• Code: C5A
• Description: Communications error between LGC-CPU and printer controller
• Remedy: <<For a built-in type printer controller>> 1. Check if the printer controller unit is securely mounted on the copier. 2. Check if the harness between the LGC and IMC boards is open-circuited, and if the connector J113 on the LGC board and the connector J182 on the IMC board are disconnected. 3. Check if the harness between the switching power supply and the printer controller is open-circuited. 4. Check if the connector J710 of the switching power supply is disconnected. 5. Check if any conductor pattern on the IMC, IMG, MTH2 and LGC boards is open- or shortcircuited . 6. Replace the LGC board. 7. Replace the IMG board. 8. Replace the IMC board. 9. Replace the MTH2 board. <<For an external type printer controller>> 1. Check if the printer controller power is turned ON. 2. Check if the harness between the PIF board and the printer controller is open-circuited. 3. Check if the PIF board is firmly connected to the MTH2 board. 4. Check if the harness between the LGC and IMC boards is open-circuited, and if the connector J113 on the LGC board and the connector J182 on the IMC board are disconnected. 5. Check if any conductor pattern on the PIF, IMG, MTH2, IMC and LGC boards is open- or short-circuited. 6. Replace the PIF board. 7. Replace the LGC board. 8. Replace the IMG board. 9. Replace the IMC board. 10. Replace the MTH2 board.

• Code: C5B
• Description: LGC-CPU signal transmission error to IMC-CPU
• Remedy: 1. Check if the harness between the LGC and IMC boards is open-circuited, and if the connector J113 on the LGC board and the connector J182 on the IMC board are disconnected. 2. Replace the LGC board. 3. Replace the IMC board.

• Code: C5C
• Description: LGC-CPU signal reception error from IMC-CPU
• Remedy: 1. Check if the harness between the LGC and IMC boards is open-circuited, and if the connector J113 on the LGC board and the connector J182 on the IMC board are disconnected. 2. Replace the LGC board. 3. Replace the IMC board.

• Code: C7
• Description: Error C7
• Remedy: 1. Check if any thermistor connector is disconnected. 2. Check if any harness of the thermistors (center/rear, upper/lower) is open-circuited. 3. Check the LGC board if the connector J122 is disconnected. 4. After completing the repair of what caused the [C7] problem, proceed to rewrite the status counter (08-700) to "0", following the same procedure as for [C41] to [C48] .

• Code: C72
• Description: Aligning sensor automatic adjustment error
• Remedy: 1. Check if any foreign matter is present between the aligning sensor and the reflecting mirror, and if the reflecting mirror is stained. 2. Check if the harness between the aligning sensor and the RADF PC board is open-circuited. 3. Check if any conductor pattern on the RADF PC board is open- or short-circuited mainly around IC1, IC14 and CN14. 4. Replace the aligning sensor. 5. Replace the RADF PC board. 6. Initialize the RADF's EEPROM and perform the sensor automatic adjustment.

• Code: C73
• Description: EEPROM initializing error
• Remedy: 1. Check if any conductor pattern on the RADF PC board is open- or short-circuited mainly around IC7. 2. Replace the RADF PC board. 3. Initialize the RADF's EEPROM and perform the sensor automatic adjustment.

• Code: C74
• Description: Paper exit sensor automatic adjustment error
• Remedy: 1. Check if any foreign matter is present between the exit sensor and the reflecting mirror, and if the reflecting mirror is stained. 2. Check if the harness between the exit sensor and the RADF PC board is open-circuited. 3. Check if any conductor pattern on the RADF PC board is open- or short-circuited mainly around IC1, IC14 and CN8. 4. Replace the exit sensor. 5. Replace the RADF PC board. 6. Initialize the RADF's EEPROM and perform the sensor automatic adjustment.

• Code: C82
• Description: Communications error between scanner and ADF
• Remedy: 1. Check if the connectors are disconnected or the harnesses are open-circuited between the SCM board and RADF PC board (includig the relay connector). 2. Replace the RADF PC board. 3. Replace the SCM board.