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Ricoh Aficio 550

  • Code: SC390
  • Description: TD sensor error
    TD sensor output voltage falls out of the adjustment target (2.5+- 0.1 V) during the Vt check.
    Vt-Vtref>0.6V is detected 10 consecutive times even though toner is detected by the toner end sensor.
    Vt<0.5 or Vt>4.0 is detected.
  • Causes: • TD sensor abnormal • BCU board defective
Error Code
Service Mode, Troubleshooting
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