• Code: 948.xx, 949.xx
• Description: Failed engine board
• Remedy: Replace the controller board.
  Warning: Do not replace the operator panel and controller board at the same time. Each card contains the printer settings. When either of these cards is new, it obtains some of the settings from the other card. Settings are lost when both are new and replaced at the same time. POST (Power-On Self Test) Note: The printer should complete POST in approximately 30 seconds. If the printer fails to display lights or activate the drive motor, fuser, or fan, then check the following order: 1.Power to the LVPS/HVPS 2.Power from the LVPS/HVPS to the controller board 3.Cables are plugged in correctly, especially for the operator panel. The printer will not power-up without a functioning operator panel. 4.The controller board assembly. The LED adjacent to J12 will be illuminated if the card is powered and good. 5.The operator panel. See “Operator panel service check”. Verify +24 V dc input from the LVPS/HVPS. 1.Turn the printer off. 2.Disconnect the LVPS/HVPS cable from the controller board at J22. 3.Turn the printer on. 4.Verify +24 V dc on positions 6, 17, and 19 of the cable connector (LVPS/HVPS). 5.If voltage is correct, then check the continuity in the other conductors of the cable. If the cable is good, then turn the printer off, and check the connectors to the controller board. 6.Verify that pins 10, 12, 14, 16, and 18 on both the cable and the card connector are grounded. 7.If grounds are not correct on the cable, but the cable passes continuity otherwise, then check the LVPS/HVPS. 8.If the grounds are not correct on the controller board, then replace the controller board. (Check with one probe on the connector pin and the other on the card’s ground plane found at each screw head.) Controller board voltage outputs Turn the printer off, and plug the LVPS/HVPS cable into J22 of the controller board. See the wiring diagram at the end of the manual which identifies the output voltages and grounds for a good controller board. Turn the printer off before plugging or unplugging any connectors.

• Code: 950.xx
• Description: Mismatch between EEPROM and mirror memory Note: A new controller board or operator panel has been installed, and has not been properly prepared for this use. Install a new note. Do not install both the controller board and the operator panel at the same time without a POR in between.
• Remedy: Install a new controller bored or operator panel.
  Warning: Do not replace the operator panel and controller board at the same time. Each card contains the printer settings. When either of these cards is new, it obtains the settings from the other card. Settings are lost when both are new and replaced at the same time. Lights If the LCD does not come on, then open the controller board cage and locate the operator panel connector at J14. Make sure the cable is properly connected to the controller board and the controller board has input voltage to it. With the printer on, verify the following without disconnecting the cable: • Pins 1, 3, 5, and 6: 3.3 v • Pin 2: 5 v • Pins 4 and 7: GND If these are approximately correct and the operator panel is not functioning, then replace the operator panel. If any are incorrect, then see “Controller board service check”. Buttons If the buttons do not respond, then replace the operator panel. There is no test or repair for the faulty switches on the operator panel.

• Code: 951.xx
• Description: Error with secure NVRAM on the controller board
• Remedy: Replace the controller board.

• Code: 952.xx
• Description: A recoverable MVRAM Cyclic Redundancy Check error occurred.
• Remedy: Performing POR will clear this error.

• Code: 953.xx
• Description: NVRAM chip failure with mirror
• Remedy: Replace the operator panel.

• Code: 954.xx
• Description: NVRAM chip failure with system part.
• Remedy: Replace the controller board.

• Code: 955.xx
• Description: The code ROM or NAND flash failed the Cyclic Redundancy Check or the NAND experienced an uncorrectible multi-bit failure.
• Remedy: Replace the controller board.

• Code: 956.00
• Description: RIP card failure: processor failure
• Remedy: Replace the controller board.