Canon iPF780 Series Service Manual

Also see for image Prograf iPF785 Series: Setup guide Basic guide User guide User guide

Contents

Chapter 22-15F-2-12f) Carriage height adjustment unitThe head height is adjusted with the carriage halted at its home position.The lift motor is driven to rotate the carriage height changing cam within the carriage, in sync with which the lift cams on both sides of the carriage move the headholder up and down, thereby 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) Slant adjustment unitThe tilting of the head is adjusted with the slant adjustment lever.The point where the slant adjustment lever axis touches the head holder is offset from the fulcrum of the lever axis. Therefore, the printhead is tilted by moving theslant adjustment lever and moving the position on the right side of the head holder back or forward.F-2-13h) Multi SensorA photo reflective type multi sensor consists of three red LEDs, one red/blue/green LED array, and three light receiving sensors and is used for media end, skew,and width adjustment, registration adjustment, head height adjustment, and print position adjustment.The multi sensor reference has three white plates attached to it, so that a reference value can be calculated during carriage height measurement by measuring theintensity of light reflected upon the white plates.(Service mode: SERVICE MODE>ADJUST>GAP CALIB.)i) Shaft cleaner unitsThe shaft cleaners mounted at the left and right of the carriage are used to clean the carriage and apply oil to the shaft.CarriageSpring (for Printhead Height)Spring (for Printhead Slant)Head HolderLift MotorLift Cam SensorCarriage Height Changing CamSlant Adjustment LeverSpring (for Printhead Slant)Slant Adjustment Lever ShaftLinear Encoder SensorLift Cam SensorLinear ScaleLift Drive UnitMulti Sensor ReferenceHead Management SensorShaft CleanerShaft CleanerMulti SensorCarriage PCB