• Code: 377.215
• Description: Tray Module Communication Fault. Communication error between Tray Module PWB and MCU PWB was detected.
• Remedy: 1. Turn the power Off and On. 2. Turn the power Off and check the connection between the MD PWB P592 and the Tray Module PWB P/J541 for open circuit, short circuit, and poor contact. If no problems are found, replace the following parts in sequence: • Tray Module PWB (PL 10.9) • MD PWB • MCU PWB

• Code: 377.300
• Description: Front Cover Interlock Open. The Front Cover is open.
• Remedy: Check the following: • The Front Cover for damage or mismatch. • The Front Cover Interlock Switch for failure: dc330 Component Control [077-303] (PL 18.5) • The connection between the Front Cover Interlock Switch P/J101 and the MD PWB P/ J521 for open circuit, short circuit, and poor contact If no problems are found, replace the following parts in sequence: • MD PWB • MCU PWB

• Code: 377.301
• Description: L/H Cover Interlock Open. The L/H Cover is open.
• Remedy: Check the following: • The L/H Cover Unit for damage or mismatch • The L/H Cover Interlock Switch for failure: dc330 Component Control [077-300] (PL 14.1) • The connection between the L/H Cover Interlock Switch P/J100 and the MD PWB P/ J534 for open circuit, short circuit, and poor contact If no problems are found, replace the following parts in sequence: • MD PWB • MCU PWB

• Code: 377.305
• Description: Tray Module L/H Cover Open. The Tray Module L/H Cover is open.
• Remedy: 1. Turn the power Off and On. 2. Check the following: • The Tray Module L/H Cover for damage or mismatch • The Tray Module L/H Cover Switch for failure: dc330 Component Control [077-306] (PL 10.12) • The connection between the Tray Module L/H Cover Switch P/J104 and the Tray Module PWB P/J549 for open circuit, short circuit, and poor contact If no problems are found, replace the Tray Module PWB.

• Code: 377.307
• Description: Duplex Cover Open. The Duplex Cover is open.
• Remedy: Check the following: • The Duplex Cover for damage or mismatch. • The Duplex Cover Switch for failure: dc330 Component Control [077-305] (PL 14.5) • The connection between the Duplex Cover Switch P/J176 and the MD PWB P/J523 for open circuit, short circuit, and poor contact If no problems are found, replace the following parts in sequence: • MD PWB • MCU PWB

• Code: 377.308
• Description: L/H High Cover Open. The L/H High Cover is open.
• Remedy: Check the following: • The L/H High Cover Assembly for damage or mismatch • The L/H High Cover Switch for failure: dc330 Component Control [077-302] (PL 17.4) • The connection between the L/H High Cover Switch P/J168 and the MD PWB P/J522 for open circuit, short circuit, and poor contact If no problems are found, replace the following parts in sequence: • MD PWB • MCU PWB

• Code: 377.314
• Description: P/H Module Logic Fault. A fatal error was detected in the Tray Module.
• Remedy: 1. Turn the power Off and On. 2. Turn the power Off and check the connection between the MD PWB P/J542 and the Tray Module PWB P/J541 for open circuit, short circuit, and poor contact. If no problems are found, replace the following parts in sequence: • Tray Module PWB • MD PWB • MCU PWB

• Code: 377.320
• Description: All Feed Tray Broken. All the Feed Trays that are connected to the IOT were detected to have malfunctioned.
• Remedy: Enter dc122 Fault History. Go to the RAP of the affected Paper Tray.