24 APx515 B Series Audio Analyzer: Installation
grab the card. Do not use the indicator pin as a han-
dle.
Figure 4. Changing the mains power supply volt-
age.
• Orient the selector card so that the desired input volt-
age is readable at the bottom, shown in Figure 5.
Then move the indicator pin to point UP, opposite the
indicated 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
necessary, change the fuse type as described in the
following section.
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
arrangements, as illustrated in Figure 6.
100/120 VAC operation
The 100/120 VAC fusing arrangement uses a single
type 3AG (0.25" x 1.25") slo-blo fuse. Audio Precision
recommends only the following replacement fuse:
100V 120V 230V 240V
90° 90° 90°
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