• Code: SC227
• Description: Laser Synchronization Detector Error 2: C Leading Edge (Other than LD0)
  While the polygon motor is rotating normally, no synchronizing detection signal is output for cyan, leading edgefor any LD other than LD0, even after the laser diode has been firing for 2 sec.
• Causes: • Beam not reflected in photo detection • GAVD on the BICU defective • LD driver defective • LDB defective • BCU defective • Check board connections, replace

• Code: SC230
• Description: FGATE error 1: Feedback remains HIGH for K write
  After the start of timing to create the black image, the PFGATE register of the GAVD does not assert, even after 5 sec. when: • Images are created on the drum. • MUSIC patterns are created on the transfer belt. The BICU received no feedback (LOW signal) from the LD unit to indicate that the lasers started firing at the prescribed time to create the patterns.
• Causes: • GAVD on the BICU defective • PCI I/F on the IPU defective • ASIC on the IOB defective • Controller board disconnected, defective • Harness between the BICU and LDB unit disconnected, loose, or defective. • Check board connections, replace

• Code: SC231
• Description: FGATE error 1: Feedback remains LOW for K write
  After the start of timing to create the black image, the PFGATE register of the GAVD does not assert, even after 5 sec. when: • Images are created on the drum. • MUSIC patterns are created on the transfer belt. The BICU received a LOW feedback signal, but the signal remained LOW (indicating the lasers were still operating), even after creation of the next image should have started.
• Causes: • GAVD on the BICU defective • PCI I/F on the IPU defective • ASIC on the IOB defective • Check board connections, replace

• Code: SC232
• Description: FGATE error 1: Feedback remains HIGH for Y write
  After the start of timing to create the yellow image, the PFGATE register of the GAVD does not assert, even after 5 sec. when: • Images are created on the drum. • MUSIC patterns are created on the transfer belt. The BICU received no feedback (LOW signal) from the LD unit to indicate that the lasers started firing at the prescribed time to create the patterns.
• Causes: • GAVD on the BICU defective • PCI I/F on the IPU defective • ASIC on the IOB defective • Controller board disconnected, defective • Harness between the BICU and LDB unit disconnected, loose, or defective. • Check board connections, replace

• Code: SC233
• Description: FGATE error 1: Feedback remains LOW for Y write
  After the start of timing to create the yellow image, the PFGATE register of the GAVD does not assert, even after 5 sec. when: • Images are created on the drum. • MUSIC patterns are created on the transfer belt. The BICU received a LOW feedback signal, but the signal remained LOW (indicating the lasers were still operating), even after creation of the next image should have started.
• Causes: • GAVD on the BICU defective • PCI I/F on the IPU defective • ASIC on the IOB defective • Check board connections, replace

• Code: SC234
• Description: FGATE error 1: Feedback remains HIGH for M write
  After the start of timing to create the magenta image, the PFGATE register of the GAVD does not assert, even after 5 sec. when: • Images are created on the drum. • MUSIC patterns are created on the transfer belt. The BICU received no feedback (LOW signal) from the LD unit to indicate that the lasers started firing at the prescribed time to create the patterns.
• Causes: • GAVD on the BICU defective • PCI I/F on the IPU defective • ASIC on the IOB defective • Controller board disconnected, defective • Harness between the BICU LDB unit disconnected, loose, or defective. • Check board connections, replace

• Code: SC235
• Description: FGATE error 1: Feedback remains LOW for M write
  After the start of timing to create the magenta image, the PFGATE register of the GAVD does not assert, even after 5 sec. when: • Images are created on the drum. • MUSIC patterns are created on the transfer belt. The BICU received a LOW feedback signal, but the signal remained LOW (indicating the lasers were still operating), even after creation of the next image should have started.
• Causes: • GAVD on the BICU defective • PCI I/F on the IPU defective • ASIC on the IOB defective • Check board connections, replace

• Code: SC236
• Description: FGATE error 1: Feedback remains HIGH for C write
  After the start of timing to create the cyan image, the PFGATE register of the GAVD does not assert, even after 5 sec. when: • Images are created on the drum. • MUSIC patterns are created on the transfer belt. The BICU received no feedback (LOW signal) from the LD unit to indicate that the lasers started firing at the prescribed time to create the patterns.
• Causes: • GAVD on the BICU defective • PCI I/F on the IPU defective • ASIC on the IOB defective • Controller board disconnected, defective • Harness between the BICU and LDB unit disconnected, loose, or defective. • Check board connections, replace