I’m having some problems with my latest acquisition, a Citizen D100.
As you can see in the photo below, the lower (time) display is missing a few segments but they work if I slightly compress the lower edge of the movement.
The upper display and graphical display will not function properly regardless of the amount of cleaning and manipulation of the movement case.

The problem seems to stem from the interface rubbers that connect the PCB to the screen.

Does anyone have any ideas on how to improve the conductivity?

Thanks,
Tom.

Tom
Make sure you have the zebra strips exactly as you removed them. Over the years they will have created little indents to one side where there have been sat on their slightly raised connections.
If you have done this then I think I would try a thin line of tape along the outside edge to increase pressure fractionally.

regards

Adam

I have previously used tape head cleaner fluid (isopropyl alcohol) to clean the rubber contact strips and PCB tracks (use a cotton bud).

Thanks for the tips fellas. Still trying.

Tom.

I have a similar problem with a James Bond 007 watch. The problem in this case is that the very thin plastic display retaining lugs on the module have broken away, leaving the display barely held in, so you need to apply pressure to read it!

So far, I’ve tried using some thin bell wire on the inside of the watch face to apply some pressure, but the face itself has become unbonded, so I need to find another solution to fix the module. Any ideas?

There’s only a couple more that I can think of

1 find a donor plastic case from another james bond watch or possibly another Zeon lcd watch, they may have used identical plastic cases and different pcb boards.
2 I have successfully used some small soldering clamps to get the correct pressure and fast setting epoxy glue to create the join. This is fiddly and a last resort but does seem to work.

Adam

Thanks, DWL.

I cut the metal display securing lugs off a particularly manky cheap Casio watch module and bonded them onto the 007 module with epoxy resin, using crocodile clips to keep the pressure on as the glue was drying, which has been successful.

If I remember these are only soft carbonized foam rubber strips - if similar to the old A638A movement. Try some conductive foam cut to the same size and put some white self adhesive tape either side to protect other components.

Just an idea but it should work.