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
9920 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 1: Check 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
