Tape
unit
PIPs
For
use
by
authorized
service
providers.
This
topic
contains
the
procedures
necessary
to
isolate
a
failure
in
a
tape
device.
In
these
procedures,
the
term
tape
unit
may
be
any
one
of
the
following:
v
An
internal
tape
drive;
this
includes
its
electronic
parts
and
status
indicators
v
An
internal
tape
drive;
this
includes
its
tray,
power
regulator,
and
AMDs
v
An
external
tape
drive;
this
includes
its
power
supply,
power
switch,
power
regulator,
and
AMDs
You
should
interpret
the
term
tape
unit
to
mean
the
tape
drive
you
are
working
on.
However,
this
document
uses
the
terms
tape
drive
and
enclosure
to
indicate
a
more
specific
meaning.
Read
all
safety
procedures
before
servicing
the
system.
Observe
all
safety
procedures
when
performing
a
procedure.
Unless
instructed
otherwise,
always
power
off
the
system
or
expansion
tower
where
the
FRU
is
located,
(see
before
removing,
exchanging,
or
installing
a
field-replaceable
unit
(FRU).
DANGER
To
prevent
a
possible
electrical
shock
from
touching
two
surfaces
with
different
electrical
grounds,
use
one
hand,
when
possible,
to
connect
or
disconnect
signal
cables.
(RSFTD004)
DANGER
To
prevent
a
possible
electrical
shock
during
an
electrical
storm,
do
not
connect
or
disconnect
cables
or
station
protectors
for
communications
lines,
display
stations,
printers,
or
telephones.
(RSFTD003)
DANGER
To
prevent
power
from
switching
on
automatically
during
service
procedures,
select
manual
or
secure
mode
on
the
system
unit
control
panel
or
disconnect
the
cables
that
connect
to
J15
and
J16
on
the
frame
being
serviced.
(RSFTD211)
Read
and
understand
the
following
service
procedures
before
using
this
section:
v
v
in
the
iSeries
Service
Functions
information.
Tape
unit
PIP
procedures:
v
v
v
v
v
v
v
TU-PIP1:
For
use
by
authorized
service
providers.
224
iSeries:
iSeries
Server
270,
800,
810,
820,
825,
830,
840,
870,
890,
SB2,
and
SB3
Hardware
Problem
Analysis
and
Isolation
