[sdiy] what's the trick with these ribbon connectors?

[Adam Inglis]

Thanks Steve et al

The trick to it is:-

you push down gently on the central part of the housing, and this  
allows you to pull the ribbon wires up and out.

See pics
http://www.adambaby.com/images/tech%20pics/R8wiretrap01.jpg
http://www.adambaby.com/images/tech%20pics/R8wiretrap02.jpg
http://www.adambaby.com/images/tech%20pics/R8wiretrap03.jpg

cheers
Adam

On 12/11/2014, at 6:53 AM, Steve Lenham wrote:

> Hi,
>
> I'm going to respectfully disagree with those who say it is just a  
> fixed connector.
>
> If that is the case, why in the photo does it clearly have spring  
> contacts? They are the last thing that you would choose for a  
> reliable permanent connection. Every hard-wired ribbon connector  
> that I have ever encountered has either:
>
> a) IDC (insulation-cutting) forked contacts, or
>
> b) individual crimp terminals on each conductor with a solder tail  
> that goes straight through the PCB.
>
> Those spring contacts are not going to lock the cable in place and  
> neither is it soldered to the PCB. So something else is holding the  
> cable in place and I suggest that a friction clamp arrangement is  
> most likely.
>
> But I have been wrong before ;-)
>
> Cheers,
>
> Steve L.
>
>
> On 11/11/2014 20:16, Laurie Biddulph wrote:
>> They look like a 'transition' connector and are permanently  
>> soldered to
>> the board. They provide a fixed pcb-to-cable connection. One end of  
>> the
>> cable (the one in your picture) is fixed, the other end is usually
>> removable
>>
>> Best Regards
>> Laurie Biddulph
>
>>
>>
>> On 11/11/2014 10:42 PM, Steve Lenham wrote:
>>> On 11/11/2014 10:20, Adam Inglis wrote:
>>>> In attempting to repair my Roland R8 drum machine, I came across a
>>>> ribbon connector that I was unfamiliar with.
>>>
>>>> what is the trick with these things?
>>>
>>>> http://www.adambaby.com/images/tech%20pics/R8ribbonconn.JPG
>>>>
>>>> cheers
>>>> Adam
>>>
>>> Without seeing the top it is hard to be sure, but this looks like  
>>> one of
>>> the connectors which has a movable top section which is pushed  
>>> down to
>>> lock the stripped ends of the ribbon in place. To unlock and  
>>> remove the
>>> cable you generally need to prise up the locking part to release the
>>> pressure on the conductors.
>>>
>>> It isn't always obvious which part moves and which part doesn't.
>>>
>>> HTH,
>>>
>>> Steve L.
>>> _______________________________________________
>>> Synth-diy mailing list
>>> Synth-diy at dropmix.xs4all.nl
>>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>>
>>
>>
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>