zebra connector

[Vale]

My expensive multimeter has got broken plastic pins that hold the lcd disply
on the pcb.
In spite of all my efforts I can't correctly align the zebra contacts.
Is there anybody willing to explain me how to do it?
Thanks

 

[N_Cook]

Vale <vale@fastwebnet.it> wrote in message
news:kWOEp.29095$GZ3.9073@tornado.fastwebnet.it...

My expensive multimeter has got broken plastic pins that hold the lcd
disply
on the pcb.
In spite of all my efforts I can't correctly align the zebra contacts.
Is there anybody willing to explain me how to do it?
Thanks

Zebra contacts are self-aligning thats the point of them. Assuming contacts
and zebra are clean and good and gap between pcb and LCD glass is correct
then all should be well, at least one zebra contact should lie between each
pcb pads and its corresponding lcd land

 

[Smitty Two]

In article <is0gie$ncs$1@dont-email.me>, "N_Cook" <diverse@tcp.co.uk>
wrote:

Vale <vale@fastwebnet.it> wrote in message
news:kWOEp.29095$GZ3.9073@tornado.fastwebnet.it...
My expensive multimeter has got broken plastic pins that hold the lcd
disply
on the pcb.
In spite of all my efforts I can't correctly align the zebra contacts.
Is there anybody willing to explain me how to do it?
Thanks




Zebra contacts are self-aligning thats the point of them. Assuming contacts
and zebra are clean and good and gap between pcb and LCD glass is correct
then all should be well, at least one zebra contact should lie between each
pcb pads and its corresponding lcd land

With the alignment pins broken off, how do you suggest OP correctly
positions the display WRT the PCB?

 

[N_Cook]

Smitty Two <prestwhich@earthlink.net> wrote in message
newsrestwhich-069B08.10540030052011@news.eternal-september.org...

In article <is0gie$ncs$1@dont-email.me>, "N_Cook" <diverse@tcp.co.uk
wrote:

Vale <vale@fastwebnet.it> wrote in message
news:kWOEp.29095$GZ3.9073@tornado.fastwebnet.it...
My expensive multimeter has got broken plastic pins that hold the lcd
disply
on the pcb.
In spite of all my efforts I can't correctly align the zebra contacts.
Is there anybody willing to explain me how to do it?
Thanks




Zebra contacts are self-aligning thats the point of them. Assuming
contacts
and zebra are clean and good and gap between pcb and LCD glass is
correct
then all should be well, at least one zebra contact should lie between
each
pcb pads and its corresponding lcd land

With the alignment pins broken off, how do you suggest OP correctly
positions the display WRT the PCB?

I assume some stubs or marks remain where the plastic pins broke off. Drill
and glue some replacement pins , as long as within half a land of true then
should line up

 

[Jeff Liebermann]

On Mon, 30 May 2011 17:43:17 +0200, "Vale" <vale@fastwebnet.it> wrote:

My expensive multimeter has got broken plastic pins that hold the lcd disply
on the pcb.

Does your expensive multimeter have a manufacturer and model number?

In spite of all my efforts I can't correctly align the zebra contacts.
Is there anybody willing to explain me how to do it?

What does the display show? A few segments missing? A few digits
missing? Nothing perhaps?

You might align it visually. The problem is positioning the strip at
an angle, where the conductive parts of the Zebra strip will short two
adjacent contacts on either the display or the PCB. Without any means
to align the display and the PCB, that's quite a challenge. If the
Zebra strip is the same spacing as the display and PCB contacts, then
correct alignment is mandatory. However, if the spacing on the Zebra
strip is considerably smaller than the PCB and LCD spacing, then the
connector can tolerate considerable misalignment and still work.

There's also a question of how are you going to keep it aligned and
properly compressed with a broken mounting frame. Methinks your best
approach is to find the broken plastic pieces, and attempt to repair
the plastic frame first. Another approach would be to identify the
manufacturer of the mounting frame/pins/whatever, and obtain a
replacement. Lastly, if the multimeter is truly expensive and a
repair is justified, the manufacturer may have a repair/exchange
program.

Also, after many years, some elastometric and other rubber connectors
tend to leak whatever oil is used to keep the rubber flexible. When
connected, it's not a problem, but once moved, the oil film acts as an
insulator. Lightly clean both the PCB and LCD with alcohol to remove
any oil.

--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

 

[Vale]

"Jeff Liebermann" <jeffl@cruzio.com> ha scritto nel messaggio
news:ev1au6l4fk6hevq9fvne7qhm8q5cp0qqrg@4ax.com...

On Mon, 30 May 2011 17:43:17 +0200, "Vale" <vale@fastwebnet.it> wrote:

My expensive multimeter has got broken plastic pins that hold the lcd
disply
on the pcb.

Thanks all.I solved, hope for long time.
I've been luky, the dirt that was on the meter case display window was
perfectly corresponding to the dirt line on the display.
So I found the right position.
It has been not so easy to align the display on pcb, I supplied the meter
with a voltage, tried hundreds of positions until it displaied the rights
measurement.
I got help from a pair of chinese spring loaded clamps to firmly block the
display and put some drops of cyanoacrylate on corners.
Than used plenty of epoxy glue to make it stable.
The meter now works quite perfectly, only the last digit is incomplete, but
I'm happy anyway.
At least that experience has provided more knowledge to zebra gadgets.
Thanks everybody and....don't keep your meters too clean!

 

[Shaun]

"Vale" wrote in message news:jK8Fp.29619$GZ3.6759@tornado.fastwebnet.it...


"Jeff Liebermann" <jeffl@cruzio.com> ha scritto nel messaggio
news:ev1au6l4fk6hevq9fvne7qhm8q5cp0qqrg@4ax.com...

On Mon, 30 May 2011 17:43:17 +0200, "Vale" <vale@fastwebnet.it> wrote:

My expensive multimeter has got broken plastic pins that hold the lcd
disply
on the pcb.

Thanks all.I solved, hope for long time.
I've been luky, the dirt that was on the meter case display window was
perfectly corresponding to the dirt line on the display.
So I found the right position.
It has been not so easy to align the display on pcb, I supplied the meter
with a voltage, tried hundreds of positions until it displaied the rights
measurement.
I got help from a pair of chinese spring loaded clamps to firmly block the
display and put some drops of cyanoacrylate on corners.
Than used plenty of epoxy glue to make it stable.
The meter now works quite perfectly, only the last digit is incomplete, but
I'm happy anyway.
At least that experience has provided more knowledge to zebra gadgets.
Thanks everybody and....don't keep your meters too clean!

What brand is your meter? You can probably order parts for it if it is not
too old. When you do order parts, order new zebra strips aswell.

Shaun

 

[Vale]

"Shaun" <spam@nomail.com> ha scritto nel messaggio
newsagFp.19079$pi2.11588@newsfe11.iad...

"Vale" wrote in message
news:jK8Fp.29619$GZ3.6759@tornado.fastwebnet.it...


"Jeff Liebermann" <jeffl@cruzio.com> ha scritto nel messaggio
news:ev1au6l4fk6hevq9fvne7qhm8q5cp0qqrg@4ax.com...
On Mon, 30 May 2011 17:43:17 +0200, "Vale" <vale@fastwebnet.it> wrote:

My expensive multimeter has got broken plastic pins that hold the lcd
disply
on the pcb.


Thanks all.I solved, hope for long time.

What brand is your meter? You can probably order parts for it if it is
not too old. When you do order parts, order new zebra strips aswell.

It's a Chauvin Arnoux. It is a good idea investigate on spares/kits.I'll do

it, thanks.