Car Kit Wiring - To cut or not to cut...

Hi,

I have a Nokia 6310i and I believe a Cark-91, (marked MCC-1 on the
cradle back) car kit fitted to my BMW convertible. The cables from
the car kit disappear into the depths of the dash. With the phone in
the holder, the car icon appears on the phone screen, and when the
phone rings the radio mutes, sound comes thru the speakers, and all is
well. But when the roof is down it is almost impossible to have a
conversation on the move using the car kit microphone because of wind
noise, so I bought an Ericsson HB353 Bluetooth headset. The headset
works fine when the phone is out of the car kit, but when the phone is
in the cradle you can't make a Bluetooth connection – the phone
instructs you to ‘remove the wired accessory'.

With some experimenting I determined that the key contact on the
bottom of the phone is the MBUS pin (pin 6). With pin 6 masked off
with a piece of tape the phone will sit in the holder but doesn't
think it is in the car kit – so it's held securely (and possibly
charges? – although it doesn't say charging…), but will associate with
the Bluetooth headset, and I was initially happy. But like everything
in life, dissatisfaction starts to set in…

What I would really like is to choose when I use the Bluetooth headset
(roof down), and when it should act as a proper car kit, muting the
radio, coming thru the speakers and so on (roof up). So I reasoned as
follows –

If I buy a micro switch and open the car kit holder and insert the
switch in-line on the wire from pin 6 (MBUS) then with the switch
mounted thru a hole in the side of the phone holder I can switch
between MBUS closed (acting as a full car kit) and MBUS open
(Bluetooth headset). And now we finally get to my problem; when I
open the holder there isn't a one to one relationship between the
contacts for the bottom of the phone on the holder, and the wires in
the unit – there is a little PCB in there and 14 wires coming from a
little white connector.

I have searched high and low on the Internet but can't find any
documentation about these wires and the function of each one. Seeing
as I am not the glamorous lead in a Hollywood blockbuster, cutting one
of the wires at random is not likely to deliver the desired result.

The wires are arranged in the connector as follows looking from the
back of the holder running from left to right

Blank pin – no wire connected
Orange
Green
Brown
Light Blue
Yellow
Pink
Red
Light Brown
White
Black
Grey
Blue
Purple

One last thing – I live in the U.K, so if there are country specific
differences in the cark kit then I guess mine is an English one.

Any help you Nokia gurus could give me on this – a pointer to some
documentation or some tips would be very much appreciated.

My 6310i is at revision 4.80.

Thanks

Neil

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› See More: Car Kit Wiring - To cut or not to cut...

"Piggy" <[email protected]> wrote in message
news:[email protected]...
> Hi,
>
> I have a Nokia 6310i and I believe a Cark-91, (marked MCC-1 on the
> cradle back) car kit fitted to my BMW convertible. The cables from
> the car kit disappear into the depths of the dash. With the phone in
> the holder, the car icon appears on the phone screen, and when the
> phone rings the radio mutes, sound comes thru the speakers, and all is
> well. But when the roof is down it is almost impossible to have a
> conversation on the move using the car kit microphone because of wind
> noise, so I bought an Ericsson HB353 Bluetooth headset. The headset
> works fine when the phone is out of the car kit, but when the phone is
> in the cradle you can't make a Bluetooth connection - the phone
> instructs you to 'remove the wired accessory'.

[Rest of long post snipped]

You find there are enough sunny days in the UK to make it worthwhile
buying a convertible..??!! Not in the bit I live in there aren't..! My
bike sits in the garage for weeks on end moping because I don't ride it
;-)

Seriously I can understand the problem, but I don't think there's an easy
way around it. You could fit the HSU-1 handset but then of course the
handsfree bit would go out of the window (or wherever it goes in an open
top..!!)

BTW if you find a way of opening the phone holder without bits of wiring,
springs, screws and whatever disappearing to the four corners of the
universe never to be seen again, please let me know..! I'd like to fit a
switch to interrupt the charging supply, as I don't believe in continually
topping up a battery every time I put the phone in the cradle. At the
moment I am using a bit of sticky tape but as you say it's not a good
solution.

Ivor

"Ivor Jones" <[email protected]> wrote in message
news:[email protected]...
> BTW if you find a way of opening the phone holder without bits of wiring,
> springs, screws and whatever disappearing to the four corners of the
> universe never to be seen again, please let me know..! I'd like to fit a
> switch to interrupt the charging supply, as I don't believe in continually
> topping up a battery every time I put the phone in the cradle. At the
> moment I am using a bit of sticky tape but as you say it's not a good
> solution.

If you're using a lithium ion or lithium polymer battery, those top-ups are
exactly what your battery wants and needs. NiCd and NiMH are a different
matter, though.

