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Custom installation (C.I.) use
The 851E features a Control Bus input/output that
allow un-modulated remote control commands
(positive logic, TTL 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 851E to be
controlled by C.I. systems.
In addition the unit features '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 coding into C.I. systems as
follows:
1. Press and hold the Standby/On button. The remote first generates
its 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 "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
THD (+ noise)
< 0.00045% @1kHz
< 0.00057% @20kHz
S/N (unweighted)
< 110dBr
< 90dBu
Frequency response
10Hz - 100kHz ± 0.1dB
Crosstalk @1kHz
> 95dB
Input isolation
> 110dB
Maximum output
8V rms unbalanced
8V + 8V rms balanced
Output impedence
100 Ohms (Unbalanced or Balanced)
Subwoofer out
Flat or 200Hz 2nd Order Butterworth LPF
Max power consumption
36W
Bass & Treble controls
Shelving type
Max bass boost/cut ± 10 dB at 10 Hz
Max treble boost/cut ± 7.5 dB at 20 kHz
Dimensions (H x W x D)
115 x 430 x 385mm
(4.5 x 16.9 x 15.2")
Weight
8.1kg (17.9Lbs)
Troubleshooting
There is no power
IR Emitter
Control Bus
In
In
Out
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.
Make sure that the on/off switch at the back of the unit is turned on
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.
Make sure unit is not in mute mode.
If using Balanced connection ensure balanced input is selected,
indicated by a ring around the input indicator circle on the display
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 unit.
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.
The remote handset will not function
Check that the batteries have not expired.
Ensure that nothing is blocking the remote sensor.
Ensure IR receiver has not been disabled in system menu.
For more frequently asked questions (FAQs), technical advice and
information on getting the most out of your 851E, 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.
azur
851E
15
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