Repair Information; Removal Precautions; Handling Esd-Sensitive Parts; Understanding The Marked Or Colored Screws - Lexmark MS911 Service Manual

Repair information

Removal precautions

CAUTION—SHOCK HAZARD: For personal safety and to prevent damage to the printer, remove the power cord
from the electrical outlet before you connect or disconnect any cable, electronic board, or assembly. Disconnect
any connections between the printer and the computer or peripherals.
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, do the following:
•
Turn off the printer before removing logic boards.
•
Keep the parts in their original packing material until you are ready to install them into the printer.
• 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 action discharges
any static electricity in your body to the printer.
•
Hold the parts by their edge connector shroud. Do not touch its pins. If you are removing a pluggable module, then
use the correct tool.
•
If possible, keep all parts in a grounded metal cabinet.
• Do not place the parts on the printer cover or on a metal table. If you need to put down the parts, then put them
into their packing material.
•
Prevent parts from being accidentally touched by other personnel. Cover the printer when you are not working on
it.
•
Be careful while working with the parts when cold-weather heating is used. Low humidity increases static electricity.

Understanding the marked or colored screws

Some parts are secured by screws that are specially marked or colored differently from the rest.
• Blue or green—These screws may loosen due to vibrations and loads during use or transport.
•
Red—These screws secure parts that are difficult to install, adjust, or align. Do not remove or loosen the parts with
red screws unless the parts are defective.
Note: In some cases, the part is secured by multiple screws but only one screw is marked in red. This part should
not also be removed or loosened unnecessarily.

Ribbon cable connectors

Zero Insertion Force (ZIF) connectors

These connectors are used on the boards and cards that are installed in the printer.
Repair information
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