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Service Guide ML320/ML321
Chapter 3 Maintenance & Disassembly
3.1.01 General Information
This section lists the parts replacement, adjustment, cleaning, and lubrication procedures.
Disassembly should not be performed unless absolutely necessary. NEVER perform disassembly
on a malfunctioning unit until you have followed the
failure analysis procedures (
) in Section Four
of this Service Handbook.
Follow the procedures listed in Adjustments and Service Settings. Adjustments may be required
when either consumables or parts are replaced. Failure to perform these procedures could result
in unnecessary service calls.
Cleaning procedures must be performed correctly if high print quality is to be achieved.
3.1.02 Maintenance Tools
The following tools are required to service the unit.
#2 Phillips Screwdriver (with magnetic tip)
Straight-slot Screwdriver
Needle Nose Pliers (4 Inch)
Rubber Band (used during removal of upper cover)
Cutters
Feeler Gauge (capable of measuring .002, .016, and .018 inches)
Large, straightened Paper Clip (used during printhead gap adjustment)
Digital Multimeter
Shop Vacuum
Cloth (soft and lint-free)
Cotton Swabs
All-purpose Cleaner
Platen Cleaner
Contact Kleen (P/N 51802301)
Grease (Dow Corning BR2 or equivalent)
Machine Oil
3.1.03 Maintenance Precautions
-
Do NOT disassemble the unit if it is operating normally.
-
Before starting disassembly and assembly, always power OFF the unit and detach the
power cord.
-
Detach the interface cable, if installed.
-
Do not remove parts unnecessarily. Try to keep disassembly to a minimum.
-
Use the recommended maintenance tools.