Ricoh FW780 Service Manual - Page 328

ELECTRICAL COMPONENTS 1.6 ELECTRICAL COMPONENTS Refer to the electrical component layout on the reverse side of the Point to Point index (Water proof paper). Name Motors Main Exhaust Fan Original Feed (B048 only) Function Index. No. Drives all mechanical components except the fans (DC Motor). 32 Removes the ozone built up around the drum section to the ozone filter (DC Motor). 5 Drives the original feed motor (DC Motor). 45 Magnetic Clutches Registration Drives the registration rollers. 30 Toner Supply Turns on to supply toner to the development unit. 31 Solenoids Pick-off Pawl Moves the pick-off pawls against the drum. 6 Switches Main Supplies power to the copier. 17 Original & Paper Feed Safety Cuts AC power when the original or paper feed unit are opened. 18 Fusing Exit Safety Cuts AC power when the fusing exit unit is opened. 12 Used Toner Cover "Door Open" is displayed on the operation panel 48 when the used toner cover is open. Sensors Door Open Indicates "Door Open" on the operation panel and prevents operation. 29 Toner Density Detects the density of toner in the developer. 26 Original Registration Activates when the leading edge of the original passes the front of the exposure glass. 4 Light Measures the intensity of the exposure lamp's output. 27 Entrance Feed Activates when copy paper is inserted (jam detector). 24 Registration Activates when copy paper arrives at the registration rollers (jam detector). 25 Exit Detects jams through the fusing exit unit. 7 Original Entrance Measures the original length and detects jams. 43 (B048 only) Original Rear Detects original jams. 44 (B048 only) Exit Cover Open Indicates "Door Open" in the operation panel and 47 prevents operation. Toner Overflow Detects whether the used toner tank is full or not. 46 B047/B048 1-6 SM