HEWLETT-PACKARD HP 11C DISASSEMBLY

Although vintage Hewlett-Packard calculators were designed and built very well, occasionally they do need repair.

The following documents the initial disassembly of an HP-11C (Voyager series) calculator. It was built in 1985.

STEP 1
The keyboard is covered with cellophane tape to keep the keys in place when the two halves are separated.

STEP 2
On the back, peel up the rubber "foot" at each corner and remove the screw underneath.

STEP 3
Carefully separate the top and bottom halves of the calculator.

STEP 4
Remove the rubberized sheet between the keys and the printed circuit board.

STEP 5
Here's a close-up of the domed keypad, built into the circuit board.

Sometimes cleaning around an intermittent keypad will help cure entry problems.

STEP 6
The entire printed circuit board may be removed from the back shell for further troubleshooting and repair or replacement.


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Last updated February 22, 2003