Canon iPF800 Series Service Manual

Also see for imagePROGRAF iPF810: Brochure Troubleshooting guide Brochure & specs User manual

Contents

Chapter 22-222.3.2.3.2 Structure of Carriage Unit0020-5492iPF810 / iPF820a) Printhead mountThe printhead is secured to the carriage by the printhead fixer cover and the printhead fixer lever.When the printhead is secured to the carriage, the signal contact of the head relay PCB is pressed against that of the printhead to convey print signals.Further, the ink passage from the ink tanks is connected to the printhead via the ink tubes.b) Ink portInk is supplied to the printhead via an ink tube, which runs between the tube guides via joints to reach the carriage and follows up is motion.F-2-12T-2-6c) ControllerThe Carriage relay PCB is connected to the head relay PCB by means of a short flexible cable.The flexible cable between the main controller and the carriage relay PCB follows up the motion of the carriage together with the tube guide.A photocoupler encoder mounted in the lower part of the back of the carriage detects a linear scale reading as the carriage moves.d) Carriage driveMechanical misregistrations in the vertical/horizontal and bidirectional print positions of the printhead mounted can be corrected by selecting Adjust Printer fromthe main menu to shift the print timing.A DC-operated carriage motor drives the carriage reciprocally on the platen by way of the carriage belt.The carriage home position, or the capping position, is detected by the sensor flag on the right side of the carriage and the photointerrupter-based carriage HP sensoron the right side of the printer. When the linear scale position is set as a reference home position for use in subsequent position control operations, the carriage motoris driven by a control signal generated from the main controller PCB.e) Printhead maintenance unitThis printer cleans the printhead with the carriage halted at its home position.Wiping takes through the rotation of the motor.Wiper blades mounted on the carriage wipe the printhead while the carriage is halted at its home position.Wet wiping is carried out for added wiping removal performance, whereby the wiper blades are moistened with glycerin as they are pressed against an absorberimpregnated with glycerin.Maintenance jet ejection is carried out on the cap, at the maintenance jet tray, borderless printing ink tray and on the paper surface.A suction operation is carried out by a suction cap in the purge unit.f) Carriage height adjustment unitThe head height is adjusted with the carriage halted at its home position.The lift motor is driven to rotate the lift shaft within the carriage, in sync with which the lift cams on both sides of the carriage move the head holder up and down,[1] Linear scale [5] Carriage[2] Printhead fixer lever [6] Ink tube unit[3] Printhead fixer cover [7] Carriage motor[4] Electrical contact[7][3][5][2][1][4][6]