When the top cover of the printer is open, the cover-open microswitch turns off to cut the high voltage power and output of not less than 32V. At the same time,

the CPU receives CVOPN signals for indicating the status of the microswitch to handle the cover-open.

When the front cover is open, the microswitch also turns off and the 32V power to the duplex unit is cut. The CPU receives FCOVER signals for indicating the

status of the microswitch to handle cover-open.

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