• Code: 341.346
• Description: MD PWB F3 Open. Fuse 3 on the MD PWB has blown.
• Remedy: 1. Check the following parts circuits for overcurrent and overvoltage, and then replace the faulty parts or repair the circuits. • Tray Module PWB (PL 10.9 Item 1) 2. Turn the power Off and replace the MD PWB.

• Code: 341.347
• Description: Serial I/O Fault.
• Remedy: 1. Turn the power Off and check the connector ( P/J452) between the MD PWB and the MCU PWB for poor connection. If no problems are found, replace the following parts in sequence: • MCU PWB • MD PWB

• Code: 341.348
• Description: MD PWB F4 Open. Fuse 4 on the MD PWB has blown.
• Remedy: 1. Check the following Tray Module PWB parts circuits for overcurrent and overvoltage, and then replace the faulty part or repair the circuits. 2. Turn the power Off and replace the MD PWB.

• Code: 341.349
• Description: MD PWB F6 Open. Fuse 6 on the MD PWB has blown.
• Remedy: 1. Check the following parts circuits for overcurrent and overvoltage, and then replace the faulty parts or repair the circuits. • Take Away Motor • Tray 2 Feed/Lift Up Motor (PL 9.4 Item 3) • P/R Latch Motor (PL 7.1 Item 4) • Agitator Motor 2. Turn the power Off and replace the MD PWB.

• Code: 341.350
• Description: MD PWB F7 Open.
• Remedy: 1. Check the following parts circuits for overcurrent and overvoltage, and then replace the faulty parts or repair the circuits. • Fuser Fan • Front LVPS Fan • IH Intake Fan • C Exit Fan • Process 1 Fan 2. Turn the power Off and replace the MD PWB.

• Code: 341.351
• Description: MD Detect Fault. The MD PWB is not installed.
• Remedy: 1. Turn the power Off and check the connector ( P/J452) between the MD PWB and the MCU PWB for poor connection. If no problems are found, replace the following parts in sequence: • MD PWB • MCU PWB

• Code: 341.352
• Description: MD PWB F5 Open. Fuse 5 on the MD PWB has blown.
• Remedy: 1. Check the Finisher circuit for overcurrent and overvoltage, and then replace the faulty parts or repair the circuits. 2. Turn the power Off and replace the MD PWB.

• Code: 341.353
• Description: MD PWB F8 Open. Fuse 8 on the MD PWB has blown.
• Remedy: 1. Check the following parts circuits for overcurrent and overvoltage, and then replace the faulty parts or repair the circuits. • Tray 1 Feed/Nudger Motor (PL 13.2 Item 6) • Exit 2 Drive Motor (PL 17.4 Item 5) • Duplex Motor 2. Turn the power Off and replace the MD PWB.