Lexmark 2380 - Forms Printer B/W Dot-matrix, Service Manual

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Repair Information 4-1
4. Repair Information
This chapter contains adjustments and removal procedures.
Whenever parts are replaced, make sure that all adjustments are
correct by running diagnostics procedures and checking
adjustments as needed.
Handling ESD-Sensitive Parts
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
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 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 touching other personnel.
Install machine covers when not working on the machine, and
do not put unprotected ESD-sensitive parts on a table.
•
Keep all ESD-sensitive parts in a grounded metal cabinet
(case).
•
Low humidity increases static electricity during cold-weather.
23xx.bk Page 1 Wednesday, March 13, 2002 10:42 AM