Insight into the inside of the hearing aid

I think that those two contact points will remain there, but they will be hidden in the case and will be connected to the coil used for inductive charging. I don’t think that part with the contact points is changing, although from our perspective it seems like it isn’t there.

HMm; I was thinking the opposite. That is, it would need to be a “clean-sheet” new design like the Signia Pure Charge&Go AX. Though, I could be wrong about how to get a magnetic coil in there, I am no hardware engineer.

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I’m also not an engineer either, just guessing. It is logical that the manufacturer does not want to change the design a lot because it requires a lot of time to modify, so the manufacturer wants to make the change as simple as possible. Apart from that change with the inductive coil, Luminity remained the same as paradise. I think that the most changes were made in the software. There is also the possibility that they made a better PRISM chip, but limited its capabilities, ie blocked the capabilities, and later in the newer version of the hearing aid, they only unlocked those capabilities and introduced Autosense 5.0. The manufacturer does not want to make a new chip every time, it is cheaper for him to make a chip in a huge quantity. I saw that phonak, for example, doesn’t have separate chips for versions 30, 50, 70, 90, it’s all the same chip that is blocked somewhere so that you can’t use those possibilities if you have a lower technological level.

I have successfully made some spot-soldering attempts with the E-Caps.
2 x 2200uF / 35V in parallel charged with 30V. Thin-stranded wire to be welded to an old battery. I strongly recommend some tests to find the right balance: I needed several attempts varying capacity and voltage. The wire must be thin enough, otherwise, too much energy must be applied and a hole is burned in the battery case.
The devices shown above may be too powerful unless they are widely adjustable.

Important: the wires must not be connected to the HA. It would be destroyed by the high voltage applied when welding the 2nd connection.

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Very interesting.
How did you apply the electrodes? Same side?

Yes, same side. Otherwise the battery would be damaged by the high voltage. And the current would be reduced.

As shown in the picture: black wire attached with black tape. Then I touched with the red wire the same side of the battery, short spark, done.
Surprisingly the area were the black wire made contact does not show any burn-marks.

Try laying a wire on the battery them put 1 electrode on the battery case and the other electrode onto the bare surface of the wire you are wanting to attach so the spark happens to the wire rather than the battery case, i.e… the wire you are connecting wants to be already grounded to the casing of the battery.
that would be my next step, that way no voltage or current will flow to the hearing aid and the current flows across the wire you are wanting to attach rather than along that cable.
You could also charge the caps to a lower voltage

In the PCB, is there any external flash chip on it?
could you help to take a picture closer for both sides of PCB?
I was wondering what is the flash chip for hearing aid…

How did you get the top part of the housing off? I do not want to break it.
I took off the bottom part and have already removed the pin from the receiver.

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That’s how I did it:
Levered with a thin metal tab at the front.
When levering between the front housing and the circuit board, it made a soft cracking noise. But nothing seems to be broken.

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@Baltazard
Très interessant! Merci beaucoup.

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@sterei You are very welcome, de rien. :+1:t3:

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Wow how you find that video? Thank you.

I been searching for hearing aids how to take it apart but only found 1 so far. Its Rexton brand unknown model hearing aids but procedure is largely the same thing.

Put pin out, open and pull up the cover, pick it piece by piece, clean, reverse the procedure. Done.

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@mami2529 You are very welcome.
I was searching for REM equipment on youtube, then I came across that video, so I’ve posted it on this forum.

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@Baltazard
Interesting, I didn’t know there were French speaking hearing aids!
If you buy a REM kit can we all come please?

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@michael1 I use subtitle and translator within youtube if I want to watch videos with different languages, sometimes, videos on youtube come with few audio languages to choose from on top of the translated subtitle; But for this instance I was curious.

Few years ago, I did get in touch with Aurical and they’ve quoted me around £5000 for the equipment with 2 years warranty, then I will have to pay around £2500 for the calibration if needed, not sure about the program to make the whole thing work, if it is included in the initial price or is a recurring sub!

The REM isn’t for me, but for my brother who doesn’t have access to REM where he is.

Hearing loss is universal, I am sure you know that, and I wonder how far this forum is read around the globe, I mean, it could be someone in the middle of the Serengeti down in the south or in the Inuit land up north, or in the middle of the Shibuya crossing to the east or or somewhere on top of of the Andes mountains to the west!!!

It’s funny, One planet, One problem and One species*…
*I suppose hearing loss isn’t just specific to human, but can be found in all livings!!!

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I think the two members on here paid £2500 from Ebay for used equipment.
Your brother is a lucky man to have you.
If you remember I bought the P30 UP from you that you got for him. Just run out of warranty but managed to get them replaced from Boots in December!
Good to talk.

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@michael1 Sorry man, I completely forgot, got few things going on at the moment :cold_face:
Lucky you got them replaced, well done, did they charge you for it?

£2500 used! not sure I will venture into that, since they need to be calibrated.
I found a different make, but still, charge around £4800 new, and from memory the program isn’t included in the price (they are Italian).

My thinking, is getting a new one with warranty and support, send it to him, where he can get a charity or an audiologist who can use the REM to tweak his HA, or he might learn how to use it.

Again, sorry, I completely forgot about the P30; Absolutely brilliant you got them replaced by boots.
Boots will definitively be on my Books, sum tin wong wiz dis santance :rofl:

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Yes no quibbles about the warranty.
If you are considering Boots then look into the appointment availability. In February i was told May for an adjustment. Doncaster is very busy.

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