Ricoh SP8400DN

• Code: SC240-00
• Description: LD Error
  • The LD error status of LD driver is asserted after the LD is initialized.
  • The LD driver's error signal is detected during LD initialization.
• Causes: • LD degradation (LD broken, shift of output characteristics etc.)
  • The interface harness damaged or not connected correctly.
  • LD driver defective
• Remedy: • Cycle the main power off/on.
  • Replace the laser unit.
  • Replace the harness.
  • Replace the IPU board.

• Code: SC272-01
• Description: LD Driver Communication Error
  If the value is not same when the machine reads and writes the same registration at the machine start-up. If the communication parity retries three consecutive times, the SC is generated.
• Causes: • CPU defective
  • IPU defective
  • BCU defective
  • Harness defective
• Remedy: • Cycle the main power off/on.
  • Replace the laser unit.
  • Replace the harness.
  • Replace the IPU board.

• Code: SC272-10
• Description: LD Driver Communication Error: Others
  If the “Door Open” status does not change to “Door Close” after closing the door.
• Causes: • CPU defective
  • IPU defective
  • BCU defective
  • Harness defective
• Remedy: • Cycle the main power off/on.
  • Replace the laser unit.
  • Replace the harness.
  • Replace the IPU board.

• Code: SC302-00
• Description: High Voltage Power Source: Charge: Output Error
  The machine detects the error detection signal “L (unexpected)” 10 times for 200 msec consecutively when monitoring the error signal every 20 msec during outputting the PWM signal.
• Causes: Hardware error
  • Input / Output connector is disconnected.
  • Input / Output harness is short-circuited.
  • Surface/air clearance insufficient (arc discharge)
  • BCU error (signal error)
  • HVPS defective
  Load error
  • Grounding fault of charging output, short-circuit with other outputs
  • Surface/air clearance insufficient in charging output path (including distance from other outputs)
  • Unexpected deterioration of drum and over current due to pinholes gap error between the drum and charge roller (PCU error).
  • Over current due to drum surface condensation
  • PCU is disconnected.
• Remedy: • Cycle the main power off/on.
  • Replace the HVPS.
  • Replace the harness of the HVPS.
  • Replace the harness of the PCU.
  • Replace the PCU.

• Code: SC324-01
• Description: Development Motor: Bk: Lock
  Lock signals are observed at 2 sec intervals during motor ON, and a High level is detected at least 20 times.
• Causes: • Motor defective
  • Connector disconnected
  • Harness broken
  • BCU defective
  • Unit torque increased
• Remedy: • Replace the development motor.
  • Reconnect the connector.
  • Replace the harness.
  • Replace the BCU.
  • Replace the development unit.
  • Replace the driven unit.

• Code: SC360-01
• Description: TD Sensor Adjustment Error
  • When Mu count exceeds the judgment threshold of no developer status.
  • When Mu count does not satisfy the following target ranges for 3 times in a row. • Upper threshold • Lower threshold
• Causes: • TD sensor defective
  • Loose connection
  • Harness broken
  • Developer toner density differs from initial developer
• Remedy: • Replace the TD sensor harness.
  • Reconnect the TD sensor connector.
  • Replace the TD sensor.
  • Replace the development unit.