Canon iPF825, Service Manual

Page: 94 / 316

Chapter 2
2-24
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 a white plate attached to it, so that a reference value can be calculated during carriage height measurement by measuring the intensity
of light reflected upon the white plate.
(Service mode: SERVICE MODE>ADJUST>GAP CALIB.)
h) Shaft cleaner
The shaft cleaner located in the right side 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 [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]