• Code: 2820
• Description: Primary transfer belt motor steady-state error After motor is stabilized, the stable signal is turned OFF for continuous 2 s.
• Remedy: Primary transfer unit 1. Check that the belt can be rotated by hand, and if it is locked, check if foreign objects such as jammed paper, and if jammed, get rid of it. 2. Replace the primary transfer unit.
  Defective connector cable or poor contact in the connector 1. Reconnect the connector if its connection is loose. 2. Check continuity within the connector wire. If none, replace the wire. Primary transfer motor and Engine relay PWB (YC14) Engine relay PWB (YC1) and Main/Engine PWB (YC4)
  Drive transmission system for the Primary transfer motor 1. Check if the rollers and gears rotate smoothly. If not, clean or grease the bushes and gears. 2. Replace the gears, if damaged.
  Primary transfer motor Replace the Primary transfer motor.
  Engine relay PWB Replace the engine relay PWB.
  Main/Engine PWB Replace the Main/Engine PWB.

• Code: 4001
• Description: Polygon motor (BlacK, Magenta) startup error After the polygon motor starting, the motor stable signal is not turned ON after 6 s.
• Remedy: Polygon motor (Black, Magenta) 1. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. LSU and Main/engine PBW (YC2016) 2. If the wiring is disconnected, short-circuited or has ground fault, replace the wire. 3. Replace the LSU.
  Main/Engine PWB 1. Check the engine firmware and upgrade to the latest version if necessary. 2. Replace the Main/Engine PWB.

• Code: 4002
• Description: Polygon motor (Cyan, Yellow) startup error After the polygon motor starting, the motor stable signal is not turned ON after 6 s.
• Remedy: Polygon motor (Cyan, Yellow) 1. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. LSU and Main/engine PBW (YC2017) 2. If the wiring is disconnected, short-circuited or has ground fault, replace the wire. 3. Replace the LSU.
  Main/Engine PWB 1. Check the engine firmware and upgrade to the latest version if necessary. 2. Replace the Main/Engine PWB.

• Code: 4011
• Description: Polygon motor (BlacK, Magenta) steady error After the polygon motor stabilization, the motor stable signal is turned OFF for consecutive 6 s.
• Remedy: Polygon motor (Black, Magenta) 1. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. LSU and Main/engine PBW (YC2016) 2. If the wiring is disconnected, short-circuited or has ground fault, replace the wire. 3. Replace the LSU.
  Main/Engine PWB 1. Check the engine firmware and upgrade to the latest version if necessary. 2. Replace the Main/Engine PWB.

• Code: 4012
• Description: Polygon motor (Cyan, Yellow) steady error After the polygon motor stabilization, the motor stable signal is turned OFF for consecutive 6 s.
• Remedy: Polygon motor (Cyan, Yellow) 1. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. LSU and Main/engine PBW (YC2017) 2. If the wiring is disconnected, short-circuited or has ground fault, replace the wire. 3. Replace the LSU.
  Main/Engine PWB 1. Check the engine firmware and upgrade to the latest version if necessary. 2. Replace the Main/Engine PWB.

• Code: 4101
• Description: Laser BD (Black) error The laser can not be received for 1 s, after the Yellow laser emission starts.
• Remedy: LSU (Black, Magenta) 1. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. LSU and Main/engine PBW (YC2016) 2. If the wiring is disconnected, short-circuited or has ground fault, replace the wire. 3. Replace the LSU.
  Main/Engine PWB 1. Check both main and engine firmware, and upgrade to the latest version, if necessary. 2. Replace the Main/Engine PWB.

• Code: 4102
• Description: Laser BD (Cyan) error The laser can not be received for 1 s, after the Cyan laser emission starts.
• Remedy: LSU (Cyan, Yellow) 1. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. LSU and Main/engine PBW (YC2017) 2. If the wiring is disconnected, short-circuited or has ground fault, replace the wire. 3. Replace the LSU.
  Main/Engine PWB 1. Check both main and engine firmware, and upgrade to the latest version, if necessary. 2. Replace the Main/Engine PWB.

• Code: 4103
• Description: Laser BD (Magenta) error The laser can not be received for 1 s, after the Magenta laser emission starts.
• Remedy: LSU (Black, Magenta) 1. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. LSU and Main/engine PBW (YC2016) 2. If the wiring is disconnected, short-circuited or has ground fault, replace the wire. 3. Replace the LSU.
  Main/Engine PWB 1. Check both main and engine firmware, and upgrade to the latest version, if necessary. 2. Replace the Main/Engine PWB.