FRONT
PANEL
CONTROL
PCB
©
Cyrus
Audio
Ltd
Jun
2014
11
Cyrus
6
DAC,
Cyrus
8
DAC
service
manual
Issue
1
The
front
panel
control
PCB
changed
during
the
life
of
the
amplifiers.
The
two
PCB
versions
are
easy
to
identify
without
dismantling
the
amplifier.
The
rotary
control
of
the
later
version
display
PCB
includes
a
push
function,
the
earlier
control
PCB
does
not.
Operation
of
the
amplifier
changed
slightly
with
the
introduction
of
the
push
function.
In
the
event
that
a
front
panel
control
PCB
requires
replacement,
the
replacement
PCB
supplied
will
be
the
same
type
as
the
original.
When
ordering
a
replacement
PCB,
always
quote
the
serial
number
of
the
amplifier
and
state
whether
the
rotary
control
has
a
push
function.
NOTE:
The
two
types
of
control
PCB
are
not
directly
interchangeable.
To
replace
an
original
'non
‐
push'
type
PCB
with
the
later
type
'push'
PCB
would
require
changes
in
other
circuit
areas
and
also
updated
user
instructions.
The
amplifier
operational
software
is
located
on
the
front
panel
control
PCB.
Front
panel
control
PCBs
without
push
control
Replacement
PCBs
are
supplied
'clean'
of
software
so
when
replacing
this
type
it
will
always
be
necessary
to
program
the
PCB
via
the
amplifier
programming
connector.
Front
panel
control
PCBs
with
push
control
Replacement
PCBs
are
supplied
pre
‐
programmed
so
can
be
fitted
without
re
‐
programming
via
the
amplifier.
Refer
to
page
20
for
more
information
about
programming
the
amplifiers.
