• Code: C0630
• Description: DMA problem • DMA transmission of compressed, decompressed, rotated, relocated or blanked-out image data does not complete within the specified period of time.
• Causes: Defective main PCB.
• Remedy: Replace the main PCB and check for correct operation.

• Code: C0640
• Description: Hard disk drive problem • The hard disk drive cannot be accessed.
• Causes: Poor contact of the hard disk drive connector terminals. Defective hard disk drive. Defective main PCB.
• Remedy: Check the connection of connectors CN2 on the main PCB and hard disk drive, and the continuity across the connector terminals. Repair or replace if necessary. Run U906 (Resetting partial operation control) to cancel partial operation control. 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. Replace the main PCB and check for correct operation.

• Code: C1030
• Description: Upper lift motor problem • When the upper cassette is inserted, the upper lift limit switch does not turn on within 9 s of the upper lift motor turning on. • During copying, the upper lift limit switch does not turn on within 200 ms of the upper lift motor turning on.
• Causes: Broken gears or couplings of the upper lift motor. Defective upper lift motor. Poor contact of the upper lift motor connector terminals. Defective upper lift limit switch. Poor contact of the upper lift limit switch connector terminals.
• Remedy: Replace the upper lift motor. Check for continuity across the coil. If none, replace the upper lift motor. Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable. Check if CN 2-6 on the engine PCB goes low when the upper lift limit switch is turned off. If not, replace the upper lift limit switch. Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable.

• Code: C1040
• Description: Lower lift motor problem • When the lower cassette is inserted, the lower lift limit switch does not turn on within 9 s of the lower lift motor turning on. • During copying, the lower lift limit switch does not turn on within 200 ms of the lower lift motor turning on.
• Causes: Broken gears or couplings of the lower lift motor. Defective lower lift motor. Poor contact of the lower lift motor connector terminals. Defective lower lift limit switch. Poor contact of the lower lift limit switch connector terminals.
• Remedy: Replace the lower lift motor. Check for continuity across the coil. If none, replace the lower lift motor. Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable. Check if CN2-14 on the engine PCB goes low when the lower lift limit switch is turned off. If not, replace the lower lift limit switch. Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable.

• Code: C1050
• Description: Large paper deck right lift motor problem • When the large paper deck is inserted, the large paper deck level switch 1 does not turn on within 30 s of the deck right lift motor turning on. • During copying, the large paper deck level switch 1 does not turn on within 200 ms of the deck right lift motor turning on.
• Causes: Broken gear or coupling of the large paper deck right lift motor. Defective large paper deck right lift motor. Poor contact in the large paper deck right lift motor connector terminals. Defective large paper deck level switch 1. Poor contact in the large paper deck level switch 1 connector terminals.
• Remedy: Replace the large paper deck right lift motor. Check for continuity across the coil. If none, replace the large paper deck right lift motor. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Check if CN13-A9 on the engine PCB goes low when large paper deck level switch 1 is turned on. If not, replace large paper deck level switch 1. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable.

• Code: C1060
• Description: Large paper deck left lift motor problem • When the large paper deck is inserted, the large paper deck level switch 2 does not turn on within 30 s of the deck left lift motor turning on. • During copying, the large paper deck level switch 2 does not turn on within 200 ms of the deck left lift motor turning on.
• Causes: Broken gear or coupling of the large paper deck left lift motor. Defective large paper deck left lift motor. Poor contact in the large paper deck left lift motor connector terminals. Defective large paper deck level switch 2. Poor contact in the large paper deck level switch 2 connector terminals.
• Remedy: Replace the large paper deck left lift motor. Check for continuity across the coil. If none, replace the large paper deck left lift motor. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Check if CN13-A8 on the engine PCB goes low when large paper deck level switch 2 is turned on. If not, replace large paper deck level switch 2. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable.

• Code: C1140
• Description: Side deck lift motor (going up) problem • When the side deck’s right cover is closed, the upper limit detection switch does not turn on within 17 s of the side deck lift motor turning on. • When the upper limit detection switch detects edge of turning off signal, the upper limit detection switch does not turn on within 200 ms of the side deck lift motor turning on.
• Causes: Poor contact in the upper limit detection switch connector terminals. Defective upper limit detection switch. Defective side deck main PCB.
• Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Replace the upper limit detection switch. Replace the side deck main PCB.

• Code: C1150
• Description: Side deck lift motor (going down) problem • When the side deck’s right cover is closed, the lower limit detection switch does not turn on within 17 s of the side deck lift motor turning on. • When the lower limit detection switch detects edge of turning off signal, the lower limit detection switch does not turn on within 200 ms of the side deck lift motor turning on.
• Causes: Poor contact in the lower limit detection switch connector terminals. Defective lower limit detection switch. Defective side deck main PCB.
• Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Replace the lower limit detection switch. Replace the side deck main PCB.