. OPERATION EXPLANATION OF COMPONENTS REMARK 3 - 39 ROOM LAMP SWITCH The switch ( 25) is u sed to t urn t he room lamp ON and OFF. Position (a): OFF Position (b): Lights up whe n the door Position (c): Lights The r oom lamp l ights up eve n when the main switch is OFF, so when leaving th e operator's seat, set the switch to position (a) or (b) When carrying o ut operations with the door fully opened, set the switc h to positio n (a)