Calrec S2 Operator's Manual page 56

S2
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3.11 PRE POWER CHECKS
Before connecting mains power to the power units ensure that the voltage tapping on each
unit is set for the mains voltage in use.
This is done at the factory prior to shipping for the given customer. Confirmation is given
by a label on the back of each power supply unit.
Ensure that all fuses are intact and that they are the correct rating as marked.
Each power supply unit may be energised individually, disconnected from the console if
desired to ensure correct LED indication and charge and reform the capacitors (if the
console has been a long time in transit).
Power supplies should then be connected to the console by the connections leads
provided, and to the mains supply (switched off) which should then be switched on
energising all the power supply units simultaneously.
The units are fitted with a time delay mechanism to reduce the inrush of current in this
condition.
Ensure that all the LED's are illuminated on the PSU's and that the PSU FAIL indicator is
not lit. (If it lights initially then cancel it and ensure it remains off.)
Check some desk selections and observe correct led indication.
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