• Code: 904.06
• Description: Service transfer belt Sensor (CMY transfer roll retract HP) lag or transfer belt unit assembly missing. The sensing area of the sensor (CMY transfer roll retract HP) remains interrupted within the specified time when the CMY transfer roll is moving from the home position.
• Remedy: 1 Check the transfer belt unit assembly. Is the above component properly installed? To to step 2 Properly reinstall the transfer belt unit assembly. 2 Perform a POR. Does the error occur when the power is turned off/on? Go to step 3. Perform several print tests. If the problem remains, go to step 3. 3 Replace the transfer belt unit assembly. Go to “Transfer belt unit assembly removal”. Does the error remain? Replace the lower printer engine card assembly. Go to “Lower printer engine card assembly removal”. Problem solved.

• Code: 904.07
• Description: Service transfer belt CMY transfer roll retract motor time out The CMY transfer roll retract motor has failed.
• Remedy: 1 Perform a POR. Does the error occur when the power is turned off/on? Go to step 2. Perform several print tests. If the problem remains, go to step 2. 2 Replace the transfer belt unit assembly. Go to “Transfer belt unit assembly removal”. Does the error remain? Replace the lower printer engine card assembly. Go to “Lower printer engine card assembly removal”. Problem solved.

• Code: 905.00
• Description: Service engine error NVM read/write cannot be executed error Engine NVM read/write has failed.
• Remedy: 1 Perform a POR. Does the error occur when the power is turned off/on? Go to step 2. Perform several print tests. If the problem remains, go to step 2. 2 Turn the printer off for 60 seconds. Does the error occur when the power is turned off/on again? Replace the printer engine card assembly. Go to “Upper printer engine card assembly removal”. Go to step 3. Problem solved. 3 Perform a POR. Does the error occur when the power is turned off/on? Replace the RIP card assembly. Go to “RIP card assembly removal”. Problem solved.

• Code: 905.01
• Description: Service engine error Marking device video error Internal processing error occurred in printer engine.
• Remedy: 1 Perform a POR. Does the error occur when the power is turned off/on? Replace the upper printer engine card assembly. Go to “Upper printer engine card assembly removal”. Problem solved.

• Code: 905.02
• Description: Service engine error Marking device Xerographic error Internal processing error occurred in printer engine.
• Remedy: 1 Perform a POR. Does the error occur when the power is turned off/on? Replace the upper printer engine card assembly. Go to “Upper printer engine card assembly removal”. Problem solved.

• Code: 905.03
• Description: Service engine error Marking device other1 error Internal processing error occurred in printer engine.
• Remedy: 1 Perform a POR. Does the error occur when the power is turned off/on? Replace the upper printer engine card assembly. Go to “Upper printer engine card assembly removal”. Problem solved.

• Code: 905.04
• Description: Service engine error Marking device paper handling error Internal processing error occurred in printer engine.
• Remedy: 1 Perform a POR. Does the error occur when the power is turned off/on? Replace the upper printer engine card assembly. Go to “Upper printer engine card assembly removal”. Problem solved.

• Code: 905.05
• Description: Service engine error Marking device other2 error Internal processing error occurred in printer engine.
• Remedy: 1 Perform a POR. Does the error occur when the power is turned off/on? Replace the upper printer engine card assembly. Go to “Upper printer engine card assembly removal”. Problem solved.