• Code: 077-300
• Description: IOT Cover Front Open Cause: Beep sounds after Front Cover remains open for 3 minutes.
• Remedy: 1 • Is the protruding portion of the FRONT COVER ASSEMBLY damaged? Replace (Front Cover Assembly (3610 / 3615)) Go to Step 2. 2 • Execute the Diag Digital Output [041- 300] to check the operation of the Front Interlock Switch. • Is it working properly? Replace (MCU PWB) Go to Step 3. 3 • Check the connection between the LVPS PWB and the MCU PWB. Is the LVPS HARNESS ASSEMBLY (P/J220P/J22) connected securely? Go to Step 4. Securely connect the LVPS HARNESS ASSEMBLY 4 • Replace the LVPS HARNESS ASSEMBLY. • Does an error occur? Go to Step 5. Troubleshooting complete. 5 • Replace the Front Interlock Switch. • Does an error occur? Replace (MCU PWB) Troubleshooting complete.

• Code: 077-304
• Description: IOT Cover Rear Open Cause: The Rear Cover is open.
• Remedy: 1 • Is the protruding portion of the REAR COVER ASSEMBLY damaged? Replace (Rear Cover Assembly) Go to Step 2. 2 • Execute the Diag Digital Output 041-301 to check the operation of the Rear Interlock Switch. • Is it working properly? Replace (MCU PWB) Go to Step 3. 3 • Check the connection between the Rear Interlock Switch and the LVPS, as well as between the LVPS PWB and the MCU PWB. • Are the Rear Interlock Switch (P/J230) and the LVPS HARNESS ASSEMBLY (P/J220P/J22) connected securely? Go to Step 4. Securely connect the Rear Interlock Switch and the LVPS HARNESS ASSEMBLY 4 • Replace the (Rear Interlock Switch Assembly). Does an error occur? Go to Step 5. Troubleshooting complete. 5 • Replace the LVPS HARNESS ASSEMBLY. • Does an error occur? Go to Step 6. Troubleshooting complete. 6 • Replace (LVPS). • Does an error occur? Replace (MCU PWB) Troubleshooting complete.

• Code: 077-312
• Description: Tray Configure Error Cause: Tray configuration error was detected. (including all of the wrong configurations)
• Remedy: 1 • Does the Tray configuration suit the specification? Go to Step 2. Change the Tray configuration related to the specification 2 • Check the connections between the OPTIONAL TRAY PWB ASSEMBLY and the MCU PWB, as well as between the OPTIONAL TRAY PWB ASSEMBLY and the LVPS PWB. • Are the OPTIONAL FEEDER HARNESS ASSEMBLY (P/J213P/J243, P/J24P/J243) and the FEEDER HARNESS ASSEMBLY DRAWER 1 (P/J243P/J419) connected securely? Go to Step 3. Securely connect the OPTIONAL FEEDER HARNESS ASSEMBLY and the FEEDER HARNESS ASSEMBLY DRAWER 1 3 • Replace the OPTIONAL FEEDER HARNESS ASSEMBLY. • Does an error occur? Go to Step 4. Troubleshooting complete. 4 • Replace the FEEDER HARNESS ASSEMBLY DRAWER 1. • Does an error occur? Go to Step 5. Troubleshooting complete. 5 • Check the connection between the OPTIONAL TRAY PWB ASSEMBLY (Upper) and the OPTIONAL TRAY PWB ASSEMBLY (Lower). Are the FEEDER HARNESS ASSEMBLY DRAWER 2 (P/J423 - P/J4231) and the FEEDER HARNESS ASSEMBLY DRAWER 1 (P/J4231 - P/J419) connected securely? Go to Step 6. Securely connect the FEEDER HARNESS ASSEMBLY DRAWER 2 and the FEEDER HARNESS ASSEMBLY DRAWER 1 6 • Replace the FEEDER HARNESS ASSEMBLY DRAWER 2. • Does an error occur? Go to Step 7. Troubleshooting complete. 7 • Replace the FEEDER HARNESS ASSEMBLY DRAWER 1. • Does an error occur? Go to Step 8. Troubleshooting complete. 8 • Replace (Optional Tray PWB Assembly) • Does an error occur? Go to Step 9. Troubleshooting complete. 9 • Replace (Feeder Assembly). • Does an error occur? Replace (MCU PWB) Troubleshooting complete.

