• Code: C1B0
• Description: LCF transport motor abnormality: The LCF transport motor is not rotating normally (when paper can be fed from any drawer except the LCF).
• Causes: LCF transport motor LCF board LGC board
• Remedy: 1 Is the LCF transport motor working? (Perform the output check: 03-122/172) Yes 2 No • Check if the connector CN3, CN30 of the LCF transport motor is disconnected. • Check if the connector CN102 on the LCF board is disconnected. • Check if the signal line connector CN100 on the LCF board is disconnected. • Check if the power line connector CN101 on the LCF board is disconnected. • Check if the connector CN371 on the LGC board is disconnected. • Check if the connector pins are disconnected or the harnesses are open circuited. • Check if the connector pins are disconnected or the harnesses are open circuited. 2 LCF transport motor LGC board • Check if the connector pins are disconnected or the harnesses are open circuited. • Check if the conductor patterns on the LCF transport motor board, LCF board and LGC board are short circuited or open circuited. • Check if the PLL lock signal CN102-3 pin output from the LCF board is always “L” level. • Check if the voltage supplied to the microcomputer input terminal IC103-17 pin is always “L” level.

• Code: C260
• Description: Peak detection error: Lighting of the exposure lamp (white reference) is not detected when power is turned ON, or communication error with CCD board.
• Causes: Lens unit SYS board Exposure lamp Power supply harness
• Remedy: 1 Does the exposure lamp light? (Perform the output check: 03-267) Yes It is lit. 2 No It is not lit. 3 2 Shading correction plate Check if there is any scratch or stain on the shading correction plate. Mirror Check if the mirror is tilted. • Check that the lens is reflected in the mirror looking at carriage-1 from the upper position. • Check that the mirror is secured at the leaf spring. Exposure lamp 1. Check if the exposure lamp is correctly lit. 2. Check if the harness is connected properly to the exposure lamp connector. 3. When the carriage is driven, check if the harness interferes with it or parts are caught in it. CCD board / Lens unit 1. Check if the connector of the CCD board is connected properly. 2. Check if the CCD board is installed properly. (Check that the lens unit is not tilted or the screw is securely tighten.) SYS board 1. Check if the connector of the SYS board (CN122, CN126) is connected properly. 2. Check if the mounted parts on the SYS board are damaged or abnormal. 3. Check if 10 V is output from the power supply for CCD. (CN122-1pin). 3 SYS board 1. Check if the supply cable is connected properly to the connector (CN127). 2. Check if the mounted parts on the SYS board are damaged or abnormal. Exposure lamp 1. Check if the harness of the exposure lamp is connected to the LED light source properly. 2. Check if the exposure lamp is scratched or damaged. 3. Check if the exposure lamp harness comes off the board. Power supply harness 1. Check if wiring of the power supply harness (CN127) is abnormal. 2. Check if the harness is scratched or open circuited.

• Code: C270
• Description: Carriage home position sensor not turning OFF within a specified period of time: The carriage does not shift from its home position in a specified time.
• Causes: Carriage home position sensor Carriage home position sensor harness SYS board Scan motor Scan motor harness
• Remedy: 1 Carriage locking Check if the carriage locking screw for packaging is attached. 2 Carriage home position sensor 1. Check if the harness of the carriage home position sensor is connected properly. 2. Check if the harness is caught or open circuited. 3 SYS board 1. Check if the connector of the SYS board (CN121, CN125, CN127) is connected properly. 2. Check if the mounted parts on the SYS board are damaged or abnormal. 3. Check if 24 V (CN127) on the SYS board is short circuited. 4. Check if 24 V is supplied to the SYS board (CN127). 4 Scan motor 1. Check if the belt tension is loosened. 2. Check if the motor fixing screw is loosened. 3. Check if the carriage wire and the timing belt come off. 4. Check if the connector (J007/J125) is connected to the motor properly. 5. Check if the harness of the motor is caught or open circuited.

