• Code: 88
• Description: Toner cartridge low
• Remedy: Replace the imaging unit.

• Code: 900.xx
• Description: RIP firmware errors
• Remedy: POR the machine. If the error re.occurs, then update the firmware. If the error continues occurring, then replace the controller board.

• Code: 912.xx
• Description: Unrecoverable Engine firmware error
• Remedy:

• Code: 940.xx
• Description: RIP to engine communication failure—the zero crossing signal used for fuser control in the low voltage (LV) power supply has failed, or the wrong low voltage power supply has been installed.
• Remedy: Step 1 Reset the machine. Does the error remain? Replace the LVPS. See “LVPS removal”. Go to step 2. Problem resolved.
  Step 2 Reset the machine. Does the error remain? Replace the controller board. See “Controller board removal”. Problem resolved.

• Code: 948.xx
• Description: Failed engine card—pel clock check failed.
• Remedy: Replace the controller board.

• Code: 949.xx
• Description: Failed engine card—delay line calibration failure.
• Remedy: Replace the controller board.

• Code: 950.xx
• Description: NVRAM mismatch failure—mismatch between controller board EEPROM and control panel mirror. ".xx" codes: • 00-29— mismatch between system and mirror • 30-60—mismatch between secure and system
• Remedy: Warning—Potential Damage: When replacing any of the following components: • Control panel assembly • Controller board assembly Replace only one component at a time. Replace the required component and perform a POR before replacing a second component listed above. If this procedure is not followed, the printer will be rendered inoperable. Never replace two or more of the components listed above without a POR after installing each one or the printer will be rendered inoperable. Never install and remove components listed above as a method of troubleshooting components. Once a component has been installed in a machine, it can not be used in another machine. It must be returned to the manufacturer.
  Step 1 Check the control panel assembly. Was the control panel assembly recently replaced? Go to step 3. Go to step 2.
  Step 2 Check the controller board assembly. Was the controller board assembly recently replaced? Go to step 4. Contact next level of support.
  Step 3 Replace the current control panel assembly with the control panel assembly. See“Control panel removals”. Does the error remain? Go to step 5. The problem is solved.
  Step 4 Replace the current controller board assembly with the original controller board assembly. See “Controller board removal”. Does the problem continue? Go to step 6. The problem is solved.
  Step 5 Replace the original control panel assembly with a new and not previously installed control panel assembly. Does the error continue? Contact the next level of support. The problem is solved.
  Step 6 Replace the original control panel assembly with a new and not previously installed control panel door assembly. Does the error continue? Contact the next level of support. The problem is solved.

• Code: 952.xx
• Description: A recoverable NVRAM Cyclic Redundancy Check (CRC) error occurred—n is the offset at which the error occurred.
• Remedy: POR the printer.