Power Supply - Lab.gruppen D Series Operation Manual

11. Operation and performance 11. Operation and performance
The presence of a short circuit (or low impedance) is re–tested every six seconds, and the output remains muted
until the fault clears.
11.3.12. Power supply protection
The power supply is very advanced and has several internal control and monitoring functions. Should any of these
fail, the power supply will shut down to prevent damage or limit severity of the failure. If the power supply shuts
down audio will be muted. Power supply faults, or power supply needs service faults, are indicated by a red LED
and associated error messages registered in Lake Controller and CAFÉ software programs.
In the extreme event of simultaneous low mains voltage supply and high power demand, the amount of incoming
condition is a power protect fault, indicated with a red LED and associated error messages registered in Lake
Controller and CAFÉ software programs.
11.3.12.1. Mains anomaly protection
mains service.
Over–voltage – If the power supply detects mains voltage above 400 V peak or 270 V RMS, it will enter protective
associated error messages will register in Lake Controller and CAFÉ software programs.
Under–voltage – If the power supply detects mains voltage of less than 65 V, it will enter protective shut down
mode. The amplifier will auto– restart if the condition clears. Will be indicated by a red LED and associated error
messages will register in Lake Controller and CAFÉ software programs.
Mains instability – If the power supply detects protracted instability in the AC mains, it will enter protective
shut down mode (D 200:4L, D 120:4L and D 80:4L only). The ampli
Will be indicated by a red LED and associated error messages will register in Lake Controller and CAFÉ
software programs.
Mains glitch – If the power supply detects a momentary mains glitch (missing cycles) at the AC inlet, a warning
indication will be reported with a yellow LED and associated error messages will register in Lake Controller and
CAFÉ software programs (D 200:4L, D 120:4L and D 80:4L only). The powers supply and product continue
operation throughout a mains glitch.

11.4. Power Supply

The R.SMPS (Regulated Switch Mode Power Supply) is designed to keep supply voltage rails at optimum levels.
Thus the R.SMPS can deliver full rail voltage to the output sta
consistent transient response and a clean LF response.
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D SERIES Lake Operation Manual rev 3.0.4
D SERIES Lake Operation Manual rev 3.0.3
supply will then be forced to shut down. This