Yog vim li cas lub teeb qab nthab sab hauv tsis tuaj yeem muab tua yog tias lub pob qhib, thiab nws nyob rau hauv tas li - ntawm hom, yuav tsum tau kaw phau ntawv. Lub teeb khawm ntawm tus tsav tsheb lub qab nthab muaj peb hom: On-Master-On, Qhov Rooj-Open-Off, thiab Off-Off.
Txhawm rau tua lub teeb qab nthab sab hauv: 1. Tig lub teeb sab hauv qab nthab mus rau txoj haujlwm Off; 2. Yog tias qhov hloov mus rau qhov rooj hom, qhib thiab kaw lub qhov rooj dua; 3. Yog tias lub teeb tseem nyob txawm tias thaum lub qhov hloov pauv nyob rau hauv txoj hauj lwm Off, nws yog ib qho tsim nyog yuav tsum tig lub hloov mus rau txoj hauj lwm On thiab rov qab mus rau txoj hauj lwm Off. Yog tias lub teeb tseem ua haujlwm tsis zoo, nws raug nquahu kom kho nws ntawm lub khw kho mob lossis 4S cov neeg muag khoom.
