• Code: 073 410
• Description: Tray 3 Cassette Chute Kit Warning The Tray 3 CHUTE RETARD CST needs to be replaced soon. (The number of printed sheets from Tray 3 had exceeded the specified number.)
• Causes: CHUTE RETARD CST (PL2.2.15 / PL2.5.15) MCU PWB (PL11.1.3)
• Remedy: 1 Check after the replacement of Tray 3 CHUTE RETARD CST Replace the CHUTE RETARD CST with a new one. Enter the CE mode and execute the following menus to clear the CHUTE RETARD CST life counter. Parameter / Life Counter / Tray 3 Chute / Reset Counter Does an error occur? Replace the MCU PWB Procedure is complete

• Code: 074 401
• Description: Tray 4 Cassette Roll Assy Kit Warning The Tray 4 KIT ROLL ASSY FEED needs to be replaced soon. (The number of printed sheets from Tray 4 had exceeded the specified number.)
• Causes: KIT ROLL ASSY FEED (PL15.3.99) MCU PWB (PL11.1.3)
• Remedy: 1 Check after the replacement of Tray 4 KIT ROLL ASSY FEED Replace the KIT ROLL ASSY FEED with a new one. Enter the CE mode and execute the following menus to clear the KIT ROLL ASSY FEED life counter. Parameter / Life Counter / Tray 4 Roll / Reset Counter Does an error occur? Replace the MCU PWB Procedure is complete

• Code: 074 410
• Description: Tray 4 Cassette Chute Kit Warning The Tray 4 CHUTE RETARD CST needs to be replaced soon. (The number of printed sheets from Tray 4 had exceeded the specified number.)
• Causes: CHUTE RETARD CST (PL2.5.15) MCU PWB (PL11.1.3)
• Remedy: 1 Check after the replacement of Tray 4 CHUTE RETARD CST Replace the CHUTE RETARD CST with a new one. Enter the CE mode and execute the following menus to clear the CHUTE RETARD CST life counter. Parameter / Life Counter / Tray 4 Chute / Reset Counter Does an error occur? Replace the MCU PWB Procedure is complete

• Code: 075 401
• Description: MSI Roll Assy Kit Warning The KIT ROLL MSI needs to be replaced soon. (The number of printed sheets from the MSI had exceeded the specified number.)
• Causes: KIT ROLL MSI (PL3.1.20) MCU PWB (PL11.1.3)
• Remedy: 1 Check after the replacement of KIT ROLL MSI Replace the KIT ROLL MSI with a new one. Enter the CE mode and execute the following menus to clear the KIT ROLL MSI life counter. Parameter / Life Counter / Bypass Tray Roll / Reset Counter Does an error occur? Replace the MCU PWB Procedure is complete

• Code: 077 215
• Description: IOT Option Feeder Communication Error A communication error occurred between the MCU PWB and the 550 Paper Feeder (optional), or within the 550 Paper Feeder (between Tray 2 and Tray 3, Tray 3 and Tray 4).
• Causes: HARNESS ASSY FEEDER 1 (PL2.3.10) HARNESS ASSY FEEDER 2 (PL15.2.20) HARNESS ASSY FEEDER 3 (PL15.2.19) FDR PWB (PL15.2.18) MCU PWB (PL11.1.3)
• Remedy: 1 Check the connection of the FDR PWB Check the connections between FDR PWB and MCU PWB, as well as between FDR PWB and FDR PWB. Are P/J24, P/J2481, P/J81, P/J86, and P/J8610 connected securely? Go to Step 2 Connect P/J24, P/J2481, P/J81, P/J86, and P/J8610 securely 2 Check the conductivity of the HARNESS ASSY FEEDER 1 Is the wire between P/J24 <=> P/J2481 conducting properly? Go to Step 3 Replace the HARNESS ASSY FEEDER 1 3 Check the conductivity of the HARNESS ASSY FEEDER 2 Is the wire between P/J2481 <=> P/J81 conducting properly? Go to Step 4 Replace the HARNESS ASSY FEEDER 2 4 Check the conductivity of the HARNESS ASSY FEEDER 3 Is the wire between P/J86 <=> P/J8610 conducting properly? Go to Step 5 Replace the HARNESS ASSY FEEDER 3 5 Check after the replacement of FDR PWB Replace the FDR PWB. Does an error occur? Replace the MCU PWB Procedure is complete

• Code: 077 216
• Description: IOT Option Duplex Communication Error A communication error occurred between the MCU PWB and the Duplex Unit (optional).
• Causes: Harness Assy Front [KIT FRAME FRONT] (PL4.1.1) HARNESS ASSY DUP (PL13.2.22) DUP PWB (PL13.2.21) MCU PWB (PL11.1.3)
• Remedy: 1 Check the connection of the DUP PWB Check the connection between DUP PWB and MCU PWB. Are P/J23, P/J2371, and P/J71D connected securely? Go to Step 2 Connect P/J23, P/J2371, and P/J71D securely 2 Check the conductivity of the Harness Assy Front Is the wire between P/J23 <=> P/J2371 conducting properly? Go to Step 3 Replace the Harness Assy Front 3 Check the conductivity of the HARNESS ASSY DUP Is the wire between P/J2371 <=> P/J71D conducting properly? Go to Step 4 Replace the HARNESS ASSY DUP 4 Check after the replacement of DUP PWB Replace the DUP PWB. Does an error occur? Replace the MCU PWB Procedure is complete

• Code: 077 401
• Description: Regi Unit Warning The KIT REGIST needs to be replaced soon. (The number of printed sheets had exceeded the specified number
• Causes: KIT REGIST (PL5.1.1) MCU PWB (PL11.1.3)
• Remedy: 1 Check after the replacement of KIT REGIST Replace the KIT REGIST with a new one. Enter the CE mode and execute the following menus to clear the KIT REGIST life counter. Parameter / Life Counter / ROS / Regist / Drive / Reset Counter Does an error occur? Replace the MCU PWB Procedure is complete

• Code: 094 422
• Description: Trans Assy Life Warning The BTR needs to be replaced soon. (The number of printed sheets had exceeded the specified number.
• Causes: BTR (PL4.1.3) MCU PWB (PL11.1.3)
• Remedy: 1 Check after the replacement of BTR Replace the BTR with a new one. Enter the CE mode and execute the following menus to clear the BTR life counter. Parameter / Life Counter / Fuser / Trans / Reset Counter Does an error occur? Replace the MCU PWB Procedure is complete