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the hinge is visible in the power cord connector cavity.
Insert a small screwdriver or similar tool in the slot and
pry the cover door hinge outward. The cover door will
snap out, and then can be pivoted on its hinge for access
to the fuse block assembly and voltage selector card.
Changing the Mains Supply Voltage Configura-
tion
• Open the Power Entry Module as described above.
• The voltage selector card is a small circuit board fitted
with a white plastic indicator pin, installed in a housing
on the right side of the Power Entry Module as shown
in Figure 4. Pull the voltage selector card straight out of
the housing, using narrow pliers to grab the card. Do
not use the indicator pin as a handle.
Figure 4. Changing the mains power supply voltage.
• Orient the selector card so that the desired input voltage
is readable at the bottom, shown in Figure 5. Then
move the indicator pin to point UP, opposite the indi-
APx515 B Series Audio Analyzer: Installation
cated voltage. Seat the pin assembly in the notch on the
board edge.
• Insert the voltage selector card into the housing with the
printed side of the card facing toward the mains power
connector. The card edge indicating the desired voltage
should enter the housing first.
• Confirm that the correct fuse or fuse combination is
installed for the intended input voltage (refer to the fuse
ratings marked on the instrument rear panel). If neces-
sary, change the fuse type as described in the following
section.
100V
120V
90°
Figure 5. Voltage card selector orientation.
• Close the module the cover door and verify that the
indicator pin shows the desired voltage.
• Once you have verified that the line voltage selection is
correct, connect the power cord from a mains power
outlet to the power cord connector on the instrument
rear panel.
Fuse information
The power entry module accommodates two fusing arrange-
ments, as illustrated in Figure 6.
Installation
230V
240V
90°
90°
5
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