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SVCS
TM
(S ervo C ontrolled C urrent S tate)
The power amplifier must be treated appropriately imposing and its management is entrusted to
this circuit. The currents in the game, often very high, they are always kept under control even when
the amplifier is turned on to begin work. To prolong the life of exceedingly transformer and
capacitors the supply voltage is brought to regime only after a few seconds and not all at once. You
go from a 30% to 100% in about 4 seconds after. In addition to this useful function l 'SVCS controls
the power supplied from the transformer and limits the operation only in the event of excessive
thermal dissipation gradually lowering the yield up to 70% of its capacity.
THL
TM
( T hermal H eat L imiting)
The temperature of the end devices is handled by this circuit which always guarantees the correct
operation even in the event of excessive thermal stress. The circuit is activated when the
temperature on the heat sink reaches the threshold of 70 ° c. and makes sure to keep it stable within
a tolerance of 10% by acting on micro-variations of the polarization of the final stages.
The two LEDs on the front panel indicate the operation of the circuit THL. this is a condition that
occurs after a few hours of operation (in some cases after a few minutes, depending on the load
connected) and the amplifier in this condition can work continuously without the slightest problem
for many hours yet.
A thermal circuit breaker at 90 ° c. is however placed in series with the supply line to a further
guarantee of safety intervention. In the unlikely event that the circuit THL does go faulty circuit
breaker switches off the amplifier and turns it back on automatically when the temperature falls
within the parameters of safe operation.
EAM LAB Milano Italy – Copyright 10/7/2010 – www.eamlab.com – all right reserved