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Chapter 2

2-25

The 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 leading

edges and width of paper and skews in it, and to adjust its registration and head height.

The multi sensor reference has the white plate attached to it, so that a reference value can be calculated during carriage height measurement by measuring the in-

tensity of light reflected upon the white plate.

(Service mode: SERVICE MODE>ADJUST>GAP CALIB)

h) Shaft cleaner

The shaft cleaner located in the right rear of the carriage helps keep the carriage shaft clean.

i) Internal unit temperature sensor

One thermistor is installed on the head relay PCB on the back of the head holder to detect the internal unit temperature.

F-2-12

[1] Carriage relay PCB [7] Shaft cleaner

[2] Multi sensor [8] Maintenance jet tray

[3] Head relay PCB [9] Carriage HP sensor

[4] Lift cam sensor [10] Multisensor reference

[5] Sensor flag [11] Head management sensor unit