• Code: C2500
• Description: Paper feed motor lock • The FG (Frequency generation) pulse which the paper feed motor generates is not entered at the correct frequency in ASIC (U8) on the engine controller PCB during normal operation.
• Causes: Defective engine controller PCB. Defective paper feed motor. Excessive torque for driving paper feed unit. (Overloaded by a damaged gear.) Defective harness between engine controller PCB and paper feed motor, or poor contact of the connector terminals.
• Remedy: Replace the engine controller PCB and check for correct operation. Replace the paper feed motor. Check if the paper feed unit rotates smoothly. Check for broken gears. Replace if any. Check the continuity of the harness and the insertion of connectors.

• Code: C2510
• Description: Paper feed motor starting error • No FG (Frequency generation) pulse is entered within the predetermined period when ASIC (U8) on the engine controller PCB has issued a motor activation signal to the paper feed motor.
• Causes: Defective engine controller PCB. Defective paper feed motor. Excessive torque for driving paper feed unit. (Overloaded by a damaged gear.) Defective harness between engine controller PCB and paper feed motor, or poor contact of the connector terminals.
• Remedy: Replace the engine controller PCB and check for correct operation. Replace the paper feed motor. Check if the paper feed unit rotates smoothly. Check for broken gears. Replace if any. Check the continuity of the harness and the insertion of connectors.

• Code: C2520
• Description: Paper feed motor starting time-out • The FG (Frequency generation) pulse does not reach the correct frequency within the predetermined period when ASIC (U8) on the engine controller PCB has issued a motor activation signal to the paper feed motor.
• Causes: Defective engine controller PCB. Defective paper feed motor. Excessive torque for driving paper feed unit. (Overloaded by a damaged gear.) Defective harness between engine controller PCB and main paper feed, or poor contact of the connector terminals.
• Remedy: Replace the engine controller PCB and check for correct operation. Replace the paper feed motor. Check if the paper feed unit rotates smoothly. Check for broken gears. Replace if any. Check the continuity of the harness and the insertion of connectors.

• Code: C3100
• 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: Defective scanner main PCB. Defective scanner home position switch. Defective scanner motor. Poor contact in the connector terminals.
• Remedy: Replace the scanner main PCB and check for correct operation. Replace the scanner home position switch. Replace the scanner motor. Check the connection of connector CN40 on the scanner main PCB and the continuity across the connector terminals. Repair or replace if necessary.

• Code: C3200
• Description: Exposure lamp problem • Check the CCD input value for the lighting status of the exposure lamp 100 ms after the exposure lamp is lit and the carriage is moved to the shading position. If the exposure lamp does not light, turn off the lamp. After 500 ms, light the lamp again and, a further 500 ms later, check the CCD input. The exposure lamp does not light after 5 retries.
• Causes: Defective scanner main PCB. Defective exposure lamp or inverter PCB. Incorrect shading position. Poor contact of the connector terminals.
• Remedy: Replace the scanner main PCB and check for correct operation. Replace the exposure lamp or inverter PCB. Adjust the position of the contact glass (shading plate). If the problem still occurs, replace the scanner home position switch. Check the connection of connector CN40 on the scanner main PCB, and the continuity across the connector terminals. Repair or replace if necessary.

• Code: C4000
• Description: Polygon motor error • The READY signal is not entered within the predetermined period when CPU (U2) on the engine controller PCB has issued a motor activation signal to the laser scanner unit.
• Causes: Defective engine controller PCB. Defective laser scanner unit (PD PCB). Defective harness between engine controller PCB and laser scanner unit, or poor contact of the connector terminals.
• Remedy: Replace the engine controller PCB and check for correct operation. Replace the laser scanner unit. Check the continuity of the harness and the insertion of connectors.

• Code: C4200
• Description: Horizontal synchronized signal (PD) detection error • The horizontal synchronization signal (PD) is not entered by the laser scanner unit when ASIC (U7) on the engine controller PCB has issued a laser activation signal.
• Causes: Defective engine controller PCB. Defective laser scanner unit (PD PCB). Defective harness between engine controller PCB and laser scanner unit, or poor contact of the connector terminals.
• Remedy: Replace the engine controller PCB and check for correct operation. Replace the laser scanner unit. Check the continuity of the harness and the insertion of connectors.

• Code: C5120
• Description: Abnormal separation charger high voltage leak current • ASIC (U8) on the engine controller PCB has detected a excessive leakage current in the separation charger high voltage supply.
• Causes: Defective engine controller PCB. Defective separation charger high voltage unit. Defective harness between engine controller PCB and separation charger high voltage unit, or poor contact of the connector terminals.
• Remedy: Replace the engine controller PCB and check for correct operation. Replace the separation charger high voltage unit. Check the continuity of the harness and the insertion of connectors.