• Code: 2102
• Description: Color developers drive motor lock
  • The FG (Frequency generation) pulse which the color developers drive motor generates is not entered at the correct frequency in CPU (U2) on the engine controller PWB (KP-992) during normal operation (after selfdiagnostics codes 2112 and 2122 are cleared).
• Causes: Defective engine controller PWB (KP-992). Defective color developers drive motor. Excessive torque for driving color developers. (Overloaded by a damaged gear.) Defective harness (2CK2710) between engine controller PWB (KP-992) and color developers drive motor, or poor contact of the connector terminals.
• Remedy: Replace the engine controller PWB (KP- 992). Replace the color developers drive motor. Check if the yellow, magenta, and cyan developers rotate smoothly. Check for broken gears. Replace if any. Check the continuity of the harness (2CK2710). Check the insertion of connectors.

• Code: 2111
• Description: Black developer drive motor starting error
  • No FG (Frequency generation) pulse is entered when ASIC (U7) on the engine controller PWB (KP-992) has issued a motor activation signal to the black developer drive motor.
• Causes: Defective engine controller PWB (KP-992). Defective black developer drive motor. Excessive torque for driving black developer. (Overloaded by a damaged gear.) Defective harness (2CK2711) between engine controller PWB (KP-992) and main drive motor, or poor contact of the connector terminals.
• Remedy: Replace the engine controller PWB (KP- 992). Replace the black developer drive motor. Check if the black developer rotates smoothly. Check for broken gears. Replace if any. Check the continuity of the harness (2CK2711). Check the insertion of connectors.

• Code: 2112
• Description: Color developers drive motor starting error
  • No FG (Frequency generation) pulse is entered when ASIC (U7) on the engine controller PWB (KP-992) has issued a motor activation signal to the drive motor for the color developers.
• Causes: Defective engine controller PWB (KP-992). Defective color developers drive motor. Excessive torque for driving color developers. (Overloaded by a damaged gear.) Defective harness (2CK2710) between engine controller PWB (KP-992) and color developers drive motor, or poor contact of the connector terminals.
• Remedy: Replace the engine controller PWB (KP- 992). Replace the color developers drive motor. Check if the yellow, magenta, and cyan developers rotate smoothly. Check for broken gears. Replace if any. Check the continuity of the harness (2CK2710). Check the insertion of connectors.

• Code: 2121
• Description: Black developer drive motor starting time-out
  • The FG (Frequency generation) pulse does not reach the correct frequency when ASIC (U7) on the engine controller PWB (KP-992) has issued a motor activation signal to the black developer drive motor.
• Causes: Defective engine controller PWB (KP-992). Defective black developer drive motor. Excessive torque for driving black developer. (Overloaded by a damaged gear.) Defective harness (2CK2711) between engine controller PWB (KP-992) and black developer, or poor contact of the connector terminals.
• Remedy: Replace the engine controller PWB (KP- 992). Replace the black developer drive motor. Check if the black developer rotates smoothly. Check for broken gears. Replace if any. Check the continuity of the harness (2CK2711). Check the insertion of connectors.

• Code: 2122
• Description: Color developers drive motor starting time-out
  • The FG (Frequency generation) pulse does not reach the correct frequency when ASIC (U8) on the engine controller PWB (KP-992) has issued a motor activation signal to the drive motor that drives the color developers.
• Causes: Defective engine controller PWB (KP-992). Defective color developers drive motor. Excessive torque for driving color developers. (Overloaded by a damaged gear.) Defective harness (2CK2710) between engine controller PWB (KP-992) and color developers, or poor contact of the connector terminals.
• Remedy: Replace the engine controller PWB (KP- 992). Replace the color developers drive motor. Check if the yellow, magenta, and cyan developers rotate smoothly. Check for broken gears. Replace if any. Check the continuity of the harness (2CK2710). Check the insertion of connectors.

• Code: 2320
• Description: Fuser drive motor error
  • The fuser control system does not operate normally.
• Causes: Defective engine controller PWB (KP-992).
• Remedy: Replace the engine controller PWB (KP- 992).

• Code: 2340
• Description: Fuser drive motor driving clock table error
  • An error has occurred in the driving clock table on the engine controller PWB (KP-992) that controls the fuser drive motor (a stepping motor).
• Causes: Defective engine controller PWB (KP-992).
• Remedy: Replace the engine controller PWB (KP- 992).

• Code: 2500
• 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 (U2) on the engine controller PWB (KP-992) during normal operation.
• Causes: Defective engine controller PWB (KP-992). Defective paper feed motor. Excessive torque for driving paper feed unit. (Overloaded by a damaged gear.) Defective harness (2CK2707) between engine controller PWB (KP-992) and paper feed motor, or poor contact of the connector terminals.
• Remedy: Replace the engine controller PWB (KP- 992). 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 (2CK2707). Check the insertion of connectors.