... quick :Beside the nozzle;in the middle;below near the tray,which with the dark red colors,are all sensors.When you put your ... correction for long-term stable job, when the battery runs out, will slow or does not reach the designated position, you need replace ... hand battery replacement battery box, pull out a new battery, the battery using 1rd.7Put the key on the cover lock, counter-clockwise, then ...