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4. Preventive Maintenance
When you visit a customer, perform preventive maintenance services irrespective of the major object of
your visit to prevent possible troubles beforehand.
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Preventive maintenance procedure
1) Ask the customer how the laser printer is used.
2) Record the accumulated number of sheets printed.
Replace the parts to be replaced periodically based on the number of prints. If
required, replace such parts at this time.
3) Print on several sheets of paper to check for proper operation.
4) Remove foreign substances on the Transfer Unit (BTR), Imaging Unit (PHD), FUSER ASSY and paper
delivery rolls and clean stains with a brush or dry cloth.
If stain is serious, clean with wet cloth and then dry cloth. Be careful not to damage the
parts at this time.
5) Cleaning of fan exhaust port
Remove the FRONT HEAD COVER and clean the FUSER FAN to remove dust deposited on it with a
brush. Remove the REAR COVER and clean the dust deposit on the fan.
If the exhaust port or fan is clogged, temperature in this laser printer increases
causing trouble.
6) Print on several sheets again to check for proper operation.