• Code: 302
• Description: Charge roller bias leak
  The charge roller bias leak signal is detected.
• Causes: • Charge roller damaged • High voltage supply board defective • PCDU harness defective or disconnected

• Code: 304
• Description: Charge roller bias correction leak
  The charge roller bias correction is performed twice even if the maximum charge roller bias (-2000V) is applied to the roller.
• Causes: • ID sensor defective • Worn charge roller • Charge roller damaged

• Code: 320
• Description: Development roller bias leak
  A development roller bias leak is detected for 60 ms after the high voltage has been supplied to the development unit.
• Causes: • Development bias leak • Broken harness • Defective high voltage power supply, voltage supply • Defective high voltage supply unit

• Code: 324
• Description: Development paddle motor error
  The machine detects a lock signal error from the development puddle motor for 2 seconds after the drum motor has turned on.
• Causes: • Overload on the development puddle motor • Defective development puddle motor • Defective harness • Defective IOB

• Code: 350
• Description: ID sensor pattern test error
  One of the following readings occurred 10 times in the ID sensor output when the ID sensor pattern was checked: 1) Vsp . 2.5V 2) Vsg . 2.5V 3) Vsp =0V 4) Vsg = 0V
• Causes: • ID sensor connector defective • Poor ID sensor connector connection • I/O board (IOB) defective • Poor writing of ID sensor pattern on the drum • High voltage supply board defective

• Code: 351
• Description: ID sensor Vsg test error
  When the ID sensor was checked, the ID sensor output voltage is 5.0V while the LED current value is 0.
• Causes: • ID sensor defective or dirty • ID sensor connector defective • Poor ID sensor connection • I/O board (IOB) defective • Defect at the ID sensor pattern writing area of the drum

• Code: 355
• Description: Grayscale measurement error
  When the grayscale control result is the maximum and it does not operate correctly and these cases are detected 15 times.
• Causes: • ID sensor defective or dirty • The life of ID sensor or photo conductor • Shield glass dirty

• Code: 360
• Description: TD sensor (Vt) error 1
  The following condition occurs thirty times consecutively during printing. Vt is less than 0.5V or 4.8V or more
• Causes: • TD sensor disconnected • Harness between TD sensor and PCDU defective • Defective TD sensor