Royer SF-24 Betriebsanweisung PDF herunterladen (Seite 9)

Power Supply Input Module

The power OFF/ON switch and the Power Input Module are

located on the rear side of the power supply (Image 1). The

Power Input Module (Image 2) serves multiple functions and is

integral to the design of the power supply. It serves as a means

to connect and remove the AC mains cable, it houses the AC

line fuses, provides a convenient method of voltage changeover,

and also serves as an RF line ﬁlter. AC power is supplied to the

unit via a removable IEC type business machine cable that

plugs into the bottom section of the Power Input Module. The

power cord must be removed to gain access to the door to

change fuses or to set the unit to a different AC input voltage.

Fuse Replacement

Two fuses are used to protect the circuitry of the power supply, one on

each side of the mains line. To inspect or replace the line fuses (necessary

when changing voltage settings), ﬁrst remove the power cord. Insert a

medium size ﬂat-blade screwdriver into the lip at the top of the module

and gently pry the door open (Image 3). Be careful not to damage the

painted surface of the chassis housing.

The fuses are located inside two carriers, each marked with an arrow

pointing to the right. These carriers can be pulled out with the tip of a

screwdriver blade or a pair of needle nose pliers (Image 4). Once the

carriers are removed, the fuses can be pulled out with your ﬁngers.

Replacing the fuse carriers is the reverse of removal. They can only be

inserted with the arrow facing to the right and they should go in very easily.

CAUTION!

Never attempt to bypass a fuse or use one of a higher rating! Not only is this an unsafe practice,

but it will void the factory warranty.

Voltage Changeover

The power supply can be set to operate from voltages

ranging from 100 to 240 volts AC. For 230V operation, use

the 240V setting. A small window at the rear of the Input

Power Module will display the current voltage setting. To

change operation to a different AC voltage requires

repositioning the selector drum within the module. Remove

the power cord and open the module door in the same

manner as for accessing the fuses. The drum can be

removed with a small pair of needle-nosed pliers or the

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Royer SF-24 Betriebsanweisung Seite 9