Mine had the same problem (was: 2E5) Message #5 Posted by Vieira, Luiz C. (Brazil) on 14 Aug 2005, 2:43 p.m., in response to message #4 by Bernhard
Hi, Bernhard;
I have on HP15C withthe same problem: the conductive trails of the flex circuit began to crack. I tried to solder them, but found no long-lasting solution I could think of.
I was given an HP11C with a broken LCD, so I used the case and internals to rebuild the HP15C. I had to remove the keyboard faceplate and the back label of both calculators, but it was somehow hard to remove the HP15C`s back label, so I was only able to use the riginal HP11C case with the HP15C's keys and keyboard faceplate. I also mixed the IC`s, so I used an earlier Voyager processor with a newer R2D2 (after reading it from a serious contributor, I cannot help thinking of the little StarWars robot, but in this case, R2D2 stands for RAM-ROM-Display-Driver...) withthe original HP11C mainboard, because the HP11C had the single maiboard structure. My little frankencalc survived the first lightning ("It`s alive!!") and it is working fine till today.
I wonder if there is a way to build a thin fiberglass PCB that fits the same as the orignal flex PCB so we could rebuild the Voyalgers with this sort of problem. Instead of using the small polymer, we could add a connector like those found in many portables available today.
I have the pictures of the inside of the rebuilt frankencalc, but I have to find them prior to post again. I`ll let you know.
Best regards.
Luiz (Brazil)
Edited: 14 Aug 2005, 2:44 p.m.
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