Nidec DT-3015P, Instruction Manual, Page: 7 / 40

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2.3 How to put on the Rubber cover
3 Part names and functions
3.1 Main unit
Xenon Lamp
Power Switch
Power Cable
Operation Panel
Power OFF
Power ON
*This figure shows when the power is off
Please put on the Rubber cover (one of included accessories) before use.
Fit the groove inside the rubber cover with the outer plastic frame on the
front of the main unit, and attach it.
*Do not pull the cover forcibly.
It may cause damage.