• Code: E7-03
• Description: HSYNC not detected.
• Causes: LSU (laser diode, reception element, APC circuit) trouble
  LSU drive circuit (ASIC) trouble

• Code: E7-04
• Description: CCD white level trouble
• Causes: CCD drive circuit (CCD PWB, ASIC harness) trouble
  Copy lamp lighting trouble (Copy lamp, invertor PWB)

• Code: E7-05
• Description: CCD black level trouble
• Causes: CCD drive circuit (CCD PWB, ASIC, harness) trouble

• Code: E7-12
• Description: Shading trouble (White correction)
• Causes: Dirt on white plate for scanning white level

• Code: E7-14
• Description: ASIC connection trouble
• Causes: Improper connection between CPU and ASIC (pattern cut, improper connection of lead pin)

• Code: E7-15
• Description: Copy lamp disconnection trouble
• Causes: Copy lamp or copy lamp drive circuit (invertor PWB) trouble Copy lamp disconnection

• Code: E7-16
• Description: Abnormal output of laser
• Causes: LSU (laser diode, reception element, APC circuit) trouble
  LSU drive circuit (ASIC) trouble

• Code: H2-00
• Description: Thermistor open detection
• Causes: The fusing thermistor is open.