• Code: 41.5
• Display: 41.5 UNEXPECTED TYPE IN TRAY XX
• Description: The printer senses a different media type in the media path than configured in the tray.
• Remedy: 1 If the incorrect type was selected, cancel the job or press ? to access help. 2 Press Up and Down to step through the instructions.

• Code: 41.X
• Display: 41.X PRINTER ERROR
• Description: A printer error has occurred.
  X Description 1 unknown misprint error 2 beam detect misprint error 3 media feed error (size) 4 no VSYNC error 5 media feed error (type) 6 ETB detection error 7 feed delay error 9 noise VSREQ
• Remedy: 1 Press GO to continue or press ? for more information. 2 If the message persists, turn the printer off and then back on.

• Code: 49.XXXX
• Display: 49.XXXX PRINTER ERROR
• Description: A critical firmware error has occurred that caused the processor on the formatter to abort operation. This type of error can be caused by invalid print commands, corrupt data, or invalid operations. In some cases, electrical noise in the cable can corrupt data during transmission to the printer. Other causes include poor quality parallel cables, poor connections, or home-grown applications. On rare occasions, the formatter is at fault, which is usually indicated by a 79 Service Error.
• Remedy: 1 Press CANCEL JOB to clear the print job from the printer memory. 2 Turn the printer off and then back on. 3 Try printing a job from a different software application. If the job prints, go back to the first application and try printing a different file. If the message appears only with a certain software application or print job, contact the software vendor for assistance. 4 If the message persists with different software applications and print jobs, disconnect all cables to the printer that connect it to the network or PC. 5 Turn the printer off. 6 Remove all memory DIMMs or third-party DIMMs from the printer. (Do not remove the firmware DIMM in slot J1.) 7 Remove all EIO devices from the printer. 8 Turn the printer on. 9 If the error no longer exists, install each DIMM and EIO device one at a time, making sure to turn the printer off and back on as you install each device. 10 Replace a DIMM or EIO device if you determine that it causes the error. 11 Remember to reconnect all cables that connect the printer to the network or computer. 12 If the error persists, replace the firmware DIMM. 13 Replace the formatter and calibrate the printer.

• Code: 50.X
• Display: 50.X FUSER ERROR
• Description: A fuser error has occurred.
  X Description 1 low fuser temperature 2 fuser warmup service 3 high fuser temperature 4 faulty fuser 5 inconsistent fuser 6 open fuser
• Remedy: 1 Turn the printer off and allow it to cool down. 2 Reinstall the fuser, and check the connector J4034 that connects the fuser and the printer. Replace the connector if it is damaged. 3 Turn the printer off and remove the fuser. Measure the resistance between the connector pins on the fuser. If resistance does not meet the following guidelines, replace the fuser. J4034-5 to J4034-6: 300 - 500 KOhms J4034-1 to J4034-2: less than 1 KOhm 4 Check for continuity between connector pins J4034-4 and J4034-2. If there is no continuity, replace the fuser. 5 Replace the fuser power supply PCB. 6 Replace the DC controller PCB. Calibrate the printer after replacing the DC controller.

• Code: 51.XY
• Display: 51.XY PRINTER ERROR
• Description: A printer error has occurred.
  X Description 1 beam detect error 2 laser error
  Y Description 0 no color K black C cyan M magenta Y yellow
• Remedy: 1 Press GO to continue. 2 Turn the printer off and then back on. 3 Reseat the connectors between the laser/scanner and DC controller PCB (J1009 - J1012). 4 Replace the defective laser/scanner assembly. Calibrate the printer after replacing the laser/scanner. See “Calibrate Now” on page 294. 5 Replace the DC controller PCB. Calibrate the printer after replacing the DC controller.

• Code: 52.XY
• Display: 52.XY PRINTER ERROR
• Description: A printer error has occurred.
  X Description 1 scanner error 2 scanner startup error 3 scanner rotation error
  Y Description 0 no color K black C cyan M magenta Y yellow
• Remedy: 1 Press GO to continue. 2 Turn the printer off and then back on. 3 Reseat the connectors between the laser/scanner and DC controller PCB (J1009 - J1012). 4 Replace the defective laser/scanner assembly. Calibrate the printer after replacing the laser/scanner. See “Calibrate Now” on page 294. 5 Replace the DC controller PCB. Calibrate the printer after replacing the DC controller

• Code: 53.10.05
• Display: 53.10.05 PRINTER ERROR
• Description: A DIMM is installed in both 168-pin DIMM Slot 4 and 100-pin DIMM Slot 5.
• Remedy: This is an invalid configuration. DIMMs can not be installed in both of these slots at the same time. Remove one of the DIMMs, or move one of the DIMMs to a different slot.

• Code: 53.X0.ZZ
• Display: 53.X0.ZZ PRINTER ERROR
• Description: An error has occurred in the onboard RAM.
• Remedy: 1 Press GO to continue. 2 Turn the printer off and then back on.