Dell 5110cn Color Laser Printer Service Manual - Page 196

Chapter 2 Operation of Diag. - About Switch There are two types of the switch in the printer, one is the push-switch detecting close/open of the door or cover, and another is the micro-switch using for safety interlock to safeguard the user. A push-switch closes the internal contacts via the plunger that is pushed down by the actuator of the cover or door that is being closed. When the door or cover has been opened, the plunger is pushed up by the spring in the switch allowing the internal contacts to open. Spring Button Shorting bar Leg_Sec02_017FA A micro-switch closes the internal contacts via the button which is pushed down under the provided leaf spring which is held down by the actuator of the cover or door that is being closed. When the door or cover has being opened, the leaf spring returns to its original position and the button is pushed up by the spring in the switch, allowing the internal contacts to open. Actuator Button Contact Blade Leg_Sec02_018FA The following table shows the correspondence between the push switches and the types. Push switch (Diag. Code) Toner Cartridge Switch Y (DI-8) Toner Cartridge Switch M (DI-9) Toner Cartridge Switch C (DI-a) Toner Cartridge Switch K (DI-b) Cassette 1 Size Switch (DI-38) Cassette 2 Size Switch (DI-40) Cassette 3 Size Switch (DI-48) Cassette 4 Size Switch (DI-50) Micro switch (Diag. Code) Interlock Switch (DI-7) 2 - 18