• Code: 231-03
• Description: FGATE OFF error: Ma. FGATE signal is not OFF even when the laser is ready to end. This SC is detected when the machine is copying.
• Causes: • Connection error between BiCU and Controller • BiCU failure (Damaged laser ASIC)
• Remedy: 1. Cycle the power off/on. 2. Check the connection between IPU and Controller. 3. Replace the BiCU.

• Code: 231-04
• Description: FGATE OFF error: Ye. FGATE signal is not OFF even when the laser is ready to end. This SC is detected when the machine is copying.
• Causes: • Connection error between BiCU and Controller • BiCU failure (Damaged laser ASIC)
• Remedy: 1. Cycle the power off/on. 2. Check the connection between IPU and Controller. 3. Replace the BiCU.

• Code: 240-01
• Description: • The LD current is more than the prescribed current during emitting light. • LD driver cannot be initialized correctly. • Disconnected LDB harness. This SC is detected when: • The machine starts up. • The machine is copying.
• Causes: • LDB harness connection error • Deteriorated LD (LD broken) • LDB (LD driver) failure • LDB harness failure
• Remedy: 1. Cycle the power off/on. 2. Check the harness between LDB and IPU. 3. Replace the LD unit. 4. Replace the harness between LDB and BiCU.

• Code: 240-03
• Description: • The LD current is more than the prescribed current during emitting light. • LD driver cannot be initialized correctly. • Disconnected LDB harness. This SC is detected when: • The machine starts up. • The machine is copying.
• Causes: • LDB harness connection error • Deteriorated LD (LD broken) • LDB (LD driver) failure • LDB harness failure
• Remedy: 1. Cycle the power off/on. 2. Check the harness between LDB and IPU. 3. Replace the LD unit. 4. Replace the harness between LDB and BiCU.

• Code: 272-10
• Description: LD driver communication error Power source for LD driver is incorrect. This SC is detected when: • The machine starts up. • The machine returns from energy saver mode. • Covers are closed.
• Causes: • BiCU failure (LD5V Power error) • LDB failure (LD drive error) • LDB harness failure • Interlock switch failure
• Remedy: 1. Cycle the power off/on. 2. Check the harness between LDB and BiCU. 3. Replace the BiCU. 4. Replace the LD unit. 5. Replace the harness between LDB and BiCU. 6. Replace the interlock switch.

• Code: 312-01
• Description: Charge roller feed back voltage error: Bk. The feedback voltage of the charge AC for each color is 0.3V or less for consecutive 200ms after the charge AC is activated in the standard or half line speed.
• Causes: • Disconnected/incorrect harness for the power pack • Damaged/incorrect PCU • Power pack failure • Disconnected harness/connector
• Remedy: 1. Check the drum condition: Check the terminal to see if there is dust, damage, or deformation. Check the continuity as well. If not good, replace the PCDU. If the SC reoccurs, go to the next step. 2. Check all the related connectors are firmly connected: If not good, reconnect the connector. Check if the SC reoccurs by cycling the power off/on. If the SC reoccurs, go to the next step. 3. Check the mainframe condition: Check if there is dust on the terminal for charging, or any damage/ deformation. Check the continuity between the power packs and charging terminal. If the SC reoccurs, go to the next step. 4. Check the Power pack: Try installing a new power pack to determine whether the power pack is the cause. If the SC does not occur with the new one, the old power pack was defective. 5. Replace the BiCU. SC Tables 467

• Code: 312-02
• Description: Charge roller feed back voltage error: Cy. The feedback voltage of the charge AC for each color is 0.3V or less for consecutive 200ms after the charge AC is activated in the standard or half line speed.
• Causes: • Disconnected/incorrect harness for the power pack • Damaged/incorrect PCU • Power pack failure • Disconnected harness/connector
• Remedy: 1. Check the drum condition: Check the terminal to see if there is dust, damage, or deformation. Check the continuity as well. If not good, replace the PCDU. If the SC reoccurs, go to the next step. 2. Check all the related connectors are firmly connected: If not good, reconnect the connector. Check if the SC reoccurs by cycling the power off/on. If the SC reoccurs, go to the next step. 3. Check the mainframe condition: Check if there is dust on the terminal for charging, or any damage/ deformation. Check the continuity between the power packs and charging terminal. If the SC reoccurs, go to the next step. 4. Check the Power pack: Try installing a new power pack to determine whether the power pack is the cause. If the SC does not occur with the new one, the old power pack was defective. 5. Replace the BiCU. SC Tables 467

• Code: 312-03
• Description: Charge roller feed back voltage error: Ma. The feedback voltage of the charge AC for each color is 0.3V or less for consecutive 200ms after the charge AC is activated in the standard or half line speed.
• Causes: • Disconnected/incorrect harness for the power pack • Damaged/incorrect PCU • Power pack failure • Disconnected harness/connector
• Remedy: 1. Check the drum condition: Check the terminal to see if there is dust, damage, or deformation. Check the continuity as well. If not good, replace the PCDU. If the SC reoccurs, go to the next step. 2. Check all the related connectors are firmly connected: If not good, reconnect the connector. Check if the SC reoccurs by cycling the power off/on. If the SC reoccurs, go to the next step. 3. Check the mainframe condition: Check if there is dust on the terminal for charging, or any damage/ deformation. Check the continuity between the power packs and charging terminal. If the SC reoccurs, go to the next step. 4. Check the Power pack: Try installing a new power pack to determine whether the power pack is the cause. If the SC does not occur with the new one, the old power pack was defective. 5. Replace the BiCU. SC Tables 467