• Code: 2A94-133.05
• Description: Toner empty censor error
  Toner level sensor reading above maximum expected value.
• Causes: • Toner level sensor (PS14) • Power supply unit (PU) • Controller board (CTLB)
• Remedy: 1 Check for loose toner blocking PS14. Clean the CTLS if any abnormality is found. 2 Check the cable PCN3 for proper connection to PU. Reseat the cables if any abnormality is found. 3 Check PS14 cable for proper connection to the CTLB. Reseat the cables if any abnormality is found. 4 Check the cable PCN3 and PS14 cable for damage. 5 Replace CTLB. 6 Replace the printer.

• Code: 2A94-133.06
• Description: Toner empty censor error
  Toner level sensor reading below minimum expected value.
• Causes: • Toner level sensor (PS14) • Power supply unit (PU) • Controller board (CTLB)
• Remedy: 1 Check for loose toner blocking PS14. Clean the CTLS if any abnormality is found. 2 Check the cable PCN3 for proper connection to PU. Reseat the cables if any abnormality is found. 3 Check PS14 cable for proper connection to the CTLB. Reseat the cables if any abnormality is found. 4 Check the cable PCN3 and PS14 cable for damage. 5 Replace CTLB. 6 Replace the printer.

• Code: 2A94-133.08
• Description: Toner empty censor error
  Excessive the toner level sensor noise.
• Causes: • Toner level sensor (PS14) • Power supply unit (PU) • Controller board (CTLB)
• Remedy: 1 Check for loose toner blocking PS14. Clean the CTLS if any abnormality is found. 2 Check the cable PCN3 for proper connection to PU. Reseat the cables if any abnormality is found. 3 Check PS14 cable for proper connection to the CTLB. Reseat the cables if any abnormality is found. 4 Check the cable PCN3 and PS14 cable for damage. 5 Replace CTLB. 6 Replace the printer.

• Code: 3423-121.07
• Description: Fuser warm-up trouble
  Fuser has been on for more than allowed after a gap blowout, and the temperature is still too cold.
• Causes: • Controller board (CTLB) • Power supply unit (PU)
• Remedy: 1 Check the fuser cables JTHERM1 and JEXIT for proper connection to the CTLB. Reseat the cables if any abnormality is found. 2 Check the cable PCN5 for proper connection to power supply. Reseat the cables if any abnormality is found. 3 Check the cables JTHERM1, JEXIT and PCN5 for damage. Replace the fuser unit if any abnormality is found. 4 Check for resistance on the fuser cable. 1. Turn off the printer. 2. Remove the rear door and cover. 3. Disconnect the fuser cable connected to PCN5 of PU. 4. Check for approximate correct resistance on the fuser cable: 220V/43Om, 110V/10U, 100V/8Om

• Code: 3423-121.08
• Description: Fuser warm-up trouble
  Fuser was under temp when page was in fuser.
• Causes: • Controller board (CTLB) • Power supply unit (PU)
• Remedy: 1 Check the fuser cables JTHERM1 and JEXIT for proper connection to the CTLB. Reseat the cables if any abnormality is found. 2 Check the cable PCN5 for proper connection to power supply. Reseat the cables if any abnormality is found. 3 Check the cables JTHERM1, JEXIT and PCN5 for damage. Replace the fuser unit if any abnormality is found. 4 Check for resistance on the fuser cable. 1. Turn off the printer. 2. Remove the rear door and cover. 3. Disconnect the fuser cable connected to PCN5 of PU. 4. Check for approximate correct resistance on the fuser cable: 220V/43Om, 110V/10U, 100V/8Om

• Code: 3423-121.20
• Description: Fuser warm-up trouble
  Fuser undertemp during steady state control. Can occur in printing or standby modes.
• Causes: • Controller board (CTLB) • Power supply unit (PU)
• Remedy: 1 Check the fuser cables JTHERM1 and JEXIT for proper connection to the CTLB. Reseat the cables if any abnormality is found. 2 Check the cable PCN5 for proper connection to power supply. Reseat the cables if any abnormality is found. 3 Check the cables JTHERM1, JEXIT and PCN5 for damage. Replace the fuser unit if any abnormality is found. 4 Check for resistance on the fuser cable. 1. Turn off the printer. 2. Remove the rear door and cover. 3. Disconnect the fuser cable connected to PCN5 of PU. 4. Check for approximate correct resistance on the fuser cable: 220V/43Om, 110V/10U, 100V/8Om

• Code: 3423-121.22
• Description: Fuser warm-up trouble
  Fuser did not warm enough to start line voltage detection.
• Causes: • Controller board (CTLB) • Power supply unit (PU)
• Remedy: 1 Check the fuser cables JTHERM1 and JEXIT for proper connection to the CTLB. Reseat the cables if any abnormality is found. 2 Check the cable PCN5 for proper connection to power supply. Reseat the cables if any abnormality is found. 3 Check the cables JTHERM1, JEXIT and PCN5 for damage. Replace the fuser unit if any abnormality is found. 4 Check for resistance on the fuser cable. 1. Turn off the printer. 2. Remove the rear door and cover. 3. Disconnect the fuser cable connected to PCN5 of PU. 4. Check for approximate correct resistance on the fuser cable: 220V/43Om, 110V/10U, 100V/8Om

• Code: 3423-121.23
• Description: Fuser warm-up trouble
  Fuser took too long to heat to line detection temp.
• Causes: • Controller board (CTLB) • Power supply unit (PU)
• Remedy: 1 Check the fuser cables JTHERM1 and JEXIT for proper connection to the CTLB. Reseat the cables if any abnormality is found. 2 Check the cable PCN5 for proper connection to power supply. Reseat the cables if any abnormality is found. 3 Check the cables JTHERM1, JEXIT and PCN5 for damage. Replace the fuser unit if any abnormality is found. 4 Check for resistance on the fuser cable. 1. Turn off the printer. 2. Remove the rear door and cover. 3. Disconnect the fuser cable connected to PCN5 of PU. 4. Check for approximate correct resistance on the fuser cable: 220V/43Om, 110V/10U, 100V/8Om