Fisher CR-7000 - Suggestions for Handling LSI and CMOS; Transit and Storage Precautions; Repairing Precautions; LSI Replacement Precautions

SUGGESTIONS FOR HANDLING LSI AND C MOS
(1) In the case of transit or storage
LSI (large-scale integrated circuit) is extremely sensitive and
vulnerable to static electricity, and may be damaged if it is expos-
ed to a strong electrostatic field. So, be careful to avoid such a
possibility when carrying or storing LSI‘s. Similar care is necessary
in handling C MOS'’s.
(a) To store the LSI (b) How to handle the LS!
Conductive urethane foam
Never touch the LSI terminals.
Take it at both ends of the package.
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Be sure to keep the LSI inserted in the conductive
urethane foam until it is put to use. (This is for
keeping the potential at each terminal equal.)
(C) To store the LSI, avoid places where temperature
or humidity is high, or where there is a strong
magnetic field.
(2) Suggestions for repairing -
(a) Before replacing the LSI, be sure to pull out the power plug. (b) All the equipment, measuring instruments, and tools should be
grounded.
Ground the work table by covering it a conductive sheet.
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Ground the soldering iron in order to The repairman should ground his body electrically
prevent
the
AC
leakage.
by
touching
the
ground
line
with
his
hand
before
he handles the LSI.
(3) Suggestions for replacement of LSI
(a)
There
is
a
mark
on
one
side
of
the
LSI.
This
is
for
preventing
(b)
1f
power
is
supplied
to
the
unit
with
the
LSI
inserted
in
a
you
from
inserting
the
LSI
in
a
wrong
way.
wrong
way,
the
LSI
must
be
discarded.
(The
LSI
may
still
be
good immediately after, but it will break down in the course of
use.)
a iy
Sins CARSON
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