AT&T PC 6300 - Page 580

MAINTENANCE
7. Using a cotton swab, clean the bottom of the key mechanism
and the Printed Circuit Board with contact cleaner solution
or light alcohol.
Caution: Be sure that there is no cotton
threads or lint left on the key mechanism or
Printed Circuit Board after you have finished
cleaning the contacts.
8. Replace the key mechanism.
9. Replace the key cap.
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