Toshiba E-STUDIO4508A - 7.6 Fuser Unit Status Detection Mode; 7.6.1 General description; 7.6.2 Operational flow; 7.6.3 Counters to be cleared

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PREVENTIVE MAINTENANCE (PM)

7 - 15

7.6 Fuser Unit Status Detection Mode

7.6.1 General description

As this equipment complies with the ERU provisions (Easy Replacement Unit), the fuser unit can be

removed or reinstalled without any problem.

The fuse (service part) for detection of a new fuser unit can be installed in the unit. The circuit

determining the fuser unit status judges whether the fuser unit is new or used by detecting the status of

the fuse. In addition, when the circuit detects that a new fuser unit is connected, it supplies current to

blow out the fuse to clear the fuser-related life counters.

Notes:

If only the supply parts in the fuser unit are to be replaced at PM, perform life counter clearing for

each one in the PM support mode as described in this chapter.

7.6.2 Operational flow

(1) When replacing supply parts or the fuser unit at PM, install a new fuse in it.

Notes:

If a fuser unit with an installed fuse is selected, replace that the fuse with a new one because it

will have been blown out.

(2) Install the fuser unit in the equipment.

(3) Turn the power ON. If the fuser unit is then judged determined to be new, the fuser-related life

counters are automatically cleared.

7.6.3 Counters to be cleared

• FS-08-6346: Fuser roller counter

• FS-08-6350: Pressure roller counter

• FS-08-6368: Fuser roller separation finger counter

• FS-08-6225: Number of output pages (Thick paper 1)

• FS-08-6226: Number of output pages (Thick paper 2)

• FS-08-6227: Number of output pages (Thick paper 3)

• FS-08-6228: Number of output pages (OHP film)

• FS-08-6247: Counter for envelopes

• FS-08-6244: Counter for tab paper

7.6.4 Precautions

• When the counters are not cleared, though the fuser unit is new, check that the value of the code

FS-08-4549 is set at “0”. If the value is “1”, change it to “0”, turn the power OFF and then back

ON. Then check the counter values again.

FS-08-4549 (Detection setting of new or old fuser unit) 0: Enabled, 1: Disabled

• When the fuse is not blown out, though the fuser unit is new, a C4C0 error occurs. In this case,

replace the fuse and turn the power OFF and then back ON, or remove the fuse and clear the

counters in the PM support mode.

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