Sharp SVX500 Maintenance Manual page 38

PRECISION MACHINE TOOLS
1) Operation box
Note:
(a) Please well guard the relevant keys.
(b) The dust pan has two security keys.
To prevent the memory to be modified arbitrarily, use the function showed on the right figure.
Emergency stop:
Press this button to halt
the operation
immediately.
Memory edit lock:
This key is used to prevent unauthorized or
arbitrarily changing of the processing procedure.
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Maintenance Manual