48
Dolby
®
Digital Cinema Presentation System User’s Manual
System Maintenance
4.2
Replacing a Show Store Power Supply
The
Show
Store
requires
only
one
power
supply;
a
second
unit
is
provided
for
backup.
If
a
problem
occurs
with
either
of
these
redundant
power
supplies,
the
power
failure
indicator
LED
on
the
front
panel
flashes
red
(see
and
a
warning
buzzer
sounds.
You
can
replace
a
failed
power
supply
during
a
show,
but
to
avoid
accidentally
removing
the
wrong
unit,
wait
until
the
theatre
is
empty
(as
the
system
continues
operating
with
one
power
supply).
The
Dolby
Cat.
No.
for
each
of
your
Show
Store’s
power
supplies
is
identified
by
a
label
affixed
to
the
right
side
of
each
unit.
Figure 4-8
Show Store Front-Panel Power Supply Indicator
To
replace
a
power
supply:
1.
Identify
the
failed
unit
in
the
rear
panel
by
its
non
illuminated
LED,
as
shown
in
Figure 4-9
Show Store Rear-Panel Failed Power Supply
4
3
2
1
!
Failed power supply
(Red LED)
Failed power supply
(Red LED)
Failed power supply
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