Owner's Manual

8
Cambridge
Audio
Operating
instructions
cont.
Custom installation (C.I.) use
The 851C incorporates a
Control
Bus input and output that
enables un-
modulated
handset commands (positive
logic,
TIL
level)
to
be
received
electrically
by
the unit and
looped to another unit if desired.
The
se
control
commands are
typically
generated
by
custom
installation (multi-
room) systems or remote
IR
receiver systems.
The
Control
Bus sockets
are
colour-coded
orange.
An
IR
Emitter
Input
is
also
provided
that
enables modulated
IR
handset
commands to
be
received
electrically
by
the unit. Commands
on
this
input operate the unit
only and are not
looped
out
demodulated
on
the
Control
Bus Output. This feature
is
useful for
multi-room
systems (such as
the Cambridge Audio
Incognito multi-room
system) which feature routed
I.R.
emitter outputs.
Instead
of
using window emitters stuck over the
CD
players
front
panel
IR
receiver, a mono 3.5mm mini- jack to 3.5mm
mini-jack
lead
can
be
used for a more
reliable electrical
connection.
An
RS232
port
is
also featured which
allows
the 851C
to
be
controlled
by
C.
I.
systems.
In
addition the units feature "direct"
IR
Control
codes as
well
as
toggle
codes for some
of
their features to
simplify
programming custom
installation
systems.
Special
direct
On
/ Off
and Mute commands can
be accessed
on
the
supplied
handset for teaching into
C.
l.
systems as
follows:
1. Press and
hold
the
Standby/
On
button.
The
remote first generates
it's standby (toggle)
command. Keep the button
held
down, after
12
seconds a
CD
player "On"
command will
be
generated.
If
the button is
kept held
down for a further
12
seconds, a
CD
player "Off"
command
is generated.
A
full
code
table
and
RS232 protocol
for this product
is
available
on
the
Cambridge Audio website
at
:
www.cambridge-audio.com.
14
Troubleshooting
The
851C
is
a
complex
product but even so,
should
things seem not
quite right, the answer
is
very often a simple
one.
Player
will
not switch
on
Ensure the
AC
power cord
is
connected
securely.
Ensure the
plug
is
fully
inserted into the wall
socket and
that
the socket
is
switched
on
.
Check the fuse
in
the mains
plug
or adaptor.
The player
will
not read the disc
Check the disc
is
not
loaded
upside
down.
Check
that
the disc
is
not scratched or dirty.
There
is
no sound
Ensure that the amplifier
is
configured
correctly.
Check
that
the interconnects are inserted
correctly.
The disc
is
skipping
Check
that
the disc
is
not scratched or dirty.
Ensure the
player
is
on
a firm surface and not subject to vibrations.
There
is
a hum coming from the speaker
Ensure that all cable
connections are secure.
If
USB
playback,
set the
USB
Ground Lift
Switch
to
"Lift
".
The remote handset
will
not function
Check
that
the batteries have not expired.
Ensure that nothing
is
blocking
the remote sensor.