• Code: U6-43
• Description: LCT3 lift-down trouble. The lower limit position (full state) of the LCT3 tray is not detected within the specified time (A4: 10sec, A3: 8sec) from starting lowering
• Causes: Remaining quantity sensor abnormality, LCT3 tray liftup motor lock, connector / harness connection trouble, PWB trouble.
• Remedy: Use Sim. 4-2 and Sim. 4-3 to check the operation of the remaining quantity sensor and the LCT3 tray lift-up motor, and check the wiring.

• Code: U6-48
• Description: LCT3 paper feed position abnormality. When the lift-up operation is started, the upper limit sensor is turned OFF before the pick-up SOL is turned ON. (Normally the upper limit sensor is turned OFF only after turning ON the pick-up SOL.)
• Causes: Sensor abnormality, connector and harness connection trouble, PWB trouble. The pick-up roller is kept in the lower position mechanically.
• Remedy: Use Sim. 4-2 and Sim. 4-3 to check the operation of the upper limit sensor and the lift-up operation, and check the wiring.

• Code: U6-49
• Description: LCT3 lift-up trouble. When lifting up, the upper limit is not detected within the specified time (A4 LCC: 10 sec, A3 LCC: 8 sec)
• Causes: Upper limit sensor abnormality, tray lift-up motor lock, connector/harness connection trouble, PWB trouble.
• Remedy: Use Sim. 4-2 and Sim. 4-3 to check the operation of the upper limit sensor and the lift-up operation, and check the wiring. After making the countermeasure for the trouble section, use Sim. 15 to cancel the trouble.

• Code: U6-51
• Description: LCC incompatible trouble. Error of model code mismatch between the LCC and the main unit
• Causes: Mismatch between the LCC and the main unit
• Remedy: Check the combination of the LCC and the main unit. When connecting to the main unit, the LCC firmware must be changed to the firmware corresponding to the machine.

• Code: U6-63
• Description: Manual feed tray lift-down trouble. The lower limit position is not detected within the specified time (10 sec) from starting the lowering operation of the manual feed tray
• Causes: Lower position sensor abnormality, manual tray lift-up motor lock, connector/harness connection trouble, PWB trouble.
• Remedy: Use Sim. 4-2 and Sim. 4-3 to check the operation of the lower limit sensor, and the manual feed tray lift-up motor, and check the wiring. After making the countermeasure for the trouble section, use Sim. 15 to cancel the trouble.

• Code: U6-68
• Description: Manual feed tray paper feed position abnormality. When the lift-up operation is started, the upper limit sensor is turned OFF before the pick-up SOL is turned ON. (Normally the upper limit sensor is turned OFF only after turning ON the pick-up SOL.)
• Causes: Sensor abnormality, connector and harness connection trouble, PWB trouble. The pick-up roller is kept in the lower position mechanically.
• Remedy: Use Sim. 4-2 and Sim. 4-3 to check the operation of the upper limit sensor and the lift-up operation, and check the wiring.

• Code: U6-69
• Description: Manual feed tray lift-up trouble. When lifting up, the upper limit is not detected within the specified time (10 sec)
• Causes: Upper limit sensor abnormality, tray lift-up motor lock, connector/harness connection trouble, PWB trouble.
• Remedy: Use Sim. 4-2 and Sim. 4-3 to check the operation of the upper limit sensor and the lift-up operation, and check the wiring. After making the countermeasure for the trouble section, use Sim. 15 to cancel the trouble.

• Code: U7-50
• Description: Serial vendor communication trouble. Communication error between the ICU and the serial vendor Section ICU
• Causes: Cable disconnection or breakage.
• Remedy: Check connection between the ICU and the serial vendor, and turn OFF /ON the power of the machine and the vendor.