Dell 5110cn Color Laser Printer Service Manual - Page 195

Chapter 2 Operation of Diag. - About Sensor There are two types of the sensor in the printer, one is reflective type, and another is transmissive type. A reflective type sensor detects, on the basis of whether or not the light is reflected by the sheet, the paper absence/presence or the sheet such as OHP transparency or others. Transparency Paper Leg_Sec02_015FA A transmissive type sensor is composed of the light-emitting side and the light-receiving side that are placed opposite to each other allowing the light to pass from the former to the latter. On the basis of whether or not the light path is blocked due to the actuator, etc., the sensor detects the paper absence/presence or the moving part position such as at the home position or elsewhere. Actuator Leg_Sec02_016FA The following table shows the correspondence between the sensors and the types. Reflective type (Diag. Code) - Transmissive type (Diag. Code) Full Stack Sensor (DI-0) DUP Jam Sensor (DI-1) Exit Sensor (DI-2) REGI Sensor (DI-3) MSI No Paper Sensor (DI-10) Tray 1 No Paper Sensor (DI-11) Tray 2 No Paper Sensor (DI-12) Tray 3 No Paper Sensor (DI-13) Tray 4 No Paper Sensor (DI-1e) BTR Toner Full Sensor (DI-23) No Toner Sensor Y (DI-18) (Internal signal) No Toner Sensor M (DI-19) (Internal signal) No Toner Sensor C (DI-1a) (Internal signal) No Toner Sensor K (DI-1b) (Internal signal) 2 - 17