Creative GigaWorks T40 Burnt Capacitor C36: Seeking Diagram/Photo to Identify Parameters

Hello.
In my set, one channel suddenly stopped playing (loudspeaker without an amplifier), while the other one started to make strange noise and interruptions.
After opening the casing, it turned out that there is a sooty point on the preamplifier board, a trace of a small explosion. cleaned this place thoroughly with acetone. it turned out that one of the capacitors marked (C3 ??) has burnt, the second number is probably 6, so the number of this capacitor is 36.

He is looking for a diagram or a photo of the board from these speakers to determine the parameters of this element and to recreate the part of the track that has been damaged as well. It looks like this element was connected in parallel and with the second capacitor, only electrolytic.

Could the failure of one capacitor cause disturbances on two channels, because if not, then I have to look for further damage?

I'm afraid something more has been broken. Show the photo of the plate from the side of this electrolyte. Measure the voltage on it. Without a diagram, however, it will be difficult to determine something.

On the other hand, you can't see anything. I wonder where these elements are connected to the rest of the system. in the photo I marked the electrolyte connected in parallel with this smd.





The electrolytes were stuck with black mass making it impossible to see the paths on the other side. I have included a more detailed photo of the underside

after a careful inspection of this place, I came to the conclusion that the paths go to the other side here.

Is it possible to approximate the capacity of this capacitor ????

I desoldered this electrolyte and partially cleaned the plate of this black mass. It turned out that the problem was more serious. The tunnel connecting both sides of the tile is completely burnt .. the tile itself has also suffered. the path leading to the damaged item is also broken.

Repairing such damage is probably beyond my capabilities. Is it possible to repair it at all economically justified costs ?? Anyone want to repair?

I am adding photos showing the damage

Without a pattern it will be tough. This path can be repaired, but it is not known if something else is damaged. You need to start with checking the power supply.

I think that the equipment is repairable, but it is not known if it can be done at a reasonable price. This is a mass production and there are no diagrams for it. The service is probably in Krakow or somewhere in the south of Poland (look on the Creativa website) but prices can be high. Perhaps the service is replacing the entire plate. If you want to do something yourself, check out the application of the chip used here in the power amplifier. You can see that this is a class D power amplifier and it may be damaged.

Marek

I found the service, the return shipment itself will cost me PLN 60. The entire amplifier module will probably be replaced. which is probably PLN 200 together and I will get the same highly unreliable electronics.

Wouldn't it be possible to build something similar based on existing components for this price? The power supply is operational, and so is the rectifier module. The supplied voltage is approximately 19V. power supply 55w. I like these loudspeakers because they are compact and yet they even do well (considering their size) so I would like to save them somehow with the help of an amplifier, e.g. 2x15w. just if he doesn't play louder than the music

However, I believe that you should make this effort and contact the service and ask for a specific price. If the cost is PLN 260, it probably still pays off.
If you want to replace it with something else, buy some modules on the Allegro and replace it. Probably no serious service will do it, because it will soon turn out that you need to match the amplifier to the cabinet, make a tone control, two inputs, think about boosting the bass (as it was in the original) and then 260 PLN is absolutely not enough. However, if you do it yourself, you will certainly fit in this price - you just need to be able to do it.

In my opinion, it needs to be repaired or thrown away (if you think it is extremely low-quality electronics).

Marek

Fitting something will probably be difficult due to the fact that the class D amplifier is small and has very low losses. Throwing something in the AB class will significantly reduce the efficiency of the amplifier and will require an appropriate heat sink. Look for ready-made amplification modules based on a class D amplifier.

Exactly - I forgot about the small amount of space and high efficiency of D-class tips. And although the replacement of this tip seems quite simple, when you think about all the limitations, it ceases to be so simple. In my opinion, you need to find someone who will fix it (the tip must be damned, so it should be replaced) or discard the equipment. Everyone would like well and for half the price, but this is not always possible.

Marek

Hello.
In my case, the tunnel connecting both sides of the plate was also burnt (quite a common case in this model). It is enough to connect it as in the attached photos. After this operation, the speakers sound as before. The only difference is that this smd capacitor has not been damaged.

.bad. wrote:

Hello.
In my case, the tunnel connecting both sides of the plate was also burnt (quite a common case in this model). It is enough to connect it as in the attached photos. After this operation, the speakers sound as before. The only difference is that this smd capacitor has not been damaged.

Maybe this is a layman question .. but did you leave the capacitor in its place?

Yes. There was no reason to desolder it.

.bad. wrote:

Yes. There was no reason to desolder it.

I decided so before you answered and I made according to the attached photo. They come alive and play, thanks!

hello in my speakers this path has also been interrupted
I attach a picture

I have a question about these two SMD capacitors 1 and 2 (photo below) what are their values and for what current?

.bad. wrote:

tunnel connecting both sides of the board

Grommet ... Let's call a spade a spade.

Hello colleagues. It was the same for me. The grommet has burnt under the C29 electrolyte. This could only be ascertained after desoldering the capacitor and cleaning it from the nasty black glue. I drilled a hole with a 0.5mm drill in the place of the grommet and soldered the wire for the through-hole. The speakers came to life. I bought them aledrogly for a hundred so that my joy is immense.
Thanks to everyone for helpful posts and photos.
Regards

I am definitely a layman
but after 3 years of looking for among friends who supposedly know each other, I found this post on elektroda.pl
I liked these speakers a lot. I reacted olewly to texts such as exchange, buy new ones for PLN 200, etc.
I mean, of course you are right etc. I am very attached to them and as active monitors for listening with 1m on the computer I did not see an alternative. Right, it paid off to wait. I don't know much about electronics but I love broadly understood audio. Of course, there are two other devices for auditions and this is their purpose. These are great sounding monitors without a sub and it should be like that.
I knew this post that confirmed my symptoms, the description without measurements confirmed the significance of what happened. Now they are playing like new and I feel like a child. Thank you all very much.
Below is a report.
Greetings
Wojciech

.bad. wrote:

Hello.
In my case, the tunnel connecting both sides of the plate was also burnt (quite a common case in this model). It is enough to connect it as in the attached photos. After this operation, the speakers sound as before. The only difference is that this smd capacitor has not been damaged.

I did too. There was no damage on the PCB, a piece of the cable and the magnifier are playing

The latest topic is connected.
Unfortunately, I came across a play where some home-grown poker was groping with his dirty fingers.
The effect was that there were a lot of bad elements and a few missing. Unfortunately, the donor art has already donated the system once, so he could not 2x, so you have to find one. It's about the U2 chip, tiny on the power board.
The markings on the housing are "mybr s14b". Unfortunately, I found nothing. Anyone know what this deal is?