Error Messages and Codes 3-5Messages, Codes, and ProceduresThis section correlates the output of the printer’s diagnostic aids and provides thetroubleshooting procedure to locate and correct reported errors.Error Message AbbreviationsDue to limited space, some error messages, procedures, or descriptions includeabbreviations. The most common abbreviations used are listed here.Term Definition CommentReg or REGI Registration Used in designators such as Reg SNR.SNR Sensor Often seen as SNR1 or Reg SNR.CW Clockwise Rotational directionCCW Counter-clockwise Rotational directionDUP Duplex Optional for 2-sided printingI/P Board Image Processor Image Processor BoardLTA Lower Tray Assembly Optional 550-Sheet Feeder (Tray 3)HCF High-Capacity Feeder Optional 1100-Sheet FeederMSI or MPT Multi-Sheet Input Used to describe Tray 1 (MPT).P/J Plug/Jack Plug (P) and or Jack (J) designatorsSW Switch Appears as a designator.NVM Non-volatile Memory Used instead of NVRAM.CRUM Customer-Replaceable UnitMonitorDevice used to store usage information on theImaging Unit and Toner Cartridges.Comm Communication As in Comm ErrorTNR Toner Used as an abbreviation for Toner.FDR Feeder Used as an abbreviation for Feeder.FSR Fuser Used as an abbreviation for Fuser.ADC Automatic Density Control Designator for the ADC Sensor.ATS Automatic Thickness Sensor Feature using the Media Thickness Sensor toautomatically determine media weight.LVPS Low-Voltage Power Supply Primary power supplyLED Light-emitting Diode Light source for drum exposure and sensors.PWB Printed Wire Board Used to describe a circuit board.HVPS High-Voltage Power Supply Supplies voltages to the Imaging and Laser units.IU Imaging Unit Used as an abbreviation for Imaging Unit.I/F Interface Used as an abbreviation for an interface.Sub-CPU Secondary processor Device located on the Motor Driver Board.Comp Compensation Used as an abbreviation for Compensation.
