• Code: E020-0000
• Description: Developing Assembly toner absent error. Toner in the Developing Assembly was empty for 2 minutes.
• Remedy: 1. Check the connection of the Developing Toner Sensor (TS1). Sensor side: J2133, J3089 (relay), PCB side: J3088 (relay), J114 (Main Driver PCB (PCB2)) 2. Check the connection of the Magnet Roller Clutch (CL5). Sensor side: J2036, J3124 (relay), J3090 (relay) PCB side: J3091(relay), J115 (Main Driver PCB (PCB2)) 3. Check the connection of the Toner Feed Motor (M28). Motor side: J2035, J3124 (relay), J3090 (relay) PCB side: J3091(relay), J115 (Main Driver PCB (PCB2)) 4. Check the connection of the Buffer Toner Sensor (TS3). Sensor side: J2039, J3124 (relay), J3090 (relay) PCB side: J3091(relay), J115 (Main Driver PCB (PCB2)) 5. Replace the Developing Toner Sensor (TS1). 6. Replace the Magnet Roller Clutch (CL5). 7. Replace the Toner Feed Motor (M28). 8. Replace the Buffer Toner Sensor (TS3). 9. Replace the Main Driver PCB (PCB2). 10. Replace the DC Controller PCB (PCB1).

• Code: E020-0001
• Description: Error in Developing Toner Sensor connection detection. The connection detection port was OFF at power-on.
• Remedy: 1. Check the connection of the Developing Toner Sensor (TS1). Sensor side: J2133, J3089 (relay), PCB side: J3088 (relay), J114 (Main Driver PCB (PCB2)) 2. Replace the Developing Toner Sensor (TS1). 3. Replace the Main Driver PCB (PCB2). 4. Replace the DC Controller PCB (PCB1).

• Code: E020-0002
• Description: Error in Buffer Toner Sensor connection detection. The connection detection port was OFF at power-on.
• Remedy: 1. Check the connection of the Buffer Toner Sensor (TS3). Sensor side: J2039, J3124 (relay), J3090 (relay) PCB side: J3091(relay), J115 (Main Driver PCB (PCB2)) 2. Replace the Buffer Toner Sensor (TS3). 3. Replace the Main Driver PCB (PCB2). 4. Replace the DC Controller PCB (PCB1).

• Code: E020-0003
• Description: Error in the Toner Excess Supply Sensor connection detection. The connection detection port was OFF at power-on.
• Remedy: 1. Check the connection of the Toner Excess Supply Sensor (TS2). Sensor side: J2038, J3124 (relay), J3090 (relay) PCB side: J3091(relay), J115 (Main Driver PCB (PCB2)) 2. Replace the Toner Excess Supply Sensor (TS2). 3. Replace the Main Driver PCB (PCB2). 4. Replace the DC Controller PCB (PCB1).

• Code: E020-0004
• Description: Error in Magnet Roller Clutch connection detection. The connection detection port was OFF at power-on.
• Remedy: 1. Check the connection of the Magnet Roller Clutch (CL5). Sensor side: J2036, J3124 (relay), J3090 (relay) PCB side: J3091(relay), J115 (Main Driver PCB (PCB2)) 2. Replace the Magnet Roller Clutch (CL5). 3. Replace the Main Driver PCB (PCB2). 4. Replace the DC Controller PCB (PCB1).

• Code: E020-0020
• Description: Error in Developing Assembly Toner Sensor Cleaning Scraper displacement. State without toner was detected continuously.
• Remedy: 1. Turn OFF the main power. 2. Replace the Developing Assembly. 3. Turn ON the main power.

• Code: E020-0021
• Description: Error in Developing Assembly Toner Sensor Cleaning Scraper displacement. State with toner was detected continuously.
• Remedy: 1. Turn OFF the main power. 2. Replace the Developing Assembly. 3. Turn ON the main power.

• Code: E023-0001
• Description: Developing Motor error. Lock error of the Developing Motor (M2).
• Remedy: 1. Check the connection of the Connector. Motor side: J2319, Main Driver PCB (PCB2) side: J109 2. Check the voltage of the Developing Motor (M2) J2152. If voltage is 0V, check the connection of the Relay PCB J520. 3. Check the load of the Developing Motor (M2). Manually turn the Developing Motor (M2) located at the rear of the host machine to check it. 4. Replace the Developing Motor (M2). 5. Replace the Developing Clutch (CL1). (When an error occurs while the Developing Clutch is ON.) 6. Replace the Main Driver PCB (PCB2). 7. Replace the DC Controller PCB (PCB1).