• Code: C0440
• Description: Optional document finisher/built-in finisher communication problem The engine PWB and the document finisher or the built-in finisher are unable to communicate with each other.
• Causes: Poor contact in the connector terminals. Defective PWB
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC5 on the engine PWB and the connector of the document finisher, and the continuity across the connector terminals. Repair or replace if necessary. Check the connection of connector YC4 on the engine PWB and the connector of the built-in finisher, and the continuity across the connector terminals. Repair or replace if necessary. Defective PWB. Replace the engine PWB or finisher main PWB and check for correct operation.

• Code: C0640
• Description: Hard disk drive problem The hard disk cannot be accessed.
• Causes: Poor contact in the connector terminals. Defective hard disk. Defective main PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC8 on the main PWB and the connector on the hard disk. Repair or replace if necessary. Defective hard disk. Run U024 (HDD formatting) without turning the power off to initialize the hard disk. Replace the hard disk drive and check for correct operation if the problem is still detected after initialization. Defective main PWB. Replace the main PWB and check for correct operation.

• Code: C0700
• Description: Memory card error for backup Optional fax backup kit (memory card) is not suitable as backup.
• Causes: Memory card installed incorrectly. Defective memory card.
• Remedy: Memory card installed incorrectly. Install memory card correctly. Defective memory card. Run the maintenance item U933 to initialize the memory card (see page 1-3-79).

• Code: C0800
• Description: Image processing problem JAM05 is detected twice.
• Causes: Defective main PWB.
• Remedy: Defective main PWB. Replace the main PWB and check for correct operation.

• Code: C0960
• Description: Developing unit EEPROM error Reading from or writing to EEPROM cannot be performed.
• Causes: Poor contact in the connector terminals. Defective developing unit.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the engine PWB and the continuity across the connector terminals. Repair or replace if necessary. Defective developing unit. Replace the developing unit.

• Code: C1010
• Description: Upper lift motor error When cassette 1 is inserted, upper lift limit switch does not turn on within 12 s of upper lift motor turning on.
• Causes: Poor contact in the connector terminals. Broken gears or couplings of upper lift motor. Defective upper lift motor. Defective upper lift limit switch. Poor contact in the connector terminals. Defective engine PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector of upper lift motor and the connector YC23 on the engine PWB, and the continuity across the connector terminals. Repair or replace if necessary. Broken gears or couplings of upper lift motor. Replace upper lift motor. Defective upper lift motor. Check for continuity across the coil. If none, replace upper lift motor. Defective upper lift limit switch. Check if YC23-B9 on the engine PWB goes low when upper lift limit switch is turned off. If not, replace upper lift limit switch. Poor contact in the connector terminals. Check the connection of connector of upper lift limit switch and the connector YC23 on the engine PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: C1020
• Description: Lower lift motor error When cassette 2 is inserted, lower lift limit switch does not turn on within 12 s of lower lift motor turning on.
• Causes: Poor contact in the connector terminals. Broken gears or couplings of lower lift motor. Defective lower lift motor. Defective lower lift limit switch. Poor contact in the connector terminals. Defective engine PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector of lower lift motor and the connector YC23 on the engine PWB, and the continuity across the connector terminals. Repair or replace if necessary. Broken gears or couplings of lower lift motor. Replace lower lift motor. Defective lower lift motor. Check for continuity across the coil. If none, replace lower lift motor. Defective lower lift limit switch. Check if YC23-A2 on the engine PWB goes low when lower lift limit switch is turned off. If not, replace lower lift limit switch. Poor contact in the connector terminals. Check the connection of connector of lower lift limit switch and the connector YC23 on the engine PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: C1030
• Description: Paper feeder lift motor 1 error (optional paper feeder) When optional cassette 3 is inserted, paper feeder lift switch 1 does not turn on within 12 s of paper feeder lift motor 1 turning on.
• Causes: Poor contact in the connector terminals. Broken gears or couplings of paper feeder lift motor 1. Defective paper feeder lift motor 1. Defective paper feeder lift switch 1.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC22 on the engine PWB and the connector on the paper feeder main PWB, and the continuity across the connector terminals. Repair or replace if necessary. Broken gears or couplings of paper feeder lift motor 1. Replace paper feeder lift motor 1. Defective paper feeder lift motor 1. Check for continuity across the coil. If none, replace paper feeder lift motor 1. Defective paper feeder lift switch 1. Check if YC1-5 on the paper feeder main PWB goes low when paper feeder lift switch 1 is turned off. If not, replace paper feeder lift switch 1.