• Code: SC951
• Description: F-GATE Signal Error
  When the IPU has already received the F-GATE signal (laser writing start trigger signal), the IPU receives another F-GATE signal.
• Causes: • Software defective; switch off/on, or change the BCU firmware if this does not solve the problem • BCU defective

• Code: SC953
• Description: Scanner Image Setting Error
  The settings required for image processing using the scanner are not sent from the IPU.
• Causes: • Check the connections between the MCU and LCDC and BCU • Replace the MCU, BCU, or IPU • Change the BCU or MCU firmware

• Code: SC954
• Description: Printer Image Setting Error
  The settings that are required for image processing using the printer controller are not sent from the IPU.
• Causes: • Check the connections between the IPU and the LDB, and from the LDB to the polygon mirror motor control PCB. • Change the IPU or LDB • Change the polygon mirror motor or the polygon mirror motor control PCB • Change the BCU firmware

• Code: SC955
• Description: Memory Setting Error
  The settings that are required for image processing using the memory are not sent from the IPU.
• Causes: • Format the hard disks • Change the hard disks • Controller defective • Change the mother board or IPU • Change the controller firmware or the BCU firmware

• Code: SC964
• Description: Scanner Start Error
  During scanned image processing, another command to start scanning was received.
• Causes: • Change the BCU firmware

• Code: SC965
• Description: Print Start Error
  During print processing, another command to start printing was received.
• Causes: • Change the BCU firmware

• Code: SC966
• Description: Polygon Mirror Motor Ready Error
  The polygon mirror motor does not reach ready status within 15 s after the copy paper is detected by the registration sensor. (15 s after the write request was issued for the IPU, the F-GATE signal remained LOW.)
• Causes: • Polygon mirror motor defective • Poor connection between polygon mirror motor drive board and BCU • Polygon mirror motor drive board defective • BCU defective

• Code: SC970
• Description: Scanner Ready Error
  The scan ready signal is not generated by the MCU for more than 10 s after the read start signal is sent to the MCU.
• Causes: • Serial data transfer between MCU and BCU (through the LCDC) • Change the MCU firmware