Spirent communications SmartBits 200 Use and care manual

Power Cable/Fuse Replacement |1
P/N 340-1228-001 Rev B, 2/03
Power Cable/Fuse Replacement
This document describes how to change the power cord and fuse on a SmartBits chassis
when using the Power Cable/Fuse Kit that is shipped with the chassis.
The Power Cable/Fuse Kit contains the power cable and fuses that should be used for
international operation (other than U.S.A.) in a SmartBits chassis, in compliance with
safety requirements. Each SmartBits chassis is shipped with the default U.S.A. fuses
installed.
Fuse Amperage Information
Table 1 lists the fuse amperage specified for each SmartBits chassis.
Table 1. Fuse Amperage for SmartBits Chassis
Chassis Fuse Amperage U.S.A. Fuse Amperage International
SmartBits 200 2 Amp. 1 Amp.
SmartBits 10
SmartBits 2000 3.15 Amp. 2 Amp.
SmartBits 600 2 Amp. 1 Amp.
SmartBits 6000B 10 Amp. 5 Amp.

Power Cable/Fuse Replacement
Chassis Fuse Location
2|Power Cable/Fuse Replacement P/N 340-1228-001 Rev B, 2/03
Chassis Fuse Location
The power supply inlet switch is the main disconnect device and is located on the rear of
each SmartBits chassis. It houses the power switch, fuse holder, and a universal 3-wire
instrument power cord jack. The power supply connector in each SmartBits chassis has a
universal input that accepts 120/240 VAC and requires no selection or adjustment.
Warning: To comply with safety regulations, always make sure that the chassis is pow-
ered off and disconnected when removing or inserting fuses.
Figure 1 shows the location of the power supply inlet switch on each SmartBits chassis.
Figure 1. Location of Power Supply Inlet Switch
Types of Power Supply Inlet Switches
There are two types of power supply inlet switches used in the SmartBits chassis. One
type is used with the SMB-10, SMB-200, SMB-2000, and SMB-600 chassis and is
described on page 3. The other type is used in the SMB-6000B and is described on page 4.
The fuse holder is located within the power supply inlet switch (see Figure 2). Use a
small, flat-head screwdriver to open the fuse holder for each switch.
Figure 2. Fuse Holder Location on the Power Supply Inlet Switches
SMB-200 SMB-10/SMB-2000
SMB-600 SMB-6000B
Power Supply Inlet Switch
Power Supply Inlet Switch
Power Supply Inlet Switch for
the SMB-10, SMB-200,
SMB-2000, and SMB-600
PowerSupplyInlet
Switch for the
SMB-6000B
Slot
Slot
Fuse Holder
Fuse Holder
The dotted line
shows the fuse
holder located
under the cover.

Power Cable/Fuse Replacement
Installing a Chassis Fuse
Power Cable/Fuse Replacement |3
P/N 340-1228-001 Rev B, 2/03
Installing a Chassis Fuse
The installation of a SmartBits chassis fuse varies based on the chassis model. Refer to the
appropriate procedure below to install the fuse for your SmartBits chassis model.
SMB-10, SMB-200, SMB-2000, and SMB-600 Power Supply Inlet Switch
To remove or change a fuse:
1If your chassis is operating, power down the chassis and disconnect the power supply
cable from its power source.
2Insert the screwdriver in the fuse holder assembly slot shown in Figure 3 and pry the
fuse holder open.
Figure 3. Fuse Holder Assembly Slot Location on the Power Supply Inlet Switch
(SMB-10/200/2000/600)
3Slide the fuse holder assembly out of the power supply inlet switch.
4Locate the fuse that is attached to the bottom of the fuse holder assembly shown in
Figure 4.
Figure 4. Fuse Holder Assembly Removed from the Power Supply Inlet Switch
Slot
Fuse Holder Assembly
(slides out)
Power Supply Inlet Switch
(SMB-10/200/2000/600)
Fuse Location
Fuse Holder
Assembly

Power Cable/Fuse Replacement
Installing a Chassis Fuse
4|Power Cable/Fuse Replacement P/N 340-1228-001 Rev B, 2/03
5Remove the fuse and replace it with the international fuse provided in the Power
Cable/Fuse Kit.
6Replace the fuse holder assembly by sliding it back into the power supply inlet switch
until it snaps into its proper position.
7Connect the new international power supply cable provided in the Power Cable/Fuse
Kit.
Note: In the fuse holder assembly, there is a small compartment that slides open (see
Figure 5). This is used to hold a spare fuse. To open the compartment, use a pointed
instrument (such as a pencil) and push the compartment out from either end.
Figure 5. Spare Fuse Compartment in the Fuse Holder Assembly
SMB-6000B Power Supply Inlet Switch
To remove or change a fuse:
1If your chassis is operating, power down the chassis and disconnect the power supply
cable from its power source.
2Insert the screwdriver in the cover slot as shown in Figure 6 and pry open the cover.
Figure 6. Fuse Holder Assembly Cover Slot Location on a Power Supply Inlet Switch
(SMB-6000B)
Spare Fuse Compartment
Cover opens
downward
Slot Power Supply Inlet Switch
(SMB-6000B)

Power Cable/Fuse Replacement
Installing a Chassis Fuse
Power Cable/Fuse Replacement |5
P/N 340-1228-001 Rev B, 2/03
3Use the screwdriver again and place it in the slot at the top of the red fuse holder
assembly (Figure 7), then pry the assembly out.
Figure 7. Fuse Holder Assembly Slot Location (SMB-6000B)
4Slide the fuse holder assembly out of the power supply inlet switch.
5Locate the fuse that is attached to the side of the fuse holder (Figure 8).
Figure 8. Fuse Location in the Fuse Holder Assembly
6Remove the fuse and replace it with the international fuse provided in the Power
Cable/Fuse Kit.
7Replace the fuse holder assembly by sliding it back into the power supply inlet switch
until it snaps into its proper position.
8Close the cover of the switch until it snaps shut.
9Connect your new international power supply cable provided in the Power Cable/Fuse
Kit.
Slot
Fuse Holder
Assembly
(slides out)
Power Supply Inlet Switch
(SMB-6000B)
Fuse Location