TEXAS TI-59
For many, the best calculator in the 70's. Powerful and low cost made it so popular.
Card Reader.
Power adapter / Charger
Model AC 9900/H 6.2VAC / 200mA / 3VA
Replacement Battery - wrong type, soldered to the calculator, and dead
After cleaning
Documentation
Read Heads signal:
Keyboard replacment:
Initial testing:
Three jumpers are needed in order to a successful power On.
On the 8-pin female connector, from left to right in the picture:
- Connect together the 2nd, 3rd and 4th pins (power on switch);
- Connect the 5th and the 8th pins (card reader sensor);
- Connect the 6th and the 7th pins (card reader sensor).
Repairing the battery connector::
Assembling:
Final testing: