22 Paper Out or Paper Jam

	Check for paper in the paper tray
	Check the size of the paper in the paper tray to see if it is the same as what the printer is set for.
	Defective D-roller
	Debris in the paper path
	Gears not turning or broken gear
	Defective paper tray
	Broken input sensor flag
	Defective input sensor board
	Defective system cable 2
	Defective system board

23 Paper Jam Same as 22 with these additions:

	Exit Sensor flag (Fuser)
	Exit Sensor board (Fuser)
	System cable 1

24 Invalid Manual Feed

	Paper feed into the Manual feed when printer is pulling paper off paper tray
	Don't feed paper in the manual feed unless requested
	See 23

30 Open Cover

	Install Toner Cartridge
	Check the Switch activator (hangs down on left side of Top Cover)
	Check output voltages on the low voltage power supply. See Page 2-19 in the service manual
	Replace the high voltage power supply
	Replace system cable 2 (NOTE: the HVPS and system cable 2 can be checked by checking continuity across J14-5 and J14-6 and activating the switch on the HVPS)
	Replace the system board

31 Change Paper

	Paper size requested by the software is different than the installed paper
	Install the correct size paper and change size setting to match
	Software setup
	System board

31 Change Envelope

	Envelope size requested by the software is different than installed paper
	Install the correct size envelope and change size setting to match
	Software setup
	System board

35 Paper Error See 23

 

36 Load Paper See 23

 

37 Stop Command Received

	Press Start/Stop to clear
	Software setup
	Software drivers
	System board

40 System Board Failure

Replace system board

41 Requested Font Not Available

	Install requested font and try again (font card or software)
	Software setup problem
	Defective font card
	Defective system board

42 Requested Font not Available See 41

 

43 Font Card Error

	Font card removed with power turned on. Cycle power
	Defective font card
	Defective system board

44 Font Card Error See 43

 

45 Downloaded Font Error

	Software setup
	Software drivers
	System board

46 Download Character Error See 45

 

47 Language Error Normal Mode (IBM)

	Unsupported card installed
	Defective card
	Defective system board Postscript Mode
	Make sure that Postscript is selected on printer and computer
	Make sure that a Postscript font card is being used
	Defective font card
	Defective system board

54 Serial Error

	Check serial configuration settings (printer and computer)
	Communication cable
	I/O card in Computer
	System board

55 Font Error See 45

 

89 Output Tray Full (4029-04x only)

	Remove paper from output tray
	Check flag operation
	Replace the card photo sensor
	Replace the cable
	Replace the system board

900 System Board Failure

	Remove options and try again (NOTE: when removing the Postscript board, you must replace the 2 IBM ROMs)If the printer now works, replace options one at a time to test them
	Replace system board
	Defective system board

910 Font Card Failure

	Reseat font card
	Defective font card
	Defective system board

920 Fuser not up to temperature

	Check resistance of the fuser, lamp, thermofuse, thermistor
	Low voltage power supply There is no reliable check, other than to exchange the part out
	System cable 1Check for continuity
	Fuser power cable Check for continuity
	System board

921 Fuser not up to Temperature See 920

 

922 Fuser not up to Temperature See 920

 

923 Fuser Over Temperature See 920

 

930 Mirror Motor (not up to speed)

	Reseat cables between the print head and the system board
	Defective print head
	Defective cables
	Defective system board

931 Mirror Motor speed detect error See 930

 

932 Mirror Motor speed detect error See 930

 

940 Laser Beam detect failure See 930

 

941 Laser beam detect failure See 930

 

950 System Board Failure See 900

 

960 Memory Error See 900

 

970 Fan not turning

	Reseat cables between the fan and the system board
	Replace the fan
	Replace the cables
	Replace the system board

980 System Board Failure See 900

 

990 System Board Failure See 900