• Code: 955.xx...958.xx
• Description: 955.xx The code ROM or NAND flash failed the Cyclic Redundancy Check or the NAND experienced an uncorrectible multi-bit failure. 956.00 RIP card failure: processor failure 956.01 Processor overtemp 957.xx RIP card failure: ASIC failure 958.xx Printer has performed more than 100 “shift and reflash” operations as a result of ECC bit corrections
• Remedy: Replace the controller board. Controller card assembly Verify +24 V dc input from the LVPS/HVPS. • Turn the MFP off. • Disconnect the LVPS/HVPS cable from the controller card at J22. See “Controller card” for more information. • Turn the MFP on. Verify +24 V dc from the cable connector of J22, pins 8 and 9. Verify that pins 7, 12, and 14 on both the cable and the card connectors are ground. • If voltage is correct, check the continuity in the cable. If the cable is good, see the “Controller card” for more information. • If grounds are not correct on the cable, first check it for continuity and then check the LVPS/HVPS. See “LVPS/HVPS service check” • If the grounds are not correct on the controller card, replace the controller card. (Check with one probe on the connector pin and the other on the ground plane of the card found at each screw head.) Note: With all cables connected, the MFP should complete POST within approximately 12–15 seconds in the following sequence: 1. The function and scan quality LEDs illuminate for one second and then flash three times. 2. Loading is displayed on the operator panel. 3. The CIS illuminates, and the scanner performs a calibration. 4. The drive motor runs. 5. The scanner CIS returns to the home position. 6. Error messages are displayed if applicable. 7. The MFP cycles down into standby mode/ready. Ready is displayed on the operator panel. If immediately following power-on, the operator panel lights are active but the MFP does not go through steps 1 and 2 above, replace the controller card assembly.

• Code: 959.02
• Description: Failure to authenticate Signature Verification Code
• Remedy: Call the next level of support to update the firmware, or replace the controller board.

• Code: 959.03
• Description: Signature Verification Code failed to authenticate a code partition.
• Remedy: Update firmware and call the next level of support, or replace the controller board

• Code: 959.04
• Description: Jump to unverified address
• Remedy: Update firmware and call the next level of support, or replace the controller board

• Code: 959.05
• Description: Unknown boot failure
• Remedy: Update firmware and call the next level of support, or replace the controller board.

• Code: 959.20...959.28
• Description: 959.20 Hardware failure 959.21 Controller did not respond to command request. 959.23 Self test failed during initialization. 959.24 EEPROM retention error 959.25 Insufficient device space during HW prog 959.26 Incremental counter reset exceeds maximum value 959.27 Increment count failed due to max value limit 959.28 Invalid SP memory configuration
• Remedy: Replace the controller board. Controller card assembly Verify +24 V dc input from the LVPS/HVPS. • Turn the MFP off. • Disconnect the LVPS/HVPS cable from the controller card at J22. See “Controller card” for more information. • Turn the MFP on. Verify +24 V dc from the cable connector of J22, pins 8 and 9. Verify that pins 7, 12, and 14 on both the cable and the card connectors are ground. • If voltage is correct, check the continuity in the cable. If the cable is good, see the “Controller card” for more information. • If grounds are not correct on the cable, first check it for continuity and then check the LVPS/HVPS. See “LVPS/HVPS service check” • If the grounds are not correct on the controller card, replace the controller card. (Check with one probe on the connector pin and the other on the ground plane of the card found at each screw head.) Note: With all cables connected, the MFP should complete POST within approximately 12–15 seconds in the following sequence: 1. The function and scan quality LEDs illuminate for one second and then flash three times. 2. Loading is displayed on the operator panel. 3. The CIS illuminates, and the scanner performs a calibration. 4. The drive motor runs. 5. The scanner CIS returns to the home position. 6. Error messages are displayed if applicable. 7. The MFP cycles down into standby mode/ready. Ready is displayed on the operator panel. If immediately following power-on, the operator panel lights are active but the MFP does not go through steps 1 and 2 above, replace the controller card assembly.

• Code: 960.xx
• Description: RAM memory error: RAM soldered on the controller board is bad
• Remedy: Replace the controller board. Controller card assembly Verify +24 V dc input from the LVPS/HVPS. • Turn the MFP off. • Disconnect the LVPS/HVPS cable from the controller card at J22. See “Controller card” for more information. • Turn the MFP on. Verify +24 V dc from the cable connector of J22, pins 8 and 9. Verify that pins 7, 12, and 14 on both the cable and the card connectors are ground. • If voltage is correct, check the continuity in the cable. If the cable is good, see the “Controller card” for more information. • If grounds are not correct on the cable, first check it for continuity and then check the LVPS/HVPS. See “LVPS/HVPS service check” • If the grounds are not correct on the controller card, replace the controller card. (Check with one probe on the connector pin and the other on the ground plane of the card found at each screw head.) Note: With all cables connected, the MFP should complete POST within approximately 12–15 seconds in the following sequence: 1. The function and scan quality LEDs illuminate for one second and then flash three times. 2. Loading is displayed on the operator panel. 3. The CIS illuminates, and the scanner performs a calibration. 4. The drive motor runs. 5. The scanner CIS returns to the home position. 6. Error messages are displayed if applicable. 7. The MFP cycles down into standby mode/ready. Ready is displayed on the operator panel. If immediately following power-on, the operator panel lights are active but the MFP does not go through steps 1 and 2 above, replace the controller card assembly.

• Code: 964.xx
• Description: Download Emulation Cyclic Redundancy Check Error: checksum failure detected in the emulation header or emulation file.
• Remedy: Disable the Download Emulation. Program the download emulation into the firmware card again. If this does not resolve the problem, then replace the firmware card and download the emulation again.