display has no hard wire connections.

[Denny B]

There are face plate displays on car audio ( e.g.. CD players ) that
when you disassemble the
faceplate there are no hard wire connections between the display and
the
printed circuit board. I don't know what you call it but the bottom of
the
display has like two rubber strips that press against dozens of carbon
points
on the printed circuit board, this is how the display operates.

You have a similar display setup on Fluke 77 meters ( I don't know
about other Fluke
Meters ). How exactly does this rubber strips ( if they are rubber
strips ? ) connecting to
carbon points work? What are the strips called ? What is this type of
connection called.

Can you clean the display rubber strips with rubbing alcohol if only
part of the
display works. Physically pressing on the display produces different
effects
on the display.

Your help appreciated.

Thanks in advance
Denny B

 

[John Todd]

On Wed, 24 Dec 2003 11:33:31 -0700, Denny B <dmrbaptie@sprint.ca> wrote:

There are face plate displays on car audio ( e.g.. CD players ) that
when you disassemble the
faceplate there are no hard wire connections between the display and
the
printed circuit board. I don't know what you call it but the bottom of
the
display has like two rubber strips that press against dozens of carbon
points
on the printed circuit board, this is how the display operates.

You have a similar display setup on Fluke 77 meters ( I don't know
about other Fluke
Meters ). How exactly does this rubber strips ( if they are rubber
strips ? ) connecting to
carbon points work? What are the strips called ? What is this type of
connection called.

Can you clean the display rubber strips with rubbing alcohol if only
part of the
display works. Physically pressing on the display produces different
effects
on the display.

Your help appreciated.

Thanks in advance
Denny B

The rubber strips have embedded conductors crossing them.
I have been successful cleaning them, but have also had failures.



--
_______________________________________
John E. Todd <> jtodd@island.net

Note: Ensure correct polarity prior to connection.

 

[CWatters]

Denny B" <dmrbaptie@sprint.ca> wrote in message
news:M_kGb.97$qP5.899@newscontent-01.sprint.ca...

How exactly does this rubber strips ( if they are rubber
strips ? ) connecting to carbon points work?

See this page for how they are made....

http://www.fujipoly.com/products/genProduct.asp?ProductName=Carbon&ProductLine=Zebra

Click the links on the left to see slightly different versions.


Quote:
FUJIPOLY ZEBRAŽ connectors have alternating layers of conductive
carbon-filled and non-conductive silicone rubber. They make reliable
connections by being deflected between contacting surfaces. ZEBRA
connectors are used for connecting any LCD from small displays for watches
to large area displays for instruments. Table A shows the different types
of ZEBRA connectors available. Table C shows performance characteristics.
end quote:

Colin