• Code: 041-326
• Description: MCU PWB F3 Open RAP Fuse 3 on the MCU PWB has blown.
• Remedy: 1. Check the HVPS (PL 18.1) circuit +24 Volt IOT wirenets for overcurrent and overvoltage, and then replace the faulty parts or repair the circuits. 2. Check the Registration Clutch (PL 15.1) circuit +24 Volt IOT wirenets for overcurrent and overvoltage, and then replace the faulty parts or repair the circuits. 3. Turn the power OFF and replace the MCU PWB (PL 18.2).

• Code: 041-327
• Description: MCU PWB F4 Open RAP Fuse 4 on the MCU PWB has blown.
• Remedy: 1. Check the Fuser Fan (PL 4.1) circuit +24 Volt IOT wirenets for overcurrent and overvoltage, and then replace the faulty parts or repair the circuits. 2. Check the Exit Gate Solenoid (PL 17.4) circuit +24 Volt IOT wirenets for overcurrent and overvoltage, and then replace the faulty parts or repair the circuits. 3. Turn the power OFF and replace the MCU PWB (PL 18.2).

• Code: 041-328
• Description: MCU PWB F5 Open RAP Fuse 5 on the MCU PWB has blown.
• Remedy: 1. Check the MSI Feed Solenoid (PL 13.2) circuit +24 Volt IOT wirenets for overcurrent and overvoltage, and then replace the faulty parts or repair the circuits. 2. Check the Offset Motor (PL 17.1) circuit +24 Volt IOT wirenets for overcurrent and overvoltage, and then replace the faulty parts or repair the circuits. 3. Turn the power OFF and replace the MCU PWB (PL 18.2).

• Code: 041-329
• Description: MCU PWB F6 Open RAP Fuse 6 on the MCU PWB has blown
• Remedy: 1. Check the Tray Module PWB (PL 11.13) circuit +24 Volt IOT wirenets for overcurrent and overvoltage, and then replace the faulty parts or repair the circuits. 2. Turn the power OFF and replace the MCU PWB (PL 18.2).

• Code: 041-330
• Description: MCU PWB F7 Open RAP Fuse 7 on the MCU PWB has blown.
• Remedy: 1. Check the Finisher PWB (INT) (PL 22.7) circuit +24 Volt IOT wirenets for overcurrent and overvoltage, and then replace the faulty parts or repair the circuits. 2. Turn the power OFF and replace the MCU PWB (PL 18.2).

• Code: 041-331
• Description: MCU PWB F8 Open RAP Fuse 8 on the MCU PWB has blown.
• Remedy: CAUTION Chip fuses on the MCU PWB seldom fail because of an internal MCU problem. The cause is almost always a short circuit in the wiring or components fed by the fuse. You MUST determine the source of the short before replacing the MCU PWB. 1. Check the HCF PWB (PL 10.8) circuit +24 Volt IOT wirenets for overcurrent and overvoltage, and then replace the faulty parts or repair the circuits. 2. Turn the power OFF and replace the MCU PWB (PL 18.2).

• Code: 041-340
• Description: MCU NVM (EEPROM) Data Fail RAP The specific values of the NVM (EEPROM) data are not in their specified addresses.
• Remedy: 1. Turn the power OFF and ON. 2. Install the correct version of the IOT firmware. 3. Initialize the IOT NVM. If the problem persists, replace the MCU PWB (PL 18.2).

• Code: 042-310
• Description: Main Motor Failure RAP The Main Motor is not rotating at the specified speed.
• Remedy: Close the LH Cover and the Front Cover. Execute Component Control [042-003 Main Motor ON]. The Main Motor can be heard. Y↓N→Go to BSD 4.1 - Main Drive Control and the wires between the MCU PWB ( P/J407 and P/J408) and the Main Motor ( P205 and P204) for an open or short circuit. If OK replace the Main Motor (PL 3.2) Check the installation of the Main Drive Assembly (PL 3.1 and PL 3.2). The Main Drive Assembly is installed correctly. Y↓N→Install the Main Drive Assembly correctly. Check the wire between P/J407-9 and P205-8 for an open circuit or a short circuit (BSD 4.1 - Main Drive Control). The wires are conducting without an open circuit or a short circuit. Y↓N→Repair the open circuit or short circuit. Manually rotate the Main Motor rotor. It rotates smoothly. Y↓N→Check for foreign substances that are interfering with operation or installation failure. Foreign substances or installation failure are found. Y↓N→Replace the Main Drive Assembly (PL 3.1). Remove the foreign substances that are interfering with operation and correct the installation failure. Replace the Main Drive Assembly (PL 3.1) If the problem persists, replace the MCU PWB (PL 18.2).