Custom Installation (C.i.) Use; Technical Specifications; Troubleshooting - Cambridge Audio Azur 851C Quick Start Manual

Custom installation (C.I.) use
The 851A features a Control Bus input/output that allow un-modulated
remote control commands {positive logic, TIL level) to be received
electrically by the unit and looped to another unit if desired. These
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 allows modulated IR remote
control 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.
An RS232C port is also featured which allows the 851A 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 remote control for teaching into C. I. 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 an amplifier "On" command will be generated. If the button
is kept held down for a further 12 seconds, an amplifier player "Off"
command is generated .
2. Press and hold the Mute button. The remote first generates it's mute
(toggle) command . Keep the button held down, after 12 seconds a
"Mute on " command will be generated. If the button is kept held down
for a further 12 seconds, a "Mute off" command is generated.
A full code table and RS232 protocol for this product is available on the
Cambridge Audio website : www.cambridge-audio.com
Technical specifications
Power Output
THO (unweighted)
Frequency Response
S/N ratio (ref 1W/8 Ohm)
Input impedances
Power Amp damping factor
Max power consumption
Minimum power
consumption
Bass & Treble controls
Dimensions (H x W x D)
Weight
120W RMS into 8 Ohms
< 0.001% 1kHz
at 80% of rated power
< 0.01% 20 Hz - 20kHz
at 80% of rated power
10 Hz- 50 kHz+/ - 1 dB
> 93dB
Input 1 and 2 (balanced) 20 kOhm
Inputs 1-7 unbalanced 20 kOhm
Rec Input 20 kOhm
>
110 at 1kHz
800W
Active (no signal) 70W
Standby <0.5W
Shelving type
Max bass boost; cut+/ - 10 dB at 10Hz
Max treble boost; cut+/- 7.5 dB at 20kHz
115 x 430 x 385mm
(4.5
X
16.9
X
15.2 ")
15.0kg (33Lbs)
azur
851A
Troubleshooting
There is no power
Ensure the AC power cord is connected securely.
Ensure the plug is fully inserted into the wall socket and is switched on .
Check fuse in the mains plug or adaptor.
There is no sound
Make sure the unit is not in Standby mode.
Check that source component is properly connected .
Check that REC IN is not switched on (unless record input is required) .
Check that your speakers are properly connected .
If using Speaker B terminals check they are switched on.
Make sure unit is not in mute mode.
There is no sound on one channel
Ensure that balance control is in the correct position.
Check speaker connections.
Check interconnects.
There is a loud buzz or hum
Check turntable or tone arm for ground and connection lead fault.
Ensure no interconnects are loose or defective.
Ensure that your tape deck/turntable is not too close to the amplifier.
Unable to make or play tape recordings
Check that Record In and Record Out have been connected correctly.
There is weak bass or diffused stereo imaging
Ensure that speakers are not wired out of phase.
Message on display flashing
See section on CAP5 protection system .
The remote handset will not function
Check that the batteries have not expired.
Ensure that nothing is blocking the remote sensor.
For more frequently asked questions (FAQ 's), technical advice and
information on getting the most out of your 851A, please visit the
Support section on Cambridge Audio's website :
www.cambridgeaudio.com/support.php
For all servicing, in or out of warranty, please contact your dealer.
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