Hey guys, so this might not be directly related to Arduino, but I figured this was the best place to ask it. I have a usb powered midi controller called the Native Instruments Maschine. Recently, it collided with the ground USB port first at a rather unpleasant velocity. The USB b pcb mount tore off the board. The +5v, Grnd, Data + and Data - feet all snapped near the physical port, essentially leaving four metal prongs still soldered to the board. I soldered wires to each of those prongs and brought them off the board to a USB connector I stole off an old modem. When I plugged it in, it lit a portion of the leds but the lcd screens did not turn on and my computer did not recognize the device. Thinking I messed up the salvaged USB connector I cut open a USB cable and basically soldered it directly to the board's USB connectors . Now no lights come on
. On closer inspection I discovered that a component called L1 was broken off by a metal foot of the usb pcb mount. The +5v and Grnd immediately lead to the missing L1 component from the USB pcb connection. From what I can tell, I'm guessing this is an inductor meant to smooth the power supply voltage out? What value the inductor was is a mystery to me and I don't think anyone at Native Instruments is going to tell me.
So, my questions are as follows
1. Theoretically should it work if I solder wires from the old USB connector's prongs stuck in the board to a new USB connector and then plug a USB cable into that?
2. If some lights came on before and now none do, it seems like I screwed things up even more. Is it possible capacitors/inductors held enough energy to power some of the leds for a short time even though no power is being supplied? That might explain why it seemed to work before.
3. I found a forum post over on spark fun about someone who fried the L1 inductor on their usb RFID chip, and it seems like a similar situation. Those who replied to the post seemed to say that because the inductor was functioning as a low pass filter for the voltage that it didn't really matter the exact value of the inductor he replaced it with. That board's inductor was a 33nH inductor. So, could I just use a 33nH inductor on my board because they are both usb powered devices?
Sorry to write such a long post, I'm still new to all of this and I have a lot of questions! Any help would be GREATLY
appreciated as a new Maschine is a hefty 500 dollars
Here is a photo of the missing L1 component and of my poor soldering job on the USB pins