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I think the diode was used to signal PWM and after its blown the whole unit shutdown. Can anyone please confirm these 4 encircled components?
Now just the resistors need trial and error.
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Here are the photos of the controller board. I can see two resistors and a zener diode as burnt: Please help me figure it out.
In the mean time, there is a hi-res picture of exact power supply happened to be posted on a Turkish forum! I can see a red red blk 22ohms and the other is 4 7 something. The FET I believe has been mentioned already. As it was mentioned, your best bet is to find someone who has the same unit. Does it look burnt?
Thanks a lot guys. I need to know if someone could post the picture here that card so I can identify it and then search to try to find itbecause without knowing their identification can not.
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I guess it means it can withstand high voltage but not sure.
Most ICs on the amplifier board have large heat sinks on them so its not easy to point. Umair Hussain New Member May 28, Not sure but I think the picture was originally posted here; http: I think the lightning damaged components on the amplifier too umar: I guess the adapter is unable to supply enough current.
Solder Guy New Member Sep 20, Any news about the missing component of the identification of the main board?
You must log in or register to reply here. I checked with a new one and the diode readings are same.
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Basically I wanted to learn about SMPS circuits after it blew up and it has helped a lot in that regard. I think I can put some combination of inductor and capacitor to filter it and then the speaker will work even better with it. Can’t spot any datasheet for that IC in a quick search. It was able to supply the current but lot of static noise was there.
I took the liberty to indicate the missing component of the position. It will switch off when the computer goes to sleep.
Solder Guy New Member Sep 15, This component has 9 contacts on the board.