Ricoh FW780 Service Manual - Page 195

Rev. 5/95 3. ELECTRICAL COMPONENT DESCRIPTIONS The index numbers refer to the electrical component layout on the reverse side of the Point to Point (Water proof paper). Name Motors Paper Feed Cutter Function Drives all mechanical components except the cutter unit (DC Stepper Motor). Drives the cutter (DC Reversible Motor). Index No. 32 39 Switches Door Indicates "Door Open" on the operation panel and 38 disables the key operation. Left Cutter Detects whether or not the cutter is at the left home 40 position. Right Cutter Detects whether or not the cutter is at the right home 33 position. Sensors Paper End Leading Edge Humidity Detects when the roll paper runs out. 35 Misfeed detector. Also detects the leading edge of the 42 paper to start the paper length pulse count. Detects humidity and turns on the RF antihumidity heaters 34 while copying is not being done (if the humidity is higher than 45%). Printed Circuit Board RF Control Controls all roll cutter unit functions in accordance with 37 copier CPU. Others Upper RF Removes humidity from the roll paper 41 Antihumidity Heater Lower RF Removes humidity from the roll paper 36 Antihumidity Heater SM 7-3 A163