IBM 3270 Operation Guide

5.
Refer
to
the
operator's
manual
or
hardware
maintenance
manual
for
the
personal
computer
being
serviced
for
the
proper
system
unit
cover
removal
procedures.
6.
Check
for
any
obvious
unsafe
alterations.
Use
good
judg-
ment
a:;
to
the
safety
of any
alterations.
7.
Check
inside
the
unit
for
any
obvious
unsafe
conditions,
such
as:
metal
filings,
contamination,
water
or
other
liquids,
or
signs
of
fire
or
smoke
damage.
8.
Check
for
worn,
frayed,
or
pinched
cables.
Ensure
the
voltage
specified
on
the
voltage
tag
(back panel of
the
unit)
matches
the
voltage
of
the
power
receptacle.
If
in doubt,
verify
the
voltage.
9.
Examine
the
power
supply
and
verify
the
following:
•
That
the
input
voltage
selection
switch
is
set
correctly
on the
universal
power
supplies.
•
That
nonremovable
fasteners
in
the
power-supply
cover
have
not been
removed
or
tampered
with.
•
That the
grommet
is
installed
where
the
internal
power
cables
come
through
the
frame
of
the
power
supply.
10.
Check
for
the
following
labels:
• On all
system
power
supplies:
"Caution
Hazardous
Area. Do Not
Remove
This
Cover.
Trained
Service
People
Only.
No
Serviceable
Compo-
nents
Inside."
• If
your
system
has
a
battery
unit:
"Warning:
Do
not
dispose
of
the
battery
unit
in
fire
or
water.
See
instructions
for
disposal
in the
battery
installation
instructions."
"Check
the
condition
of
the
battery."
31

IBM 3270 Specifications

General

Brand	IBM
Model	3270
Category	Desktop
Language	English