• Code: SC402
• Description: ID Sensor Error 3: ID Sensor Pattern Error
  One of the following ID sensor output voltages was detected when checking the covered are of the ID sensor pattern:
  • Vsp >= 2.5 V
  • Vsp = 0 V
• Causes: • ID sensor harness, connector is loose, broken, or defective
  • ID sensor dirty
  • ID sensor defective
  • IOB defective
  • LD Unit defective
  • BCU defective
  • Development power pack defective

• Code: SC406
• Description: ID Sensor Error 4: ID Sensor Pattern Not Detected
  At the ID sensor pattern check of the covered area of the ID sensor pattern, the value of the edge voltage was not 2.5 V for 1.5 seconds.
• Causes: • ID sensor harness, connector is loose, broken, or defective
  • ID sensor dirty
  • ID sensor defective
  • IOB defective
  • LD Unit defective
  • BCU defective
  • Development power pack defective

• Code: SC420
• Description: Drum Potential Sensor Error 1: Vd Adjustment ErrorWhen Vd (drum potential of the latent ID sensor pattern before exposure) was adjusted during auto process control: After 5 adjustments by Vg (voltage output of the charge corona unit) Vd failed to attain the value of SP2001 006 (total corona voltage for Photo Mode at normal speed) or Vd failed to attain the value of SP2001 012 for the CPM down mode (but not Photo Mode).
• Causes: • Drum potential sensor harness, connector is loose, broken, defective
  • Drum potential sensor dirty
  • Drum potential sensor defective
  • Drum connector, harness loose, broken, defective
  • Development power pack defective
  • BCU defective

• Code: SC424
• Description: Drum Potential Sensor Error 2: Vl Error
  At auto process control initialization, the VL detected after creation of the ID sensor pattern is greater than 400. Note: Vl is the drum potential after maximum laser exposure, determined by reading the white patches of the potential sensor pattern. To change Vl, the machine adjusts the input current of the laser diodes.
• Causes: • Drum worn
  • LD unit dirty
  • Poor drum ground connection

• Code: SC428
• Description: Drum Potential Sensor Error 3: Vh Adjustment Error
  The correct value for Vh (standard drum potential for halftones) could not be detected after 45 consecutive adjustments of LD power: • The value for SP3904 001 could not be attained for normal speed, or the value of SP3904 002 could not be attained for low speed mode. • The LD power adjustments exceeded the upper and lower limits (+185 and –70).
• Causes: • Drum potential sensor harness, connector is loose, broken, defective
  • Drum potential sensor dirty
  • Drum potential sensor defective
  • Drum unit connector, harness loose, broken, defective
  • Poor drum ground connection
  • LD unit defective
  • BCU defective

• Code: SC435
• Description: PCU Set Error
  The PCU is not installed, or it is installed incorrectly. The PCU unit set switch is checked every time the machine is turned on and when the front doors are closed.
• Causes: 1. Pull out the PCU unit.
  2. Install it again.
  3. Close the front doors
  4. Cycle the machine off/on

• Code: SC437
• Description: Drum Potential Sensor Error 4: Vd Detection Error
  During execution of auto process control for normal speed and CPM down mode when VD was detected VG= -900V
• Causes: • Do SP3902 001 to determine if auto process control has been turned off. If this SP is off, turn it on.

• Code: SC438
• Description: Drum Potential Sensor Error 5: ID Sensor Pattern Potentia
  When the ID sensor potential (Vp) was measured after a cold start, or at the end of a job, the total of this reading and the value of the setting of SP2201 004 did not exceed 800V (development unit power pack output) after 10 continuous samplings.
• Causes: • Drum potential sensor defective
  • BCU defective
  • IOB defective
  • Poor drum unit connection or connectors defective
  • Poor drum ground connection
  • LD defective
  • Poor drum cleaning ground connection
  • Drum worn
  • Dirty laser optics