Page: 33Service Guide OL830Chapter 2 Principles of Operation2.3.10 Sensor FunctionsPower OnThe inlet and outlet sensors are checked for their on and off states at POWER ON time.Inlet sensor on: Inlet jam error (paper supply jam)Outlet sensor on: Outlet jam error (paper eject jam)The thermistor sensor detects if the fuser temperature reaches the desired temperature within thespecified time. If the desired temperature is not reached, the fuser is turned OFF.The fan sensor circuitry checks for the rotation of the fan. If fan motion is not detected, the fuser isturned OFF, and power is removed from the fan.When an empty paper cassette has been detected, the Paper-End Sensor sends the PAPEREND signal to the Control Unit.When the power supply is turned ON, the number of printed pages of the fusing unit and drumcartridge is checked. If the Fuser or Drum life has been exceeded, this information is transmittedto the Control Unit.HoppingWhenever the inlet sensor fails to detect paper within a predetermined time after a feed commandhas been issued to the paper supply system, the failure is counted. The hopping operation is thenattempted up to three times. If the hopping operation still fails, an INLET JAM ERROR is displayedon the Operation Panel.FeedingIf the leading part of the paper does not reach the outlet sensor within a predetermined time afterthe start of feeding by the resist motor, a FEED JAM ERROR will be displayed on the OperationPanel.Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA BusinessPartner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
