|? How to reattach "zebra stripe" LCD connection in TI-30Xa?|
Message #1 Posted by Paul Brogger on 9 Apr 2003, 1:58 p.m.
Off the wall, but a challenge . . .
I'm trying to resurrect a TI-30Xa calculator for my son (the one who WON'T use RPN). A few of the segments don't display in the middle digits.
Upon taking it apart, I see the LCD is connected to the PCB by a flexible multi-line connector that appears to be raised black conductors on a cream-colored "Scotch Tape" (mylar?) substrate.
It appears to simply be bonded to the surface of the LCD along one edge, and to the face of the PCB along the opposite edge. (Indeed, the LCD is attached only via this conductor, and is itself held in place against the bezel by a cushion and the calculator back case.)
By running my finger along the PCB attachement, I locate a couple (presumably) of conductors which are apparently not in contact -- when I press them, the seqments in question turn "on". When I release again, however, they go blank.
(It looks as if the PCB edge of the connector was slightly bowed as it was laid down, and contacts the PCB pads more fully on the left & right ends of the attachment, and less so in the middle.)
I'm wondering if anyone has a suggestion on how to reattach this flexible connector to the PCB traces . . . Is there a "conductive glue" or paint that might do the trick?
(Like I said, the challenge of fixing the thing is the issue, not what little value the calculator may ever have.)