Konica-Minolta bizhub 4050
- 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
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