¿ªÔÆÌåÓý

ctrl + shift + ? for shortcuts
© 2025 Groups.io
  1. FT-857
  2. Topics

Stripes on display

 

I am sure this has been asked before, but is there a fairly easy way to get rid of a few vertical stripes on the FT957 display? The seem to come and go.

73, Zack W9SZ
 

Zack,
The short answer is, NO, there's no EASY way to solve this problem, except replacement of the assembly.
Here's the longer answer, and the reason why.
The failure is a poor or decaying soldered connection between the display screen and its mating circuit board, inside the control panel. To the best of my knowledge, no actual parts have failed, so replacement of components shouldn't be necessary.
HOWEVER, re-soldering the pads requires a fairly complex set of soldering skills, and likely, specialized equipment. Not a trivial job, certainly not quick and easy.

Do some searching, and you'll find lots of other threads about this around the Web, and huge amounts of mis-information and superstition-based answers.
Good luck sorting it all out!
 

This is what it looks like inside the FT-857 Display Panel

FT-857 Display Panel Solder Connections.jpg

 

¿ªÔÆÌåÓý

Hello All,

?

So far, my 857 keeps on tick¡¯n, however, we used to utilize some old industrial power monitors that developed stripes on the lcd displays and found that if the Zebra strips were just replaced, the displays would work without the stripes.? Zebra strips are used in place of wire conductors between the glass Indium conductors of the actual LED display and the PCB that drives it.?

?

Fluke meters a while back also had the same problem.? I¡¯ve had to get them replaced on my 87 from time to time.? Age tends to shrink the Zebra strips so the contact will become intermittent.

?

This link is the first page that showed up on Google.? I don¡¯t represent the company or its products in anyway.

?

Zebra strips:

?

?

Your mileage may vary though.

?

--jeff

Wb7aht
 

I've cleaned many zebra strips on various LCD displays with good success. My understanding of the FT857 is that zebra strips are not the problem. They evidently use some kind of adhesive between a flexible bc board and another pc board. I don't know how to deal with that.

Are replacement boards from Yaesu more reliable, or are they eventually going to suffer from the same problem?

73, Zack W9SZ


On Mon, Jul 19, 2021 at 9:41 AM J. chang <felix1063@...> wrote:

Hello All,

?

So far, my 857 keeps on tick¡¯n, however, we used to utilize some old industrial power monitors that developed stripes on the lcd displays and found that if the Zebra strips were just replaced, the displays would work without the stripes.? Zebra strips are used in place of wire conductors between the glass Indium conductors of the actual LED display and the PCB that drives it.?

?

Fluke meters a while back also had the same problem.? I¡¯ve had to get them replaced on my 87 from time to time.? Age tends to shrink the Zebra strips so the contact will become intermittent.

?

This link is the first page that showed up on Google.? I don¡¯t represent the company or its products in anyway.

?

Zebra strips:

?

?

Your mileage may vary though.

?

--jeff

Wb7aht

1 - 5 of 5