• Code: F11
• Description: Communications error between system-CPU and scanner-CPU
• Remedy: Did the error occur immediately after updating the firmware? Y: Are the proper files saved in the PC? (In case of updating by PC) Are the type, attaching position and direction of the ROM correct? (In case of updating by download jig) N: After correcting, perform the firmware updating again. N: 1. Check if the IMG board connector J161 is disconnected. 2. Check if the SCM board connector J1 is disconnected. 3. Check if the harness between the IMG and SCM boards is open-circuited. 4. Check if the IMG board is securely connected to the MTH1 board. 5. Check if the SYS board is securely connected to the MTH1 board. 6. Check the version of FROM on the SYS board. 7. Check the version of FROM on the SCM board. 8. Check the scanner related setting values (08-360 and 361). 9. Replace the SYS board. 10. Replace the IMG board. 11. Replace the SCM board.

• Code: F12
• Description: Communications error between system-CPU and scanner-CPU
• Remedy: Did the error occur immediately after updating the firmware? Y: Are the proper files saved in the PC? (In case of updating by PC) Are the type, attaching position and direction of the ROM correct? (In case of updating by download jig) N: After correcting, perform the firmware updating again. N: 1. Check if the IMG board connector J161 is disconnected. 2. Check if the SCM board connector J1 is disconnected. 3. Check if the harness between the IMG and SCM boards is open-circuited. 4. Check if the IMG board is securely connected to the MTH1 board. 5. Check if the SYS board is securely connected to the MTH1 board. 6. Check the version of FROM on the SYS board. 7. Check the version of FROM on the SCM board. 8. Check the scanner related setting values (08-360 and 361). 9. Replace the SYS board. 10. Replace the IMG board. 11. Replace the SCM board.

• Code: F13
• Description: Communications error between system-CPU and LGC-CPU
• Remedy: Did the error occur immediately after updating the firmware? Y: Are the proper files saved in the PC? (In case of updating by PC) Are the type, attaching position and direction of the ROM correct? (In case of updating by download jig) N: After correcting, perform the firmware updating again. Y: Though the firmware updating was carried out correctly, error occurs.) N: Did the error occur during printing by the printer controller? Y: Turn OFF and ON the power of printer controller. N: 1. Check if the SYC board is securely connected to the MTH1 board. 2. Check if the IMC board is securely connected to the MTH1 board. 3. Check if the IMC board connector J182 is disconnected. 4. Check if the LGC board connector J113 is disconnected. 5. Check if the harness between the IMC and LGC boards is open-circuited. 6. Check the version of FROM on the SYS board. 7. Check the version of MROM on the LGC board. 8. Check the version of IMC-ROM on the IMC board. 9. Replace the SYS board. 10. Replace the IMC board. 11. Replace the LGC board.

• Code: F51
• Description: Communications error between system-CPU and AI board during pre-scanning
• Remedy: 1. Check if the AI board is securely connected to the connector on the IMG board. 2. Check if the IMG board is securely connected to the MTH1 board. 3. Check if the SYS board is securely connected to the MTH1 board. 4. Check if FROM is mounted on the IC8 on the AI board. 5. Check if FROM is mounted in the proper direction on the AI board. 6. Replace the AI board. 7. Replace the IMG board. 8. Replace the SYS board. 9. Replace the MTH1 board. * Service call [F51] occurs only when copying with the original mode “AI” selected. The other original modes are operable.