• Code: 091-914, 091-915, 091-921, 091-963
• Description: 091-914 IOT Drum Communication Fail 091-915 Drum CRUM Data Broken Fail 091-921 IOT Drum Detached 091-963 IOT Drum CRUM ID Error Cause: 091-914: Communication failure with Drum CRUM was detected. 091-915: Malfunction of Drum CRUM was detected. 091-921: It was detected that the Drum CRUM is not at the specified position.(Loose CRUM) 091-963: The Drum CRUM ID error was detected.
• Remedy: 1 Is the DRUM CARTRIDGE installed properly, with no foreign substances at the contact point between the CRUM in the DRUM CARTRIDGE and the XEROGRAPHIC CONNECTOR ASSEMBLY? Go to Step 2. Reinstall the DRUM CARTRIDGE 2 Is the DRUM CARTRIDGE, which is installed in the device, a genuine product? Go to Step 3. Replace the DRUM CARTRIDGE with a genuine product 3 Is the connection terminal of the CRUM part in the DRUM CARTRIDGE damaged? Replace the DRUM CARTRIDGE Go to Step 4. 4 Is the connection terminal of the XEROGRAPHIC CONNECTOR ASSEMBLY damaged? Replace (Xerographic Connector Assembly) Go to Step 5. 5 • Check the connection between the XEROGRAPHIC CONNECTOR ASSEMBLY and the MCU PWB. • Is the XEROGRAPHIC CRUM HARNESS ASSEMBLY (P/J254 - P/J25) connected securely? Go to Step 6. Securely connect the XEROGRAPHIC CRUM HARNESS ASSEMBLY 6 • Replace the DRUM CARTRIDGE. • Does an error occur? Go to Step 7. Troubleshooting complete. 7 • Replace (Xerographic Connector Assembly) • Does an error occur? Go to Step 8. Troubleshooting complete. 8 • Replace the XEROGRAPHIC CRUM HARNESS ASSEMBLY. • Does an error occur? Replace (MCU PWB) Troubleshooting complete.

• Code: 091-953
• Description: Drum Tape Staying Cause: The remaining Tape of the Drum Cartridge was detected.
• Remedy: Remove the Drum Cartridge Tape.

• Code: 092-315
• Description: ATC Fail Cause: The ATC Sensor error was detected.
• Remedy: 1 Is the DRUM CARTRIDGE installed properly, with no foreign substances at the contact point between the ATC Sensor in the DRUM CARTRIDGE and the XEROGRAPHIC CONNECTOR ASSEMBLY? Go to Step 2. Reinstall the DRUM CARTRIDGE 2 Is the connection terminal of the ATC SENSOR part in the DRUM CARTRIDGE damaged? Replace the DRUM CARTRIDGE Go to Step 3. 3 Is the connection terminal of the XEROGRAPHIC CONNECTOR ASSEMBLY damaged? Replace (Xerographic Connector Assembly) Go to Step 4. 4 • Check the connection between the XEROGRAPHIC CONNECTOR ASSEMBLY and the MCU PWB. • Is the XEROGRAPHIC CRUM HARNESS ASSEMBLY(P/J254 - P/J25) connected securely? Go to Step 5. Securely connect the XEROGRAPHIC CRUM HARNESS ASSEMBLY 5 • Replace the DRUM CARTRIDGE. • Does an error occur? Go to Step 6. Troubleshooting complete. 6 • Replace (Xerographic Connector Assembly). • Does an error occur? Go to Step 7. Troubleshooting complete. 7 • Replace the XEROGRAPHIC CRUM HARNESS ASSEMBLY. • Does an error occur? Replace (MCU PWB) Troubleshooting complete.

• Code: 093-426
• Description: Toner Near Life Cause: It was detected that the Toner Cartridge needed to be replaced soon.
• Remedy: The Toner Cartridge is approaching the replacement time. Prepare a new Toner Cartridge.

• Code: 093-922
• Description: Toner Low Density Cause: Low concentration of the Toner was detected.
• Remedy: 1 • Remove the TONER CARTRIDGE, shake it a few times, and then reinstall it. • Does an error occur? Go to Step 2. Troubleshooting complete. 2 • Remove the DRUM CARTRIDGE. • Is the contact points of the DRUM CARTRIDGE clean, and correctly installed? Go to Step 3. Clean the contact points and reinstall the DRUM CARTRIDGE 3 • Replace the TONER CARTRIDGE. • Does an error occur? Go to Step 4. Troubleshooting complete. 4 • Replace the DRUM CARTRIDGE. • Does an error occur? Replace (MCU PWB) Troubleshooting complete.