IBM 3270 Operation Guide

Safety Inspection
Guide
30
The intent of
this
inspection
guide
is to assist
you
in
identifying
potentially
unsafe
conditions
related
to
card
maintenance.
Good
judgment
should
be used to
identify
potential
safety
hazards
not
covered
by
this
inspection
guide.
If
any
unsafe
conditions
are
present, a
determination
must
be
made
about
how
serious
the
apparent
hazard
can be and
whether
you can
continue
without
first
correcting
the
problem.
Consider
these
conditions
and
the
safety
hazards
they
present:
•
Electrical
hazards,
especially
primary
power:
Primary
voltage
on
the
frame
can
cause
serious
or
fatal
electrical
shock.
•
Explosive
hazards: A
damaged
CRT
face
or
capacitor
can
cause
serious
injury.
•
Mechanical
hazards: Loose
or
missing
hardware
can
cause
serious
injury.
The
guide
consists
of a
series
of checks.
1.
Set
the
power
switches
for
all
personal
computer
compo-
nents to off.
2.
Disconnect
all
power
cords
from
the
power
receptacles.
3.
Check
exterior
covers
for
damage
(loose, broken,
or
sharp
edges).
4.
Check
power
cords
for
the
following:
•
Each
power
cord
must
have
a
third-wire
ground
con-
nector
in
good
condition.
Use
a
meter
to
measure
third-
wi re
ground
resistance
for
0.1
ohm
or
less
between
the
external
ground
pin and
the
frame
ground
as
specified
in the
system
hardware
maintenance
manual.
•
The
cord
set
should
be
the
appropriate
molded
type
as
specified
in
the
system
hardware
maintenance
manual.
•
The
insulation
must
not be
frayed
or
worn.

IBM 3270 Specifications

General

Brand	IBM
Model	3270
Category	Desktop
Language	English