• Code: C230
• Description: Large paper deck right lift motor problem When the large paper deck of the copier is closed, large paper deck level switch 1 does not turn on within 30 s of the large paper deck right lift motor turning on. During copying, large paper deck level switch 1 does not turn on within 200 ms of the large paper deck right lift motor turning on.
• Causes: Defective drive transmission system. 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.
• 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 CN9-B3 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: C231
• Description: Large paper deck left lift motor problem When the large paper deck of the copier is closed, large paper deck level switch 2 does not turn on within 30 s of the large paper deck left lift motor turning on. During copying, large paper deck level switch 2 does not turn on within 200 ms of the large paper deck left lift motor turning on.
• Causes: Poor contact in the large paper deck level switch 1 connector terminals. 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 CN9-B6 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: C242
• Description: Upper lift motor problem • When the upper cassette is inserted, the upper lift limit switch does not turn on within 4.5 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 in the upper lift motor connector terminals. Defective upper lift limit switch. Poor contact in 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, remedy or replace the cable. Check if CN8-9 on the engine PCB goes low when the upper lift limit switch is turned on. If not, replace the upper lift limit switch. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable.

• Code: C243
• Description: Lower lift motor problem • When the lower cassette is inserted, the lower lift limit switch does not turn on within 4.5 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 in the lower lift motor connector terminals. Defective lower lift limit switch. Poor contact in 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, remedy or replace the cable. Check if CN8-10 on the engine PCB goes low when the lower lift limit switch is turned on. If not, replace the lower lift limit switch. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable.

• Code: C310
• Description: Scanner carriage problem • The home position is not correct when the power is turned on or at the start of copying using the bypass table.
• Causes: Poor contact in the connector terminals. Defective scanner home position switch. Defective main PCB or scanner motor PCB. Defective scanner motor.
• Remedy: Check the connection of connector CN14 on the main PCB and the continuity across the connector terminals. Repair or replace if necessary. Replace the scanner home position switch. Replace the main PCB or scanner motor PCB and check for correct operation. Replace the scanner motor.

• Code: C400
• Description: Polygon motor synchronization problem • The polygon motor does not reach the stable speed within 15 s of the polygon motor remote signal turning on.
• Causes: Poor contact in the polygon motor connector terminals. Defective polygon motor. Defective power source PCB. Defective engine PCB.
• Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Replace the LSU. Check if 24 V DC is supplied to CN16-5 on the engine PCB. If not, replace the power source PCB. Check if 24 V DC is output from CN15-1 on the engine PCB. If not, replace the engine PCB.

• Code: C401
• Description: Polygon motor steady-state problem • The polygon motor rotation is not stable for 600 ms after the polygon motor rotation has been stabilized.
• Causes: Poor contact in the polygon motor connector terminals. Defective polygon motor. Defective power source PCB. Defective engine PCB.
• Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Replace the LSU. Check if 24 V DC is supplied to CN16-5 on the engine PCB. If not, replace the power source PCB. Check if 24 V DC is output from CN15-1 on the engine PCB. If not, replace the engine PCB.

• Code: C420
• Description: BD steady-state problem • The VTC detects a BD error for 600 ms after the polygon motor rotation has been stabilized.
• Causes: Defective laser diode. Defective polygon motor. Defective main PCB.
• Remedy: Replace the LSU. Replace the LSU. Replace the main PCB.