TM 9-2350-261-1011. Move driving lights switch toOFF.12. Move I.R. POWER switch toOFT.13. Turn MASTER SWITCH OFF’.WARNINGHigh voltage inthe M19 periscopecan cause seriousinjury or death.Voltage could ex-ceed 16,000 volts.To avoid accidents, observe thefollowing:Before disconnecting powercable from M19 periscope,always wait at least twominutes after turning I.R.P O W E R a n dMASTERSWITCH OFF.Do not disconnect powercable until image disappearsfrom periscope screen.Never touch end of powercable or allow it to contactmetal surfaces.14. Remove periscope power cablefrom periscope.15. Connect periscope power cable tostowage receptacle on masterswitch panel. Stow excess cableagainst bulkhead behind fixedfire extinguisher tube.END OF TASKChange 52-211
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