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N_Cook N_Cook is offline
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Default .02 mm pitch flex print PCB repair

Michael Kennedy wrote in message
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"N_Cook" wrote in message
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Michael Kennedy wrote in message
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I have a Plasma tv that somehow I managed to partially tear one of the

flexi
prints. I am not too sure how it happened since I was working on the

PSU.

That aside, I think the PSU is fixed, but now the .02 mm pitch flexi
print
is torn..

After doing lots of thinking and researching I think the way to go is

using
a .02mm pitch zebra strip and connect wires from it to the connector.

Now the question is does such a zebra strip exsist?

Does anyone know where I can find such a zebra strip? Any know products

I
could salvage one from??

I hope to connect wires to the zebra strip and then connect those wires
to
the more reasonable sized .5mm pitch connector.




What are the end points of the ribbon ? eg 2 connectors or connector and
glass ? and does it flex in use? is it microstrip/stripline in structure
with a grounded backplane?



Fortunately there is no backplane, so I think we can get away with

modified
circuit. I will try to get a picture up on the internet soon.

The cable is directly connected to the glass on one end and has a standard
.5 mm pitch *I think nothing to measure with at the moment* connector.


In the middle just after the tear there is a blob IC attached to the

cable.
The cable is then attached to an alunimum plate for security. I was

thinking
of taking advantage of this alunimum plate by using it as a surface to

mount
a zebra connector..

The cable is curled in a c like shape so I think briding the original
connection is the more dfficult route. I think with a zebra connector and

a
pcb soldering the wires from the end connector to the pcb and the applying
pressure to the zebra strip is a very viable solution. There is the

perfect
place to mount it on top of that aluminum plate.

Anyhow without pictures this is kind of hard to imagine. I will upload a

few
pics..

Thanks for the reply!

Mike



Anyone successfully salvaged that expensive 3M anistotrpic conductive tape?
hot air , is that effective to dislodge the bond but not melt the
tape/destroy the anisotropy?
I just measured a standard size zebra and that had .2mm spacing, I could not
find my tin of watch bits, what is the spacing on those zebras?