• Code: 900.05
• Description: Software Error
  Transfer module has failed
• Remedy: 1 1. Turn the printer off. 2. Remove the rear frame cover. See “Rear frame cover removal”. 3. Check the transport cable in connector JTPS1 (A) for proper connection to the system board. 4. Open the front access door and check the transport cable for pinch points and any other damage to the cable or connector. Is the cable damaged? Replace the transport cable. See “Transport cable removal”. Go to step 2.
  2 Replace the transfer module. Does the error clear? Problem resolved. Replace the system board. See “System board removal”.

• Code: 902.01...902.99
• Description: Engine Software Error (except 902.59 and902.60)
  Unrecoverable system software errors.
• Remedy: • POR the printer. • If the error message persists, replace the system board.

• Code: 902.59
• Description: RIP NVRAM MGR problem.
• Remedy: 1 Has the printhead been recently replaced? Replace with a new system board that has never been used before. See “System board removal” Go to step 2.
  2 Has the transfer module been recently replaced? Replace with a new transfer module. See “Transfer module removal”. Go to step 3.
  3 Make sure the printhead is plugged into the connector JPH1. Remove the rear frame cover. See “Rear frame cover removal”. Is the printhead correctly connected? Go to step 4. Reseat the connector.
  4 Has the printhead been replaced recently? Replace with a new printhead. See “Printhead removal, installation, and adjustment”. Contact the new level of support.

• Code: 902.60
• Description: Error communicating with cartridge.
• Remedy: 1. POR the printer. 2. If the error message persists, check for the correct cartridges. 3. Replace the cartridges.

• Code: 903.01...903.15
• Description: Engine Software Error
  Unrecoverable system software errors.
• Remedy: • POR the printer. • If the error message persists, replace the system board.

• Code: 904.01...904.04
• Description: Software Error
  Unrecoverable system software errors.
• Remedy: • POR the printer. • If the error message persists, replace the system board.

• Code: 905.00...905.99
• Description: Software Error
  Unrecoverable system software errors.
• Remedy: • POR the printer. • If the error message persists, replace the system board.

• Code: 906.01...906.04
• Description: Motor (fuser) error service check
• Remedy: 1 1. Turn the printer off. 2. Remove the rear frame cover. See “Rear frame cover removal”. 3. Check the cables in connectors JCARTP1 (A) and JCARTS1 (B) (cartridge motor 1/ fuser motor cable) for proper connection to the system board, for cable pinch points, and for any other damage to the cable or connectors. Is either cable damaged? Replace the cartridge motor1/fuser motor cable. See “Cartridge motor 1/ fuser cable removal”. Go to step 2.
  2 Remove the right cover. See “Right cover removal”. Check the cartridge motor 1/fuser motor cable for proper connection to the EP drive assembly (A), for pinch points for the cable, and for cable or connector damage. Is either cable damaged? Replace the cartridge motor 1/fuser motor cable. See “Cartridge motor 1/ fuser cable removal”. Go to step 3.
  3 Measure the resistance across fuse F6 (A) on the system board. Is the fuser blown? Replace the system board. See “System board removal”. Replace the EP drive assembly. See “Electrophotographic (EP) drive assembly removal”.