3.
Attention:
Some
electrical
circuits
could
be
damaged
if
the
external
SCSI
cables
are
connected
to
the
2104
Model
TS4
while
the
grounding
check
is
being
done.
Ensure
that
no
external
SCSI
cables
are
connected
at
the
SCSI
connectors
2
.
See
Figure
8
on
page
xv.
4.
Check
for
continuity
between
the
chassis
of
the
2104
Model
TS4
3
and
the
ground
pin
of
each
power
cable.
a.
Check
the
power
cables
and
ensure
that
the
third-wire
ground
connector
is
in
good
condition.
b.
Use
a
meter
to
check
that
the
third-wire
ground
continuity
is
0.1
ohm
or
less
between
the
external
ground
pin
and
the
chassis
ground.
5.
If
the
continuity
is
good,
the
grounding
check
is
complete.
6.
If
the
grounding
is
not
correct,
unplug
the
power
cables
from
the
mainline
power
connectors.
a.
Check
each
power
cable
for
continuity.
b.
If
either
power
cable
is
failing,
exchange
it
for
a
new
one.
c.
Check
for
continuity
between
the
chassis
of
the
2104
Model
TS4
and
the
ground
pin
1
of
the
power
connector
on
each
fan-and-power-supply
assembly.
See
Figure
9.
d.
If
either
fan-and-power-supply
assembly
does
not
have
continuity,
exchange
that
assembly
for
a
new
one.
(See
the
section
about
fan
and
power
supply
assemblies
in
Expandable
Storage
Plus
2104
Model
DS4
and
Model
TS4
Service
Guide
.)
Perform
step
1
on
page
xv
through
step
6d
to
complete
the
grounding
check
again.
Figure
9.
Ground
pin
(2104
Model
TS4)
xvi
Expandable
Storage
Plus
2104
Model
DS4
and
Model
TS4
Operator’s
Guide
Summary of Contents for Bull Escala 2104 DS4
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