Chapter 22-23thereby varying the separation between the face of the printhead and the paper.The printhead height is detected from the lift cam sensor within the carriage and the distance of rotation of the lift motor.g) Multi sensorThe multi sensor attached to the lower left part of the carriage consists of four LEDs (red, blue, green, infrared) and two light-receiving sensors to detect the leadingedges and width of paper and skews in it, and to adjust its registration and head height.The multi sensor reference has a white plate attached to it, so that a reference value can be calculated during carriage height measurement by measuring the intensityof light reflected upon the white plate.(Service mode: SERVICE MODE>ADJUST>GAP CALIB.)h) Rail cleanerThe shaft cleaner located in the right side of the carriage helps keep the main rail clean.i) Internal unit temperature sensorOne thermistor is installed on the head relay PCB on the back of the head holder to detect the internal unit temperature.F-2-13T-2-7[1] Carriage relay PCB [9] Multi sensor reference plate[2] Head relay PCB [10] BP maintenance jet tray[3] Slant adjustment lever [11] HP maintenance jet tray[4] Printhead fixer lever sensor [12] Head management sensor[5] Multi sensor [13] Carriage HP sensor[6] Shaft cleaner [14] Lift cam sensor[7] Lift cam [15] Lift motor[8] Linear encoder[13] [14][11] [12][14][10] [9][1][7][6][2][3][4][5][8]