Jim

Id say go with a lithium ion or lithium polymer battery top-up


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"Jim MacKenzie" <[email protected]> wrote in message
news:[email protected]...
>
> "Ivor Jones" <[email protected]> wrote in message
> news:[email protected]...
> > BTW if you find a way of opening the phone holder without bits of
wiring,
> > springs, screws and whatever disappearing to the four corners of the
> > universe never to be seen again, please let me know..! I'd like to fit
a
> > switch to interrupt the charging supply, as I don't believe in
continually
> > topping up a battery every time I put the phone in the cradle. At the
> > moment I am using a bit of sticky tape but as you say it's not a good
> > solution.
>
> If you're using a lithium ion or lithium polymer battery, those top-ups
are
> exactly what your battery wants and needs. NiCd and NiMH are a
different
> matter, though.

I disagree. I have several Li-Ion batteries, some of which are over 3
years old, and although they aren't as good as new ones they still hold a
charge. I have seen similar batteries die in less than a year when
continally topped up. I don't completely discharge them, I wait until I
get a "low battery" bleep from the phone.

In any case, I'd still like the choice.

Ivor

<<My bike sits in the garage for weeks on end moping because I don't
ride it
;-)>>

Now Ivor, I think you are too keen to find excuses not to ride that
machine, a little lashing rain never hurt anyone! :-)

The back of the Cark-91 holder comes off without a problem, it's held
on with six very small allen screws.

I have a switch from Maplin - Ultra minature SPST toggle - part no.
FH97F which will fit once a small hole is drilled in the body of the
holder. All I really need now is to know which wire to cut into...

Neil

"Piggy" <[email protected]> wrote in message
news:[email protected]...
> <<My bike sits in the garage for weeks on end moping because I don't
> ride it
> ;-)>>
>
> Now Ivor, I think you are too keen to find excuses not to ride that
> machine, a little lashing rain never hurt anyone! :-)

True, but it takes me 2 hours to clean the bike afterwards ;-)

> The back of the Cark-91 holder comes off without a problem, it's held
> on with six very small allen screws.
>
> I have a switch from Maplin - Ultra minature SPST toggle - part no.
> FH97F which will fit once a small hole is drilled in the body of the
> holder. All I really need now is to know which wire to cut into...

Thanks for the info on the switch, I'll have a look next time I'm passing
the local Maplin shop.

Ivor

"Ivor Jones" <[email protected]> wrote in message
news:[email protected]...
>
> I disagree. I have several Li-Ion batteries, some of which are over 3
> years old, and although they aren't as good as new ones they still hold a
> charge. I have seen similar batteries die in less than a year when
> continally topped up. I don't completely discharge them, I wait until I
> get a "low battery" bleep from the phone.

Just relating what the battery professionals say.

Jim

"Jim MacKenzie" <[email protected]> wrote in message
news:[email protected]...
>
> "Ivor Jones" <[email protected]> wrote in message
> news:[email protected]...
> >
> > I disagree. I have several Li-Ion batteries, some of which are over 3
> > years old, and although they aren't as good as new ones they still
hold a
> > charge. I have seen similar batteries die in less than a year when
> > continally topped up. I don't completely discharge them, I wait until
I
> > get a "low battery" bleep from the phone.
>
> Just relating what the battery professionals say.
>

Well they would say that, wouldn't they, after all they want us to buy new
batteries..!

Ivor

"Ivor Jones" <[email protected]> wrote in message
news:[email protected]...
> > Just relating what the battery professionals say.
> >
>
> Well they would say that, wouldn't they, after all they want us to buy new
> batteries..!

If that were true, they'd want us to top up our NiCd and NiMH batteries
twice a day, right? And we'd still be using NiCd (which is a great battery
format, *if you use it right*, but almost no one does use it right).

Jim

"Jim MacKenzie" <[email protected]> wrote in message
news:[email protected]...
>
> "Ivor Jones" <[email protected]> wrote in message
> news:[email protected]...
> > > Just relating what the battery professionals say.
> > >
> >
> > Well they would say that, wouldn't they, after all they want us to buy
new
> > batteries..!
>
> If that were true, they'd want us to top up our NiCd and NiMH batteries
> twice a day, right? And we'd still be using NiCd (which is a great
battery
> format, *if you use it right*, but almost no one does use it right).
>
> Jim
>

Ok, I'm being cynical somewhat, but NiCd and NiMH are well understood
these days and nearly everyone knows you shouldn't top them up. Li-Ion and
Li-Polymer are still relatively new in comparison. I've only come across
one battery type that likes topping up, and that's Lead-Acid. Not seen one
of those to fit a phone yet ;-)

This is my personal experience over several years, YMMV as they say.

Ivor

I know this was originally posted a long time ago. Does anyone have the pin readout for the 14 pin connector used in the CARK-91 cradle?
The wires are arranged in the connector as follows looking from the
back of the holder running from left to right

Blank pin – no wire connected
Orange
Green
Brown
Light Blue
Yellow
Pink
Red
Light Brown
White
Black
Grey
Blue
Purple


Thanks
Peter

I would say, if you don't know what it does, leave it alone :-P