Chapter 22-32F-2-37Valve cam sensorThe photo inerrupter-based valve cam sensor detects the status of the valve cam on the ink tank unit.The sensor determines that the ink supplyer valve is opened when the rotary flag, which operates in conjunction with the valve cam, cuts off the sensor light.F-2-38Head management sensorThe photo transmission sensor detects whether the printhead is discharging ink.When the carriage arrives at the location for detection, it stops and the ink is discharged from one nozzle of the nozzle array at a time until all the nozzlesare checked for their normal ink discharging operations. This process is repeated for the rest of the 5 nozzle arrays of the printhead.If the sensor light is blocked by the ink discharged from a nozzle and the voltage measured by the sensor changes, that nozzle is proved to work correctly.F-2-39Sensor* Homeposition * During suction * HomepositionRotary flagSensorRotary flag* Close * Close* Close* Close * Close* CloseRotary flag* Ink supply valve(all colors) open* Ink supply valve(Bk) openInk supply valve (Bk)Ink supply valve(all colors)Ink supply valve (Bk)Ink supply valve(all colors)Sensor* Ink supply valve(Bk) open* Ink supply valve(all colors) openPrintheadNozzle unitHead managementsensor unit
