HP 15C LCD Replacement

[Marcovecchio]

I don't have pictures, but the first step would be to remove the black film that wraps the module. I'm pretty sure it's not important to reinstall it, so don't worry about keeping this film intact.

I'm not sure about this paragraph, since I never opened a module like this, but here goes: the metal frame surrounding the LCD will have tabs folded over the pcb, to keep pressure on the two zebra strips you will find below the LCD, at the edges. Unfold the tabs carefully, pull the metal frame, and you will have the LCD loose, and ready to be replaced.

If you can, transplant the LCD WITH the attached zebra strips, avoid unattaching then from the LCD glass. Electrical contact there is delicate, any dirt will make it fail, and cleaning is very tedious. When replacing, you have to realign PCB tracks to almost invisible electrodes in the glass. I do that with magnifying glasses. Some models are hard to align, like the hp48 series, but Voyagers are easier, and the most recent models have pins that fit in PCB holes to make the alignment. I don't know if these older modules also have alignment pins.

The first Voyager LCD model has been fitted to machines built until 1987 (serial 27XXXXXXX). Source: http://www.brouhaha.com/~eric/hpcalc/voy...iants.html

Good luck!

Eduardo

PS: what started the bleed? Was it spontaneous? Or the calculator suffered a drop?