Preventive Maintenance; Precautions For Periodic Maintenance Service - Panasonic FP-7742 Service Manual

Section IV Preventive Maintenance
The periodic maintenance service is performed by machine cleaning and parts
replacements.
It is essential to perform these service activities properly for customer satisfacation.
The purpose of this service is to maintain the machine performance and the copy
quality.

4. 1 Precautions for Periodic Maintenance Service

• You should get the customer's agreement for when and where the maintenance
service is performed.
• You should completely explain the philosophy maintenance service is not to
repair problems, but to avoid them.
• You should prepare the necessary replacement parts and tools for cleaning
beforehand.
• After finishing the maintenance service, you should discard the waste parts
and papers, and clean the surrounding area.
• Let the customer know when you are finished.
• Before removing the equipment, pull out the plug.
• Before using solvents such as IPA (isopropyl alcohol), put on rubber gloves
and eye protection.
(1) Timing
• Perform the periodic maintenance service in accordance with the chart of
periodic maintenance areas.
(2) Cleaning of roller
• Rollers should be cleaned with water and cloth.
• Use IPA (isopropyl alcohol) if they are very dirty.
(3) Precautions for disassembly and adjustment
• Before disassembling the machine, disconnect the power plug.
• After taking apart, do not operate the machine.
When operating the machine with the cover removed, be careful so that clothes
are not caught by moving components.
• When electricity is applied, the connectors on any P.C.B. must not be connected
or disconnected.
• Using a vacuum cleaner for the cleaning of the TDC sensor could cause
electrostatic damage, therefore, use blower brush and cotton swab for the
cleaning of these parts. And, before cleaning any units, remove the sensors
beforehand.
• For the drum, comply with the precautions shown in 1.8 "Precautions with
consumables".
• Make sure to use the correct screw sizes.
• Use toothed lock washer for the installation of ground wires to secure electrical
continuity.
• Reassemble parts in the reverse sequence of the disassembling unless
otherwise noted.
• Replace blown fuses with the specified rated ones.
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