Preparing for use
R&S
®
LCX Series
18Getting Started 1179.2254.02 ─ 03
To check and exchange the external bias fuse:
1. NOTICE! Risk of instrument damage. Malfunction of the fuse that protects the
bias voltage input from overload can damage the circuitry of the instrument.
Do not use either fuse type other than specified, nor a defective fuse, and
never short-circuit the fuse.
Make sure that you have disconnected the R&S LCX from the mains.
2. Check the condition of the external bias fuse.
3. If necessary, install the fuse type required for the external bias voltage.
a) Unscrew the fuse holder with a suitable screwdriver.
b) Pull out the fuse holder.
c) Replace the fuse by a fuse of the specified type.
d) Insert the fuse holder into the external bias inlet.
When inserting the fuse holder, press it slightly and tighten it.
Replacing the line fuse
The product is protected by one fuse of type IEC 60127-2/5-T2.0H/250V
(order no. 0020.7546.00). The externally accessible fuse is part of the IEC socket
of the power supply at the rear panel.
To exchange the line fuse:
1. Check the available supply voltage.
The mains voltage must be within the voltage range as denoted on the instru-
ment.
The label is at the rear panel, on the left of the "AC power" connector and
power switch.
The power supply module covers a wide power supply range and normally
does not require adjustment.
2. If the power supply exceeds the permissible range, contact Rohde & Schwarz
customer service.
3. WARNING! The fuse is part of the main power supply. Handling the fuse while
the power is on can lead to electric shock.
If necessary, exchange the fuse required for the supply voltage.
4. Before changing the fuse:
a) Set the switch on the power supply to position [0].
b) Disconnect the R&S LCX from the power source.
Connecting to power
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