Lexmark 4039-1XX Manuale Utente

Repair Information

This chapter explains how to make adjustments to the printer and 
how to remove defective FRUs.

Many electronic products use parts that are known to be sensitive to 
electrostatic discharge (ESD). To prevent damage to ESD-sensitive 
parts, follow the instructions below in addition to all the usual 
precautions, such as turning off power before removing logic 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 your body to prevent an 
increase of static electricity from clothing fibers, carpets, and fur-
niture.

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 connector shroud 
(cover); 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 down the ESD-sensitive part 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.)

Prevent ESD-sensitive parts from being accidentally touched by 
other personnel. Install machine covers when you are not work-
ing on the machine, and do not put unprotected ESD-sensitive 
parts on a table.

If possible, keep all ESD-sensitive parts in a grounded metal 
cabinet (case).

Be extra careful in working with ESD-sensitive parts when cold-
weather heating is used because low humidity increases static 
electricity.