• Code: 1820
• Description: Communication error with the paper feeder (2nd PF) No paper feeder was detected after the paper feeder connection was detected at power-up
• Remedy: Paper feeder Check the wiring connection status with the main unit, and if necessary, reconnect it.
  PF main PWB 1. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. PF main PWB and Main/engine PWB (YC47) 2. If the wiring is disconnected, shortcircuited or has a ground fault, replace the wire. 3. Replace the PF main PWB.
  Main/ Engine PWB 1. Check the engine firmware and upgrade to the latest version if necessary. 2. Replace the main/engine PWB.

• Code: 2000
• Description: Main motor steady-state error After the main motor was stabilized, the ready signal was not detected for consecutive 1s.
• Remedy: Wire and connector between the main motor and main/engine PWB (YC9) If the connector is not inserted enough, reinsert it. Or check the wire's continuity, and repair or replace the wire if there is no continuity.
  Main motor drive transmission system Check if each roller and gear rotate smoothly. Apply grease to the bushings and gears if they are faulty. Check each gear if it is damaged and replace it if there is damage.
  Main motor Replace the main motor.
  Main/Engine PWB Replace the main/engine PWB.

• Code: 2010
• Description: Main motor start-up error The ready signal was not detected when passing 2s after the main motor is started up.
• Remedy: Wire and connector between the main motor and main/engine PWB (YC9) If the connector is not inserted enough, reinsert it. Or check the wire's continuity, and repair or replace the wire if there is no continuity.
  Main motor drive transmission system Check if each roller and gear rotate smoothly. Apply grease to the bushings and gears if they are faulty. Check each gear if it is damaged and replace it if there is damage.
  Main motor Replace the main motor.
  Main/Engine PWB Replace the main/engine PWB.

• Code: 2600
• Description: PF conveying motor error (Paper feeder) The ready signal is not detected within 2s after the PF conveying motor of the cassette 2 turns on.
• Remedy: Connection of the wire and connector PF conveying motor - PF main PWB If the connecor is not inserted enough, reinsert it. Or check the wire's continuity, and repair or replace the wire if there is no continuity.
  PF conveying motor drive transmission system Check if each roller and gear rotate smoothly. Apply grease to the bushings and gears if they are faulty. Check each gear if it is damaged and replace it if there is damage.
  PF conveying motor Replace the PF conveying motor.

• Code: 2610
• Description: PF conveying motor error (Paper feeder) The ready signal is not detected within 2s after the PF conveying motor of the cassette 3 turns on.
• Remedy: Connection of the wire and connector PF conveying motor - PF main PWB If the connector is not inserted enough, reinsert it. Or check the wire's continuity, and repair or replace the wire if there is no continuity.
  PF conveying motor drive transmission system Check if each roller and gear rotate smoothly. Apply grease to the bushings and gears if they are faulty. Check each gear if it is damaged and replace it if there is damage.
  PF conveying motor Replace the PF conveying motor.

• Code: 4000
• Description: Polygon motor initial error (LSU) The polygon motor ready signal is not detected when passing 10s after starting up the polygon motor
• Remedy: Laser scanner unit (LSU) 1. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. Polygon motor - Main/engine PWB (YC3) If the wiring is disconnected, short-circuited or has a ground fault, replace the wire. 2. 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: 4010
• Description: Polygon motor steady-state error (LSU) The polygon motor ready signal is not for consecutive 1s after the polygon motor is stabilized
• Remedy: Laser scanner unit (LSU) 1. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. Polygon motor - Main/engine PWB (YC3) If the wiring is disconnected, short-circuited or has a ground fault, replace the wire. 2. 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: 4201
• Description: BD steady-state error (LSU) BD was not obtained during the steady rotation
• Remedy: Laser scanner unit (LSU) 1. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. LSU - Main/Engine PWB (YC505) 2. If the wiring is disconnected, shortcircuited or has a ground fault, replace the wire. 3. Replace the LSU.
  Main/Engine PWB Replace the main/engine PWB.