u/Meaninglessness_

I just emailed Lifsa about Marplan and they said it’s available. I’m on Nardll and I was just curious about the whole situation. Has anyone had any luck in accessing Marplan? It could just be them bullshitting us.

Hey all, first time doing a real connector swap and I could use a sanity check. I've got an old FiiO X3 II and the micro USB port was dying, so I'm putting in a USB-C replacement (MC002 and FMC002). The problem is I don't know which version to use, because half the pads read as ground.

Got the old micro USB off with hot air and cleaned the pads up, that part went fine. Where I'm stuck is the orientation. I really don't want to fry the board by getting VBUS and GND backwards.

I've been trying to ID the pads with a multimeter, but the footprint has a bunch of ground pads on it (looks like the old connector had shield/ground fingers on the sides). So when I probe to ground, half the pads read as ground and I can't tell the actual GND signal pad apart from the shield fingers. The signal pads are also tiny and my probe tips are wider than them, so even getting a clean reading is a fight. I know the micro USB pinout is standard (VBUS, D-, D+, ID, GND), I just can't tell which physical end of the board is which. I can't find a pinou

A few questions for anyone who's done this:

• Does anyone know the pad orientation on micro usbs of this kind? That would save me a ton of guessing and potentially frying the board.
• Any reliable trick to ID VBUS and GND on a footprint with multiple grounds like this?
• Since it's a standard micro USB device, is it safe to just use the standard (MC002) version in the only orientation it physically fits? Or have you seen boards mounted mirrored where that bites you?
• Best way to verify polarity before applying power so I don't kill it?
• For the 5 signal pins, do you hand solder those or reflow with paste and hot air? I was gonna use a tooth pick and put some wet paste on each contact then use some hot air (gonna do pads on the bottom before).

I've got a basic multimeter and a hot air station. Pic attached (I have more but it won't upload for some reason). Any help appreciated, kinda nervous about the orientation step. Thanks!

Hey all, first time doing a real connector swap and I could use a sanity check. I've got an old FiiO X3 II and the micro USB port was dying, so I'm putting in a USB-C replacement (MC002 and FMC002). The problem is I don't know which version to use, because half the pads read as ground.

Got the old micro USB off with hot air and cleaned the pads up, that part went fine. Where I'm stuck is the orientation. I really don't want to fry the board by getting VBUS and GND backwards.

I've been trying to ID the pads with a multimeter, but the footprint has a bunch of ground pads on it (looks like the old connector had shield/ground fingers on the sides). So when I probe to ground, half the pads read as ground and I can't tell the actual GND signal pad apart from the shield fingers. The signal pads are also tiny and my probe tips are wider than them, so even getting a clean reading is a fight. I know the micro USB pinout is standard (VBUS, D-, D+, ID, GND), I just can't tell which physical end of the board is which.

A few questions for anyone who's done this:

• Does anyone know the pad orientation on the FiiO X3 II specifically? That would save me a ton of guessing.
• Any reliable trick to ID VBUS and GND on a footprint with multiple grounds like this?
• Since it's a standard micro USB device, is it safe to just use the standard (MC002) version in the only orientation it physically fits? Or have you seen boards mounted mirrored where that bites you?
• Best way to verify polarity before applying power so I don't kill it?
• For the 5 signal pins, do you hand solder those or reflow with paste and hot air?

I've got a basic multimeter and a hot air station. Pics attached. Any help appreciated, kinda nervous about the orientation step. Thanks!