Bottom module needed

[Julia4]

Hello dear Fairphone friends
I need a new bottom module for my Fairphone 2. Shipping would be to Germany.

Kind regards Julia

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NB: If you are interested and want to send a direct message, please check #how-to-dm.
Be aware, that cross-border shipment of batteries outside a phone is virtually impossible for individuals.

[anon9989719]

Hi Julia and welcome to the community forum. There are many such requests lately and you may want to consider a repair ~ you don’t say want the problem is ~ the usb port, microphone ??

FP2 Bottom Module: Repair broken µUSB port and or mic

@JohnHughes (thanks again) send me two broken bottom Modules some days ago. This one has a defekt µUSB port. After disassembling I took a picture with a microscope camera and found some solder cracks. Barely to see without magnification. Two cracks at the shield contacts that I am not too worry about, but also one at contact 5. I am sure that was a slack joint. Some serious force must be acted to the Port. I will try to resolder the joints and hope the bottom module will be able to do its work…

[Julia4]

Thanks for your reply. The microphone is broken. I already unscrewed the Phone all the way and saw that the microphone is loose under all the protecting parts. Does this make sense? I cant describe any better since my english is very limited in technical topics.

[anon9989719]

Yes that makes sense, your English is fine

If you read this post you may be able to contact the author for help in repairing the mic. There are details elsewhere on the connecting strips that need checking and the flexibility of the board that allows the mic to seperate.

New Fairphone 2 Bottom Module with an appropriate case

No, for now I will have to take the speaker and the vib. from a dead module and reuse them. The microphone will be a new one. But I added a filter for the differential pair and I also added a reset fuse. Maybe Fairphone will cooparete this time, if I can show a working prototype. This shouldn’t be too hard, because I can handsolder everything and the PCB is cheap to produce, because it’s only a 2 layer PCB.

[Alex.A]

@Julia4

I already unscrewed the Phone all the way and saw that the microphone is loose under all the protecting parts.

Up to where exactly did you unscrew the phone, and what is loose? The bottom module? The microphone inside the module?

@Julia4

I cant describe any better since my english is very limited in technical topics.

If you need, you can also describe your problem in German. There are several German-speaking people on the forum.
Wenn du es brauchst, kannst du dein Problem auch auf Deutsch beschreiben. Auf dem Forum sind viele deutschsprachigen Menschen.

[Julia4]

I’ll try it in both languages.

The microphone itself is loose. As I unscrewed it the microphone fell out.

Das Mikrofon ist locker. Wenn ich es bis direkt zum Mikrofon aufschraube, fällt es raus.

[anon9989719]

Maybe you post can an image of the problem.

[Julia4]

[anon9989719]

Thanks for the image, maybe someone who has repaired/replaced one can help.

FP2 Bottom Module: Repair broken µUSB port and or mic

Hey, just desoldered my microphone from the bottom module. the (very thin) pcb is glued into the plastic case of the module. But with a heatgun the glue softened and you can pull it out. After that I put my heatgun on 380°C and desoldered the mic. I coverd the surrounding parts with kapton tape. But I ripped one half of one solderpad off the pcd(see picture, top right pad). The trace from that pad seemed to be connected to a via next to it. [image] That was written on my mic: S1263 277…

[ElKrasso]

This circuit board is unrepairable defect, as the four solder joints where the mircophone is connected with are gone.
Therefore some force is needed, maybe caused by the disassembling of the module.

[anon9989719]

RE @ElKrasso

Though I am not dismissing that it is unrepairable by you or anyone you know from what I have read the module has to be broken down to get to the back of the area where the mic is fitted. Once that has been achieved it may be possible to effect a repair. However the skills required are beyond most people’s desire to learn.

Thanks for the image it is very detailed

[ElKrasso]

you can clearly see that there is no copper left in the round spots, where it should be. This is not repairable.

[anon9989719]

I was comparing to this image, which shows no copper. I thought I read that the plastic can be removed and there are contacts underneath ??

This image is an extraction of the one on the following post and looks almost identical even to the metal contscts viewed through the holes

FP2 Bottom Module: Repair broken µUSB port and or mic

Hey, just desoldered my microphone from the bottom module. the (very thin) pcb is glued into the plastic case of the module. But with a heatgun the glue softened and you can pull it out. After that I put my heatgun on 380°C and desoldered the mic. I coverd the surrounding parts with kapton tape. But I ripped one half of one solderpad off the pcd(see picture, top right pad). The trace from that pad seemed to be connected to a via next to it. [image] That was written on my mic: S1263 277…

[ElKrasso]

No, I took this picture The red marking shows the wireing on the printed circuit board. The yellow mark is where a solder joint is missing. Also this PCB is broken. The copper is covered with solder tin why it looks silver.

And as this technology of PCB is called SMT (surface mount technology) there is no related wireing underneath. Probably this is a multi layer PCB, which means that there is also wireing between the top and the bottom side of the PCB.

[anon9989719]

OH dear! ~ and again for 20 characters