19
Maximum
Volume
Protection
The maximum volume of the R200i can be software configured. This
function works to protect the connected speaker load from possible
damage due to application of excess power.
This feature can prove useful during special events or in instances where
the audio system is being enjoyed by those who are unfamiliar with the
capability of the R200i in relation to the connected speaker load.
Note: All fault conditions described below are left or right channel specific
and will be displayed individually.
When a fault occurs, the ONLY user actions allowable are:
Preamp volume can be lowered
Standby button can be operated
The electronic over current protection function is the ONLY
exception to this rule, as a reset can be attempted by depressing the
“MENU/ENTR” button.
Internal AC
Supply
Protection
The R200i monitors it’s dual AC toroidal transformer voltages, that in turn
supply the rectification stages. In the event that either toroidal transformer
AC output should fail, the amplifier will shut down and display the words
“AC FAULT”
Note: In the event of an AC fault, please allow time for the internal
toroidal transformers to cool down (several hours). These units
have an internal (automatically resetting) 120°C thermal switch on
board, which will reset when cool.
If the fault does not clear after the recommended time, please
consult your Perreaux dealer.
For more information, please refer to Chapter 15 ”Faultfinding Your
R200i” and consult the “Description of Amplifier Faults” section.
Clipping
Protection
An automatic electronic clipping protection circuit has been designed into
the unit. In the event that volume load demand is unsustainable, an
internal clipping protection algorithm is automatically activated. Under
these conditions, the volume setting is instantly reduced and then gradually
restored to the original volume set point. The clipping cycle time is
typically three seconds. The amplifier will display the word “CLIPPING”
during this time.
If during the restoration period, clipping is detected again, the process is
repeated. In this way, maximum volume demand is maintained without
sustaining any of the negative effects that a connected load can potentially
suffer from typical amplifier clipping conditions.
Please refer to the following diagram.