Products > Test Equipment
GW Instek LCR-821 LCR Meter Display Issue.......
Smokey:
..well I'm not ahead.. but I'm not as far behind as I was a minute ago.
More dead lines than when I started but not as many as the worst go.
I'm pretty sure what I thought was "bonding" of some sort was actually just the traces from the flex ribbon that delaminated and stuck to the PCB. You can see through the transparent ribbon where the traces came off. Old and crusty.... Since the traces came off the flex ribbon there was nothing really to solder to even if I wanted to point to point repair it.
So the moral of this story is, seriously don't take apart a "LMBHAT014G18CS".
Kean:
According to Google (and Dublin Zoo):
--- Quote ---On average, zebras live for approximately 20 years in the wild, and up to 40 years in zoos
--- End quote ---
It sounds like Zebra contact strips in LCD modules have a similar lifespan.
I've found that cleaning them rarely helps, and lining them back up during reassembly can be super tricky.
Smokey:
--- Quote from: Kean on September 05, 2024, 02:53:52 am ---According to Google (and Dublin Zoo):
--- Quote ---On average, zebras live for approximately 20 years in the wild, and up to 40 years in zoos
--- End quote ---
It sounds like Zebra contact strips in LCD modules have a similar lifespan.
I've found that cleaning them rarely helps, and lining them back up during reassembly can be super tricky.
--- End quote ---
:) Just have to wait for some scientist to genetically engineer their relatives back from extinction:
https://en.wikipedia.org/wiki/Przewalski%27s_horse
The thing that's not working in this display is not the zebra strip. That looks fine. It's the strange ribbon cable like thing that's being used like a zebra strip. Why oh why not just two zebra strips? The world may never know.
Kean:
--- Quote from: Smokey on September 05, 2024, 03:04:29 am ---The thing that's not working in this display is not the zebra strip. That looks fine. It's the strange ribbon cable like thing that's being used like a zebra strip. Why oh why not just two zebra strips? The world may never know.
--- End quote ---
Ah yes, I think I know what you are talking about now. I recall seeing those thin flex ribbons in some LCD modules and cheap calculators.
Buy a new (old stock) module and hope it works...
Smokey:
I need an actual camera for my microscope.. Sorry for the crappy picture..
You can see the real zebra strip on the top (that's fine), and the crappy delaminated ribbon cable on the right. The dark lines are actually the rubber showing through where traces used to be.
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