VINCENT STU-8 Manuel D'utilisation page 35

CONNECTIONS FOR THE STANDBY CONTROL
Many AV systems or stereo audio systems consist of a multitude of individual components. To avoid the
necessity of switching them on and off before and after every use, many manufacturers have equipped
their devices with what is known as "POWER CONTROL" circuit or "TRIGGER". This kind of remote-con-
trolled standby circuit is used primarily for preamplifier and power amplifiers. To employ these functions,
direct or indirect cable connections must be made between the preamplifier (or integrated amplifier) and
all the devices which support this function. The "POWER CONTROL" function operates in such a way that
each switching on or off of one device in the system (usually the preamplifier) automatically brings about
the switching on or off of all the connected devices which support this function. Please keep in mind that
all devices which respond to the power control are not disconnected from the mains network when switched
off. They are set to a standby state instead. For connecting cables, two-core cables with 3.5 mm jack plugs
(mono) are used. For each connection between two devices one of those cables is needed.
The STU-8 has two output connections for the power control. He can switch the signal for other compo-
nents of a stereo system and produce output. Two devices that are to receive the switch signal may be
directly connected to the two "POWER CONTROL" outputs (13).
However, if there are more than two devices, which can be controlled is connected, so it is necessary to
control connection between the preamplifier and further to lead to control devices using the outputs of the
two directly connected devices. To this end, in most devices of one of the two "POWER CONTROL" con-
nections as signal input and the others are used as signal output. This way, supplies can be theoretically
infinite in number of devices with the switching pulses. This method, the signal through the inputs and out-
puts of the devices and loop through to daisy-chain, is commonly known as "daisy chaining".
STU-8
Many devices which can be controlled by a switching signal (not preamplifiers or integrated
amplifiers), have two terminals which do not differentiate between input and output. In this case
either of the two can be selected. Even some devices that transmit the switch signal (preampli-
fiers and integrated preamplifiers) lack this marking. In this case it may be assumed that they
both are signal outputs. "POWER CONTROL" sockets of preamplifiers or integrated amplifiers
must not be interconnected! All receiving devices must not be connected to more than one pre-
amplifier or integrated amplifier (directly or indirectly)! If a "POWER CONTROL" cable is con-
nected to the back of the main amplifier and the 12V switching signal is given, the main amplifier
can no longer be switched off with the "POWER" button. If the power control function is not desi-
red, the switch signal cable must therefore be removed!
(POWER CONTROL)
power control
cables
e.g. cd player
e.g. main amplifier
Vincent
35