• Code: 4501-111.63
• Description: Laser malfunction
  Timed out on reboot sweep.
• Causes: • Printhead (PH) • Controller board (CTLB)
• Remedy: 1 Check PH cables JLSU1 and J6 for proper connection. Reseat the cables if any abnormality is found. 2 Inspect PH cables and connectors. 3 Replace CTLB. 4 Replace PH.

• Code: 4501-111.64
• Description: Laser malfunction
  Attempted to exceed open loop drive limits.
• Causes: • Printhead (PH) • Controller board (CTLB)
• Remedy: 1 Check PH cables JLSU1 and J6 for proper connection. Reseat the cables if any abnormality is found. 2 Inspect PH cables and connectors. 3 Replace CTLB. 4 Replace PH.

• Code: 4501-111.65
• Description: Laser malfunction
  Attempted to exceed open loop drive limits.
• Causes: • Printhead (PH) • Controller board (CTLB)
• Remedy: 1 Check PH cables JLSU1 and J6 for proper connection. Reseat the cables if any abnormality is found. 2 Inspect PH cables and connectors. 3 Replace CTLB. 4 Replace PH.

• Code: 4501-111.66
• Description: Laser malfunction
  Failed alignment of printhead.
• Causes: • Printhead (PH) • Controller board (CTLB)
• Remedy: 1 Check PH cables JLSU1 and J6 for proper connection. Reseat the cables if any abnormality is found. 2 Inspect PH cables and connectors. 3 Replace CTLB. 4 Replace PH.

• Code: 4501-111.67
• Description: Laser malfunction
  Failed alignment of printhead.
• Causes: • Printhead (PH) • Controller board (CTLB)
• Remedy: 1 Check PH cables JLSU1 and J6 for proper connection. Reseat the cables if any abnormality is found. 2 Inspect PH cables and connectors. 3 Replace CTLB. 4 Replace PH.

• Code: 4501-111.68
• Description: Laser malfunction
  Too many fake HSYNCs while aligning printhead.
• Causes: • Printhead (PH) • Controller board (CTLB)
• Remedy: 1 Check PH cables JLSU1 and J6 for proper connection. Reseat the cables if any abnormality is found. 2 Inspect PH cables and connectors. 3 Replace CTLB. 4 Replace PH.

• Code: 4501-111.69
• Description: Laser malfunction
  Too many fake HSYNCs while aligning printhead.
• Causes: • Printhead (PH) • Controller board (CTLB)
• Remedy: 1 Check PH cables JLSU1 and J6 for proper connection. Reseat the cables if any abnormality is found. 2 Inspect PH cables and connectors. 3 Replace CTLB. 4 Replace PH.

• Code: 4901
• Description: FW/OS integrity verification error
  • NG results from verification of the hash value of the controller FW. • Faulty, damaged, or illegally written ROM data.
• Causes: Controller board (CTLB)
• Remedy: 1 Turn OFF/ON the main power switch. 2 Rewrite the firmware. 3 Check CTLB for proper connection and correct as necessary. 4 Replace CTLB