Lexmark C910 5055-01x, Руководство по обслуживанию

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4-2
Service Manual
5055-01x
Handling Printed Circuit Boards
The following precautions must be observed when handling circuit
boards with metal oxide semiconductor integrated circuits.
Transportation/Storage:
•
During transportation or when in storage, new circuit boards
must not be indiscriminately removed from their protective
conductive bags.
•
Do not store or place circuit boards in a location exposed to
direct sunlight.
•
When it becomes absolutely necessary to remove a board from
its conductive bag or case, always place it on its conductive mat
in an area as free as possible from static electricity.
•
Do not touch pins of the integrated circuits with your bare
hands.
Replacement:
•
Before you unplug connectors from the circuit boards, be sure
the power cord has been unplugged from the power outlet.
•
When you remove a board from its conductive bag or case, do
not touch the pins of the integrated circuits or the printed
pattern. Place it in position by holding only the edges of the
board.
•
Before you plug connectors into the board, be sure the power
cord has been unplugged from the power outlet.
Inspection:
•
Avoid checking the IC directly with a multimeter; use connectors
on the board.
•
Never create a closed circuit across IC pins with a metal tool.
•
When it is absolutely necessary to touch the integrated circuits
and other electrical components on the board, be sure to
ground your body.
Service.bk Page 2 Thursday, October 4, 2001 12:20 PM