Repair Information 4-1
4098-001
4. Repair Information
This chapter explains how to make adjustments to the printer and
how to remove defectivepar ts.
Note: Read the following before handling electronic parts.

Handling ESD-Sensitive Parts

Many electronic products use parts that are known to be sensitive to
electrostatic discharge (ESD). Toprevent damage to ESD-sensitive
parts, follow the instructions below in addition to all the usual
precautions, such as turning off power before removinglogic boards:
•Keep the ESD-sensitive part in its original shipping container (a
special “ESD bag”) until you are ready to install the part into the
machine.
•Make the least-possible movements with yourbody to prevent
an increase of static electricity from clothing fibers, carpets, and
furniture.
•Put the ESD wrist strap on your wrist. Connect the wrist band to
the system ground point. This discharges any static electricity in
your body to the machine.
•Hold the ESD-sensitive part by its edge; do not touch its pins. If
you are removing a pluggable module, use the correct tool.
•Do not place the ESD-sensitive part on the machine cover or on
a metal table; if you need to put downthe ESD-sensitive par t for
any reason, first put it into its special bag.
•Machine covers and metal tables are electrical grounds. They
increase the risk of damage because they make a discharge
path from your body through the ESD-sensitive part. (Large
metal objects can be discharge paths without being grounded.)
•PreventESD-sensitive par ts from being accidentally touched by
other personnel. Install machine covers when you are not
working on the machine, and do not put unprotected ESD-
sensitive parts on a table.
•If possible, keep all ESD-sensitivepar ts in a grounded metal
cabinet (case).
•BeextracarefulinworkingwithESD-sensitivepartswhencold
weather heating is used because low humidity increases static
electricity.