XP deus coil damaged by salt water

[ivconic]

@ivconic the firmware is encrypted when downloaded from XP, there are separate firmware files for the coils, headsets, remote control. There might be a chance that the fimware is transmitted to the coil unencrypted. However I'm most interested to know what ADC is used, given the ADA4841 Pre-amp and the"C4E" marking (not sure about the last letter) on the Chip I guess it could be the AD7691 http://www.analog.com/media/en/techn...ets/AD7691.pdf, but it's a differential ADC which is strange?
Last thing, the NRF24L01 can be used in promiscuous mode, sort of, see here http://yveaux.blogspot.ch/2014/07/nr...er-part-1.html

AD7691 is having 10 pins.
According to posted photos it is very hard to tell how many pins exactly that small ic is having; 10 or 12?
I looked at posted photos pretty carefully and can't tell for sure about number of pins.
Would be really good to be sure about exact ADC model used there.

[sled]

I think it has 10 pins, you can see it on Skippy's pictures (see attachment). Still not sure about the exact ADC, however I'm pretty sure it must be one from Analog Devices, often the Pre-Amp and ADC are from the same manufacturer.

[ivconic]

I think it has 10 pins, you can see it on Skippy's pictures (see attachment). Still not sure about the exact ADC, however I'm pretty sure it must be one from Analog Devices, often the Pre-Amp and ADC are from the same manufacturer.

[ATTACH]38408[/ATTACH]
[ATTACH]38409[/ATTACH]

I missed to see those photos?
Yes it is having 10 pins.
Thanks!

[Lavabo]

Sorry was a bit busy this week

Here are the Closeup chips:

PIC24FJ64
I think my problem could be the chip left to the PIC24, one connector seems broken...ill check for the part no...
there is also a damaged connector on the PIC24



ADA 4841-2YRZ
8064-1235



NRF 24L01 1307EN


01T 1416 292L

[sled]

Thanks a lot for the pictures, it almost looks like they tried to scrub off the part number of the chip to the left of the PIC. can you confirm it says C4E? It's the analog to digital converter.

[ivconic]

Good photos!
Good job!
Thanks!

[greylourie]

These pics are hosted offsite.... Someone should make copies and save (Rev 3.1 pcb), or directly attach in a post on this thread.
Orientation of the chip to left of the PIC.. - is different to the example posted by Henrik in his coil rebuild thread. In Henrikras example, the pins of mystery chip are aligned pointing to/and away from the PIC. (Rev 2.0 pcb)

[ivconic]

These pics are hosted offsite.... Someone should make copies and save (Rev 3.1 pcb), or directly attach in a post on this thread.
Orientation of the chip to left of the PIC.. - is different to the example posted by Henrik in his coil rebuild thread. In Henrikras example, the pins of mystery chip are aligned pointing to/and away from the PIC. (Rev 2.0 pcb)

Good observation!
Yes there are small differences.
I was about to say something the other day, but i decided to shut up than.
As part time servicer i am having many XP products on service lately.
So i noticed a bit different quality of made between "older" and "newer" coils, for example.
Not saying "better" nor "worse"... but different. Time will tell are those "better" or "worse".
I only noticed one strange thing; newer coils (like this one presented here) are somewhat problematic to pair with older remotes and especially older headphone sets.
Recently i had lot of troubles to pair newest 28cm coil with headphones from first series.
I managed somehow, you may say randomly, after dozen attempts.
At the very same moment i had 3 Deus competes at home, so i was able to make comparisons and checks all the time.
Why is that? What happened? I can't tell.
Only thing different was the fact that it is brand new 28cm coil from latest series.

[Lavabo]

Hello all
i will upload the picture to the forum eventually.
The chips near the PIC , im unable to read it, even with my magnifier tools.I cant read if its CE4 .... I will try again with a computer magnyfing tool we have in a lab. Maybe it will be easier to decrypt the part number.

I did an oven reflow of the board (with a printer board at the same time) but its not working (the printer is now working). I saw on the board some connector lost their soldering ... i see the copper
I have a friend working in some fine electronic businness (aeronautics), i may ask him if he can clean the pcb with ultrasound then solder the lost connectors...

I also contacted XP Deus France (America i dont have an email, just a phone number, im mostly speaking french so i prefer an email) ,
it seems i have to send the complete disk, and they will make a complete diagnostic ... i guess i should keep it and buy another one, used or new.
My Canadian Distributor answered hes not selling such part, the pcb ...
EDIT- i just received the email address for the America XP (from my canadian reseller) and im asking about the PCB

I also wonder if i should check the battery compartement if there were salt water damage too ... waiting befor opening the compartemnt if i could have another one under warranty...

Well thats where i am now on!!

no disk for the summer 2017 coming !! he he

[Lavabo]

Buying a new coil to replace the 11" --

--Should i wait for the newer style high freq coils ?
-- or im better with a 13x11 DD ??

[Sean_Goddard]

Try the reflow again but DROWN the board in flux first.

It also looks like you have conductive salt contamination on that PCB. You NEED to clean that off before you even have a chance. I suggest a 100W ultrasonic cleaner, de-ionised water @ 50 degrees C and 15 minutes at full power, then rinse and dry give it a try. THEN try the reflow.

Your problem just highlights why I don't like the Deus. When I say that, I think it's a fantastic machine, but it is NOT intended to the environment I would subject it to (heavy beach use) and the format seems too expensive to repair, nice idea but....So I don't like it.

Sorry, ETrac with a large SEF coil ALL the way on this one (beach use) or a good PI (Hammerhead or Chance).

[Lavabo]

Thank you
Bought another coil 11" (refurbished from xp america)

for the remaining PCB, i will do as you suggested. Ive located an ultrasonic cleaner in a school lab, hope its heating or ill buy one - hey i could then clean my penny i found with this cleaner

At least they could coat their electronic part with CorrosionX or something similar!!

[sled]

I found some new good quality pictures of the Deus' coil PCB, comparing with other pictures I have, it's clear that the 10-pin DFN package next to the preamp has "C4E" written on it.

The ADC is: AD7691, 18-Bit, 1.5 LSB INL, 250 kSPS PulSAR Differential ADC (Datasheet)

The 250kHz also matches Deus' operating frequency, i.e the HF coil at 50kHz would allow for four samples per period (= 200kHz).
Wondering why they use a differential ADC and how they make that work....

[Orbit]

Sajze grose !

[kt315]

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