CYRUS CD6s MCBUS OPERATION
© Cyrus Audio Ltd Nov 2006
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Cyrus CD6s Service Manual Issue 2
The MC-Bus system
MC-Bus is a system which provides communication between the control systems of a number of
Cyrus products. The communication takes the form of a serial data stream which is sent from a
'master' product and received and repeated by 'slave' products. The data is thus passed from one
product to another around a loop. The master product should then receive the message back
which confirms that loop connections have been correctly made. The CD player is a 'slave'
product and listens for 'CD' commands from the master product in the loop (usually an amplifier
or surround decoder).
MC-Bus system tests
The MC-Bus system can be tested by connecting the CD6s into a known working Cyrus system.
Note that MC-Bus must be connected as a closed loop as shown in the diagram below. It is also
important to connect the audio signal cables between components to provide an adequate ground
return path for the MC-Bus signals. Switch on the power to the system and set all components to
Standby. Selecting the CD input on the amplifier will bring the CD6s out of standby. When the
amplifier is set to Standby, all other components connected to the MC-Bus loop will also set to
Standby.
Cyrus CD6s
Cyrus Integrated
amplifier
MC-Bus output
MC-Bus output
MC-Bus input
MC-Bus input
Summary of Contents for CD6s
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