• Code: U4 03
• Description: ADU trailing edge plate operation error. The plate won’t move from home position more than 1 second after sending the command to leave home position. Or the plate won’t return to home position within 5 seconds after sending the command to return to home position.
• Causes: Home position sensor defective Trailing edge plate shift motor defective Control PWB (PCU) defective Trailing edge plate driving belt or gear damaged or improperly adjusted.
• Remedy: Check home position sensor with SIM9-2. Check trailing edge plate operation with SIM9-3. Check connection between PCU PWB, motor, and sensor. Remove ADU and check gear and belt for damage.

• Code: U5 00
• Description: RADF communication trouble Detail Communication line test error occurs when power is turned on or after the exit of a simulation mode. Improper communication with RADF
• Causes: Improper connection or broken wire of connector or harness RADF control PWB defective Control PWB (PCU) defective Malfunction due to noise
• Remedy: Check communication line connector and harness. Clear the trouble by turning power supply On/Off.

• Code: U5 01
• Description: RADF resist sensor detection trouble
• Causes: Sensor defective Improper connection of sensor harness inside RADF. RADF control PWB defective
• Remedy: Check resist sensor detection with SIM2-2. Check sensor harness inside RADF.

• Code: U5 02
• Description: RADF eject/inversion sensor detection trouble
• Causes: Defective sensor Improper connection of sensor harness inside RADF. RADF control PWB defective
• Remedy: Check eject/inversion sensor detection with SIM2-2. Check sensor harness inside RADF.

• Code: U5 03
• Description: RADF timing sensor detection trouble
• Causes: Defective sensor Improper connection of sensor harness inside RADF RADF control PWB defective
• Remedy: Check timing sensor detection with SIM2-2. Check sensor harness inside RADF.

• Code: U5 11
• Description: Paper feed motor driving error
• Causes: Motor lock Improper motor speed Overcurrent to motor RADF control PWB defective
• Remedy: Check paper feed motor operation with SIM2-3,4.

• Code: U5 12
• Description: RADF transport motor driving error
• Causes: Motor lock Improper motor speed Overcurrent to motor RADF control PWB defective
• Remedy: Check paper feed motor operation with SIM2-5,6.

• Code: U6 00
• Description: Desk communication trouble. Failed communication with desk Communication line test error occurs when power is turned on or after the exit of a simulation mode.
• Causes: Improper connection or broken wire of connector or harness Desk control PWB defective Control PWB (PCU) defective Malfunction due to noise.
• Remedy: Clear the trouble by turning the power supply On/Off. Check communication line connector and harness.