Ricoh FW780 Service Manual - Page 233

Overall Information ELECTRICAL COMPONENT DESCRIPTIONS 1.6 ELECTRICAL COMPONENT DESCRIPTIONS Refer to the electrical component layout on the reverse side of the Point to Point (Water proof paper) index numbers. Name Motors Main Exhaust Fan Original Feed (A252 only) Function Index. No. Drives all mechanical components except the original feed section (A252only) and the fans. (DC 32 Motor) Removes the ozone built up around the drum section to the ozone filter. (DC Motor) 5 Drives the original feed section. (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 is opened. 18 Fusing Exit Safety Cuts AC power when the fusing exit unit is opened. 12 Sensors Door Open Indicates "Door Open" in the operation panel and prohibits the key operation. 29 Toner Density Detects the density of toner in the developer. 26 Original Registration Detects when the original lead edge passes at the front of the exposure glass. 4 Light Detects the intensity of the exposure lamp output. 27 Entrance Feed Detects when copy paper is inserted (jam detector). 24 Registration Detects when copy paper arrives at the registration rollers (jam detector). 25 Exit Detects jams through the fusing exit unit. 7 Original Entrance Detects the original length and the original jam. 43 (A252 only) Original Rear Detects the original jam. 44 (A252 only) Exit Cover Open Indicates "Door Open" in the operation panel and 47 prohibits the key operation. SM 1-7 A251/A252