New Fusing Unit Detection
There are two types of fusing unit: Service part, and Maintenance Kit part.
Only the fusing unit in the maintenance kit has the detection mechanism.
In the maintenance kit fusing unit, the looped wire on the fusing unit connector contains a fuse [A]. When
power is switched on after installing a new fusing unit, the engine board detects the fusing unit through the
looped wire. However, the fuse opens very shortly afterwards.
What happens next depends on the setting of engine SP mode 5930 (Meter Charge):
• If Meter Charge Mode is enabled, after the technician replaces the fusing unit, the maintenance
counter must be reset with SP mode 7804.
• If Meter Charge Mode is disabled (default), after the fusing unit has been replaced: (1) the CPU
detects the new unit, (2) the “Replace Maintenance Kit” message disappears automatically, and (3)
the maintenance counter resets automatically.
Image Fusing and Paper Exit
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