zebra connector

disply

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

contacts

correct

each

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

Does your expensive multimeter have a manufacturer and model number?

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.

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!

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

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