• Code: C280
• Description: Carriage home position sensor not going ONwithin a specified time
• Causes: Carriage home position sensor Carriage home position sensor harness SYS board Scan motor Scan motor harness
• Remedy: 1 Carriage locking Check if the carriage locking screw for packaging is attached. 2 Carriage hole position sensor 1. Check if the harness is properly connected to the sensor. 2. Check if the harness is caught or open circuited. 3 SYS board 1. Check if the harness (J002/J121) of the carriage home position sensor is connected properly. 2. Check if the mounted parts on the SYS board are damaged or abnormal. 3. Check if 24 V (CN127) on the SYS board is short circuited. 4. Check if 24 V is supplied to the SYS board (CN127). 4 Scan motor 1. Check if the belt tension is loosened (if the motor screw is loosened). 2. Check if the carriage wire and the timing belt come off. 3. Check if the connector (J007/J125) is connected to the motor properly. 4. Check if the harness of the motor is caught or open circuited.

• Code: C290
• Description: Scanner fuse blowout: 24V power for the scanning system is not supplied at the scanner warming-up after power-ON.
• Causes: SYS board Fuse (F204) Power supply harness LVPS
• Remedy: Is 24V supplied to the SYS board? Yes Check the following because the signal for checking 24V on the SYS board is abnormal. 1. Check if 3V is input in 35 Pin of the scanner CPU (IC301). 2. Check if the mounted parts on the SYS board are damaged or abnormal. 3. Check if 24V on the SYS board is short circuited. 4. Check if 24V is supplied to the SYS board (CN127). No 1. Check if the 24V supply harness is properly connected to the connector (CN127). 2. Check if 24V and SG on the SYS board are short circuited. 3. Check if the power supply is short circuited by pulling out the supply harness on the SYS board (CN127). 4. Check if the fuse on the LVPS (F204) is open circuited. 5. Check if there is no abnormality on the LVPS.

• Code: C370
• Description: Drum TBU motor abnormality
• Causes: Drum TBU motor LGC board
• Remedy: Transfer belt unit • Connector check (J1061, J1063) • Check if the transport belt unit is working normally. Drum TBU motor Connector check LGC board Connector check (CN388) Transfer belt Check if it’s normal Release detection sensor Sensor check

• Code: C380
• Description: Auto-toner sensor-K abnormality (upper limit)
• Causes: Auto toner sensor Harness LGC board Developer material
• Remedy: 1 Developer unit • Check if the developer unit is installed properly. • Check that the developer unit and coupling on the equipment side are properly engaged. • Check that the mixer of the developer unit is rotated. • Check if the developer material is too dark visually. • Check if the amount of the developer material is too large or too small. • Remove any toner or dust on the ATC sensor connector and the drawer connector of the process cover. • Remove any toner or dust on the EPU sensor connector and the drawer connector on the equipment side. 2 Auto toner sensor - Equipment Harness - LGC board • Check the connectors and harnesses between the auto toner sensor and LGC board (CN365). • Remove any foreign matter such as toner in the connector of the auto toner sensor.

• Code: C381
• Description: Auto-toner sensor-K abnormality (lower limit)
• Causes: Auto toner sensor Harness LGC board Developer material
• Remedy: 1 Developer unit • Check if the developer unit is installed properly. • Check that the developer unit and coupling on the equipment side are properly engaged. • Check that the mixer of the developer unit is rotated. • Check if the developer material is too light visually. • Check if the amount of the developer material is too large or too small. • Remove any toner or dust on the ATC sensor connector and the drawer connector of the process cover. • Remove any toner or dust on the EPU sensor connector and the drawer connector on the equipment side. 2 Auto toner sensor Harness LGC board • Check the connectors and harnesses between the auto toner sensor and LGC board (CN365). • Check if there is any foreign matter such as toner in the connector of the auto toner sensor. Remove if there is and reconnect it.