Panasonic UF-580 Service Manual page 111

4.4.10. Improper Fusing (Printed image does not bond to the paper)
Is the recording paper damp?
Is the Fuser Unit normal?
Note:
Replace the entire Fuser Unit when the Thermostat, the Thermal Fuse or the Thermistor Assembly
becomes an open-circuit.
START
Yes
No
No
Yes
END
P
Replace the recording paper.
Replace the Fuser Unit. (See Note)
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