Texas TI-59: A tale in pictures

[jebem]

Keyboard replacement

Just received a TI-58, made in 1978 Holland, to be used as spares for this TI-59.
The keyboard needs to be removed on both machines, using a good soldering gun and some caution to not destroy the PCB.
It turns out that the PCB quality is first rate on both machines, resisting to a lot of abuse without apparent damage.

TI-59 PCB with the keyboard removed. 14 empty holes waiting for the replacement keyboard.



The original TI-59 keyboard (from 1982) taken apart and cleaned.
I believe I can repair this keyboard as well. Well, I will have a try one of these days.
IMHO the bouncing issue with these keyboards are related to the fact that some of the dome's crimping connections are getting lose with the usage.



The keyboard replacement. Despite being an older unit (1978), it works flawlessly.